文件 AWS 開發套件範例 GitHub 儲存庫中有更多可用的 [AWS SDK 範例](https://github.com/awsdocs/aws-doc-sdk-examples)。

本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

# 使用 AWS SDKs程式碼範例
<a name="sfn_code_examples"></a>

下列程式碼範例示範如何 AWS Step Functions 搭配 AWS 軟體開發套件 (SDK) 使用 。

*基本概念*是程式碼範例，這些範例說明如何在服務內執行基本操作。

*Actions* 是大型程式的程式碼摘錄，必須在內容中執行。雖然動作會告訴您如何呼叫個別服務函數，但您可以在其相關情境中查看內容中的動作。

*案例*是向您展示如何呼叫服務中的多個函數或與其他 AWS 服務組合來完成特定任務的程式碼範例。

**其他資源**
+  **[Step Functions 開發人員指南](https://docs.aws.amazon.com/step-functions/latest/dg/welcome.html)** – Step Functions 的詳細資訊。
+ **[Step Functions API 參考](https://docs.aws.amazon.com/step-functions/latest/apireference/Welcome.html)** – 所有可用 Step Functions 動作的詳細資訊。
+ **[AWS 開發人員中心](https://aws.amazon.com/developer/code-examples/?awsf.sdk-code-examples-product=product%23step-functions)** – 您可以依類別或全文搜尋篩選的程式碼範例。
+ **[AWS SDK 範例](https://github.com/awsdocs/aws-doc-sdk-examples)** – GitHub 儲存庫使用慣用語言的完整程式碼。包含設定和執行程式碼的指示。

**Contents**
+ [基本概念](sfn_code_examples_basics.md)
  + [Hello Step Functions](sfn_example_sfn_Hello_section.md)
  + [了解基本概念](sfn_example_sfn_Scenario_GetStartedStateMachines_section.md)
  + [動作](sfn_code_examples_actions.md)
    + [`CreateActivity`](sfn_example_sfn_CreateActivity_section.md)
    + [`CreateStateMachine`](sfn_example_sfn_CreateStateMachine_section.md)
    + [`DeleteActivity`](sfn_example_sfn_DeleteActivity_section.md)
    + [`DeleteStateMachine`](sfn_example_sfn_DeleteStateMachine_section.md)
    + [`DescribeExecution`](sfn_example_sfn_DescribeExecution_section.md)
    + [`DescribeStateMachine`](sfn_example_sfn_DescribeStateMachine_section.md)
    + [`GetActivityTask`](sfn_example_sfn_GetActivityTask_section.md)
    + [`ListActivities`](sfn_example_sfn_ListActivities_section.md)
    + [`ListExecutions`](sfn_example_sfn_ListExecutions_section.md)
    + [`ListStateMachines`](sfn_example_sfn_ListStateMachines_section.md)
    + [`SendTaskSuccess`](sfn_example_sfn_SendTaskSuccess_section.md)
    + [`StartExecution`](sfn_example_sfn_StartExecution_section.md)
+ [案例](sfn_code_examples_scenarios.md)
  + [建立傳訊應用程式](sfn_example_cross_StepFunctionsMessenger_section.md)
  + [使用 Step Functions 協調生成式 AI 應用程式](sfn_example_cross_ServerlessPromptChaining_section.md)
  + [使用 Step Functions 調用 Lambda 函式](sfn_example_cross_ServerlessWorkflows_section.md)

# 使用 AWS SDKs基本範例
<a name="sfn_code_examples_basics"></a>

下列程式碼範例示範如何 AWS Step Functions 搭配 AWS SDKs 使用 的基本概念。

**Contents**
+ [Hello Step Functions](sfn_example_sfn_Hello_section.md)
+ [了解基本概念](sfn_example_sfn_Scenario_GetStartedStateMachines_section.md)
+ [動作](sfn_code_examples_actions.md)
  + [`CreateActivity`](sfn_example_sfn_CreateActivity_section.md)
  + [`CreateStateMachine`](sfn_example_sfn_CreateStateMachine_section.md)
  + [`DeleteActivity`](sfn_example_sfn_DeleteActivity_section.md)
  + [`DeleteStateMachine`](sfn_example_sfn_DeleteStateMachine_section.md)
  + [`DescribeExecution`](sfn_example_sfn_DescribeExecution_section.md)
  + [`DescribeStateMachine`](sfn_example_sfn_DescribeStateMachine_section.md)
  + [`GetActivityTask`](sfn_example_sfn_GetActivityTask_section.md)
  + [`ListActivities`](sfn_example_sfn_ListActivities_section.md)
  + [`ListExecutions`](sfn_example_sfn_ListExecutions_section.md)
  + [`ListStateMachines`](sfn_example_sfn_ListStateMachines_section.md)
  + [`SendTaskSuccess`](sfn_example_sfn_SendTaskSuccess_section.md)
  + [`StartExecution`](sfn_example_sfn_StartExecution_section.md)

# Hello Step Functions
<a name="sfn_example_sfn_Hello_section"></a>

下列程式碼範例示範如何開始使用 Step Functions。

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。

```
namespace StepFunctionsActions;

using Amazon.StepFunctions;
using Amazon.StepFunctions.Model;

public class HelloStepFunctions
{
    static async Task Main()
    {
        var stepFunctionsClient = new AmazonStepFunctionsClient();

        Console.Clear();
        Console.WriteLine("Welcome to AWS Step Functions");
        Console.WriteLine("Let's list up to 10 of your state machines:");
        var stateMachineListRequest = new ListStateMachinesRequest { MaxResults = 10 };

        // Get information for up to 10 Step Functions state machines.
        var response = await stepFunctionsClient.ListStateMachinesAsync(stateMachineListRequest);

        if (response.StateMachines.Count > 0)
        {
            response.StateMachines.ForEach(stateMachine =>
            {
                Console.WriteLine($"State Machine Name: {stateMachine.Name}\tAmazon Resource Name (ARN): {stateMachine.StateMachineArn}");
            });
        }
        else
        {
            Console.WriteLine("\tNo state machines were found.");
        }
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 .NET 的 AWS SDK API 參考》**中的 [ListStateMachines](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/ListStateMachines)。

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。
Hello 的 Java 版本。  

```
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.sfn.SfnClient;
import software.amazon.awssdk.services.sfn.model.ListStateMachinesResponse;
import software.amazon.awssdk.services.sfn.model.SfnException;
import software.amazon.awssdk.services.sfn.model.StateMachineListItem;
import java.util.List;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class ListStateMachines {
    public static void main(String[] args) {
        Region region = Region.US_EAST_1;
        SfnClient sfnClient = SfnClient.builder()
                .region(region)
                .build();

        listMachines(sfnClient);
        sfnClient.close();
    }

    public static void listMachines(SfnClient sfnClient) {
        try {
            ListStateMachinesResponse response = sfnClient.listStateMachines();
            List<StateMachineListItem> machines = response.stateMachines();
            for (StateMachineListItem machine : machines) {
                System.out.println("The name of the state machine is: " + machine.name());
                System.out.println("The ARN value is : " + machine.stateMachineArn());
            }

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
}
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [ListStateMachines](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/ListStateMachines)。

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
import aws.sdk.kotlin.services.sfn.SfnClient
import aws.sdk.kotlin.services.sfn.model.ListStateMachinesRequest

/**
 Before running this Kotlin code example, set up your development environment,
 including your credentials.

 For more information, see the following documentation topic:
 https://docs.aws.amazon.com/sdk-for-kotlin/latest/developer-guide/setup.html
 */

suspend fun main() {
    println(DASHES)
    println("Welcome to the AWS Step Functions Hello example.")
    println("Lets list up to ten of your state machines:")
    println(DASHES)

    listMachines()
}

suspend fun listMachines() {
    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.listStateMachines(ListStateMachinesRequest {})
        response.stateMachines?.forEach { machine ->
            println("The name of the state machine is ${machine.name}")
            println("The ARN value is ${machine.stateMachineArn}")
        }
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的AWS SDK API 參考》**的 [ListStateMachines](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/stepfunctions#code-examples)中設定和執行。

```
import boto3


def hello_stepfunctions(stepfunctions_client):
    """
    Use the AWS SDK for Python (Boto3) to create an AWS Step Functions client and list
    the state machines in your account. This list might be empty if you haven't created
    any state machines.
    This example uses the default settings specified in your shared credentials
    and config files.

    :param stepfunctions_client: A Boto3 Step Functions Client object.
    """
    print("Hello, Step Functions! Let's list up to 10 of your state machines:")
    state_machines = stepfunctions_client.list_state_machines(maxResults=10)
    for sm in state_machines["stateMachines"]:
        print(f"\t{sm['name']}: {sm['stateMachineArn']}")


if __name__ == "__main__":
    hello_stepfunctions(boto3.client("stepfunctions"))
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [ListStateMachines](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/ListStateMachines)。

------

# 使用 AWS SDK 了解 Step Functions 的基本概念
<a name="sfn_example_sfn_Scenario_GetStartedStateMachines_section"></a>

下列程式碼範例示範如何：
+ 建立活動。
+ 從 Amazon States Language 定義建立狀態機器，其中包含先前建立的活動步驟。
+ 執行狀態機器，並使用使用者輸入回應活動。
+ 在執行完成後取得最終狀態和輸出，然後清除資源。

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。
在命令提示中執行互動式案例。  

```
global using System.Text.Json;
global using Amazon.StepFunctions;
global using Microsoft.Extensions.Configuration;
global using Microsoft.Extensions.DependencyInjection;
global using Microsoft.Extensions.Hosting;
global using Microsoft.Extensions.Logging;
global using Microsoft.Extensions.Logging.Console;
global using Microsoft.Extensions.Logging.Debug;
global using StepFunctionsActions;
global using LogLevel = Microsoft.Extensions.Logging.LogLevel;



using Amazon.IdentityManagement;
using Amazon.IdentityManagement.Model;
using Amazon.StepFunctions.Model;

namespace StepFunctionsBasics;

public class StepFunctionsBasics
{
    private static ILogger _logger = null!;
    private static IConfigurationRoot _configuration = null!;
    private static IAmazonIdentityManagementService _iamService = null!;

    static async Task Main(string[] args)
    {
        // Set up dependency injection for AWS Step Functions.
        using var host = Host.CreateDefaultBuilder(args)
            .ConfigureLogging(logging =>
                logging.AddFilter("System", LogLevel.Debug)
                    .AddFilter<DebugLoggerProvider>("Microsoft", LogLevel.Information)
                    .AddFilter<ConsoleLoggerProvider>("Microsoft", LogLevel.Trace))
            .ConfigureServices((_, services) =>
                services.AddAWSService<IAmazonStepFunctions>()
                    .AddAWSService<IAmazonIdentityManagementService>()
                    .AddTransient<StepFunctionsWrapper>()
            )
            .Build();

        _logger = LoggerFactory.Create(builder => { builder.AddConsole(); })
            .CreateLogger<StepFunctionsBasics>();

        // Load configuration settings.
        _configuration = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("settings.json") // Load test settings from .json file.
            .AddJsonFile("settings.local.json",
                true) // Optionally load local settings.
            .Build();

        var activityName = _configuration["ActivityName"];
        var stateMachineName = _configuration["StateMachineName"];

        var roleName = _configuration["RoleName"];
        var repoBaseDir = _configuration["RepoBaseDir"];
        var jsonFilePath = _configuration["JsonFilePath"];
        var jsonFileName = _configuration["JsonFileName"];

        var uiMethods = new UiMethods();
        var stepFunctionsWrapper = host.Services.GetRequiredService<StepFunctionsWrapper>();

        _iamService = host.Services.GetRequiredService<IAmazonIdentityManagementService>();

        // Load definition for the state machine from a JSON file.
        var stateDefinitionJson = File.ReadAllText($"{repoBaseDir}{jsonFilePath}{jsonFileName}");

        Console.Clear();
        uiMethods.DisplayOverview();
        uiMethods.PressEnter();

        uiMethods.DisplayTitle("Create activity");
        Console.WriteLine("Let's start by creating an activity.");
        string activityArn;
        string stateMachineArn;

        // Check to see if the activity already exists.
        var activityList = await stepFunctionsWrapper.ListActivitiesAsync();
        var existingActivity = activityList.FirstOrDefault(activity => activity.Name == activityName);
        if (existingActivity is not null)
        {
            activityArn = existingActivity.ActivityArn;
            Console.WriteLine($"Activity, {activityName}, already exists.");
        }
        else
        {
            activityArn = await stepFunctionsWrapper.CreateActivity(activityName);
        }

        // Swap the placeholder in the JSON file with the Amazon Resource Name (ARN)
        // of the recently created activity.
        var stateDefinition = stateDefinitionJson.Replace("{{DOC_EXAMPLE_ACTIVITY_ARN}}", activityArn);

        uiMethods.DisplayTitle("Create state machine");
        Console.WriteLine("Now we'll create a state machine.");

        // Find or create an IAM role that can be assumed by Step Functions.
        var role = await GetOrCreateStateMachineRole(roleName);

        // See if the state machine already exists.
        var stateMachineList = await stepFunctionsWrapper.ListStateMachinesAsync();
        var existingStateMachine =
            stateMachineList.FirstOrDefault(stateMachine => stateMachine.Name == stateMachineName);
        if (existingStateMachine is not null)
        {
            Console.WriteLine($"State machine, {stateMachineName}, already exists.");
            stateMachineArn = existingStateMachine.StateMachineArn;
        }
        else
        {
            // Create the state machine.
            stateMachineArn =
                await stepFunctionsWrapper.CreateStateMachine(stateMachineName, stateDefinition, role.Arn);
            uiMethods.PressEnter();
        }

        Console.WriteLine("The state machine has been created.");
        var describeStateMachineResponse = await stepFunctionsWrapper.DescribeStateMachineAsync(stateMachineArn);

        Console.WriteLine($"{describeStateMachineResponse.Name}\t{describeStateMachineResponse.StateMachineArn}");
        Console.WriteLine($"Current status: {describeStateMachineResponse.Status}");
        Console.WriteLine($"Amazon Resource Name (ARN) of the role assumed by the state machine: {describeStateMachineResponse.RoleArn}");

        var userName = string.Empty;
        Console.Write("Before we start the state machine, tell me what should ChatSFN call you? ");
        userName = Console.ReadLine();

        // Keep asking until the user enters a string value.
        while (string.IsNullOrEmpty(userName))
        {
            Console.Write("Enter your name: ");
            userName = Console.ReadLine();
        }

        var executionJson = @"{""name"": """ + userName + @"""}";

        // Start the state machine execution.
        Console.WriteLine("Now we'll start execution of the state machine.");
        var executionArn = await stepFunctionsWrapper.StartExecutionAsync(executionJson, stateMachineArn);
        Console.WriteLine("State machine started.");

        Console.WriteLine($"Thank you, {userName}. Now let's get started...");
        uiMethods.PressEnter();

        uiMethods.DisplayTitle("ChatSFN");

        var isDone = false;
        var response = new GetActivityTaskResponse();
        var taskToken = string.Empty;
        var userChoice = string.Empty;

        while (!isDone)
        {
            response = await stepFunctionsWrapper.GetActivityTaskAsync(activityArn, "MvpWorker");
            taskToken = response.TaskToken;

            // Parse the returned JSON string.
            var taskJsonResponse = JsonDocument.Parse(response.Input);
            var taskJsonObject = taskJsonResponse.RootElement;
            var message = taskJsonObject.GetProperty("message").GetString();
            var actions = taskJsonObject.GetProperty("actions").EnumerateArray().Select(x => x.ToString()).ToList();
            Console.WriteLine($"\n{message}\n");

