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.job.plan.replicate;
  
  import alluxio.AlluxioURI;
  import alluxio.client.job.JobMasterClient;
  import alluxio.client.job.JobMasterClientPool;
  import alluxio.exception.AlluxioException;
  import alluxio.exception.status.NotFoundException;
  import alluxio.grpc.ListAllPOptions;
  import alluxio.job.wire.Status;
  
  import java.io.IOException;
  import java.util.List;
  import java.util.Set;
  import java.util.stream.Collectors;
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * The implementation of {@link ReplicationHandler} that utilizes job service.
   */
  @ThreadSafe
  public final class DefaultReplicationHandler implements ReplicationHandler {
    private final JobMasterClientPool mJobMasterClientPool;
  
    /**
     * Creates a new instance of {@link DefaultReplicationHandler}.
     *
     * @param jobMasterClientPool job master client pool
     */
    public DefaultReplicationHandler(JobMasterClientPool jobMasterClientPool) {
      mJobMasterClientPool = jobMasterClientPool;
    }
  
    @Override
    public Status getJobStatus(long jobId) throws IOException {
      final JobMasterClient client = mJobMasterClientPool.acquire();
      try {
        return client.getJobStatus(jobId).getStatus();
      } catch (NotFoundException e) {
        // if the job status doesn't exist, assume the job has failed
        return Status.FAILED;
      } finally {
        mJobMasterClientPool.release(client);
      }
    }
  
    @Override
    public List<Long> findJobs(String jobName, Set<Status> status) throws IOException {
      final JobMasterClient client = mJobMasterClientPool.acquire();
      try {
        return client.list(ListAllPOptions.newBuilder().setName(jobName)
            .addAllStatus(status.stream().map(Status::toProto).collect(Collectors.toSet()))
            .build());
      } finally {
        mJobMasterClientPool.release(client);
      }
    }
  
    @Override
    public long setReplica(AlluxioURI uri, long blockId, int numReplicas)
        throws AlluxioException, IOException {
      JobMasterClient client = mJobMasterClientPool.acquire();
      try {
        return client.run(new SetReplicaConfig(uri.getPath(), blockId, numReplicas));
      } finally {
        mJobMasterClientPool.release(client);
      }
    }
  
    @Override
    public long migrate(AlluxioURI uri, long blockId, String workerHost, String mediumType)
        throws AlluxioException, IOException {
      JobMasterClient client = mJobMasterClientPool.acquire();
      try {
        return client.run(new MoveConfig(uri.getPath(), blockId, workerHost, mediumType));
      } finally {
        mJobMasterClientPool.release(client);
      }
    }
  }
  