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 Amazon Bedrock 程式碼範例
<a name="bedrock_code_examples"></a>

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

*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**
+  **[ Amazon Bedrock 使用者指南](https://docs.aws.amazon.com/bedrock/latest/userguide/what-is-bedrock.html)** – Amazon Bedrock 的相關詳細資訊。
+ **[Amazon Bedrock API 參考](https://docs.aws.amazon.com/bedrock/latest/APIReference/welcome.html)** – 所有可用 Amazon Bedrock 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%23bedrock)** – 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](bedrock_code_examples_basics.md)
  + [Hello Amazon Bedrock](bedrock_example_bedrock_Hello_section.md)
  + [動作](bedrock_code_examples_actions.md)
    + [`GetFoundationModel`](bedrock_example_bedrock_GetFoundationModel_section.md)
    + [`ListFoundationModels`](bedrock_example_bedrock_ListFoundationModels_section.md)
+ [案例](bedrock_code_examples_scenarios.md)
  + [使用 Step Functions 協調生成式 AI 應用程式](bedrock_example_cross_ServerlessPromptChaining_section.md)

# 使用 AWS SDKs Amazon Bedrock 基本範例
<a name="bedrock_code_examples_basics"></a>

下列程式碼範例示範如何搭配使用 Amazon Bedrock 的基本功能與 AWS SDK。

**Contents**
+ [Hello Amazon Bedrock](bedrock_example_bedrock_Hello_section.md)
+ [動作](bedrock_code_examples_actions.md)
  + [`GetFoundationModel`](bedrock_example_bedrock_GetFoundationModel_section.md)
  + [`ListFoundationModels`](bedrock_example_bedrock_ListFoundationModels_section.md)

# Hello Amazon Bedrock
<a name="bedrock_example_bedrock_Hello_section"></a>

下列程式碼範例示範如何開始使用 Amazon Bedrock。

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

**適用於 .NET 的 SDK (v4)**  
 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/dotnetv4/Bedrock#code-examples)中設定和執行。

```
using Amazon;
using Amazon.Bedrock;
using Amazon.Bedrock.Model;

namespace BedrockActions;

/// <summary>
/// This example shows how to list foundation models.
/// </summary>
internal class HelloBedrock
{
    /// <summary>
    /// Main method to call the ListFoundationModelsAsync method.
    /// </summary>
    /// <param name="args"> The command line arguments. </param>
    static async Task Main(string[] args)
    {
        // Specify a region endpoint where Amazon Bedrock is available. For a list of supported region see https://docs.aws.amazon.com/bedrock/latest/userguide/what-is-bedrock.html#bedrock-regions
        AmazonBedrockClient bedrockClient = new(RegionEndpoint.USWest2);

        await ListFoundationModelsAsync(bedrockClient);

    }


    /// <summary>
    /// List foundation models.
    /// </summary>
    /// <param name="bedrockClient"> The Amazon Bedrock client. </param>
    private static async Task ListFoundationModelsAsync(AmazonBedrockClient bedrockClient)
    {
        Console.WriteLine("List foundation models with no filter.");

        try
        {
            var response = await bedrockClient.ListFoundationModelsAsync(new ListFoundationModelsRequest()
            {
            });

            if (response?.HttpStatusCode == System.Net.HttpStatusCode.OK)
            {
                foreach (var fm in response.ModelSummaries)
                {
                    WriteToConsole(fm);
                }
            }
            else
            {
                Console.WriteLine("Something wrong happened");
            }
        }
        catch (AmazonBedrockException e)
        {
            Console.WriteLine(e.Message);
        }
    }


    /// <summary>
    /// Write the foundation model summary to console.
    /// </summary>
    /// <param name="foundationModel"> The foundation model summary to write to console. </param>
    private static void WriteToConsole(FoundationModelSummary foundationModel)
    {
        Console.WriteLine($"{foundationModel.ModelId}, Customization: {string.Join(", ", foundationModel.CustomizationsSupported)}, Stream: {foundationModel.ResponseStreamingSupported}, Input: {string.Join(", ", foundationModel.InputModalities)}, Output: {string.Join(", ", foundationModel.OutputModalities)}");
    }
}
```
+  如需 API 詳細資訊，請參閱*《適用於 .NET 的 AWS SDK API 參考》*中的 [ListFoundationModels](https://docs.aws.amazon.com/goto/DotNetSDKV4/bedrock-2023-04-20/ListFoundationModels)。