            // Prompt the user for another choice.
            Console.WriteLine("ChatSFN: What would you like me to do?");
            actions.ForEach(action => Console.WriteLine($"\t{action}"));
            Console.Write($"\n{userName}, tell me your choice: ");
            userChoice = Console.ReadLine();
            if (userChoice?.ToLower() == "done")
            {
                isDone = true;
            }

            Console.WriteLine($"You have selected: {userChoice}");
            var jsonResponse = @"{""action"": """ + userChoice + @"""}";

            await stepFunctionsWrapper.SendTaskSuccessAsync(taskToken, jsonResponse);
        }

        await stepFunctionsWrapper.StopExecution(executionArn);
        Console.WriteLine("Now we will wait for the execution to stop.");
        DescribeExecutionResponse executionResponse;
        do
        {
            executionResponse = await stepFunctionsWrapper.DescribeExecutionAsync(executionArn);
        } while (executionResponse.Status == ExecutionStatus.RUNNING);

        Console.WriteLine("State machine stopped.");
        uiMethods.PressEnter();

        uiMethods.DisplayTitle("State machine executions");
        Console.WriteLine("Now let's take a look at the execution values for the state machine.");

        // List the executions.
        var executions = await stepFunctionsWrapper.ListExecutionsAsync(stateMachineArn);

        uiMethods.DisplayTitle("Step function execution values");
        executions.ForEach(execution =>
        {
            Console.WriteLine($"{execution.Name}\t{execution.StartDate} to {execution.StopDate}");
        });

        uiMethods.PressEnter();

        // Now delete the state machine and the activity.
        uiMethods.DisplayTitle("Clean up resources");
        Console.WriteLine("Deleting the state machine...");

        await stepFunctionsWrapper.DeleteStateMachine(stateMachineArn);
        Console.WriteLine("State machine deleted.");

        Console.WriteLine("Deleting the activity...");
        await stepFunctionsWrapper.DeleteActivity(activityArn);
        Console.WriteLine("Activity deleted.");

        Console.WriteLine("The Amazon Step Functions scenario is now complete.");
    }

    static async Task<Role> GetOrCreateStateMachineRole(string roleName)
    {
        // Define the policy document for the role.
        var stateMachineRolePolicy = @"{
         ""Version"": ""2012-10-17"",
        ""Statement"": [{
            ""Sid"": """",
            ""Effect"": ""Allow"",
            ""Principal"": {
                ""Service"": ""states.amazonaws.com""},
            ""Action"": ""sts:AssumeRole""}]}";

        var role = new Role();
        var roleExists = false;

        try
        {
            var getRoleResponse = await _iamService.GetRoleAsync(new GetRoleRequest { RoleName = roleName });
            roleExists = true;
            role = getRoleResponse.Role;
        }
        catch (NoSuchEntityException)
        {
            // The role doesn't exist. Create it.
            Console.WriteLine($"Role, {roleName} doesn't exist. Creating it...");
        }

        if (!roleExists)
        {
            var request = new CreateRoleRequest
            {
                RoleName = roleName,
                AssumeRolePolicyDocument = stateMachineRolePolicy,
            };

            var createRoleResponse = await _iamService.CreateRoleAsync(request);
            role = createRoleResponse.Role;
        }

        return role;
    }
}


namespace StepFunctionsBasics;

/// <summary>
/// Some useful methods to make screen display easier.
/// </summary>
public class UiMethods
{
    private readonly string _sepBar = new('-', Console.WindowWidth);

    /// <summary>
    /// Show information about the scenario.
    /// </summary>
    public void DisplayOverview()
    {
        Console.Clear();
        DisplayTitle("Welcome to the AWS Step Functions Demo");

        Console.WriteLine("This example application will do the following:");
        Console.WriteLine("\t 1. Create an activity.");
        Console.WriteLine("\t 2. Create a state machine.");
        Console.WriteLine("\t 3. Start an execution.");
        Console.WriteLine("\t 4. Run the worker, then stop it.");
        Console.WriteLine("\t 5. List executions.");
        Console.WriteLine("\t 6. Clean up the resources created for the example.");
    }

    /// <summary>
    /// Display a message and wait until the user presses enter.
    /// </summary>
    public void PressEnter()
    {
        Console.Write("\nPress <Enter> to continue.");
        _ = Console.ReadLine();
    }

    /// <summary>
    /// Pad a string with spaces to center it on the console display.
    /// </summary>
    /// <param name="strToCenter"></param>
    /// <returns></returns>
    private string CenterString(string strToCenter)
    {
        var padAmount = (Console.WindowWidth - strToCenter.Length) / 2;
        var leftPad = new string(' ', padAmount);
        return $"{leftPad}{strToCenter}";
    }

    /// <summary>
    /// Display a line of hyphens, the centered text of the title, and another
    /// line of hyphens.
    /// </summary>
    /// <param name="strTitle">The string to be displayed.</param>
    public void DisplayTitle(string strTitle)
    {
        Console.WriteLine(_sepBar);
        Console.WriteLine(CenterString(strTitle));
        Console.WriteLine(_sepBar);
    }
}
```
定義包裝狀態機器和活動動作的類別。  

```
namespace StepFunctionsActions;

using Amazon.StepFunctions;
using Amazon.StepFunctions.Model;

/// <summary>
/// Wrapper that performs AWS Step Functions actions.
/// </summary>
public class StepFunctionsWrapper
{
    private readonly IAmazonStepFunctions _amazonStepFunctions;

    /// <summary>
    /// The constructor for the StepFunctionsWrapper. Initializes the
    /// client object passed to it.
    /// </summary>
    /// <param name="amazonStepFunctions">An initialized Step Functions client object.</param>
    public StepFunctionsWrapper(IAmazonStepFunctions amazonStepFunctions)
    {
        _amazonStepFunctions = amazonStepFunctions;
    }

    /// <summary>
    /// Create a Step Functions activity using the supplied name.
    /// </summary>
    /// <param name="activityName">The name for the new Step Functions activity.</param>
    /// <returns>The Amazon Resource Name (ARN) for the new activity.</returns>
    public async Task<string> CreateActivity(string activityName)
    {
        var response = await _amazonStepFunctions.CreateActivityAsync(new CreateActivityRequest { Name = activityName });
        return response.ActivityArn;
    }


    /// <summary>
    /// Create a Step Functions state machine.
    /// </summary>
    /// <param name="stateMachineName">Name for the new Step Functions state
    /// machine.</param>
    /// <param name="definition">A JSON string that defines the Step Functions
    /// state machine.</param>
    /// <param name="roleArn">The Amazon Resource Name (ARN) of the role.</param>
    /// <returns></returns>
    public async Task<string> CreateStateMachine(string stateMachineName, string definition, string roleArn)
    {
        var request = new CreateStateMachineRequest
        {
            Name = stateMachineName,
            Definition = definition,
            RoleArn = roleArn
        };

        var response =
            await _amazonStepFunctions.CreateStateMachineAsync(request);
        return response.StateMachineArn;
    }


    /// <summary>
    /// Delete a Step Machine activity.
    /// </summary>
    /// <param name="activityArn">The Amazon Resource Name (ARN) of
    /// the activity.</param>
    /// <returns>A Boolean value indicating the success of the action.</returns>
    public async Task<bool> DeleteActivity(string activityArn)
    {
        var response = await _amazonStepFunctions.DeleteActivityAsync(new DeleteActivityRequest { ActivityArn = activityArn });
        return response.HttpStatusCode == System.Net.HttpStatusCode.OK;
    }


    /// <summary>
    /// Delete a Step Functions state machine.
    /// </summary>
    /// <param name="stateMachineArn">The Amazon Resource Name (ARN) of the
    /// state machine.</param>
    /// <returns>A Boolean value indicating the success of the action.</returns>
    public async Task<bool> DeleteStateMachine(string stateMachineArn)
    {
        var response = await _amazonStepFunctions.DeleteStateMachineAsync(new DeleteStateMachineRequest
        { StateMachineArn = stateMachineArn });
        return response.HttpStatusCode == System.Net.HttpStatusCode.OK;
    }


    /// <summary>
    /// Retrieve information about the specified Step Functions execution.
    /// </summary>
    /// <param name="executionArn">The Amazon Resource Name (ARN) of the
    /// Step Functions execution.</param>
    /// <returns>The API response returned by the API.</returns>
    public async Task<DescribeExecutionResponse> DescribeExecutionAsync(string executionArn)
    {
        var response = await _amazonStepFunctions.DescribeExecutionAsync(new DescribeExecutionRequest { ExecutionArn = executionArn });
        return response;
    }


    /// <summary>
    /// Retrieve information about the specified Step Functions state machine.
    /// </summary>
    /// <param name="StateMachineArn">The Amazon Resource Name (ARN) of the
    /// Step Functions state machine to retrieve.</param>
    /// <returns>Information about the specified Step Functions state machine.</returns>
    public async Task<DescribeStateMachineResponse> DescribeStateMachineAsync(string StateMachineArn)
    {
        var response = await _amazonStepFunctions.DescribeStateMachineAsync(new DescribeStateMachineRequest { StateMachineArn = StateMachineArn });
        return response;
    }


    /// <summary>
    /// Retrieve a task with the specified Step Functions activity
    /// with the specified Amazon Resource Name (ARN).
    /// </summary>
    /// <param name="activityArn">The Amazon Resource Name (ARN) of
    /// the Step Functions activity.</param>
    /// <param name="workerName">The name of the Step Functions worker.</param>
    /// <returns>The response from the Step Functions activity.</returns>
    public async Task<GetActivityTaskResponse> GetActivityTaskAsync(string activityArn, string workerName)
    {
        var response = await _amazonStepFunctions.GetActivityTaskAsync(new GetActivityTaskRequest
        { ActivityArn = activityArn, WorkerName = workerName });
        return response;
    }


    /// <summary>
    /// List the Step Functions activities for the current account.
    /// </summary>
    /// <returns>A list of ActivityListItems.</returns>
    public async Task<List<ActivityListItem>> ListActivitiesAsync()
    {
        var request = new ListActivitiesRequest();
        var activities = new List<ActivityListItem>();

        do
        {
            var response = await _amazonStepFunctions.ListActivitiesAsync(request);

            if (response.NextToken is not null)
            {
                request.NextToken = response.NextToken;
            }

            activities.AddRange(response.Activities);
        }
        while (request.NextToken is not null);

        return activities;
    }


    /// <summary>
    /// Retrieve information about executions of a Step Functions
    /// state machine.
    /// </summary>
    /// <param name="stateMachineArn">The Amazon Resource Name (ARN) of the
    /// Step Functions state machine.</param>
    /// <returns>A list of ExecutionListItem objects.</returns>
    public async Task<List<ExecutionListItem>> ListExecutionsAsync(string stateMachineArn)
    {
        var executions = new List<ExecutionListItem>();
        ListExecutionsResponse response;
        var request = new ListExecutionsRequest { StateMachineArn = stateMachineArn };

        do
        {
            response = await _amazonStepFunctions.ListExecutionsAsync(request);
            executions.AddRange(response.Executions);
            if (response.NextToken is not null)
            {
                request.NextToken = response.NextToken;
            }
        } while (response.NextToken is not null);

        return executions;
    }


    /// <summary>
    /// Retrieve a list of Step Functions state machines.
    /// </summary>
    /// <returns>A list of StateMachineListItem objects.</returns>
    public async Task<List<StateMachineListItem>> ListStateMachinesAsync()
    {
        var stateMachines = new List<StateMachineListItem>();
        var listStateMachinesPaginator =
            _amazonStepFunctions.Paginators.ListStateMachines(new ListStateMachinesRequest());

        await foreach (var response in listStateMachinesPaginator.Responses)
        {
            stateMachines.AddRange(response.StateMachines);
        }

        return stateMachines;
    }


    /// <summary>
    /// Indicate that the Step Functions task, indicated by the
    /// task token, has completed successfully.
    /// </summary>
    /// <param name="taskToken">Identifies the task.</param>
    /// <param name="taskResponse">The response received from executing the task.</param>
    /// <returns>A Boolean value indicating the success of the action.</returns>
    public async Task<bool> SendTaskSuccessAsync(string taskToken, string taskResponse)
    {
        var response = await _amazonStepFunctions.SendTaskSuccessAsync(new SendTaskSuccessRequest
        { TaskToken = taskToken, Output = taskResponse });

        return response.HttpStatusCode == System.Net.HttpStatusCode.OK;
    }


    /// <summary>
    /// Start execution of an AWS Step Functions state machine.
    /// </summary>
    /// <param name="executionName">The name to use for the execution.</param>
    /// <param name="executionJson">The JSON string to pass for execution.</param>
    /// <param name="stateMachineArn">The Amazon Resource Name (ARN) of the
    /// Step Functions state machine.</param>
    /// <returns>The Amazon Resource Name (ARN) of the AWS Step Functions
    /// execution.</returns>
    public async Task<string> StartExecutionAsync(string executionJson, string stateMachineArn)
    {
        var executionRequest = new StartExecutionRequest
        {
            Input = executionJson,
            StateMachineArn = stateMachineArn
        };

        var response = await _amazonStepFunctions.StartExecutionAsync(executionRequest);
        return response.ExecutionArn;
    }


    /// <summary>
    /// Stop execution of a Step Functions workflow.
    /// </summary>
    /// <param name="executionArn">The Amazon Resource Name (ARN) of
    /// the Step Functions execution to stop.</param>
    /// <returns>A Boolean value indicating the success of the action.</returns>
    public async Task<bool> StopExecution(string executionArn)
    {
        var response =
            await _amazonStepFunctions.StopExecutionAsync(new StopExecutionRequest { ExecutionArn = executionArn });
        return response.HttpStatusCode == System.Net.HttpStatusCode.OK;
    }


}
```
+ 如需 API 詳細資訊，請參閱《*適用於 .NET 的 AWS SDK API 參考*》中的下列主題。
  + [CreateActivity](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/CreateActivity)
  + [CreateStateMachine](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/CreateStateMachine)
  + [DeleteActivity](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/DeleteActivity)
  + [DeleteStateMachine](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/DeleteStateMachine)
  + [DescribeExecution](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/DescribeExecution)
  + [DescribeStateMachine](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/DescribeStateMachine)
  + [GetActivityTask](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/GetActivityTask)
  + [ListActivities](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/ListActivities)
  + [ListStateMachines](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/ListStateMachines)
  + [SendTaskSuccess](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/SendTaskSuccess)
  + [StartExecution](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/StartExecution)
  + [StopExecution](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/StopExecution)

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。

```
/**
 * You can obtain the JSON file to create a state machine in the following
 * GitHub location.
 * <p>
 * https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/resources/sample_files
 * <p>
 * To run this code example, place the chat_sfn_state_machine.json file into
 * your project's resources folder.
 * <p>
 * Also, set up your development environment, including your credentials.
 * <p>
 * For information, see this documentation topic:
 * <p>
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 * <p>
 * This Java code example performs the following tasks:
 * <p>
 * 1. Creates an activity.
 * 2. Creates a state machine.
 * 3. Describes the state machine.
 * 4. Starts execution of the state machine and interacts with it.
 * 5. Describes the execution.
 * 6. Delete the activity.
 * 7. Deletes the state machine.
 */
public class StepFunctionsScenario {
    public static final String DASHES = new String(new char[80]).replace("\0", "-");

    public static void main(String[] args) throws Exception {
        final String usage = """

