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.ClientContext;
  import alluxio.Sessions;
  import alluxio.conf.Configuration;
  import alluxio.conf.PropertyKey;
  import alluxio.master.MasterClientContext;
  import alluxio.underfs.UfsManager;
  import alluxio.worker.WorkerFactory;
  import alluxio.worker.WorkerRegistry;
  import alluxio.worker.file.FileSystemMasterClient;
  import alluxio.worker.page.PagedBlockStore;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.concurrent.atomic.AtomicReference;
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * Factory to create a {@link BlockWorker} instance.
   */
  @ThreadSafe
  public final class BlockWorkerFactory implements WorkerFactory {
    private static final Logger LOG = LoggerFactory.getLogger(BlockWorkerFactory.class);
    private final boolean mWorkerRegisterToAllMasters = Configuration.getBoolean(
        PropertyKey.WORKER_REGISTER_TO_ALL_MASTERS);
  
    /**
     * Constructs a new {@link BlockWorkerFactory}.
     */
    public BlockWorkerFactory() {}
  
    @Override
    public boolean isEnabled() {
      return true;
    }
  
    @Override
    public BlockWorker create(WorkerRegistry registry, UfsManager ufsManager) {
      BlockMasterClientPool blockMasterClientPool = new BlockMasterClientPool();
      AtomicReference<Long> workerId = new AtomicReference<>(-1L);
      BlockStore blockStore;
      switch (Configuration.global()
          .getEnum(PropertyKey.WORKER_BLOCK_STORE_TYPE, BlockStoreType.class)) {
        case PAGE:
          LOG.info("Creating PagedBlockWorker");
          blockStore = PagedBlockStore.create(ufsManager, blockMasterClientPool, workerId);
          break;
        case FILE:
          LOG.info("Creating DefaultBlockWorker");
          blockStore =
              new MonoBlockStore(new TieredBlockStore(), blockMasterClientPool, ufsManager, workerId);
          break;
        default:
          throw new UnsupportedOperationException("Unsupported block store type.");
      }
      BlockWorker blockWorker = mWorkerRegisterToAllMasters
          ? new AllMasterRegistrationBlockWorker(blockMasterClientPool,
              new FileSystemMasterClient(
                  MasterClientContext.newBuilder(ClientContext.create(Configuration.global()))
                      .build()),
              new Sessions(), blockStore, workerId)
          : new DefaultBlockWorker(blockMasterClientPool,
              new FileSystemMasterClient(
                  MasterClientContext.newBuilder(ClientContext.create(Configuration.global()))
                      .build()),
              new Sessions(), blockStore, workerId);
      registry.add(BlockWorker.class, blockWorker);
      return blockWorker;
    }
  }
  