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.job;
  
  import alluxio.Client;
  import alluxio.exception.AlluxioException;
  import alluxio.exception.ConnectionFailedException;
  import alluxio.grpc.JobCommand;
  import alluxio.grpc.JobInfo;
  import alluxio.job.wire.JobWorkerHealth;
  import alluxio.wire.WorkerNetAddress;
  
  import java.io.IOException;
  import java.util.List;
  
  /**
   * Interface for job service workers to communicate with the job master.
   */
  public interface JobMasterClient extends Client {
  
    /**
     * Factory for {@link JobMasterClient}.
     */
    class Factory {
  
      private Factory() {} // prevent instantiation
  
      /**
       * Factory method for {@link JobMasterClient}.
       *
       * @param conf job master client configuration
       * @return a new {@link JobMasterClient} instance
       */
      public static JobMasterClient create(JobMasterClientContext conf) {
        return new RetryHandlingJobMasterClient(conf);
      }
    }
  
    /**
     * Returns a worker id for a workers net address.
     *
     * @param address the net address to get a worker id for
     * @return a worker id
     * @throws ConnectionFailedException if network connection failed
     * @throws IOException if an I/O error occurs
     */
    long registerWorker(final WorkerNetAddress address) throws IOException, ConnectionFailedException;
  
    /**
     * Periodic heartbeats to update the tasks' status from a worker, and returns the commands.
     *
     * @param jobWorkerHealth the job worker info
     * @param taskInfoList the list of the task information
     * @return the commands issued to the worker
     * @throws AlluxioException if an Alluxio error occurs
     * @throws IOException if an I/O error occurs
     */
    List<JobCommand> heartbeat(final JobWorkerHealth jobWorkerHealth,
        final List<JobInfo> taskInfoList) throws AlluxioException, IOException;
  }
  