            Usage:
                <roleARN> <activityName> <stateMachineName>

            Where:
                roleName - The name of the IAM role to create for this state machine.
                activityName - The name of an activity to create.
                stateMachineName - The name of the state machine to create.
                jsonFile - The location of the chat_sfn_state_machine.json file. You can located it in resources/sample_files. 
            """;

        if (args.length != 4) {
            System.out.println(usage);
            System.exit(1);
        }

        String roleName = args[0];
        String activityName = args[1];
        String stateMachineName = args[2];
        String jsonFile = args[3];
        String polJSON = """
            {
                "Version":"2012-10-17",		 	 	 
                "Statement": [
                    {
                        "Sid": "",
                        "Effect": "Allow",
                        "Principal": {
                            "Service": "states.amazonaws.com"
                        },
                        "Action": "sts:AssumeRole"
                    }
                ]
            }
            """;


        Scanner sc = new Scanner(System.in);
        boolean action = false;

        Region region = Region.US_EAST_1;
        SfnClient sfnClient = SfnClient.builder()
            .region(region)
            .build();

        Region regionGl = Region.AWS_GLOBAL;
        IamClient iam = IamClient.builder()
            .region(regionGl)
            .build();

        System.out.println(DASHES);
        System.out.println("Welcome to the AWS Step Functions example scenario.");
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("1. Create an activity.");
        String activityArn = createActivity(sfnClient, activityName);
        System.out.println("The ARN of the activity is " + activityArn);
        System.out.println(DASHES);

        // Read the file using FileInputStream
        FileInputStream inputStream = new FileInputStream(jsonFile);
        ObjectMapper mapper = new ObjectMapper();
        JsonNode jsonNode = mapper.readValue(inputStream, JsonNode.class);
        String jsonString = mapper.writeValueAsString(jsonNode);

        // Modify the Resource node.
        ObjectMapper objectMapper = new ObjectMapper();
        JsonNode root = objectMapper.readTree(jsonString);
        ((ObjectNode) root.path("States").path("GetInput")).put("Resource", activityArn);

        // Convert the modified Java object back to a JSON string.
        String stateDefinition = objectMapper.writeValueAsString(root);
        System.out.println(stateDefinition);

        System.out.println(DASHES);
        System.out.println("2. Create a state machine.");
        String roleARN = createIAMRole(iam, roleName, polJSON);
        String stateMachineArn = createMachine(sfnClient, roleARN, stateMachineName, stateDefinition);
        System.out.println("The ARN of the state machine is " + stateMachineArn);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("3. Describe the state machine.");
        describeStateMachine(sfnClient, stateMachineArn);
        System.out.println("What should ChatSFN call you?");
        String userName = sc.nextLine();
        System.out.println("Hello " + userName);
        System.out.println(DASHES);

        System.out.println(DASHES);
        // The JSON to pass to the StartExecution call.
        String executionJson = "{ \"name\" : \"" + userName + "\" }";
        System.out.println(executionJson);
        System.out.println("4. Start execution of the state machine and interact with it.");
        String runArn = startWorkflow(sfnClient, stateMachineArn, executionJson);
        System.out.println("The ARN of the state machine execution is " + runArn);
        List<String> myList;
        while (!action) {
            myList = getActivityTask(sfnClient, activityArn);
            System.out.println("ChatSFN: " + myList.get(1));
            System.out.println(userName + " please specify a value.");
            String myAction = sc.nextLine();
            if (myAction.compareTo("done") == 0)
                action = true;

            System.out.println("You have selected " + myAction);
            String taskJson = "{ \"action\" : \"" + myAction + "\" }";
            System.out.println(taskJson);
            sendTaskSuccess(sfnClient, myList.get(0), taskJson);
        }
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("5. Describe the execution.");
        describeExe(sfnClient, runArn);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("6. Delete the activity.");
        deleteActivity(sfnClient, activityArn);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("7. Delete the state machines.");
        deleteMachine(sfnClient, stateMachineArn);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("The AWS Step Functions example scenario is complete.");
        System.out.println(DASHES);
    }

    public static String createIAMRole(IamClient iam, String rolename, String polJSON) {
        try {
            CreateRoleRequest request = CreateRoleRequest.builder()
                .roleName(rolename)
                .assumeRolePolicyDocument(polJSON)
                .description("Created using the AWS SDK for Java")
                .build();

            CreateRoleResponse response = iam.createRole(request);
            return response.role().arn();

        } catch (IamException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }

    public static void describeExe(SfnClient sfnClient, String executionArn) {
        try {
            DescribeExecutionRequest executionRequest = DescribeExecutionRequest.builder()
                .executionArn(executionArn)
                .build();

            String status = "";
            boolean hasSucceeded = false;
            while (!hasSucceeded) {
                DescribeExecutionResponse response = sfnClient.describeExecution(executionRequest);
                status = response.statusAsString();
                if (status.compareTo("RUNNING") == 0) {
                    System.out.println("The state machine is still running, let's wait for it to finish.");
                    Thread.sleep(2000);
                } else if (status.compareTo("SUCCEEDED") == 0) {
                    System.out.println("The Step Function workflow has succeeded");
                    hasSucceeded = true;
                } else {
                    System.out.println("The Status is neither running or succeeded");
                }
            }
            System.out.println("The Status is " + status);

        } catch (SfnException | InterruptedException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
    }

    public static void sendTaskSuccess(SfnClient sfnClient, String token, String json) {
        try {
            SendTaskSuccessRequest successRequest = SendTaskSuccessRequest.builder()
                .taskToken(token)
                .output(json)
                .build();

            sfnClient.sendTaskSuccess(successRequest);

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    public static List<String> getActivityTask(SfnClient sfnClient, String actArn) {
        List<String> myList = new ArrayList<>();
        GetActivityTaskRequest getActivityTaskRequest = GetActivityTaskRequest.builder()
            .activityArn(actArn)
            .build();

        GetActivityTaskResponse response = sfnClient.getActivityTask(getActivityTaskRequest);
        myList.add(response.taskToken());
        myList.add(response.input());
        return myList;
    }

    public static void deleteActivity(SfnClient sfnClient, String actArn) {
        try {
            DeleteActivityRequest activityRequest = DeleteActivityRequest.builder()
                .activityArn(actArn)
                .build();

            sfnClient.deleteActivity(activityRequest);
            System.out.println("You have deleted " + actArn);

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    public static void describeStateMachine(SfnClient sfnClient, String stateMachineArn) {
        try {
            DescribeStateMachineRequest stateMachineRequest = DescribeStateMachineRequest.builder()
                .stateMachineArn(stateMachineArn)
                .build();

            DescribeStateMachineResponse response = sfnClient.describeStateMachine(stateMachineRequest);
            System.out.println("The name of the State machine is " + response.name());
            System.out.println("The status of the State machine is " + response.status());
            System.out.println("The ARN value of the State machine is " + response.stateMachineArn());
            System.out.println("The role ARN value is " + response.roleArn());

        } catch (SfnException e) {
            System.err.println(e.getMessage());
        }
    }

    public static void deleteMachine(SfnClient sfnClient, String stateMachineArn) {
        try {
            DeleteStateMachineRequest deleteStateMachineRequest = DeleteStateMachineRequest.builder()
                .stateMachineArn(stateMachineArn)
                .build();

            sfnClient.deleteStateMachine(deleteStateMachineRequest);
            DescribeStateMachineRequest describeStateMachine = DescribeStateMachineRequest.builder()
                .stateMachineArn(stateMachineArn)
                .build();

            while (true) {
                DescribeStateMachineResponse response = sfnClient.describeStateMachine(describeStateMachine);
                System.out.println("The state machine is not deleted yet. The status is " + response.status());
                Thread.sleep(3000);
            }

        } catch (SfnException | InterruptedException e) {
            System.err.println(e.getMessage());
        }
        System.out.println(stateMachineArn + " was successfully deleted.");
    }

    public static String startWorkflow(SfnClient sfnClient, String stateMachineArn, String jsonEx) {
        UUID uuid = UUID.randomUUID();
        String uuidValue = uuid.toString();
        try {
            StartExecutionRequest executionRequest = StartExecutionRequest.builder()
                .input(jsonEx)
                .stateMachineArn(stateMachineArn)
                .name(uuidValue)
                .build();

            StartExecutionResponse response = sfnClient.startExecution(executionRequest);
            return response.executionArn();

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }

    public static String createMachine(SfnClient sfnClient, String roleARN, String stateMachineName, String json) {
        try {
            CreateStateMachineRequest machineRequest = CreateStateMachineRequest.builder()
                .definition(json)
                .name(stateMachineName)
                .roleArn(roleARN)
                .type(StateMachineType.STANDARD)
                .build();

            CreateStateMachineResponse response = sfnClient.createStateMachine(machineRequest);
            return response.stateMachineArn();

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }

    public static String createActivity(SfnClient sfnClient, String activityName) {
        try {
            CreateActivityRequest activityRequest = CreateActivityRequest.builder()
                .name(activityName)
                .build();

            CreateActivityResponse response = sfnClient.createActivity(activityRequest);
            return response.activityArn();

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }
}
```
+ 如需 API 詳細資訊，請參閱《*AWS SDK for Java 2.x API 參考*》中的下列主題。
  + [CreateActivity](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/CreateActivity)
  + [CreateStateMachine](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/CreateStateMachine)
  + [DeleteActivity](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/DeleteActivity)
  + [DeleteStateMachine](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/DeleteStateMachine)
  + [DescribeExecution](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/DescribeExecution)
  + [DescribeStateMachine](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/DescribeStateMachine)
  + [GetActivityTask](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/GetActivityTask)
  + [ListActivities](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/ListActivities)
  + [ListStateMachines](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/ListStateMachines)
  + [SendTaskSuccess](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/SendTaskSuccess)
  + [StartExecution](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/StartExecution)
  + [StopExecution](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/StopExecution)

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
import aws.sdk.kotlin.services.iam.IamClient
import aws.sdk.kotlin.services.iam.model.CreateRoleRequest
import aws.sdk.kotlin.services.sfn.SfnClient
import aws.sdk.kotlin.services.sfn.model.CreateActivityRequest
import aws.sdk.kotlin.services.sfn.model.CreateStateMachineRequest
import aws.sdk.kotlin.services.sfn.model.DeleteActivityRequest
import aws.sdk.kotlin.services.sfn.model.DeleteStateMachineRequest
import aws.sdk.kotlin.services.sfn.model.DescribeExecutionRequest
import aws.sdk.kotlin.services.sfn.model.DescribeStateMachineRequest
import aws.sdk.kotlin.services.sfn.model.GetActivityTaskRequest
import aws.sdk.kotlin.services.sfn.model.ListActivitiesRequest
import aws.sdk.kotlin.services.sfn.model.ListStateMachinesRequest
import aws.sdk.kotlin.services.sfn.model.SendTaskSuccessRequest
import aws.sdk.kotlin.services.sfn.model.StartExecutionRequest
import aws.sdk.kotlin.services.sfn.model.StateMachineType
import aws.sdk.kotlin.services.sfn.paginators.listActivitiesPaginated
import aws.sdk.kotlin.services.sfn.paginators.listStateMachinesPaginated
import com.fasterxml.jackson.databind.JsonNode
import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.databind.node.ObjectNode
import kotlinx.coroutines.flow.transform
import java.util.Scanner
import java.util.UUID
import kotlin.collections.ArrayList
import kotlin.system.exitProcess

/**
 To run this code example, place the chat_sfn_state_machine.json file into your project's resources folder.

 You can obtain the JSON file to create a state machine in the following GitHub location:

 https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/resources/sample_files

 Before running this Kotlin code example, set up your development environment,
 including your credentials.

 For more information, see the following documentation topic:
 https://docs.aws.amazon.com/sdk-for-kotlin/latest/developer-guide/setup.html

 This Kotlin code example performs the following tasks:

 1. List activities using a paginator.
 2. List state machines using a paginator.
 3. Creates an activity.
 4. Creates a state machine.
 5. Describes the state machine.
 6. Starts execution of the state machine and interacts with it.
 7. Describes the execution.
 8. Deletes the activity.
 9. Deletes the state machine.
 */

val DASHES: String = String(CharArray(80)).replace("\u0000", "-")

suspend fun main(args: Array<String>) {
    val usage = """
    Usage:
        <roleARN> <activityName> <stateMachineName>

    Where:
        roleName - The name of the IAM role to create for this state machine.
        activityName - The name of an activity to create.    
        stateMachineName - The name of the state machine to create.
        jsonFile - The location of the chat_sfn_state_machine.json file. You can located it in resources/sample_files. 
    """

    if (args.size != 4) {
        println(usage)
        exitProcess(0)
    }

    val roleName = args[0]
    val activityName = args[1]
    val stateMachineName = args[2]
    val jsonFile = args[3]
    val sc = Scanner(System.`in`)
    var action = false

    val polJSON = """{
    "Version":"2012-10-17",		 	 	 
    "Statement": [
        {
            "Sid": "",
            "Effect": "Allow",
            "Principal": {
                "Service": "states.amazonaws.com"
            },
            "Action": "sts:AssumeRole"
        }
    ]
    }"""

    println(DASHES)
    println("Welcome to the AWS Step Functions example scenario.")
    println(DASHES)

    println(DASHES)
    println("1. List activities using a Paginator.")
    listActivitesPagnator()
    println(DASHES)

    println(DASHES)
    println("2. List state machines using a paginator.")
    listStatemachinesPagnator()
    println(DASHES)

    println(DASHES)
    println("3. Create a new activity.")
    val activityArn = createActivity(activityName)
    println("The ARN of the Activity is $activityArn")
    println(DASHES)

    // Get JSON to use for the state machine and place the activityArn value into it.
    val stream = GetStream()
    val jsonString = stream.getStream(jsonFile)

    // Modify the Resource node.
    val objectMapper = ObjectMapper()
    val root: JsonNode = objectMapper.readTree(jsonString)
    (root.path("States").path("GetInput") as ObjectNode).put("Resource", activityArn)

    // Convert the modified Java object back to a JSON string.
    val stateDefinition = objectMapper.writeValueAsString(root)
    println(stateDefinition)

    println(DASHES)
    println("4. Create a state machine.")
    val roleARN = createIAMRole(roleName, polJSON)
    val stateMachineArn = createMachine(roleARN, stateMachineName, stateDefinition)
    println("The ARN of the state machine is $stateMachineArn")
    println(DASHES)

    println(DASHES)
    println("5. Describe the state machine.")
    describeStateMachine(stateMachineArn)
    println("What should ChatSFN call you?")
    val userName = sc.nextLine()
    println("Hello $userName")
    println(DASHES)

    println(DASHES)
    // The JSON to pass to the StartExecution call.
    val executionJson = "{ \"name\" : \"$userName\" }"
    println(executionJson)
    println("6. Start execution of the state machine and interact with it.")
    val runArn = startWorkflow(stateMachineArn, executionJson)
    println("The ARN of the state machine execution is $runArn")
    var myList: List<String>
    while (!action) {
        myList = getActivityTask(activityArn)
        println("ChatSFN: " + myList[1])
        println("$userName please specify a value.")
        val myAction = sc.nextLine()
        if (myAction.compareTo("done") == 0) {
            action = true
        }
        println("You have selected $myAction")
        val taskJson = "{ \"action\" : \"$myAction\" }"
        println(taskJson)
        sendTaskSuccess(myList[0], taskJson)
    }
    println(DASHES)

    println(DASHES)
    println("7. Describe the execution.")
    describeExe(runArn)
    println(DASHES)

    println(DASHES)
    println("8. Delete the activity.")
    deleteActivity(activityArn)
    println(DASHES)

    println(DASHES)
    println("9. Delete the state machines.")
    deleteMachine(stateMachineArn)
    println(DASHES)

    println(DASHES)
    println("The AWS Step Functions example scenario is complete.")
    println(DASHES)
}

suspend fun listStatemachinesPagnator() {
    val machineRequest =
        ListStateMachinesRequest {
            maxResults = 10
        }

    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        sfnClient
            .listStateMachinesPaginated(machineRequest)
            .transform { it.stateMachines?.forEach { obj -> emit(obj) } }
            .collect { obj ->
                println(" The state machine ARN is ${obj.stateMachineArn}")
            }
    }
}

suspend fun listActivitesPagnator() {
    val activitiesRequest =
        ListActivitiesRequest {
            maxResults = 10
        }

    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        sfnClient
            .listActivitiesPaginated(activitiesRequest)
            .transform { it.activities?.forEach { obj -> emit(obj) } }
            .collect { obj ->
                println(" The activity ARN is ${obj.activityArn}")
            }
    }
}

suspend fun deleteMachine(stateMachineArnVal: String?) {
    val deleteStateMachineRequest =
        DeleteStateMachineRequest {
            stateMachineArn = stateMachineArnVal
        }

    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        sfnClient.deleteStateMachine(deleteStateMachineRequest)
        println("$stateMachineArnVal was successfully deleted.")
    }
}

suspend fun deleteActivity(actArn: String?) {
    val activityRequest =
        DeleteActivityRequest {
            activityArn = actArn
        }

    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        sfnClient.deleteActivity(activityRequest)
        println("You have deleted $actArn")
    }
}

suspend fun describeExe(executionArnVal: String?) {
    val executionRequest =
        DescribeExecutionRequest {
            executionArn = executionArnVal
        }

    var status = ""
    var hasSucceeded = false
    while (!hasSucceeded) {
        SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
            val response = sfnClient.describeExecution(executionRequest)
            status = response.status.toString()
            if (status.compareTo("Running") == 0) {
                println("The state machine is still running, let's wait for it to finish.")
                Thread.sleep(2000)
            } else if (status.compareTo("Succeeded") == 0) {
                println("The Step Function workflow has succeeded")
                hasSucceeded = true
            } else {
                println("The Status is $status")
            }
        }
    }
    println("The Status is $status")
}

suspend fun sendTaskSuccess(
    token: String?,
    json: String?,
) {
    val successRequest =
        SendTaskSuccessRequest {
            taskToken = token
            output = json
        }
    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        sfnClient.sendTaskSuccess(successRequest)
    }
}

suspend fun getActivityTask(actArn: String?): List<String> {
    val myList: MutableList<String> = ArrayList()
    val getActivityTaskRequest =
        GetActivityTaskRequest {
            activityArn = actArn
        }
    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.getActivityTask(getActivityTaskRequest)
        myList.add(response.taskToken.toString())
        myList.add(response.input.toString())
        return myList
    }
}

suspend fun startWorkflow(
    stateMachineArnVal: String?,
    jsonEx: String?,
): String? {
    val uuid = UUID.randomUUID()
    val uuidValue = uuid.toString()
    val executionRequest =
        StartExecutionRequest {
            input = jsonEx
            stateMachineArn = stateMachineArnVal
            name = uuidValue
        }
    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.startExecution(executionRequest)
        return response.executionArn
    }
}

suspend fun describeStateMachine(stateMachineArnVal: String?) {
    val stateMachineRequest =
        DescribeStateMachineRequest {
            stateMachineArn = stateMachineArnVal
        }
    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.describeStateMachine(stateMachineRequest)
        println("The name of the State machine is ${response.name}")
        println("The status of the State machine is ${response.status}")
        println("The ARN value of the State machine is ${response.stateMachineArn}")
        println("The role ARN value is ${response.roleArn}")
    }
}

suspend fun createMachine(
    roleARNVal: String?,
    stateMachineName: String?,
    jsonVal: String?,
): String? {
    val machineRequest =
        CreateStateMachineRequest {
            definition = jsonVal
            name = stateMachineName
            roleArn = roleARNVal
            type = StateMachineType.Standard
        }

    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.createStateMachine(machineRequest)
        return response.stateMachineArn
    }
}

suspend fun createIAMRole(
    roleNameVal: String?,
    polJSON: String?,
): String? {
    val request =
        CreateRoleRequest {
            roleName = roleNameVal
            assumeRolePolicyDocument = polJSON
            description = "Created using the AWS SDK for Kotlin"
        }

    IamClient.fromEnvironment { region = "AWS_GLOBAL" }.use { iamClient ->
        val response = iamClient.createRole(request)
        return response.role?.arn
    }
}

suspend fun createActivity(activityName: String): String? {
    val activityRequest =
        CreateActivityRequest {
            name = activityName
        }

    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.createActivity(activityRequest)
        return response.activityArn
    }
}
```
+ 如需 API 詳細資訊，請參閱《*AWS SDK for Kotlin API 參考*》中的下列主題。
  + [CreateActivity](https://sdk.amazonaws.com/kotlin/api/latest/index.html)
  + [CreateStateMachine](https://sdk.amazonaws.com/kotlin/api/latest/index.html)
  + [DeleteActivity](https://sdk.amazonaws.com/kotlin/api/latest/index.html)
  + [DeleteStateMachine](https://sdk.amazonaws.com/kotlin/api/latest/index.html)
  + [DescribeExecution](https://sdk.amazonaws.com/kotlin/api/latest/index.html)
  + [DescribeStateMachine](https://sdk.amazonaws.com/kotlin/api/latest/index.html)
  + [GetActivityTask](https://sdk.amazonaws.com/kotlin/api/latest/index.html)
  + [ListActivities](https://sdk.amazonaws.com/kotlin/api/latest/index.html)
  + [ListStateMachines](https://sdk.amazonaws.com/kotlin/api/latest/index.html)
  + [SendTaskSuccess](https://sdk.amazonaws.com/kotlin/api/latest/index.html)
  + [StartExecution](https://sdk.amazonaws.com/kotlin/api/latest/index.html)
  + [StopExecution](https://sdk.amazonaws.com/kotlin/api/latest/index.html)

