Hello AWS Batch

L’esempio di codice seguente mostra come iniziare a utilizzare AWS Batch.

Java

SDK per Java 2.x

Nota

Ulteriori informazioni su GitHub. Trova l’esempio completo e scopri di più sulla configurazione e l’esecuzione nel Repository di esempi di codice AWS.

import software.amazon.awssdk.core.client.config.ClientOverrideConfiguration;
import software.amazon.awssdk.core.retry.RetryPolicy;
import software.amazon.awssdk.http.async.SdkAsyncHttpClient;
import software.amazon.awssdk.http.nio.netty.NettyNioAsyncHttpClient;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.batch.BatchAsyncClient;
import software.amazon.awssdk.services.batch.model.JobStatus;
import software.amazon.awssdk.services.batch.model.JobSummary;
import software.amazon.awssdk.services.batch.model.ListJobsRequest;
import software.amazon.awssdk.services.batch.paginators.ListJobsPublisher;
import java.time.Duration;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CompletableFuture;

public class HelloBatch {
    private static BatchAsyncClient batchClient;

    public static void main(String[] args) {
        List<JobSummary> jobs = listJobs("my-job-queue");
        jobs.forEach(job ->
            System.out.printf("Job ID: %s, Job Name: %s, Job Status: %s%n",
                job.jobId(), job.jobName(), job.status())
        );
    }

    public static List<JobSummary> listJobs(String jobQueue) {
        if (jobQueue == null || jobQueue.isEmpty()) {
            throw new IllegalArgumentException("Job queue cannot be null or empty");
        }

        ListJobsRequest listJobsRequest = ListJobsRequest.builder()
            .jobQueue(jobQueue)
            .jobStatus(JobStatus.SUCCEEDED)
            .build();

        List<JobSummary> jobSummaries = new ArrayList<>();
        ListJobsPublisher listJobsPaginator = getAsyncClient().listJobsPaginator(listJobsRequest);
        CompletableFuture<Void> future = listJobsPaginator.subscribe(response -> {
            jobSummaries.addAll(response.jobSummaryList());
        });

        future.join();
        return jobSummaries;
    }

    private static BatchAsyncClient getAsyncClient() {
        SdkAsyncHttpClient httpClient = NettyNioAsyncHttpClient.builder()
            .maxConcurrency(100)  // Increase max concurrency to handle more simultaneous connections.
            .connectionTimeout(Duration.ofSeconds(60))  // Set the connection timeout.
            .readTimeout(Duration.ofSeconds(60))  // Set the read timeout.
            .writeTimeout(Duration.ofSeconds(60))  // Set the write timeout.
            .build();

        ClientOverrideConfiguration overrideConfig = ClientOverrideConfiguration.builder()
            .apiCallTimeout(Duration.ofMinutes(2))  // Set the overall API call timeout.
            .apiCallAttemptTimeout(Duration.ofSeconds(90))  // Set the individual call attempt timeout.
            .retryPolicy(RetryPolicy.builder()  // Add a retry policy to handle transient errors.
                .numRetries(3)  // Number of retry attempts.
                .build())
            .build();

        if (batchClient == null) {
            batchClient = BatchAsyncClient.builder()
                .region(Region.US_EAST_1)
                .httpClient(httpClient)
                .overrideConfiguration(overrideConfig)
                .build();
        }
        return batchClient;
    }
}

• Per informazioni dettagliate sull’API, consulta listJobsPaginator nella documentazione di riferimento dell’API AWS SDK for Java 2.x.