问如何使用Java代码将作业提交给Flink集群？

EN

// import org.apache.flink.api.common.JobSubmissionResult;
// import org.apache.flink.client.deployment.StandaloneClusterId;
// import org.apache.flink.client.program.PackagedProgram;
// import org.apache.flink.client.program.rest.RestClusterClient;
// import org.apache.flink.configuration.Configuration;
// import org.apache.flink.configuration.JobManagerOptions;
// import org.apache.flink.configuration.RestOptions;

String clusterHost = "localhost";
int clusterPort = 8081;

Configuration config = new Configuration();
config.setString(JobManagerOptions.ADDRESS, clusterHost);
config.setInteger(RestOptions.PORT, clusterPort);

String jarFilePath = "/opt/flink/examples/streaming/SocketWindowWordCount.jar";
String[] args = new String[]{ "--port", "9000" };
PackagedProgram packagedProgram = new PackagedProgram(new File(jarFilePath), args);

RestClusterClient<StandaloneClusterId> client =
         new RestClusterClient<StandaloneClusterId>(config, StandaloneClusterId.getInstance());

int parallelism = 1;
JobSubmissionResult result = client.run(packagedProgram,  parallelism);

private static final int PARALLELISM = 8;
private static final Configuration FLINK_CONFIG = new Configuration();

void foo() throws Exception {
    FLINK_CONFIG.setString(JobManagerOptions.ADDRESS, "localhost");
    FLINK_CONFIG.setInteger(RestOptions.PORT, 8081);
    FLINK_CONFIG.setInteger(RestOptions.RETRY_MAX_ATTEMPTS, 3);

    RestClusterClient<StandaloneClusterId> flinkClient = new RestClusterClient<>(FLINK_CONFIG, StandaloneClusterId.getInstance());

    String jar = "/path/to/jar";
    String[] args = new String[]{"..."};
    PackagedProgram program = PackagedProgram.newBuilder()
            .setJarFile(new File(jar))
            .setArguments(args)
            .build();

    JobGraph jobGraph = PackagedProgramUtils.createJobGraph(program, FLINK_CONFIG, PARALLELISM, false);

    JobID jobId = flinkClient.submitJob(jobGraph).get();
    ...
}