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/stepfunctions#code-examples)中設定和執行。
在命令提示中執行互動式案例。  

```
class StateMachineScenario:
    """Runs an interactive scenario that shows how to get started using Step Functions."""

    def __init__(self, activity, state_machine, iam_client):
        """
        :param activity: An object that wraps activity actions.
        :param state_machine: An object that wraps state machine actions.
        :param iam_client: A Boto3 AWS Identity and Access Management (IAM) client.
        """
        self.activity = activity
        self.state_machine = state_machine
        self.iam_client = iam_client
        self.state_machine_role = None

    def prerequisites(self, state_machine_role_name):
        """
        Finds or creates an IAM role that can be assumed by Step Functions.
        A role of this kind is required to create a state machine.
        The state machine used in this example does not call any additional services,
        so it needs no additional permissions.

        :param state_machine_role_name: The name of the role.
        :return: Data about the role.
        """
        trust_policy = {
            "Version":"2012-10-17",		 	 	 
            "Statement": [
                {
                    "Sid": "",
                    "Effect": "Allow",
                    "Principal": {"Service": "states.amazonaws.com"},
                    "Action": "sts:AssumeRole",
                }
            ],
        }
        try:
            role = self.iam_client.get_role(RoleName=state_machine_role_name)
            print(f"Prerequisite IAM role {state_machine_role_name} already exists.")
        except ClientError as err:
            if err.response["Error"]["Code"] == "NoSuchEntity":
                role = None
            else:
                logger.error(
                    "Couldn't get prerequisite IAM role %s. Here's why: %s: %s",
                    state_machine_role_name,
                    err.response["Error"]["Code"],
                    err.response["Error"]["Message"],
                )
                raise
        if role is None:
            try:
                role = self.iam_client.create_role(
                    RoleName=state_machine_role_name,
                    AssumeRolePolicyDocument=json.dumps(trust_policy),
                )
            except ClientError as err:
                logger.error(
                    "Couldn't create prerequisite IAM role %s. Here's why: %s: %s",
                    state_machine_role_name,
                    err.response["Error"]["Code"],
                    err.response["Error"]["Message"],
                )
                raise
        self.state_machine_role = role["Role"]

    def find_or_create_activity(self, activity_name):
        """
        Finds or creates a Step Functions activity.

        :param activity_name: The name of the activity.
        :return: The Amazon Resource Name (ARN) of the activity.
        """
        print("First, let's set up an activity and state machine.")
        activity_arn = self.activity.find(activity_name)
        if activity_arn is None:
            activity_arn = self.activity.create(activity_name)
            print(
                f"Activity {activity_name} created. Its Amazon Resource Name (ARN) is "
                f"{activity_arn}."
            )
        else:
            print(f"Activity {activity_name} already exists.")
        return activity_arn

    def find_or_create_state_machine(
        self, state_machine_name, activity_arn, state_machine_file
    ):
        """
        Finds or creates a Step Functions state machine.

        :param state_machine_name: The name of the state machine.
        :param activity_arn: The ARN of an activity that is used as a step in the state
                             machine. This ARN is injected into the state machine
                             definition that's used to create the state machine.
        :param state_machine_file: The path to a file containing the state machine
                                   definition.
        :return: The ARN of the state machine.
        """
        state_machine_arn = self.state_machine.find(state_machine_name)
        if state_machine_arn is None:
            with open(state_machine_file) as state_machine_file:
                state_machine_def = state_machine_file.read().replace(
                    "{{DOC_EXAMPLE_ACTIVITY_ARN}}", activity_arn
                )
                state_machine_arn = self.state_machine.create(
                    state_machine_name,
                    state_machine_def,
                    self.state_machine_role["Arn"],
                )
            print(f"State machine {state_machine_name} created.")
        else:
            print(f"State machine {state_machine_name} already exists.")
        print("-" * 88)
        print(f"Here's some information about state machine {state_machine_name}:")
        state_machine_info = self.state_machine.describe(state_machine_arn)
        for field in ["name", "status", "stateMachineArn", "roleArn"]:
            print(f"\t{field}: {state_machine_info[field]}")
        return state_machine_arn

    def run_state_machine(self, state_machine_arn, activity_arn):
        """
        Run the state machine. The state machine used in this example is a simple
        chat simulation. It contains an activity step in a loop that is used for user
        interaction. When the state machine gets to the activity step, it waits for
        an external application to get task data and submit a response. This function
        acts as the activity application by getting task input and responding with
        user input.

        :param state_machine_arn: The ARN of the state machine.
        :param activity_arn: The ARN of the activity used as a step in the state machine.
        :return: The ARN of the run.
        """
        print(
            f"Let's run the state machine. It's a simplistic, non-AI chat simulator "
            f"we'll call ChatSFN."
        )
        user_name = q.ask("What should ChatSFN call you? ", q.non_empty)
        run_input = {"name": user_name}
        print("Starting state machine...")
        run_arn = self.state_machine.start(state_machine_arn, json.dumps(run_input))
        action = None
        while action != "done":
            activity_task = self.activity.get_task(activity_arn)
            task_input = json.loads(activity_task["input"])
            print(f"ChatSFN: {task_input['message']}")
            action = task_input["actions"][
                q.choose("What now? ", task_input["actions"])
            ]
            task_response = {"action": action}
            self.activity.send_task_success(
                activity_task["taskToken"], json.dumps(task_response)
            )
        return run_arn

    def finish_state_machine_run(self, run_arn):
        """
        Wait for the state machine run to finish, then print final status and output.

        :param run_arn: The ARN of the run to retrieve.
        """
        print(f"Let's get the final output from the state machine:")
        status = "RUNNING"
        while status == "RUNNING":
            run_output = self.state_machine.describe_run(run_arn)
            status = run_output["status"]
            if status == "RUNNING":
                print(
                    "The state machine is still running, let's wait for it to finish."
                )
                wait(1)
            elif status == "SUCCEEDED":
                print(f"ChatSFN: {json.loads(run_output['output'])['message']}")
            else:
                print(f"Run status: {status}.")

    def cleanup(
        self,
        state_machine_name,
        state_machine_arn,
        activity_name,
        activity_arn,
        state_machine_role_name,
    ):
        """
        Clean up resources created by this example.

        :param state_machine_name: The name of the state machine.
        :param state_machine_arn: The ARN of the state machine.
        :param activity_name: The name of the activity.
        :param activity_arn: The ARN of the activity.
        :param state_machine_role_name: The name of the role used by the state machine.
        """
        if q.ask(
            "Do you want to delete the state machine, activity, and role created for this "
            "example? (y/n) ",
            q.is_yesno,
        ):
            self.state_machine.delete(state_machine_arn)
            print(f"Deleted state machine {state_machine_name}.")
            self.activity.delete(activity_arn)
            print(f"Deleted activity {activity_name}.")
            self.iam_client.delete_role(RoleName=state_machine_role_name)
            print(f"Deleted role {state_machine_role_name}.")

    def run_scenario(self, activity_name, state_machine_name):
        print("-" * 88)
        print("Welcome to the AWS Step Functions state machines demo.")
        print("-" * 88)

        activity_arn = self.find_or_create_activity(activity_name)
        state_machine_arn = self.find_or_create_state_machine(
            state_machine_name,
            activity_arn,
            "../../../resources/sample_files/chat_sfn_state_machine.json",
        )
        print("-" * 88)
        run_arn = self.run_state_machine(state_machine_arn, activity_arn)
        print("-" * 88)
        self.finish_state_machine_run(run_arn)
        print("-" * 88)
        self.cleanup(
            state_machine_name,
            state_machine_arn,
            activity_name,
            activity_arn,
            self.state_machine_role["RoleName"],
        )

        print("-" * 88)
        print("\nThanks for watching!")
        print("-" * 88)


if __name__ == "__main__":
    logging.basicConfig(level=logging.INFO, format="%(levelname)s: %(message)s")
    try:
        stepfunctions_client = boto3.client("stepfunctions")
        iam_client = boto3.client("iam")
        scenario = StateMachineScenario(
            Activity(stepfunctions_client),
            StateMachine(stepfunctions_client),
            iam_client,
        )
        scenario.prerequisites("doc-example-state-machine-chat")
        scenario.run_scenario("doc-example-activity", "doc-example-state-machine")
    except Exception:
        logging.exception("Something went wrong with the demo.")
```
定義包裝狀態機器動作的類別。  

```
class StateMachine:
    """Encapsulates Step Functions state machine actions."""

    def __init__(self, stepfunctions_client):
        """
        :param stepfunctions_client: A Boto3 Step Functions client.
        """
        self.stepfunctions_client = stepfunctions_client


    def create(self, name, definition, role_arn):
        """
        Creates a state machine with the specific definition. The state machine assumes
        the provided role before it starts a run.

        :param name: The name to give the state machine.
        :param definition: The Amazon States Language definition of the steps in the
                           the state machine.
        :param role_arn: The Amazon Resource Name (ARN) of the role that is assumed by
                         Step Functions when the state machine is run.
        :return: The ARN of the newly created state machine.
        """
        try:
            response = self.stepfunctions_client.create_state_machine(
                name=name, definition=definition, roleArn=role_arn
            )
        except ClientError as err:
            logger.error(
                "Couldn't create state machine %s. Here's why: %s: %s",
                name,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response["stateMachineArn"]


    def find(self, name):
        """
        Find a state machine by name. This requires listing the state machines until
        one is found with a matching name.

        :param name: The name of the state machine to search for.
        :return: The ARN of the state machine if found; otherwise, None.
        """
        try:
            paginator = self.stepfunctions_client.get_paginator("list_state_machines")
            for page in paginator.paginate():
                for state_machine in page.get("stateMachines", []):
                    if state_machine["name"] == name:
                        return state_machine["stateMachineArn"]
        except ClientError as err:
            logger.error(
                "Couldn't list state machines. Here's why: %s: %s",
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise


    def describe(self, state_machine_arn):
        """
        Get data about a state machine.

        :param state_machine_arn: The ARN of the state machine to look up.
        :return: The retrieved state machine data.
        """
        try:
            response = self.stepfunctions_client.describe_state_machine(
                stateMachineArn=state_machine_arn
            )
        except ClientError as err:
            logger.error(
                "Couldn't describe state machine %s. Here's why: %s: %s",
                state_machine_arn,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response


    def start(self, state_machine_arn, run_input):
        """
        Start a run of a state machine with a specified input. A run is also known
        as an "execution" in Step Functions.

        :param state_machine_arn: The ARN of the state machine to run.
        :param run_input: The input to the state machine, in JSON format.
        :return: The ARN of the run. This can be used to get information about the run,
                 including its current status and final output.
        """
        try:
            response = self.stepfunctions_client.start_execution(
                stateMachineArn=state_machine_arn, input=run_input
            )
        except ClientError as err:
            logger.error(
                "Couldn't start state machine %s. Here's why: %s: %s",
                state_machine_arn,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response["executionArn"]


    def describe_run(self, run_arn):
        """
        Get data about a state machine run, such as its current status or final output.

        :param run_arn: The ARN of the run to look up.
        :return: The retrieved run data.
        """
        try:
            response = self.stepfunctions_client.describe_execution(
                executionArn=run_arn
            )
        except ClientError as err:
            logger.error(
                "Couldn't describe run %s. Here's why: %s: %s",
                run_arn,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response


    def delete(self, state_machine_arn):
        """
        Delete a state machine and all of its run data.

        :param state_machine_arn: The ARN of the state machine to delete.
        """
        try:
            response = self.stepfunctions_client.delete_state_machine(
                stateMachineArn=state_machine_arn
            )
        except ClientError as err:
            logger.error(
                "Couldn't delete state machine %s. Here's why: %s: %s",
                state_machine_arn,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response
```
定義包裝活動動作的類別。  

```
class Activity:
    """Encapsulates Step Function activity actions."""

    def __init__(self, stepfunctions_client):
        """
        :param stepfunctions_client: A Boto3 Step Functions client.
        """
        self.stepfunctions_client = stepfunctions_client


    def create(self, name):
        """
        Create an activity.

        :param name: The name of the activity to create.
        :return: The Amazon Resource Name (ARN) of the newly created activity.
        """
        try:
            response = self.stepfunctions_client.create_activity(name=name)
        except ClientError as err:
            logger.error(
                "Couldn't create activity %s. Here's why: %s: %s",
                name,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response["activityArn"]


    def find(self, name):
        """
        Find an activity by name. This requires listing activities until one is found
        with a matching name.

        :param name: The name of the activity to search for.
        :return: If found, the ARN of the activity; otherwise, None.
        """
        try:
            paginator = self.stepfunctions_client.get_paginator("list_activities")
            for page in paginator.paginate():
                for activity in page.get("activities", []):
                    if activity["name"] == name:
                        return activity["activityArn"]
        except ClientError as err:
            logger.error(
                "Couldn't list activities. Here's why: %s: %s",
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise


    def get_task(self, activity_arn):
        """
        Gets task data for an activity. When a state machine is waiting for the
        specified activity, a response is returned with data from the state machine.
        When a state machine is not waiting, this call blocks for 60 seconds.

        :param activity_arn: The ARN of the activity to get task data for.
        :return: The task data for the activity.
        """
        try:
            response = self.stepfunctions_client.get_activity_task(
                activityArn=activity_arn
            )
        except ClientError as err:
            logger.error(
                "Couldn't get a task for activity %s. Here's why: %s: %s",
                activity_arn,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response


    def send_task_success(self, task_token, task_response):
        """
        Sends a success response to a waiting activity step. A state machine with an
        activity step waits for the activity to get task data and then respond with
        either success or failure before it resumes processing.

        :param task_token: The token associated with the task. This is included in the
                           response to the get_activity_task action and must be sent
                           without modification.
        :param task_response: The response data from the activity. This data is
                              received and processed by the state machine.
        """
        try:
            self.stepfunctions_client.send_task_success(
                taskToken=task_token, output=task_response
            )
        except ClientError as err:
            logger.error(
                "Couldn't send task success. Here's why: %s: %s",
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise


    def delete(self, activity_arn):
        """
        Delete an activity.

        :param activity_arn: The ARN of the activity to delete.
        """
        try:
            response = self.stepfunctions_client.delete_activity(
                activityArn=activity_arn
            )
        except ClientError as err:
            logger.error(
                "Couldn't delete activity %s. Here's why: %s: %s",
                activity_arn,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response
```
+ 如需 API 詳細資訊，請參閱《適用於 Python (Boto3) 的AWS SDK API 參考》**中的下列主題。
  + [CreateActivity](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/CreateActivity)
  + [CreateStateMachine](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/CreateStateMachine)
  + [DeleteActivity](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/DeleteActivity)
  + [DeleteStateMachine](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/DeleteStateMachine)
  + [DescribeExecution](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/DescribeExecution)
  + [DescribeStateMachine](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/DescribeStateMachine)
  + [GetActivityTask](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/GetActivityTask)
  + [ListActivities](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/ListActivities)
  + [ListStateMachines](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/ListStateMachines)
  + [SendTaskSuccess](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/SendTaskSuccess)
  + [StartExecution](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/StartExecution)
  + [StopExecution](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/StopExecution)