------
#### [ Go ]

**SDK for Go V2**  
 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/gov2/bedrock#code-examples)中設定和執行。

```
package main

import (
	"context"
	"fmt"

	"github.com/aws/aws-sdk-go-v2/config"
	"github.com/aws/aws-sdk-go-v2/service/bedrock"
)

const region = "us-east-1"

// main uses the AWS SDK for Go (v2) to create an Amazon Bedrock client and
// list the available foundation models in your account and the chosen region.
// This example uses the default settings specified in your shared credentials
// and config files.
func main() {
	ctx := context.Background()
	sdkConfig, err := config.LoadDefaultConfig(ctx, config.WithRegion(region))
	if err != nil {
		fmt.Println("Couldn't load default configuration. Have you set up your AWS account?")
		fmt.Println(err)
		return
	}
	bedrockClient := bedrock.NewFromConfig(sdkConfig)
	result, err := bedrockClient.ListFoundationModels(ctx, &bedrock.ListFoundationModelsInput{})
	if err != nil {
		fmt.Printf("Couldn't list foundation models. Here's why: %v\n", err)
		return
	}
	if len(result.ModelSummaries) == 0 {
		fmt.Println("There are no foundation models.")
	}
	for _, modelSummary := range result.ModelSummaries {
		fmt.Println(*modelSummary.ModelId)
	}
}
```
+  如需 API 詳細資訊，請參閱*《適用於 Go 的 AWS SDK API 參考》*中的 [ListFoundationModels](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/bedrock#Client.ListFoundationModels)。

------
#### [ 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/bedrock#code-examples)中設定和執行。

```
import { fileURLToPath } from "node:url";

import {
  BedrockClient,
  ListFoundationModelsCommand,
} from "@aws-sdk/client-bedrock";

const REGION = "us-east-1";
const client = new BedrockClient({ region: REGION });

export const main = async () => {
  const command = new ListFoundationModelsCommand({});

  const response = await client.send(command);
  const models = response.modelSummaries;

  console.log("Listing the available Bedrock foundation models:");

  for (const model of models) {
    console.log("=".repeat(42));
    console.log(` Model: ${model.modelId}`);
    console.log("-".repeat(42));
    console.log(` Name: ${model.modelName}`);
    console.log(` Provider: ${model.providerName}`);
    console.log(` Model ARN: ${model.modelArn}`);
    console.log(` Input modalities: ${model.inputModalities}`);
    console.log(` Output modalities: ${model.outputModalities}`);
    console.log(` Supported customizations: ${model.customizationsSupported}`);
    console.log(` Supported inference types: ${model.inferenceTypesSupported}`);
    console.log(` Lifecycle status: ${model.modelLifecycle.status}`);
    console.log(`${"=".repeat(42)}\n`);
  }

  const active = models.filter(
    (m) => m.modelLifecycle.status === "ACTIVE",
  ).length;
  const legacy = models.filter(
    (m) => m.modelLifecycle.status === "LEGACY",
  ).length;

  console.log(
    `There are ${active} active and ${legacy} legacy foundation models in ${REGION}.`,
  );

  return response;
};

// Invoke main function if this file was run directly.
if (process.argv[1] === fileURLToPath(import.meta.url)) {
  await main();
}
```
+  如需 API 詳細資訊，請參閱*《適用於 JavaScript 的 AWS SDK API 參考》*中的 [ListFoundationModels](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/bedrock/command/ListFoundationModelsCommand)。

------
#### [ 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/bedrock#code-examples)中設定和執行。

```
"""
Lists the available Amazon Bedrock models.
"""
import logging
import json
import boto3


from botocore.exceptions import ClientError


logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)


def list_foundation_models(bedrock_client):
    """
    Gets a list of available Amazon Bedrock foundation models.

    :return: The list of available bedrock foundation models.
    """

    try:
        response = bedrock_client.list_foundation_models()
        models = response["modelSummaries"]
        logger.info("Got %s foundation models.", len(models))
        return models

    except ClientError:
        logger.error("Couldn't list foundation models.")
        raise


def main():
    """Entry point for the example. Uses the AWS SDK for Python (Boto3)
    to create an Amazon Bedrock client. Then lists the available Bedrock models
    in the region set in the callers profile and credentials.
    """

    bedrock_client = boto3.client(service_name="bedrock")

    fm_models = list_foundation_models(bedrock_client)
    for model in fm_models:
        print(f"Model: {model['modelName']}")
        print(json.dumps(model, indent=2))
        print("---------------------------\n")

    logger.info("Done.")


if __name__ == "__main__":
    main()
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [ListFoundationModels](https://docs.aws.amazon.com/goto/boto3/bedrock-2023-04-20/ListFoundationModels)。

------
#### [ Swift ]

**適用於 Swift 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/swift/example_code/bedrock#code-examples)中設定和執行。

