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.cli.fsadmin.doctor;
  
  import alluxio.client.block.BlockMasterClient;
  import alluxio.grpc.StorageList;
  import alluxio.grpc.WorkerLostStorageInfo;
  
  import java.io.IOException;
  import java.io.PrintStream;
  import java.util.List;
  import java.util.Map;
  
  /**
   * Prints server-side storage errors and warnings.
   */
  public class StorageCommand {
    private final BlockMasterClient mBlockMasterClient;
    private final PrintStream mPrintStream;
  
    /**
     * Creates a new instance of {@link StorageCommand}.
     *
     * @param blockMasterClient client to get server-side worker lost storage information
     * @param printStream stream to print storage warnings to
     */
    public StorageCommand(BlockMasterClient blockMasterClient, PrintStream printStream) {
      mBlockMasterClient = blockMasterClient;
      mPrintStream = printStream;
    }
  
    /**
     * Runs doctor storage command.
     *
     * @return 0 on success, 1 otherwise
     */
    public int run() throws IOException {
      List<WorkerLostStorageInfo> workerLostStorageList = mBlockMasterClient.getWorkerLostStorage();
      if (workerLostStorageList.size() == 0) {
        mPrintStream.println("All worker storage paths are in working state.");
        return 0;
      }
      for (WorkerLostStorageInfo info : workerLostStorageList) {
        Map<String, StorageList> lostStorageMap = info.getLostStorageMap();
        if (lostStorageMap.size() != 0) {
          mPrintStream.printf("The following storage paths are lost in worker %s: %n",
              info.getAddress().getHost());
          for (Map.Entry<String, StorageList> tierStorage : lostStorageMap.entrySet()) {
            for (String storage : tierStorage.getValue().getStorageList()) {
              mPrintStream.printf("%s (%s)%n", storage, tierStorage.getKey());
            }
          }
        }
      }
      return 0;
    }
  }
  