------

# 使用 AWS SDKs動作
<a name="sfn_code_examples_actions"></a>

下列程式碼範例示範如何使用 AWS SDKs 執行個別 Step Functions 動作。每個範例均包含 GitHub 的連結，您可以在連結中找到設定和執行程式碼的相關說明。

這些摘錄會呼叫 Step Functions API，是必須在內容中執行之大型程式的程式碼摘錄。您可以在 [使用 AWS SDKs案例](sfn_code_examples_scenarios.md) 中查看內容中的動作。

 下列範例僅包含最常使用的動作。如需完整清單，請參閱《[AWS Step Functions API 參考](https://docs.aws.amazon.com/step-functions/latest/apireference/Welcome.html)》。

**Topics**
+ [`CreateActivity`](sfn_example_sfn_CreateActivity_section.md)
+ [`CreateStateMachine`](sfn_example_sfn_CreateStateMachine_section.md)
+ [`DeleteActivity`](sfn_example_sfn_DeleteActivity_section.md)
+ [`DeleteStateMachine`](sfn_example_sfn_DeleteStateMachine_section.md)
+ [`DescribeExecution`](sfn_example_sfn_DescribeExecution_section.md)
+ [`DescribeStateMachine`](sfn_example_sfn_DescribeStateMachine_section.md)
+ [`GetActivityTask`](sfn_example_sfn_GetActivityTask_section.md)
+ [`ListActivities`](sfn_example_sfn_ListActivities_section.md)
+ [`ListExecutions`](sfn_example_sfn_ListExecutions_section.md)
+ [`ListStateMachines`](sfn_example_sfn_ListStateMachines_section.md)
+ [`SendTaskSuccess`](sfn_example_sfn_SendTaskSuccess_section.md)
+ [`StartExecution`](sfn_example_sfn_StartExecution_section.md)

# `CreateActivity` 搭配 AWS SDK 使用
<a name="sfn_example_sfn_CreateActivity_section"></a>

下列程式碼範例示範如何使用 `CreateActivity`。

動作範例是大型程式的程式碼摘錄，必須在內容中執行。您可以在下列程式碼範例的內容中看到此動作：
+  [了解基本概念](sfn_example_sfn_Scenario_GetStartedStateMachines_section.md) 

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。

```
    /// <summary>
    /// Create a Step Functions activity using the supplied name.
    /// </summary>
    /// <param name="activityName">The name for the new Step Functions activity.</param>
    /// <returns>The Amazon Resource Name (ARN) for the new activity.</returns>
    public async Task<string> CreateActivity(string activityName)
    {
        var response = await _amazonStepFunctions.CreateActivityAsync(new CreateActivityRequest { Name = activityName });
        return response.ActivityArn;
    }
```
+  如需 API 詳細資訊，請參閱《*適用於 .NET 的 AWS SDK API 參考*》中的 [CreateActivity](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/CreateActivity)。

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。

```
    public static String createActivity(SfnClient sfnClient, String activityName) {
        try {
            CreateActivityRequest activityRequest = CreateActivityRequest.builder()
                .name(activityName)
                .build();

            CreateActivityResponse response = sfnClient.createActivity(activityRequest);
            return response.activityArn();

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }
```
+  如需 API 詳細資訊，請參閱《*AWS SDK for Java 2.x API 參考*》中的 [CreateActivity](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/CreateActivity)。

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
suspend fun createActivity(activityName: String): String? {
    val activityRequest =
        CreateActivityRequest {
            name = activityName
        }

    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.createActivity(activityRequest)
        return response.activityArn
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的AWS SDK API 參考》**中的 [CreateActivity](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/stepfunctions#code-examples)中設定和執行。

```
class Activity:
    """Encapsulates Step Function activity actions."""

    def __init__(self, stepfunctions_client):
        """
        :param stepfunctions_client: A Boto3 Step Functions client.
        """
        self.stepfunctions_client = stepfunctions_client


    def create(self, name):
        """
        Create an activity.

        :param name: The name of the activity to create.
        :return: The Amazon Resource Name (ARN) of the newly created activity.
        """
        try:
            response = self.stepfunctions_client.create_activity(name=name)
        except ClientError as err:
            logger.error(
                "Couldn't create activity %s. Here's why: %s: %s",
                name,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response["activityArn"]
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [CreateActivity](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/CreateActivity)。

------
#### [ SAP ABAP ]

**適用於 SAP ABAP 的開發套件**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/sfn#code-examples)中設定和執行。

```
    TRY.
        DATA(lo_result) = lo_sfn->createactivity(
          iv_name = iv_name
        ).
        ov_activity_arn = lo_result->get_activityarn( ).
        MESSAGE 'Activity created successfully.' TYPE 'I'.
      CATCH /aws1/cx_sfnactivityalrdyex.
        MESSAGE 'Activity already exists.' TYPE 'E'.
      CATCH /aws1/cx_sfninvalidname.
        MESSAGE 'Invalid activity name.' TYPE 'E'.
      CATCH /aws1/cx_sfnactivitylimitexcd.
        MESSAGE 'Activity limit exceeded.' TYPE 'E'.
    ENDTRY.
```
+  如需 API 詳細資訊，請參閱《適用於 *AWS SAP ABAP 的 SDK API 參考*》中的 [CreateActivity](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)。

------

# `CreateStateMachine` 搭配 AWS SDK 使用
<a name="sfn_example_sfn_CreateStateMachine_section"></a>

下列程式碼範例示範如何使用 `CreateStateMachine`。

動作範例是大型程式的程式碼摘錄，必須在內容中執行。您可以在下列程式碼範例的內容中看到此動作：
+  [了解基本概念](sfn_example_sfn_Scenario_GetStartedStateMachines_section.md) 

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。

```
    /// <summary>
    /// Create a Step Functions state machine.
    /// </summary>
    /// <param name="stateMachineName">Name for the new Step Functions state
    /// machine.</param>
    /// <param name="definition">A JSON string that defines the Step Functions
    /// state machine.</param>
    /// <param name="roleArn">The Amazon Resource Name (ARN) of the role.</param>
    /// <returns></returns>
    public async Task<string> CreateStateMachine(string stateMachineName, string definition, string roleArn)
    {
        var request = new CreateStateMachineRequest
        {
            Name = stateMachineName,
            Definition = definition,
            RoleArn = roleArn
        };

        var response =
            await _amazonStepFunctions.CreateStateMachineAsync(request);
        return response.StateMachineArn;
    }
```
+  如需 API 詳細資訊，請參閱《適用於 .NET 的 AWS SDK API 參考》**中的 [CreateStateMachine](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/CreateStateMachine)。

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。

```
    public static String createMachine(SfnClient sfnClient, String roleARN, String stateMachineName, String json) {
        try {
            CreateStateMachineRequest machineRequest = CreateStateMachineRequest.builder()
                .definition(json)
                .name(stateMachineName)
                .roleArn(roleARN)
                .type(StateMachineType.STANDARD)
                .build();

            CreateStateMachineResponse response = sfnClient.createStateMachine(machineRequest);
            return response.stateMachineArn();

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [CreateStateMachine](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/CreateStateMachine)。

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
suspend fun createMachine(
    roleARNVal: String?,
    stateMachineName: String?,
    jsonVal: String?,
): String? {
    val machineRequest =
        CreateStateMachineRequest {
            definition = jsonVal
            name = stateMachineName
            roleArn = roleARNVal
            type = StateMachineType.Standard
        }

    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.createStateMachine(machineRequest)
        return response.stateMachineArn
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的AWS SDK API 參考》**中的 [CreateStateMachine](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/stepfunctions#code-examples)中設定和執行。

```
class StateMachine:
    """Encapsulates Step Functions state machine actions."""

    def __init__(self, stepfunctions_client):
        """
        :param stepfunctions_client: A Boto3 Step Functions client.
        """
        self.stepfunctions_client = stepfunctions_client


    def create(self, name, definition, role_arn):
        """
        Creates a state machine with the specific definition. The state machine assumes
        the provided role before it starts a run.

        :param name: The name to give the state machine.
        :param definition: The Amazon States Language definition of the steps in the
                           the state machine.
        :param role_arn: The Amazon Resource Name (ARN) of the role that is assumed by
                         Step Functions when the state machine is run.
        :return: The ARN of the newly created state machine.
        """
        try:
            response = self.stepfunctions_client.create_state_machine(
                name=name, definition=definition, roleArn=role_arn
            )
        except ClientError as err:
            logger.error(
                "Couldn't create state machine %s. Here's why: %s: %s",
                name,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response["stateMachineArn"]
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [CreateStateMachine](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/CreateStateMachine)。

------
#### [ SAP ABAP ]

**適用於 SAP ABAP 的開發套件**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/sfn#code-examples)中設定和執行。

```
    TRY.
        DATA(lo_result) = lo_sfn->createstatemachine(
          iv_name = iv_name
          iv_definition = iv_definition
          iv_rolearn = iv_role_arn
        ).
        ov_state_machine_arn = lo_result->get_statemachinearn( ).
        MESSAGE 'State machine created successfully.' TYPE 'I'.
      CATCH /aws1/cx_sfnstatemachinealrex.
        MESSAGE 'State machine already exists.' TYPE 'E'.
      CATCH /aws1/cx_sfninvaliddefinition.
        MESSAGE 'Invalid state machine definition.' TYPE 'E'.
      CATCH /aws1/cx_sfninvalidname.
        MESSAGE 'Invalid state machine name.' TYPE 'E'.
      CATCH /aws1/cx_sfninvalidarn.
        MESSAGE 'Invalid role ARN.' TYPE 'E'.
    ENDTRY.
```
+  如需 API 詳細資訊，請參閱《適用於 *AWS SAP ABAP 的 SDK API 參考*》中的 [CreateStateMachine](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)。

------

# `DeleteActivity` 搭配 AWS SDK 使用
<a name="sfn_example_sfn_DeleteActivity_section"></a>

下列程式碼範例示範如何使用 `DeleteActivity`。

動作範例是大型程式的程式碼摘錄，必須在內容中執行。您可以在下列程式碼範例的內容中看到此動作：
+  [了解基本概念](sfn_example_sfn_Scenario_GetStartedStateMachines_section.md) 

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。

```
    /// <summary>
    /// Delete a Step Machine activity.
    /// </summary>
    /// <param name="activityArn">The Amazon Resource Name (ARN) of
    /// the activity.</param>
    /// <returns>A Boolean value indicating the success of the action.</returns>
    public async Task<bool> DeleteActivity(string activityArn)
    {
        var response = await _amazonStepFunctions.DeleteActivityAsync(new DeleteActivityRequest { ActivityArn = activityArn });
        return response.HttpStatusCode == System.Net.HttpStatusCode.OK;
    }
```
+  如需 API 詳細資訊，請參閱《*適用於 .NET 的 AWS SDK API 參考*》中的 [DeleteActivity](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/DeleteActivity)。

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。

```
    public static void deleteActivity(SfnClient sfnClient, String actArn) {
        try {
            DeleteActivityRequest activityRequest = DeleteActivityRequest.builder()
                .activityArn(actArn)
                .build();

            sfnClient.deleteActivity(activityRequest);
            System.out.println("You have deleted " + actArn);

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
```
+  如需 API 詳細資訊，請參閱《*AWS SDK for Java 2.x API 參考*》中的 [DeleteActivity](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/DeleteActivity)。

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
suspend fun deleteActivity(actArn: String?) {
    val activityRequest =
        DeleteActivityRequest {
            activityArn = actArn
        }

    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        sfnClient.deleteActivity(activityRequest)
        println("You have deleted $actArn")
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的AWS SDK API 參考》**中的 [DeleteActivity](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/stepfunctions#code-examples)中設定和執行。

```
class Activity:
    """Encapsulates Step Function activity actions."""

    def __init__(self, stepfunctions_client):
        """
        :param stepfunctions_client: A Boto3 Step Functions client.
        """
        self.stepfunctions_client = stepfunctions_client


    def delete(self, activity_arn):
        """
        Delete an activity.