```
import ArgumentParser
import AWSClientRuntime
import Foundation

import AWSBedrock

struct ExampleCommand: ParsableCommand {
    static var configuration = CommandConfiguration(
        commandName: "ListFoundationModels",
        abstract: """
        This example demonstrates how to retrieve a list of the available
        foundation models from Amazon Bedrock.
        """,
        discussion: """
        """
    )

    /// Construct a string listing the specified modalities.
    /// 
    /// - Parameter modalities: An array of the modalities to list.
    ///
    /// - Returns: A string with a human-readable list of modalities.
    func buildModalityList(modalities: [BedrockClientTypes.ModelModality]?) -> String {
        var first = true
        var str = ""

        if modalities == nil {
            return "<none>"
        }

        for modality in modalities! {
            if !first {
                str += ", "
            }
            first = false
            str += modality.rawValue
        }

        return str
    }

    /// Construct a string listing the specified customizations.
    /// 
    /// - Parameter customizations: An array of the customizations to list.
    /// 
    /// - Returns: A string listing the customizations.
    func buildCustomizationList(customizations: [BedrockClientTypes.ModelCustomization]?) -> String {
        var first = true
        var str = ""

        if customizations == nil {
            return "<none>"
        }

        for customization in customizations! {
            if !first {
                str += ", "
            }
            first = false
            str += customization.rawValue
        }

        return str
    }

    /// Construct a string listing the specified inferences.
    /// 
    /// - Parameter inferences: An array of inferences to list.
    /// 
    /// - Returns: A string listing the specified inferences.
    func buildInferenceList(inferences: [BedrockClientTypes.InferenceType]?) -> String {
        var first = true
        var str = ""

        if inferences == nil {
            return "<none>"
        }

        for inference in inferences! {
            if !first {
                str += ", "
            }
            first = false
            str += inference.rawValue
        }

        return str
    }

    /// Called by ``main()`` to run the bulk of the example.
    func runAsync() async throws {
        // Always use the Region "us-east-1" to have access to the most models.
        let config = try await BedrockClient.BedrockClientConfiguration(region: "us-east-1")
        let bedrockClient = BedrockClient(config: config)

        let output = try await bedrockClient.listFoundationModels(
            input: ListFoundationModelsInput()
        )

        guard let summaries = output.modelSummaries else {
            print("No models returned.")
            return
        }
        
        // Output a list of the models with their details.
        for summary in summaries {
            print("==========================================")
            print(" Model ID: \(summary.modelId ?? "<unknown>")")
            print("------------------------------------------")
            print(" Name: \(summary.modelName ?? "<unknown>")")
            print(" Provider: \(summary.providerName ?? "<unknown>")")
            print(" Input modalities: \(buildModalityList(modalities: summary.inputModalities))")
            print(" Output modalities: \(buildModalityList(modalities: summary.outputModalities))")
            print(" Supported customizations: \(buildCustomizationList(customizations: summary.customizationsSupported ))")
            print(" Supported inference types: \(buildInferenceList(inferences: summary.inferenceTypesSupported))")
            print("------------------------------------------\n")
        }
        
        print("\(summaries.count) models available.")
    }
}

/// The program's asynchronous entry point.
@main
struct Main {
    static func main() async {
        let args = Array(CommandLine.arguments.dropFirst())

