D'autres exemples de AWS SDK sont disponibles dans le référentiel [AWS Doc SDK Examples](https://github.com/awsdocs/aws-doc-sdk-examples) GitHub .

Les traductions sont fournies par des outils de traduction automatique. En cas de conflit entre le contenu d'une traduction et celui de la version originale en anglais, la version anglaise prévaudra.

# Bonjour Amazon Neptune
<a name="neptune_example_neptune_Hello_section"></a>

Les exemples de code suivants montrent comment démarrer avec Neptune.

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#### [ Java ]

**SDK pour Java 2.x**  
 Il y en a plus à ce sujet GitHub. Trouvez l’exemple complet et découvrez comment le configurer et l’exécuter dans le [référentiel d’exemples de code AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/neptune#code-examples). 

```
/**
 * 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 HelloNeptune {
    public static void main(String[] args) {
        NeptuneAsyncClient neptuneClient = NeptuneAsyncClient.create();
        describeDbCluster(neptuneClient).join(); // This ensures the async code runs to completion
    }

    /**
     * Describes the Amazon Neptune DB clusters.
     *
     * @param neptuneClient the Neptune asynchronous client used to make the request
     * @return a {@link CompletableFuture} that completes when the operation is finished
     */
    public static CompletableFuture<Void> describeDbCluster(NeptuneAsyncClient neptuneClient) {
        DescribeDbClustersRequest request = DescribeDbClustersRequest.builder()
                .maxRecords(20)
                .build();

        SdkPublisher<DescribeDbClustersResponse> paginator = neptuneClient.describeDBClustersPaginator(request);
        CompletableFuture<Void> future = new CompletableFuture<>();

        paginator.subscribe(new Subscriber<DescribeDbClustersResponse>() {
            private Subscription subscription;

            @Override
            public void onSubscribe(Subscription s) {
                this.subscription = s;
                s.request(Long.MAX_VALUE); // request all items
            }

            @Override
            public void onNext(DescribeDbClustersResponse response) {
                response.dbClusters().forEach(cluster -> {
                    System.out.println("Cluster Identifier: " + cluster.dbClusterIdentifier());
                    System.out.println("Status: " + cluster.status());
                });
            }

            @Override
            public void onError(Throwable t) {
                future.completeExceptionally(t);
            }

            @Override
            public void onComplete() {
                future.complete(null);
            }
        });

        return future.whenComplete((result, throwable) -> {
            neptuneClient.close();
            if (throwable != null) {
                System.err.println("Error describing DB clusters: " + throwable.getMessage());
            }
        });
    }
```
+  Pour plus de détails sur l'API, voir [Décrire le DBClusters paginateur dans la référence](https://docs.aws.amazon.com/goto/SdkForJavaV2/neptune-2014-10-31/DescribeDBClustersPaginator) des *AWS SDK for Java 2.x API*. 

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

**Kit SDK for Python (Boto3)**  
 Il y en a plus à ce sujet GitHub. Trouvez l’exemple complet et découvrez comment le configurer et l’exécuter dans le [référentiel d’exemples de code AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/neptune#code-examples). 

```
import boto3
from botocore.exceptions import ClientError


def describe_db_clusters(neptune_client):
    """
    Describes the Amazon Neptune DB clusters using a paginator to handle multiple pages.
    Raises ClientError with 'ResourceNotFoundException' if no clusters are found.
    """
    paginator = neptune_client.get_paginator("describe_db_clusters")
    clusters_found = False

    for page in paginator.paginate():
        for cluster in page.get("DBClusters", []):
            clusters_found = True
            print(f"Cluster Identifier: {cluster['DBClusterIdentifier']}")
            print(f"Status: {cluster['Status']}")

    if not clusters_found:
        raise ClientError(
            {
                "Error": {
                    "Code": "ResourceNotFoundException",
                    "Message": "No Neptune DB clusters found."
                }
            },
            operation_name="DescribeDBClusters"
        )

def main():
    """
    Main entry point: creates the Neptune client and calls the describe operation.
    """
    neptune_client = boto3.client("neptune")
    try:
        describe_db_clusters(neptune_client)
    except ClientError as e:
        error_code = e.response["Error"]["Code"]
        if error_code == "ResourceNotFoundException":
            print(f"Resource not found: {e.response['Error']['Message']}")
        else:
            print(f"Unexpected ClientError: {e.response['Error']['Message']}")
    except Exception as e:
        print(f"Unexpected error: {str(e)}")

if __name__ == "__main__":
    main()
```
+  Pour plus de détails sur l'API, consultez le [manuel de référence de l'API Describe DBClusters Paginator](https://docs.aws.amazon.com/goto/boto3/neptune-2014-10-31/DescribeDBClustersPaginator) in *AWS SDK for Python (Boto3)*. 

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