        :param activity_arn: The ARN of the activity to delete.
        """
        try:
            response = self.stepfunctions_client.delete_activity(
                activityArn=activity_arn
            )
        except ClientError as err:
            logger.error(
                "Couldn't delete activity %s. Here's why: %s: %s",
                activity_arn,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [DeleteActivity](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/DeleteActivity)。

------
#### [ SAP ABAP ]

**適用於 SAP ABAP 的開發套件**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/sfn#code-examples)中設定和執行。

```
    TRY.
        lo_sfn->deleteactivity(
          iv_activityarn = iv_activity_arn
        ).
        MESSAGE 'Activity deleted successfully.' TYPE 'I'.
      CATCH /aws1/cx_sfninvalidarn.
        MESSAGE 'Invalid activity ARN.' TYPE 'E'.
    ENDTRY.
```
+  如需 API 詳細資訊，請參閱《適用於 *AWS SAP ABAP 的 SDK API 參考*》中的 [DeleteActivity](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)。

------

# `DeleteStateMachine` 搭配 AWS SDK 使用
<a name="sfn_example_sfn_DeleteStateMachine_section"></a>

下列程式碼範例示範如何使用 `DeleteStateMachine`。

動作範例是大型程式的程式碼摘錄，必須在內容中執行。您可以在下列程式碼範例的內容中看到此動作：
+  [了解基本概念](sfn_example_sfn_Scenario_GetStartedStateMachines_section.md) 

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。

```
    /// <summary>
    /// Delete a Step Functions state machine.
    /// </summary>
    /// <param name="stateMachineArn">The Amazon Resource Name (ARN) of the
    /// state machine.</param>
    /// <returns>A Boolean value indicating the success of the action.</returns>
    public async Task<bool> DeleteStateMachine(string stateMachineArn)
    {
        var response = await _amazonStepFunctions.DeleteStateMachineAsync(new DeleteStateMachineRequest
        { StateMachineArn = stateMachineArn });
        return response.HttpStatusCode == System.Net.HttpStatusCode.OK;
    }
```
+  如需 API 詳細資訊，請參閱《適用於 .NET 的 AWS SDK API 參考》**中的 [DeleteStateMachine](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/DeleteStateMachine)。

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。

```
    public static void deleteMachine(SfnClient sfnClient, String stateMachineArn) {
        try {
            DeleteStateMachineRequest deleteStateMachineRequest = DeleteStateMachineRequest.builder()
                .stateMachineArn(stateMachineArn)
                .build();

            sfnClient.deleteStateMachine(deleteStateMachineRequest);
            DescribeStateMachineRequest describeStateMachine = DescribeStateMachineRequest.builder()
                .stateMachineArn(stateMachineArn)
                .build();

            while (true) {
                DescribeStateMachineResponse response = sfnClient.describeStateMachine(describeStateMachine);
                System.out.println("The state machine is not deleted yet. The status is " + response.status());
                Thread.sleep(3000);
            }

        } catch (SfnException | InterruptedException e) {
            System.err.println(e.getMessage());
        }
        System.out.println(stateMachineArn + " was successfully deleted.");
    }
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [DeleteStateMachine](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/DeleteStateMachine)。

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
suspend fun deleteMachine(stateMachineArnVal: String?) {
    val deleteStateMachineRequest =
        DeleteStateMachineRequest {
            stateMachineArn = stateMachineArnVal
        }

    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        sfnClient.deleteStateMachine(deleteStateMachineRequest)
        println("$stateMachineArnVal was successfully deleted.")
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的AWS SDK API 參考》**中的 [DeleteStateMachine](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/stepfunctions#code-examples)中設定和執行。

```
class StateMachine:
    """Encapsulates Step Functions state machine actions."""

    def __init__(self, stepfunctions_client):
        """
        :param stepfunctions_client: A Boto3 Step Functions client.
        """
        self.stepfunctions_client = stepfunctions_client


    def delete(self, state_machine_arn):
        """
        Delete a state machine and all of its run data.

        :param state_machine_arn: The ARN of the state machine to delete.
        """
        try:
            response = self.stepfunctions_client.delete_state_machine(
                stateMachineArn=state_machine_arn
            )
        except ClientError as err:
            logger.error(
                "Couldn't delete state machine %s. Here's why: %s: %s",
                state_machine_arn,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [DeleteStateMachine](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/DeleteStateMachine)。

------
#### [ SAP ABAP ]

**適用於 SAP ABAP 的開發套件**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/sfn#code-examples)中設定和執行。

```
    TRY.
        lo_sfn->deletestatemachine(
          iv_statemachinearn = iv_state_machine_arn
        ).
        MESSAGE 'State machine deleted successfully.' TYPE 'I'.
      CATCH /aws1/cx_sfninvalidarn.
        MESSAGE 'Invalid state machine ARN.' TYPE 'E'.
      CATCH /aws1/cx_sfnvalidationex.
        MESSAGE 'Validation error occurred.' TYPE 'E'.
    ENDTRY.
```
+  如需 API 詳細資訊，請參閱《適用於 *AWS SAP ABAP 的 SDK API 參考*》中的 [DeleteStateMachine](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)。

------

# `DescribeExecution` 搭配 AWS SDK 使用
<a name="sfn_example_sfn_DescribeExecution_section"></a>

下列程式碼範例示範如何使用 `DescribeExecution`。

動作範例是大型程式的程式碼摘錄，必須在內容中執行。您可以在下列程式碼範例的內容中看到此動作：
+  [了解基本概念](sfn_example_sfn_Scenario_GetStartedStateMachines_section.md) 

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。

```
    /// <summary>
    /// Retrieve information about the specified Step Functions execution.
    /// </summary>
    /// <param name="executionArn">The Amazon Resource Name (ARN) of the
    /// Step Functions execution.</param>
    /// <returns>The API response returned by the API.</returns>
    public async Task<DescribeExecutionResponse> DescribeExecutionAsync(string executionArn)
    {
        var response = await _amazonStepFunctions.DescribeExecutionAsync(new DescribeExecutionRequest { ExecutionArn = executionArn });
        return response;
    }
```
+  如需 API 詳細資訊，請參閱《適用於 .NET 的 AWS SDK API 參考》**中的 [DescribeExecution](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/DescribeExecution)。

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。

```
    public static void describeExe(SfnClient sfnClient, String executionArn) {
        try {
            DescribeExecutionRequest executionRequest = DescribeExecutionRequest.builder()
                .executionArn(executionArn)
                .build();

            String status = "";
            boolean hasSucceeded = false;
            while (!hasSucceeded) {
                DescribeExecutionResponse response = sfnClient.describeExecution(executionRequest);
                status = response.statusAsString();
                if (status.compareTo("RUNNING") == 0) {
                    System.out.println("The state machine is still running, let's wait for it to finish.");
                    Thread.sleep(2000);
                } else if (status.compareTo("SUCCEEDED") == 0) {
                    System.out.println("The Step Function workflow has succeeded");
                    hasSucceeded = true;
                } else {
                    System.out.println("The Status is neither running or succeeded");
                }
            }
            System.out.println("The Status is " + status);

        } catch (SfnException | InterruptedException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
    }
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [DescribeExecution](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/DescribeExecution)。

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
suspend fun describeExe(executionArnVal: String?) {
    val executionRequest =
        DescribeExecutionRequest {
            executionArn = executionArnVal
        }

    var status = ""
    var hasSucceeded = false
    while (!hasSucceeded) {
        SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
            val response = sfnClient.describeExecution(executionRequest)
            status = response.status.toString()
            if (status.compareTo("Running") == 0) {
                println("The state machine is still running, let's wait for it to finish.")
                Thread.sleep(2000)
            } else if (status.compareTo("Succeeded") == 0) {
                println("The Step Function workflow has succeeded")
                hasSucceeded = true
            } else {
                println("The Status is $status")
            }
        }
    }
    println("The Status is $status")
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的 AWS  SDK API 參考》**中的 [DescribeExecution](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/stepfunctions#code-examples)中設定和執行。

```
    def describe_run(self, run_arn):
        """
        Get data about a state machine run, such as its current status or final output.

        :param run_arn: The ARN of the run to look up.
        :return: The retrieved run data.
        """
        try:
            response = self.stepfunctions_client.describe_execution(
                executionArn=run_arn
            )
        except ClientError as err:
            logger.error(
                "Couldn't describe run %s. Here's why: %s: %s",
                run_arn,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [DescribeExecution](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/DescribeExecution)。

------
#### [ SAP ABAP ]

**適用於 SAP ABAP 的開發套件**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/sfn#code-examples)中設定和執行。

```
    TRY.
        oo_result = lo_sfn->describeexecution(
          iv_executionarn = iv_execution_arn
        ).
        MESSAGE 'Execution described successfully.' TYPE 'I'.
      CATCH /aws1/cx_sfnexecdoesnotexist.
        MESSAGE 'Execution does not exist.' TYPE 'E'.
      CATCH /aws1/cx_sfninvalidarn.
        MESSAGE 'Invalid execution ARN.' TYPE 'E'.
    ENDTRY.
```
+  如需 API 詳細資訊，請參閱《適用於 *AWS SAP ABAP 的 SDK API 參考*》中的 [DescribeExecution](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)。

------

# `DescribeStateMachine` 搭配 AWS SDK 使用
<a name="sfn_example_sfn_DescribeStateMachine_section"></a>

下列程式碼範例示範如何使用 `DescribeStateMachine`。

動作範例是大型程式的程式碼摘錄，必須在內容中執行。您可以在下列程式碼範例的內容中看到此動作：
+  [了解基本概念](sfn_example_sfn_Scenario_GetStartedStateMachines_section.md) 

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。

```
    /// <summary>
    /// Retrieve information about the specified Step Functions state machine.
    /// </summary>
    /// <param name="StateMachineArn">The Amazon Resource Name (ARN) of the
    /// Step Functions state machine to retrieve.</param>
    /// <returns>Information about the specified Step Functions state machine.</returns>
    public async Task<DescribeStateMachineResponse> DescribeStateMachineAsync(string StateMachineArn)
    {
        var response = await _amazonStepFunctions.DescribeStateMachineAsync(new DescribeStateMachineRequest { StateMachineArn = StateMachineArn });
        return response;
    }
```
+  如需 API 詳細資訊，請參閱《適用於 .NET 的 AWS SDK 命令參考》**中的 [DescribeStateMachine](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/DescribeStateMachine)。

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。

```
    public static void describeStateMachine(SfnClient sfnClient, String stateMachineArn) {
        try {
            DescribeStateMachineRequest stateMachineRequest = DescribeStateMachineRequest.builder()
                .stateMachineArn(stateMachineArn)
                .build();

            DescribeStateMachineResponse response = sfnClient.describeStateMachine(stateMachineRequest);
            System.out.println("The name of the State machine is " + response.name());
            System.out.println("The status of the State machine is " + response.status());
            System.out.println("The ARN value of the State machine is " + response.stateMachineArn());
            System.out.println("The role ARN value is " + response.roleArn());

        } catch (SfnException e) {
            System.err.println(e.getMessage());
        }
    }
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x 命令參考》**中的 [DescribeStateMachine](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/DescribeStateMachine)。

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
suspend fun describeStateMachine(stateMachineArnVal: String?) {
    val stateMachineRequest =
        DescribeStateMachineRequest {
            stateMachineArn = stateMachineArnVal
        }
    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.describeStateMachine(stateMachineRequest)
        println("The name of the State machine is ${response.name}")
        println("The status of the State machine is ${response.status}")
        println("The ARN value of the State machine is ${response.stateMachineArn}")
        println("The role ARN value is ${response.roleArn}")
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的 AWS  SDK API 參考》**中的 [DescribeStateMachine](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/stepfunctions#code-examples)中設定和執行。

```
class StateMachine:
    """Encapsulates Step Functions state machine actions."""

    def __init__(self, stepfunctions_client):
        """
        :param stepfunctions_client: A Boto3 Step Functions client.
        """
        self.stepfunctions_client = stepfunctions_client


    def describe(self, state_machine_arn):
        """
        Get data about a state machine.