        do {
            let command = try ExampleCommand.parse(args)
            try await command.runAsync()
        } catch {
            ExampleCommand.exit(withError: error)
        }
    }    
}
```
+  如需 API 詳細資訊，請參閱《適用於 Swift 的AWS SDK API 參考》**中的 [ListFoundationModels](https://sdk.amazonaws.com/swift/api/awsbedrock/latest/documentation/awsbedrock/bedrockclient/listfoundationmodels(input:))。

------

# 使用 AWS SDKs的 Amazon Bedrock 動作
<a name="bedrock_code_examples_actions"></a>

下列程式碼範例示範如何使用 AWS SDKs 執行個別 Amazon Bedrock 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 Amazon Bedrock 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 Amazon Bedrock 案例](bedrock_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《[Amazon Bedrock API 參考](https://docs.aws.amazon.com/bedrock/latest/APIReference/welcome.html)》。

**Topics**
+ [`GetFoundationModel`](bedrock_example_bedrock_GetFoundationModel_section.md)
+ [`ListFoundationModels`](bedrock_example_bedrock_ListFoundationModels_section.md)

# `GetFoundationModel` 搭配 AWS SDK 使用
<a name="bedrock_example_bedrock_GetFoundationModel_section"></a>

下列程式碼範例示範如何使用 `GetFoundationModel`。

------
#### [ 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/bedrock#code-examples)中設定和執行。
使用同步 Amazon Bedrock 用戶端，取得基礎模型的詳細資訊。  

```
    /**
     * Get details about an Amazon Bedrock foundation model.
     *
     * @param bedrockClient   The service client for accessing Amazon Bedrock.
     * @param modelIdentifier The model identifier.
     * @return An object containing the foundation model's details.
     */
    public static FoundationModelDetails getFoundationModel(BedrockClient bedrockClient, String modelIdentifier) {
        try {
            GetFoundationModelResponse response = bedrockClient.getFoundationModel(
                    r -> r.modelIdentifier(modelIdentifier)
            );

            FoundationModelDetails model = response.modelDetails();

            System.out.println(" Model ID:                     " + model.modelId());
            System.out.println(" Model ARN:                    " + model.modelArn());
            System.out.println(" Model Name:                   " + model.modelName());
            System.out.println(" Provider Name:                " + model.providerName());
            System.out.println(" Lifecycle status:             " + model.modelLifecycle().statusAsString());
            System.out.println(" Input modalities:             " + model.inputModalities());
            System.out.println(" Output modalities:            " + model.outputModalities());
            System.out.println(" Supported customizations:     " + model.customizationsSupported());
            System.out.println(" Supported inference types:    " + model.inferenceTypesSupported());
            System.out.println(" Response streaming supported: " + model.responseStreamingSupported());

            return model;

        } catch (ValidationException e) {
            throw new IllegalArgumentException(e.getMessage());
        } catch (SdkException e) {
            System.err.println(e.getMessage());
            throw new RuntimeException(e);
        }
    }
```
使用非同步 Amazon Bedrock 用戶端，取得基礎模型的詳細資訊。  

```
    /**
     * Get details about an Amazon Bedrock foundation model.
     *
     * @param bedrockClient   The async service client for accessing Amazon Bedrock.
     * @param modelIdentifier The model identifier.
     * @return An object containing the foundation model's details.
     */
    public static FoundationModelDetails getFoundationModel(BedrockAsyncClient bedrockClient, String modelIdentifier) {
        try {
            CompletableFuture<GetFoundationModelResponse> future = bedrockClient.getFoundationModel(
                    r -> r.modelIdentifier(modelIdentifier)
            );

            FoundationModelDetails model = future.get().modelDetails();

            System.out.println(" Model ID:                     " + model.modelId());
            System.out.println(" Model ARN:                    " + model.modelArn());
            System.out.println(" Model Name:                   " + model.modelName());
            System.out.println(" Provider Name:                " + model.providerName());
            System.out.println(" Lifecycle status:             " + model.modelLifecycle().statusAsString());
            System.out.println(" Input modalities:             " + model.inputModalities());
            System.out.println(" Output modalities:            " + model.outputModalities());
            System.out.println(" Supported customizations:     " + model.customizationsSupported());
            System.out.println(" Supported inference types:    " + model.inferenceTypesSupported());
            System.out.println(" Response streaming supported: " + model.responseStreamingSupported());

            return model;

        } catch (ExecutionException e) {
            if (e.getMessage().contains("ValidationException")) {
                throw new IllegalArgumentException(e.getMessage());
            } else {
                System.err.println(e.getMessage());
                throw new RuntimeException(e);
            }
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            System.err.println(e.getMessage());
            throw new RuntimeException(e);
        }
    }
```
+  如需 API 詳細資訊，請參閱《*AWS SDK for Java 2.x API 參考*》中的 [GetFoundationModel](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-2023-04-20/GetFoundationModel)。

------
#### [ 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/bedrock#code-examples)中設定和執行。
取得基礎模型的詳細資訊。  

