content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.worker;
  
  import alluxio.ProcessUtils;
  import alluxio.RuntimeConstants;
  import alluxio.conf.Configuration;
  import alluxio.grpc.Scope;
  import alluxio.master.MasterInquireClient;
  import alluxio.retry.RetryUtils;
  import alluxio.security.user.ServerUserState;
  import alluxio.util.CommonUtils;
  import alluxio.util.ConfigurationUtils;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * Entry point for the Alluxio worker.
   */
  @ThreadSafe
  public final class AlluxioJobWorker {
    private static final Logger LOG = LoggerFactory.getLogger(AlluxioJobWorker.class);
  
    /**
     * Starts the Alluxio job worker.
     *
     * @param args command line arguments, should be empty
     */
    public static void main(String[] args) {
      if (args.length != 0) {
        LOG.info("java -cp {} {}", RuntimeConstants.ALLUXIO_JAR,
            AlluxioJobWorker.class.getCanonicalName());
        System.exit(-1);
      }
  
      if (!ConfigurationUtils.masterHostConfigured(Configuration.global())) {
        System.out.println(ConfigurationUtils
            .getMasterHostNotConfiguredMessage("Alluxio job worker"));
        System.exit(1);
      }
  
      if (!ConfigurationUtils.jobMasterHostConfigured(Configuration.global())) {
        System.out.println(ConfigurationUtils
            .getJobMasterHostNotConfiguredMessage("Alluxio job worker"));
        System.exit(1);
      }
  
      CommonUtils.PROCESS_TYPE.set(CommonUtils.ProcessType.JOB_WORKER);
      MasterInquireClient masterInquireClient =
          MasterInquireClient.Factory.create(Configuration.global(), ServerUserState.global());
      try {
        RetryUtils.retry("load cluster default configuration with master", () -> {
          InetSocketAddress masterAddress = masterInquireClient.getPrimaryRpcAddress();
          Configuration.loadClusterDefaults(masterAddress, Scope.WORKER);
        }, RetryUtils.defaultWorkerMasterClientRetry());
      } catch (IOException e) {
        ProcessUtils.fatalError(LOG,
            "Failed to load cluster default configuration for job worker. Please make sure that "
                + "Alluxio master is running: %s", e.toString());
      }
      JobWorkerProcess process;
      try {
        process = JobWorkerProcess.Factory.create();
      } catch (Throwable t) {
        ProcessUtils.fatalError(LOG, t, "Failed to create job worker process");
        // fatalError will exit, so we shouldn't reach here.
        throw t;
      }
  
      ProcessUtils.stopProcessOnShutdown(process);
      ProcessUtils.run(process);
    }
  
    private AlluxioJobWorker() {} // prevent instantiation
  }
  