        :param state_machine_arn: The ARN of the state machine to look up.
        :return: The retrieved state machine data.
        """
        try:
            response = self.stepfunctions_client.describe_state_machine(
                stateMachineArn=state_machine_arn
            )
        except ClientError as err:
            logger.error(
                "Couldn't describe state machine %s. Here's why: %s: %s",
                state_machine_arn,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [DescribeStateMachine](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/DescribeStateMachine)。

------
#### [ SAP ABAP ]

**適用於 SAP ABAP 的開發套件**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/sfn#code-examples)中設定和執行。

```
    TRY.
        oo_result = lo_sfn->describestatemachine(
          iv_statemachinearn = iv_state_machine_arn
        ).
        MESSAGE 'State machine described successfully.' TYPE 'I'.
      CATCH /aws1/cx_sfnstatemachinedoes00.
        MESSAGE 'State machine does not exist.' TYPE 'E'.
      CATCH /aws1/cx_sfninvalidarn.
        MESSAGE 'Invalid state machine ARN.' TYPE 'E'.
    ENDTRY.
```
+  如需 API 詳細資訊，請參閱《適用於 *AWS SAP ABAP 的 SDK API 參考*》中的 [DescribeStateMachine](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)。

------

# `GetActivityTask` 搭配 AWS SDK 使用
<a name="sfn_example_sfn_GetActivityTask_section"></a>

下列程式碼範例示範如何使用 `GetActivityTask`。

動作範例是大型程式的程式碼摘錄，必須在內容中執行。您可以在下列程式碼範例的內容中看到此動作：
+  [了解基本概念](sfn_example_sfn_Scenario_GetStartedStateMachines_section.md) 

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。

```
    /// <summary>
    /// Retrieve a task with the specified Step Functions activity
    /// with the specified Amazon Resource Name (ARN).
    /// </summary>
    /// <param name="activityArn">The Amazon Resource Name (ARN) of
    /// the Step Functions activity.</param>
    /// <param name="workerName">The name of the Step Functions worker.</param>
    /// <returns>The response from the Step Functions activity.</returns>
    public async Task<GetActivityTaskResponse> GetActivityTaskAsync(string activityArn, string workerName)
    {
        var response = await _amazonStepFunctions.GetActivityTaskAsync(new GetActivityTaskRequest
        { ActivityArn = activityArn, WorkerName = workerName });
        return response;
    }
```
+  如需 API 詳細資訊，請參閱《適用於 .NET 的 AWS SDK API 參考》**中的 [GetActivityTask](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/GetActivityTask)。

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。

```
    public static List<String> getActivityTask(SfnClient sfnClient, String actArn) {
        List<String> myList = new ArrayList<>();
        GetActivityTaskRequest getActivityTaskRequest = GetActivityTaskRequest.builder()
            .activityArn(actArn)
            .build();

        GetActivityTaskResponse response = sfnClient.getActivityTask(getActivityTaskRequest);
        myList.add(response.taskToken());
        myList.add(response.input());
        return myList;
    }
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [GetActivityTask](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/GetActivityTask)。

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
suspend fun getActivityTask(actArn: String?): List<String> {
    val myList: MutableList<String> = ArrayList()
    val getActivityTaskRequest =
        GetActivityTaskRequest {
            activityArn = actArn
        }
    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.getActivityTask(getActivityTaskRequest)
        myList.add(response.taskToken.toString())
        myList.add(response.input.toString())
        return myList
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的AWS SDK API 參考》**中的 [GetActivityTask](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/stepfunctions#code-examples)中設定和執行。

```
class Activity:
    """Encapsulates Step Function activity actions."""

    def __init__(self, stepfunctions_client):
        """
        :param stepfunctions_client: A Boto3 Step Functions client.
        """
        self.stepfunctions_client = stepfunctions_client


    def get_task(self, activity_arn):
        """
        Gets task data for an activity. When a state machine is waiting for the
        specified activity, a response is returned with data from the state machine.
        When a state machine is not waiting, this call blocks for 60 seconds.

        :param activity_arn: The ARN of the activity to get task data for.
        :return: The task data for the activity.
        """
        try:
            response = self.stepfunctions_client.get_activity_task(
                activityArn=activity_arn
            )
        except ClientError as err:
            logger.error(
                "Couldn't get a task for activity %s. Here's why: %s: %s",
                activity_arn,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [GetActivityTask](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/GetActivityTask)。

------
#### [ SAP ABAP ]

**適用於 SAP ABAP 的開發套件**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/sfn#code-examples)中設定和執行。

```
    TRY.
        oo_result = lo_sfn->getactivitytask(
          iv_activityarn = iv_activity_arn
        ).
        MESSAGE 'Activity task retrieved successfully.' TYPE 'I'.
      CATCH /aws1/cx_sfnactivitydoesnotex.
        MESSAGE 'Activity does not exist.' TYPE 'E'.
      CATCH /aws1/cx_sfninvalidarn.
        MESSAGE 'Invalid activity ARN.' TYPE 'E'.
      CATCH /aws1/cx_sfnactivityworkerlm00.
        MESSAGE 'Activity worker limit exceeded.' TYPE 'E'.
    ENDTRY.
```
+  如需 API 詳細資訊，請參閱《適用於 *AWS SAP ABAP 的 SDK API 參考*》中的 [GetActivityTask](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)。

------

# `ListActivities` 搭配 AWS SDK 使用
<a name="sfn_example_sfn_ListActivities_section"></a>

下列程式碼範例示範如何使用 `ListActivities`。

動作範例是大型程式的程式碼摘錄，必須在內容中執行。您可以在下列程式碼範例的內容中看到此動作：
+  [了解基本概念](sfn_example_sfn_Scenario_GetStartedStateMachines_section.md) 

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。

```
    /// <summary>
    /// List the Step Functions activities for the current account.
    /// </summary>
    /// <returns>A list of ActivityListItems.</returns>
    public async Task<List<ActivityListItem>> ListActivitiesAsync()
    {
        var request = new ListActivitiesRequest();
        var activities = new List<ActivityListItem>();

        do
        {
            var response = await _amazonStepFunctions.ListActivitiesAsync(request);

            if (response.NextToken is not null)
            {
                request.NextToken = response.NextToken;
            }

            activities.AddRange(response.Activities);
        }
        while (request.NextToken is not null);

        return activities;
    }
```
+  如需 API 詳細資訊，請參閱《適用於 .NET 的 AWS SDK API 參考》**中的 [ListActivities](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/ListActivities)。

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。

```
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.sfn.SfnClient;
import software.amazon.awssdk.services.sfn.model.ListActivitiesRequest;
import software.amazon.awssdk.services.sfn.model.ListActivitiesResponse;
import software.amazon.awssdk.services.sfn.model.SfnException;
import software.amazon.awssdk.services.sfn.model.ActivityListItem;
import java.util.List;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class ListActivities {
    public static void main(String[] args) {
        Region region = Region.US_EAST_1;
        SfnClient sfnClient = SfnClient.builder()
                .region(region)
                .build();

        listAllActivites(sfnClient);
        sfnClient.close();
    }

    public static void listAllActivites(SfnClient sfnClient) {
        try {
            ListActivitiesRequest activitiesRequest = ListActivitiesRequest.builder()
                    .maxResults(10)
                    .build();

            ListActivitiesResponse response = sfnClient.listActivities(activitiesRequest);
            List<ActivityListItem> items = response.activities();
            for (ActivityListItem item : items) {
                System.out.println("The activity ARN is " + item.activityArn());
                System.out.println("The activity name is " + item.name());
            }

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
}
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [ListActivities](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/ListActivities)。

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
suspend fun listAllActivites() {
    val activitiesRequest =
        ListActivitiesRequest {
            maxResults = 10
        }

    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.listActivities(activitiesRequest)
        response.activities?.forEach { item ->
            println("The activity ARN is ${item.activityArn}")
            println("The activity name is ${item.name}")
        }
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的AWS SDK API 參考》**中的 [ListActivities](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/stepfunctions#code-examples)中設定和執行。

```
class Activity:
    """Encapsulates Step Function activity actions."""

    def __init__(self, stepfunctions_client):
        """
        :param stepfunctions_client: A Boto3 Step Functions client.
        """
        self.stepfunctions_client = stepfunctions_client


    def find(self, name):
        """
        Find an activity by name. This requires listing activities until one is found
        with a matching name.

        :param name: The name of the activity to search for.
        :return: If found, the ARN of the activity; otherwise, None.
        """
        try:
            paginator = self.stepfunctions_client.get_paginator("list_activities")
            for page in paginator.paginate():
                for activity in page.get("activities", []):
                    if activity["name"] == name:
                        return activity["activityArn"]
        except ClientError as err:
            logger.error(
                "Couldn't list activities. Here's why: %s: %s",
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [ListActivities](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/ListActivities)。

------
#### [ SAP ABAP ]

**適用於 SAP ABAP 的開發套件**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/sfn#code-examples)中設定和執行。

```
    TRY.
        DATA(lo_result) = lo_sfn->listactivities( ).
        DATA(lt_activities) = lo_result->get_activities( ).
        LOOP AT lt_activities INTO DATA(lo_activity).
          IF lo_activity->get_name( ) = iv_name.
            ov_activity_arn = lo_activity->get_activityarn( ).
            EXIT.
          ENDIF.
        ENDLOOP.
        MESSAGE 'Activities listed successfully.' TYPE 'I'.
      CATCH /aws1/cx_sfninvalidtoken.
        MESSAGE 'Invalid pagination token.' TYPE 'E'.
    ENDTRY.
```
+  如需 API 詳細資訊，請參閱《適用於 *AWS SAP ABAP 的 SDK API 參考*》中的 [ListActivities](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)。

------

# `ListExecutions` 搭配 AWS SDK 使用
<a name="sfn_example_sfn_ListExecutions_section"></a>

下列程式碼範例示範如何使用 `ListExecutions`。

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。

```
    /// <summary>
    /// Retrieve information about executions of a Step Functions
    /// state machine.
    /// </summary>
    /// <param name="stateMachineArn">The Amazon Resource Name (ARN) of the
    /// Step Functions state machine.</param>
    /// <returns>A list of ExecutionListItem objects.</returns>
    public async Task<List<ExecutionListItem>> ListExecutionsAsync(string stateMachineArn)
    {
        var executions = new List<ExecutionListItem>();
        ListExecutionsResponse response;
        var request = new ListExecutionsRequest { StateMachineArn = stateMachineArn };

        do
        {
            response = await _amazonStepFunctions.ListExecutionsAsync(request);
            executions.AddRange(response.Executions);
            if (response.NextToken is not null)
            {
                request.NextToken = response.NextToken;
            }
        } while (response.NextToken is not null);

        return executions;
    }
```
+  如需 API 詳細資訊，請參閱《適用於 .NET 的 AWS SDK API 參考》**中的 [ListExecutions](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/ListExecutions)。

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。

```
    public static void getExeHistory(SfnClient sfnClient, String exeARN) {
        try {
            GetExecutionHistoryRequest historyRequest = GetExecutionHistoryRequest.builder()
                    .executionArn(exeARN)
                    .maxResults(10)
                    .build();

            GetExecutionHistoryResponse historyResponse = sfnClient.getExecutionHistory(historyRequest);
            List<HistoryEvent> events = historyResponse.events();
            for (HistoryEvent event : events) {
                System.out.println("The event type is " + event.type().toString());
            }

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [ListExecutions](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/ListExecutions)。

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
suspend fun getExeHistory(exeARN: String?) {
    val historyRequest =
        GetExecutionHistoryRequest {
            executionArn = exeARN
            maxResults = 10
        }

    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.getExecutionHistory(historyRequest)
        response.events?.forEach { event ->
            println("The event type is ${event.type}")
        }
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的AWS SDK API 參考》**中的 [ListExecutions](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------

# `ListStateMachines` 搭配 AWS SDK 使用
<a name="sfn_example_sfn_ListStateMachines_section"></a>

下列程式碼範例示範如何使用 `ListStateMachines`。

動作範例是大型程式的程式碼摘錄，必須在內容中執行。您可以在下列程式碼範例的內容中看到此動作：
+  [了解基本概念](sfn_example_sfn_Scenario_GetStartedStateMachines_section.md) 

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。

```
    /// <summary>
    /// Retrieve a list of Step Functions state machines.
    /// </summary>
    /// <returns>A list of StateMachineListItem objects.</returns>
    public async Task<List<StateMachineListItem>> ListStateMachinesAsync()
    {
        var stateMachines = new List<StateMachineListItem>();
        var listStateMachinesPaginator =
            _amazonStepFunctions.Paginators.ListStateMachines(new ListStateMachinesRequest());

        await foreach (var response in listStateMachinesPaginator.Responses)
        {
            stateMachines.AddRange(response.StateMachines);
        }

        return stateMachines;
    }
```
+  如需 API 詳細資訊，請參閱《適用於 .NET 的 AWS SDK API 參考》**中的 [ListStateMachines](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/ListStateMachines)。

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。

```
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.sfn.SfnClient;
import software.amazon.awssdk.services.sfn.model.ListStateMachinesResponse;
import software.amazon.awssdk.services.sfn.model.SfnException;
import software.amazon.awssdk.services.sfn.model.StateMachineListItem;
import java.util.List;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class ListStateMachines {
    public static void main(String[] args) {
        Region region = Region.US_EAST_1;
        SfnClient sfnClient = SfnClient.builder()
                .region(region)
                .build();

        listMachines(sfnClient);
        sfnClient.close();
    }

    public static void listMachines(SfnClient sfnClient) {
        try {
            ListStateMachinesResponse response = sfnClient.listStateMachines();
            List<StateMachineListItem> machines = response.stateMachines();
            for (StateMachineListItem machine : machines) {
                System.out.println("The name of the state machine is: " + machine.name());
                System.out.println("The ARN value is : " + machine.stateMachineArn());
            }

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
}
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [ListStateMachines](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/ListStateMachines)。

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
import aws.sdk.kotlin.services.sfn.SfnClient
import aws.sdk.kotlin.services.sfn.model.ListStateMachinesRequest

/**
 Before running this Kotlin code example, set up your development environment,
 including your credentials.

 For more information, see the following documentation topic:
 https://docs.aws.amazon.com/sdk-for-kotlin/latest/developer-guide/setup.html
 */

suspend fun main() {
    println(DASHES)
    println("Welcome to the AWS Step Functions Hello example.")
    println("Lets list up to ten of your state machines:")
    println(DASHES)

    listMachines()
}

suspend fun listMachines() {
    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.listStateMachines(ListStateMachinesRequest {})
        response.stateMachines?.forEach { machine ->
            println("The name of the state machine is ${machine.name}")
            println("The ARN value is ${machine.stateMachineArn}")
        }
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的AWS SDK API 參考》**的 [ListStateMachines](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/stepfunctions#code-examples)中設定和執行。
透過搜尋帳戶的狀態機器清單，依名稱尋找狀態機器。  

```
class StateMachine:
    """Encapsulates Step Functions state machine actions."""

    def __init__(self, stepfunctions_client):
        """
        :param stepfunctions_client: A Boto3 Step Functions client.
        """
        self.stepfunctions_client = stepfunctions_client


    def find(self, name):
        """
        Find a state machine by name. This requires listing the state machines until
        one is found with a matching name.

        :param name: The name of the state machine to search for.
        :return: The ARN of the state machine if found; otherwise, None.
        """
        try:
            paginator = self.stepfunctions_client.get_paginator("list_state_machines")
            for page in paginator.paginate():
                for state_machine in page.get("stateMachines", []):
                    if state_machine["name"] == name:
                        return state_machine["stateMachineArn"]
        except ClientError as err:
            logger.error(
                "Couldn't list state machines. Here's why: %s: %s",
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [ListStateMachines](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/ListStateMachines)。

------
#### [ SAP ABAP ]

**適用於 SAP ABAP 的開發套件**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/sfn#code-examples)中設定和執行。

```
    TRY.
        DATA(lo_result) = lo_sfn->liststatemachines( ).
        DATA(lt_state_machines) = lo_result->get_statemachines( ).
        LOOP AT lt_state_machines INTO DATA(lo_state_machine).
          IF lo_state_machine->get_name( ) = iv_name.
            ov_state_machine_arn = lo_state_machine->get_statemachinearn( ).
            EXIT.
          ENDIF.
        ENDLOOP.
        MESSAGE 'State machines listed successfully.' TYPE 'I'.
      CATCH /aws1/cx_sfninvalidtoken.
        MESSAGE 'Invalid pagination token.' TYPE 'E'.
    ENDTRY.
```
+  如需 API 詳細資訊，請參閱《適用於 *AWS SAP ABAP 的 SDK API 參考*》中的 [ListStateMachines](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)。

------

# `SendTaskSuccess` 搭配 AWS SDK 使用
<a name="sfn_example_sfn_SendTaskSuccess_section"></a>

下列程式碼範例示範如何使用 `SendTaskSuccess`。

動作範例是大型程式的程式碼摘錄，必須在內容中執行。您可以在下列程式碼範例的內容中看到此動作：
+  [了解基本概念](sfn_example_sfn_Scenario_GetStartedStateMachines_section.md) 

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。