```
import { fileURLToPath } from "node:url";

import {
  BedrockClient,
  GetFoundationModelCommand,
} from "@aws-sdk/client-bedrock";

/**
 * Get details about an Amazon Bedrock foundation model.
 *
 * @return {FoundationModelDetails} - The list of available bedrock foundation models.
 */
export const getFoundationModel = async () => {
  const client = new BedrockClient();

  const command = new GetFoundationModelCommand({
    modelIdentifier: "amazon.titan-embed-text-v1",
  });

  const response = await client.send(command);

  return response.modelDetails;
};

// Invoke main function if this file was run directly.
if (process.argv[1] === fileURLToPath(import.meta.url)) {
  const model = await getFoundationModel();
  console.log(model);
}
```
+  如需 API 詳細資訊，請參閱《*適用於 JavaScript 的 AWS SDK API 參考*》中的 [GetFoundationModel](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/bedrock/command/GetFoundationModelCommand)。

------
#### [ 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/bedrock#code-examples)中設定和執行。
取得基礎模型的詳細資訊。  

```
    def get_foundation_model(self, model_identifier):
        """
        Get details about an Amazon Bedrock foundation model.

        :return: The foundation model's details.
        """

        try:
            return self.bedrock_client.get_foundation_model(
                modelIdentifier=model_identifier
            )["modelDetails"]
        except ClientError:
            logger.error(
                f"Couldn't get foundation models details for {model_identifier}"
            )
            raise
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [GetFoundationModel](https://docs.aws.amazon.com/goto/boto3/bedrock-2023-04-20/GetFoundationModel)。

------

# `ListFoundationModels` 搭配 AWS SDK 使用
<a name="bedrock_example_bedrock_ListFoundationModels_section"></a>

下列程式碼範例示範如何使用 `ListFoundationModels`。

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

**適用於 .NET 的 SDK (v4)**  
 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/dotnetv4/Bedrock#code-examples)中設定和執行。
列出可用的 Bedrock 基礎模型。  

```
    /// <summary>
    /// List foundation models.
    /// </summary>
    /// <param name="bedrockClient"> The Amazon Bedrock client. </param>
    private static async Task ListFoundationModelsAsync(AmazonBedrockClient bedrockClient)
    {
        Console.WriteLine("List foundation models with no filter.");

        try
        {
            var response = await bedrockClient.ListFoundationModelsAsync(new ListFoundationModelsRequest()
            {
            });

            if (response?.HttpStatusCode == System.Net.HttpStatusCode.OK)
            {
                foreach (var fm in response.ModelSummaries)
                {
                    WriteToConsole(fm);
                }
            }
            else
            {
                Console.WriteLine("Something wrong happened");
            }
        }
        catch (AmazonBedrockException e)
        {
            Console.WriteLine(e.Message);
        }
    }
```
+  如需 API 詳細資訊，請參閱《適用於 .NET 的 AWS SDK API 參考》**中的 [ListFoundationModels](https://docs.aws.amazon.com/goto/DotNetSDKV4/bedrock-2023-04-20/ListFoundationModels)。

------
#### [ Go ]

**SDK for Go V2**  
 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/gov2/bedrock#code-examples)中設定和執行。
列出可用的 Bedrock 基礎模型。  

```
import (
	"context"
	"log"

	"github.com/aws/aws-sdk-go-v2/service/bedrock"
	"github.com/aws/aws-sdk-go-v2/service/bedrock/types"
)

// FoundationModelWrapper encapsulates Amazon Bedrock actions used in the examples.
// It contains a Bedrock service client that is used to perform foundation model actions.
type FoundationModelWrapper struct {
	BedrockClient *bedrock.Client
}



// ListPolicies lists Bedrock foundation models that you can use.
func (wrapper FoundationModelWrapper) ListFoundationModels(ctx context.Context) ([]types.FoundationModelSummary, error) {

	var models []types.FoundationModelSummary

	result, err := wrapper.BedrockClient.ListFoundationModels(ctx, &bedrock.ListFoundationModelsInput{})

	if err != nil {
		log.Printf("Couldn't list foundation models. Here's why: %v\n", err)
	} else {
		models = result.ModelSummaries
	}
	return models, err
}
```
+  如需 API 詳細資訊，請參閱《適用於 Go 的 AWS SDK API 參考》**中的 [ListFoundationModels](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/bedrock#Client.ListFoundationModels)。

