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.command;
  
  import alluxio.annotation.PublicApi;
  import alluxio.cli.CommandUtils;
  import alluxio.cli.fsadmin.FileSystemAdminShellUtils;
  import alluxio.conf.AlluxioConfiguration;
  import alluxio.exception.status.InvalidArgumentException;
  import alluxio.master.block.BlockId;
  import alluxio.wire.BlockInfo;
  
  import org.apache.commons.cli.CommandLine;
  import org.apache.commons.cli.Option;
  import org.apache.commons.cli.Options;
  
  import java.io.IOException;
  
  /**
   * Command for getting information from a block id.
   */
  @PublicApi
  public class GetBlockInfoCommand extends AbstractFsAdminCommand {
    private static final String HELP_OPTION_NAME = "h";
    private static final Option HELP_OPTION =
        Option.builder(HELP_OPTION_NAME)
            .required(false)
            .hasArg(false)
            .desc("print help information.")
            .build();
  
    private final AlluxioConfiguration mConf;
  
    /**
     * @param context fsadmin command context
     * @param alluxioConf Alluxio configuration
     */
    public GetBlockInfoCommand(Context context, AlluxioConfiguration alluxioConf) {
      super(context);
      mConf = alluxioConf;
    }
  
    @Override
    public String getCommandName() {
      return "getBlockInfo";
    }
  
    @Override
    public int run(CommandLine cl) throws IOException {
      if (cl.hasOption(HELP_OPTION_NAME)) {
        System.out.println(getUsage());
        System.out.println(getDescription());
        return 0;
      }
  
      FileSystemAdminShellUtils.checkMasterClientService(mConf);
  
      long blockId;
      String arg = cl.getArgs()[0];
      try {
        blockId = Long.parseLong(arg);
      } catch (NumberFormatException e) {
        throw new InvalidArgumentException(arg + " is not a valid block id.");
      }
  
      BlockInfo info = null;
      try {
        info = mBlockClient.getBlockInfo(blockId);
      } catch (Exception e) {
        // ignore
      }
      long fileId = BlockId.getFileId(blockId);
      String path = null;
      try {
        path = mFsClient.getFilePath(fileId);
      } catch (Exception e) {
        // ignore
      }
      if (info != null) {
        System.out.println(info);
      } else {
        System.out.println("BlockMeta is not available for blockId: " + blockId);
      }
      if (path != null) {
        System.out.printf("This block belongs to file {id=%s, path=%s}%n", fileId, path);
      } else {
        System.out.printf("This block belongs to file {id=%s}%n", fileId);
      }
      return 0;
    }
  
    @Override
    public String getUsage() {
      return "getBlockInfo [blockId]";
    }
  
    @Override
    public String getDescription() {
      return "get the block information and file path of a specified block id.";
    }
  
    @Override
    public Options getOptions() {
      return new Options()
          .addOption(HELP_OPTION);
    }
  
    @Override
    public void validateArgs(CommandLine cl) throws InvalidArgumentException {
      CommandUtils.checkNumOfArgsEquals(this, cl, 1);
    }
  }
  