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.block;
  
  import alluxio.Sessions;
  import alluxio.wire.WorkerNetAddress;
  import alluxio.worker.file.FileSystemMasterClient;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.IOException;
  import java.net.InetSocketAddress;
  import java.util.concurrent.atomic.AtomicReference;
  import javax.annotation.concurrent.NotThreadSafe;
  
  /**
   * The class is responsible for managing all top level components of BlockWorker.
   *
   * This block worker implementation register workers to all masters.
   */
  @NotThreadSafe
  public class AllMasterRegistrationBlockWorker extends DefaultBlockWorker {
    private static final Logger LOG = LoggerFactory.getLogger(AllMasterRegistrationBlockWorker.class);
    private BlockSyncMasterGroup mBlockSyncMasterGroup;
  
    /**
     * Constructs a block worker when workers register to all masters.
     *
     * @param blockMasterClientPool a client pool for talking to the block master
     * @param fileSystemMasterClient a client for talking to the file system master
     * @param sessions an object for tracking and cleaning up client sessions
     * @param blockStore an Alluxio block store
     * @param workerId worker id
     */
    public AllMasterRegistrationBlockWorker(
        BlockMasterClientPool blockMasterClientPool,
        FileSystemMasterClient fileSystemMasterClient, Sessions sessions,
        BlockStore blockStore, AtomicReference<Long> workerId) {
      super(blockMasterClientPool, fileSystemMasterClient, sessions, blockStore, workerId);
    }
  
    @Override
    protected void setupBlockMasterSync() {
      mBlockSyncMasterGroup =
          BlockSyncMasterGroup.Factory.createAllMasterSync(this);
      mResourceCloser.register(mBlockSyncMasterGroup);
      mBlockSyncMasterGroup.start(getExecutorService());
    }
  
    @Override
    public void start(WorkerNetAddress address) throws IOException {
      super.start(address);
  
      InetSocketAddress primaryMasterAddress =
          (InetSocketAddress) mFileSystemMasterClient.getRemoteSockAddress();
      // Registrations on standby masters are not required to complete for starting a worker
      // because standby masters do not serve read requests.
      // Standby masters will catch up following block location changes via worker heartbeats.
      mBlockSyncMasterGroup.waitForPrimaryMasterRegistrationComplete(primaryMasterAddress);
    }
  
    /**
     * @return the block sync master group
     */
    public BlockSyncMasterGroup getBlockSyncMasterGroup() {
      return mBlockSyncMasterGroup;
    }
  }
  