------
#### [ 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/bedrock#code-examples)中設定和執行。
使用同步 Amazon Bedrock 用戶端，列出可用的 Amazon Bedrock 基礎模型。  

```
    /**
     * Lists Amazon Bedrock foundation models that you can use.
     * You can filter the results with the request parameters.
     *
     * @param bedrockClient The service client for accessing Amazon Bedrock.
     * @return A list of objects containing the foundation models' details
     */
    public static List<FoundationModelSummary> listFoundationModels(BedrockClient bedrockClient) {

        try {
            ListFoundationModelsResponse response = bedrockClient.listFoundationModels(r -> {});

            List<FoundationModelSummary> models = response.modelSummaries();

            if (models.isEmpty()) {
                System.out.println("No available foundation models in " + region.toString());
            } else {
                for (FoundationModelSummary model : models) {
                    System.out.println("Model ID: " + model.modelId());
                    System.out.println("Provider: " + model.providerName());
                    System.out.println("Name:     " + model.modelName());
                    System.out.println();
                }
            }

            return models;

        } catch (SdkClientException e) {
            System.err.println(e.getMessage());
            throw new RuntimeException(e);
        }
    }
```
使用非同步 Amazon Bedrock 用戶端，列出可用的 Amazon Bedrock 基礎模型。  

```
    /**
     * Lists Amazon Bedrock foundation models that you can use.
     * You can filter the results with the request parameters.
     *
     * @param bedrockClient The async service client for accessing Amazon Bedrock.
     * @return A list of objects containing the foundation models' details
     */
    public static List<FoundationModelSummary> listFoundationModels(BedrockAsyncClient bedrockClient) {
        try {
            CompletableFuture<ListFoundationModelsResponse> future = bedrockClient.listFoundationModels(r -> {});

            List<FoundationModelSummary> models = future.get().modelSummaries();

            if (models.isEmpty()) {
                System.out.println("No available foundation models in " + region.toString());
            } else {
                for (FoundationModelSummary model : models) {
                    System.out.println("Model ID: " + model.modelId());
                    System.out.println("Provider: " + model.providerName());
                    System.out.println("Name:     " + model.modelName());
                    System.out.println();
                }
            }

            return models;

        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            System.err.println(e.getMessage());
            throw new RuntimeException(e);
        } catch (ExecutionException e) {
            System.err.println(e.getMessage());
            throw new RuntimeException(e);
        }
    }
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Java 2.x API 參考》**中的 [ListFoundationModels](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-2023-04-20/ListFoundationModels)。

------
#### [ 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/bedrock#code-examples)中設定和執行。
列出可用的基礎模型。  

```
import { fileURLToPath } from "node:url";

import {
  BedrockClient,
  ListFoundationModelsCommand,
} from "@aws-sdk/client-bedrock";

/**
 * List the available Amazon Bedrock foundation models.
 *
 * @return {FoundationModelSummary[]} - The list of available bedrock foundation models.
 */
export const listFoundationModels = async () => {
  const client = new BedrockClient();

  const input = {
    // byProvider: 'STRING_VALUE',
    // byCustomizationType: 'FINE_TUNING' || 'CONTINUED_PRE_TRAINING',
    // byOutputModality: 'TEXT' || 'IMAGE' || 'EMBEDDING',
    // byInferenceType: 'ON_DEMAND' || 'PROVISIONED',
  };

  const command = new ListFoundationModelsCommand(input);

  const response = await client.send(command);

  return response.modelSummaries;
};

// Invoke main function if this file was run directly.
if (process.argv[1] === fileURLToPath(import.meta.url)) {
  const models = await listFoundationModels();
  console.log(models);
}
```
+  如需 API 詳細資訊，請參閱《適用於 JavaScript 的 AWS SDK API 參考》**中的 [ListFoundationModels](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/bedrock/command/ListFoundationModelsCommand)。

------
#### [ 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/bedrock#code-examples)中設定和執行。
列出可用的 Amazon Bedrock 基礎模型。  