```
    /// <summary>
    /// Indicate that the Step Functions task, indicated by the
    /// task token, has completed successfully.
    /// </summary>
    /// <param name="taskToken">Identifies the task.</param>
    /// <param name="taskResponse">The response received from executing the task.</param>
    /// <returns>A Boolean value indicating the success of the action.</returns>
    public async Task<bool> SendTaskSuccessAsync(string taskToken, string taskResponse)
    {
        var response = await _amazonStepFunctions.SendTaskSuccessAsync(new SendTaskSuccessRequest
        { TaskToken = taskToken, Output = taskResponse });

        return response.HttpStatusCode == System.Net.HttpStatusCode.OK;
    }
```
+  如需 API 詳細資訊，請參閱《適用於 .NET 的 AWS SDK API 參考》**中的 [SendTaskSuccess](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/SendTaskSuccess)。

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。

```
    public static void sendTaskSuccess(SfnClient sfnClient, String token, String json) {
        try {
            SendTaskSuccessRequest successRequest = SendTaskSuccessRequest.builder()
                .taskToken(token)
                .output(json)
                .build();

            sfnClient.sendTaskSuccess(successRequest);

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [SendTaskSuccess](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/SendTaskSuccess)。

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
suspend fun sendTaskSuccess(
    token: String?,
    json: String?,
) {
    val successRequest =
        SendTaskSuccessRequest {
            taskToken = token
            output = json
        }
    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        sfnClient.sendTaskSuccess(successRequest)
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的AWS SDK API 參考》**中的 [SendTaskSuccess](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/stepfunctions#code-examples)中設定和執行。

```
class Activity:
    """Encapsulates Step Function activity actions."""

    def __init__(self, stepfunctions_client):
        """
        :param stepfunctions_client: A Boto3 Step Functions client.
        """
        self.stepfunctions_client = stepfunctions_client


    def send_task_success(self, task_token, task_response):
        """
        Sends a success response to a waiting activity step. A state machine with an
        activity step waits for the activity to get task data and then respond with
        either success or failure before it resumes processing.

        :param task_token: The token associated with the task. This is included in the
                           response to the get_activity_task action and must be sent
                           without modification.
        :param task_response: The response data from the activity. This data is
                              received and processed by the state machine.
        """
        try:
            self.stepfunctions_client.send_task_success(
                taskToken=task_token, output=task_response
            )
        except ClientError as err:
            logger.error(
                "Couldn't send task success. Here's why: %s: %s",
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [SendTaskSuccess](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/SendTaskSuccess)。

------
#### [ SAP ABAP ]

**適用於 SAP ABAP 的開發套件**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/sfn#code-examples)中設定和執行。

```
    TRY.
        lo_sfn->sendtasksuccess(
          iv_tasktoken = iv_task_token
          iv_output = iv_task_response
        ).
        MESSAGE 'Task success sent successfully.' TYPE 'I'.
      CATCH /aws1/cx_sfninvalidtoken.
        MESSAGE 'Invalid task token.' TYPE 'E'.
      CATCH /aws1/cx_sfntaskdoesnotexist.
        MESSAGE 'Task does not exist.' TYPE 'E'.
      CATCH /aws1/cx_sfninvalidoutput.
        MESSAGE 'Invalid task output.' TYPE 'E'.
      CATCH /aws1/cx_sfntasktimedout.
        MESSAGE 'Task timed out.' TYPE 'E'.
    ENDTRY.
```
+  如需 API 詳細資訊，請參閱《適用於 *AWS SAP ABAP 的 SDK API 參考*》中的 [SendTaskSuccess](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)。

------

# `StartExecution` 搭配 AWS SDK 使用
<a name="sfn_example_sfn_StartExecution_section"></a>

下列程式碼範例示範如何使用 `StartExecution`。

動作範例是大型程式的程式碼摘錄，必須在內容中執行。您可以在下列程式碼範例的內容中看到此動作：
+  [了解基本概念](sfn_example_sfn_Scenario_GetStartedStateMachines_section.md) 

------
#### [ .NET ]

**適用於 .NET 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv3/StepFunctions#code-examples)中設定和執行。

```
    /// <summary>
    /// Start execution of an AWS Step Functions state machine.
    /// </summary>
    /// <param name="executionName">The name to use for the execution.</param>
    /// <param name="executionJson">The JSON string to pass for execution.</param>
    /// <param name="stateMachineArn">The Amazon Resource Name (ARN) of the
    /// Step Functions state machine.</param>
    /// <returns>The Amazon Resource Name (ARN) of the AWS Step Functions
    /// execution.</returns>
    public async Task<string> StartExecutionAsync(string executionJson, string stateMachineArn)
    {
        var executionRequest = new StartExecutionRequest
        {
            Input = executionJson,
            StateMachineArn = stateMachineArn
        };

        var response = await _amazonStepFunctions.StartExecutionAsync(executionRequest);
        return response.ExecutionArn;
    }
```
+  如需 API 詳細資訊，請參閱《適用於 .NET 的 AWS SDK API 參考》**中的 [StartExecution](https://docs.aws.amazon.com/goto/DotNetSDKV3/states-2016-11-23/StartExecution)。

------
#### [ Java ]

**SDK for Java 2.x**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/stepfunctions#code-examples)中設定和執行。

```
    public static String startWorkflow(SfnClient sfnClient, String stateMachineArn, String jsonEx) {
        UUID uuid = UUID.randomUUID();
        String uuidValue = uuid.toString();
        try {
            StartExecutionRequest executionRequest = StartExecutionRequest.builder()
                .input(jsonEx)
                .stateMachineArn(stateMachineArn)
                .name(uuidValue)
                .build();

            StartExecutionResponse response = sfnClient.startExecution(executionRequest);
            return response.executionArn();

        } catch (SfnException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [StartExecution](https://docs.aws.amazon.com/goto/SdkForJavaV2/states-2016-11-23/StartExecution)。

------
#### [ JavaScript ]

**適用於 JavaScript (v3) 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javascriptv3/example_code/sfn#code-examples)中設定和執行。

```
import { SFNClient, StartExecutionCommand } from "@aws-sdk/client-sfn";

/**
 * @param {{ sfnClient: SFNClient, stateMachineArn: string }} config
 */
export async function startExecution({ sfnClient, stateMachineArn }) {
  const response = await sfnClient.send(
    new StartExecutionCommand({
      stateMachineArn,
    }),
  );
  console.log(response);
  // Example response:
  // {
  //   '$metadata': {
  //     httpStatusCode: 200,
  //     requestId: '202a9309-c16a-454b-adeb-c4d19afe3bf2',
  //     extendedRequestId: undefined,
  //     cfId: undefined,
  //     attempts: 1,
  //     totalRetryDelay: 0
  //   },
  //   executionArn: 'arn:aws:states:us-east-1:000000000000:execution:MyStateMachine:aaaaaaaa-f787-49fb-a20c-1b61c64eafe6',
  //   startDate: 2024-01-04T15:54:08.362Z
  // }
  return response;
}

// Call function if run directly
import { fileURLToPath } from "node:url";
if (process.argv[1] === fileURLToPath(import.meta.url)) {
  startExecution({ sfnClient: new SFNClient({}), stateMachineArn: "ARN" });
}
```
+  如需 API 詳細資訊，請參閱《適用於 JavaScript 的 AWS SDK API 參考》**中的 [StartExecution](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/sfn/command/StartExecutionCommand)。

------
#### [ Kotlin ]

**適用於 Kotlin 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/stepfunctions#code-examples)中設定和執行。

```
suspend fun startWorkflow(
    stateMachineArnVal: String?,
    jsonEx: String?,
): String? {
    val uuid = UUID.randomUUID()
    val uuidValue = uuid.toString()
    val executionRequest =
        StartExecutionRequest {
            input = jsonEx
            stateMachineArn = stateMachineArnVal
            name = uuidValue
        }
    SfnClient.fromEnvironment { region = "us-east-1" }.use { sfnClient ->
        val response = sfnClient.startExecution(executionRequest)
        return response.executionArn
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的 AWS  SDK API 參考》**中的 [StartExecution](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/stepfunctions#code-examples)中設定和執行。

```
class StateMachine:
    """Encapsulates Step Functions state machine actions."""

    def __init__(self, stepfunctions_client):
        """
        :param stepfunctions_client: A Boto3 Step Functions client.
        """
        self.stepfunctions_client = stepfunctions_client


    def start(self, state_machine_arn, run_input):
        """
        Start a run of a state machine with a specified input. A run is also known
        as an "execution" in Step Functions.

        :param state_machine_arn: The ARN of the state machine to run.
        :param run_input: The input to the state machine, in JSON format.
        :return: The ARN of the run. This can be used to get information about the run,
                 including its current status and final output.
        """
        try:
            response = self.stepfunctions_client.start_execution(
                stateMachineArn=state_machine_arn, input=run_input
            )
        except ClientError as err:
            logger.error(
                "Couldn't start state machine %s. Here's why: %s: %s",
                state_machine_arn,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response["executionArn"]
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [StartExecution](https://docs.aws.amazon.com/goto/boto3/states-2016-11-23/StartExecution)。

------
#### [ SAP ABAP ]

**適用於 SAP ABAP 的開發套件**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/sfn#code-examples)中設定和執行。

```
    TRY.
        DATA(lo_result) = lo_sfn->startexecution(
          iv_statemachinearn = iv_state_machine_arn
          iv_input = iv_input
        ).
        ov_execution_arn = lo_result->get_executionarn( ).
        MESSAGE 'Execution started successfully.' TYPE 'I'.
      CATCH /aws1/cx_sfnstatemachinedoes00.
        MESSAGE 'State machine does not exist.' TYPE 'E'.
      CATCH /aws1/cx_sfninvalidarn.
        MESSAGE 'Invalid state machine ARN.' TYPE 'E'.
      CATCH /aws1/cx_sfninvalidexecinput.
        MESSAGE 'Invalid execution input.' TYPE 'E'.
      CATCH /aws1/cx_sfnexeclimitexceeded.
        MESSAGE 'Execution limit exceeded.' TYPE 'E'.
    ENDTRY.
```
+  如需 API 詳細資訊，請參閱《適用於 *AWS SAP ABAP 的 SDK API 參考*》中的 [StartExecution](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)。

------

# 使用 AWS SDKs案例
<a name="sfn_code_examples_scenarios"></a>

下列程式碼範例說明如何在 Step Functions AWS SDKs中實作常見案例。這些案例示範如何呼叫 Step Functions 中的多個函數，或與其他 AWS 服務結合，藉以完成特定任務。每個案例均包含完整原始碼的連結，您可在連結中找到如何設定和執行程式碼的相關指示。

案例的目標是獲得中等水平的經驗，協助您了解內容中的服務動作。

**Topics**
+ [建立傳訊應用程式](sfn_example_cross_StepFunctionsMessenger_section.md)
+ [使用 Step Functions 協調生成式 AI 應用程式](sfn_example_cross_ServerlessPromptChaining_section.md)
+ [使用 Step Functions 調用 Lambda 函式](sfn_example_cross_ServerlessWorkflows_section.md)

# 使用 Step Functions 建立傳訊應用程式
<a name="sfn_example_cross_StepFunctionsMessenger_section"></a>

下列程式碼範例示範如何建立 AWS Step Functions 訊息應用程式，從資料庫資料表擷取訊息記錄。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 示範如何使用 適用於 Python (Boto3) 的 AWS SDK 搭配 AWS Step Functions 來建立訊息應用程式，從 Amazon DynamoDB 資料表擷取訊息記錄，並使用 Amazon Simple Queue Service (Amazon SQS) 傳送它們。狀態機器會與 AWS Lambda 函數整合，以掃描資料庫是否有未傳送的訊息。  
+ 建立從 Amazon DynamoDB 資料表擷取和更新訊息記錄的狀態機器。
+ 更新狀態機器定義，以便也向 Amazon Simple Queue Service (Amazon SQS) 傳送訊息。
+ 開始和停用狀態機器執行。
+ 使用服務整合從狀態機器連接至 Lambda、DynamoDB 和 Amazon SQS。
 如需完整的原始碼和如何設定及執行的指示，請參閱 [GitHub](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/cross_service/stepfunctions_messenger) 上的完整範例。  

**此範例中使用的服務**
+ DynamoDB
+ Lambda
+ Amazon SQS
+ 步驟函數

------

# 使用 Amazon Bedrock 和 Step Functions，建置和協調生成式 AI 應用程式
<a name="sfn_example_cross_ServerlessPromptChaining_section"></a>

下列程式碼範例示範如何使用 Amazon Bedrock 和 Step Functions，建置和協調生成式 AI 應用程式。

------
#### [ Python ]

**適用於 Python 的 SDK (Boto3)**  
 Amazon Bedrock Serverless 提示鏈接案例展示，[AWS Step Functions](https://docs.aws.amazon.com/step-functions/latest/dg/welcome.html)、[Amazon Bedrock](https://docs.aws.amazon.com/bedrock/latest/userguide/what-is-bedrock.html) 和 [https://docs.aws.amazon.com/bedrock/latest/userguide/agents.html](https://docs.aws.amazon.com/bedrock/latest/userguide/agents.html) 如何用於建置和協調複雜、無伺服器和可高度擴展的生成式 AI 應用程式。該案例包含下列工作範例：  
+  針對文獻部落格撰寫指定小說的分析。此範例描述簡易、循序的提示鏈。
+  產生有關指定主題的簡短故事。此範例描述 AI 如何反覆處理先前產生的項目清單。
+  建立前往指定目的地的週末假期行程。此範例描述如何平行處理多個不同的提示。
+  向擔任電影製片的人類使用者推銷電影創意。此範例描述如何使用不同的推論參數平行處理相同的提示、如何回溯到鏈接的上一個步驟，以及如何將人工輸入包含在工作流程中。
+  根據使用者手上的配料來規劃用餐。此範例描述提示鏈如何整合兩個不同的 AI 對話，其中兩個 AI 角色互相爭論以改善最終結果。
+  尋找並總結目前最熱門的 GitHub 儲存庫。此範例說明鏈接多個與外部 API 互動的 AI 代理程式。
 如需完整的原始碼，以及有關如何設定及執行的指示，請參閱 [GitHub](https://github.com/aws-samples/amazon-bedrock-serverless-prompt-chaining) 上的完整專案。  

**此範例中使用的服務**
+ Amazon Bedrock
+ Amazon Bedrock 執行時期
+ Amazon Bedrock 代理程式
+ Amazon Bedrock 代理程式執行時期
+ 步驟函數

------

# 使用 Step Functions 調用 Lambda 函式
<a name="sfn_example_cross_ServerlessWorkflows_section"></a>

下列程式碼範例示範如何建立依序叫用 AWS Lambda 函數 AWS Step Functions 的狀態機器。

------
#### [ Java ]

**適用於 Java 2.x 的 SDK**  
 顯示如何使用 AWS Step Functions 和 建立無 AWS 伺服器工作流程 AWS SDK for Java 2.x。每個工作流程步驟都是使用 AWS Lambda 函數實作。  
 如需完整的原始碼和如何設定及執行的指示，請參閱 [GitHub](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/usecases/creating_workflows_stepfunctions) 上的完整範例。  

**此範例中使用的服務**
+ DynamoDB
+ Lambda
+ Amazon SES
+ 步驟函數

------