There are more AWS SDK examples available in the [AWS Doc SDK Examples](https://github.com/awsdocs/aws-doc-sdk-examples) GitHub repo.

# Use `StartMatchingJob` with an AWS SDK
<a name="entityresolution_example_entityresolution_StartMatchingJob_section"></a>

The following code examples show how to use `StartMatchingJob`.

Action examples are code excerpts from larger programs and must be run in context. You can see this action in context in the following code example: 
+  [Learn the basics](entityresolution_example_entityresolution_Scenario_section.md) 

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

**SDK for Java 2.x**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/entityresolution#code-examples). 

```
    /**
     * Starts a matching job asynchronously for the specified workflow name.
     *
     * @param workflowName the name of the workflow for which to start the matching job
     * @return a {@link CompletableFuture} that completes with the job ID of the started matching job, or an empty
     * string if the operation fails
     */
    public CompletableFuture<String> startMatchingJobAsync(String workflowName) {
        StartMatchingJobRequest jobRequest = StartMatchingJobRequest.builder()
            .workflowName(workflowName)
            .build();

        return getResolutionAsyncClient().startMatchingJob(jobRequest)
            .whenComplete((response, exception) -> {
                if (response != null) {
                    String jobId = response.jobId();
                    logger.info("Job ID: " + jobId);
                } else {
                    if (exception == null) {
                        throw new CompletionException("An unknown error occurred while starting the job.", null);
                    }

                    Throwable cause = exception.getCause();
                    if (cause instanceof ConflictException) {
                        throw new CompletionException("The job is already running. Resolve conflicts before starting a new job.", cause);
                    }

                    // Wrap other AWS exceptions in a CompletionException.
                    throw new CompletionException("Failed to start the job: " + exception.getMessage(), exception);
                }
            })
            .thenApply(response -> response != null ? response.jobId() : "");
    }
```
+  For API details, see [StartMatchingJob](https://docs.aws.amazon.com/goto/SdkForJavaV2/entityresolution-2018-05-10/StartMatchingJob) in *AWS SDK for Java 2.x API Reference*. 

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

**SDK for JavaScript (v3)**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javascriptv3/example_code/entityresolution#code-examples). 

```
//The default inputs for this demo are read from the ../inputs.json.

import { fileURLToPath } from "node:url";
import {
  StartMatchingJobCommand,
  EntityResolutionClient,
} from "@aws-sdk/client-entityresolution";
import data from "../inputs.json" with { type: "json" };

const region = "eu-west-1";
const erClient = new EntityResolutionClient({ region: region });

export const main = async () => {
  const matchingJobOfWorkflowParams = {
    workflowName: `${data.inputs.workflowName}`,
  };
  try {
    const command = new StartMatchingJobCommand(matchingJobOfWorkflowParams);
    const response = await erClient.send(command);
    console.log(`Job ID: ${response.jobID} \n
The matching job was successfully started.`);
  } catch (caught) {
    console.error(caught.message);
    throw caught;
  }
};
```
+  For API details, see [StartMatchingJob](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/entityresolution/command/StartMatchingJobCommand) in *AWS SDK for JavaScript API Reference*. 

------