```
suspend fun listFoundationModels(): List<FoundationModelSummary>? {
    BedrockClient.fromEnvironment { region = "us-east-1" }.use { bedrockClient ->
        val response = bedrockClient.listFoundationModels(ListFoundationModelsRequest {})
        response.modelSummaries?.forEach { model ->
            println("==========================================")
            println(" Model ID: ${model.modelId}")
            println("------------------------------------------")
            println(" Name: ${model.modelName}")
            println(" Provider: ${model.providerName}")
            println(" Input modalities: ${model.inputModalities}")
            println(" Output modalities: ${model.outputModalities}")
            println(" Supported customizations: ${model.customizationsSupported}")
            println(" Supported inference types: ${model.inferenceTypesSupported}")
            println("------------------------------------------\n")
        }
        return response.modelSummaries
    }
}
```
+  如需 API 詳細資訊，請參閱《適用於 Kotlin 的AWS SDK API 參考》**中的 [ListFoundationModels](https://sdk.amazonaws.com/kotlin/api/latest/index.html)。

------
#### [ PHP ]

**適用於 PHP 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/php/example_code/bedrock#code-examples)中設定和執行。
列出可用的 Amazon Bedrock 基礎模型。  

```
    public function listFoundationModels()
    {
        $bedrockClient = new BedrockClient([
            'region' => 'us-west-2',
            'profile' => 'default'
        ]);
        $response = $bedrockClient->listFoundationModels();
        return $response['modelSummaries'];
    }
```
+  如需 API 詳細資訊，請參閱《適用於 PHP 的 AWS SDK API 參考》**中的 [ListFoundationModels](https://docs.aws.amazon.com/goto/SdkForPHPV3/bedrock-2023-04-20/ListFoundationModels)。

------
#### [ 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/bedrock#code-examples)中設定和執行。
列出可用的 Amazon Bedrock 基礎模型。  

```
    def list_foundation_models(self):
        """
        List the available Amazon Bedrock foundation models.

        :return: The list of available bedrock foundation models.
        """

        try:
            response = self.bedrock_client.list_foundation_models()
            models = response["modelSummaries"]
            logger.info("Got %s foundation models.", len(models))
            return models

        except ClientError:
            logger.error("Couldn't list foundation models.")
            raise
```
+  如需 API 詳細資訊，請參閱《AWS SDK for Python (Boto3) API 參考》**中的 [ListFoundationModels](https://docs.aws.amazon.com/goto/boto3/bedrock-2023-04-20/ListFoundationModels)。

------
#### [ Swift ]

**適用於 Swift 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/swift/example_code/bedrock#code-examples)中設定和執行。

```
import AWSBedrock

        // Always use the Region "us-east-1" to have access to the most models.
        let config = try await BedrockClient.BedrockClientConfiguration(region: "us-east-1")
        let bedrockClient = BedrockClient(config: config)

        let output = try await bedrockClient.listFoundationModels(
            input: ListFoundationModelsInput()
        )

        guard let summaries = output.modelSummaries else {
            print("No models returned.")
            return
        }
        
        // Output a list of the models with their details.
        for summary in summaries {
            print("==========================================")
            print(" Model ID: \(summary.modelId ?? "<unknown>")")
            print("------------------------------------------")
            print(" Name: \(summary.modelName ?? "<unknown>")")
            print(" Provider: \(summary.providerName ?? "<unknown>")")
            print(" Input modalities: \(buildModalityList(modalities: summary.inputModalities))")
            print(" Output modalities: \(buildModalityList(modalities: summary.outputModalities))")
            print(" Supported customizations: \(buildCustomizationList(customizations: summary.customizationsSupported ))")
            print(" Supported inference types: \(buildInferenceList(inferences: summary.inferenceTypesSupported))")
            print("------------------------------------------\n")
        }
```
+  如需 API 詳細資訊，請參閱《適用於 Swift 的AWS SDK API 參考》**中的 [ListFoundationModels](https://sdk.amazonaws.com/swift/api/awsbedrock/latest/documentation/awsbedrock/bedrockclient/listfoundationmodels(input:))。

------

# 使用 AWS SDKs Amazon Bedrock 案例
<a name="bedrock_code_examples_scenarios"></a>

下列程式碼範例示範如何在 Amazon Bedrock AWS SDKs 中實作常見案例。這些案例向您示範如何呼叫 Amazon Bedrock 中的多個函數或與其他 AWS 服務組合，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**
+ [使用 Step Functions 協調生成式 AI 應用程式](bedrock_example_cross_ServerlessPromptChaining_section.md)

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

------