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.fs.command;
  
  import alluxio.AlluxioURI;
  import alluxio.annotation.PublicApi;
  import alluxio.client.file.FileSystemContext;
  import alluxio.exception.AlluxioException;
  import alluxio.exception.status.InvalidArgumentException;
  import alluxio.grpc.MountPOptions;
  
  import com.google.common.collect.Maps;
  import org.apache.commons.cli.CommandLine;
  import org.apache.commons.cli.Option;
  import org.apache.commons.cli.Options;
  
  import java.io.IOException;
  import java.util.Properties;
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * Update options for an Alluxio mount point.
   */
  @ThreadSafe
  @PublicApi
  public final class UpdateMountCommand extends AbstractFileSystemCommand {
  
    private static final Option READONLY_OPTION =
        Option.builder()
            .longOpt("readonly")
            .required(false)
            .hasArg(false)
            .desc("mount point is readonly in Alluxio")
            .build();
    private static final Option SHARED_OPTION =
        Option.builder()
            .longOpt("shared")
            .required(false)
            .hasArg(false)
            .desc("mount point is shared")
            .build();
    private static final Option OPTION_OPTION =
        Option.builder()
            .longOpt("option")
            .required(false)
            .hasArg(true)
            .numberOfArgs(2)
            .argName("key=value")
            .valueSeparator('=')
            .desc("options for this mount point. For security reasons, no options from existing mount"
                + " point will be inherited.")
            .build();
  
    /**
     * @param fsContext the filesystem of Alluxio
     */
    public UpdateMountCommand(FileSystemContext fsContext) {
      super(fsContext);
    }
  
    @Override
    public String getCommandName() {
      return "updateMount";
    }
  
    @Override
    public Options getOptions() {
      return new Options().addOption(READONLY_OPTION).addOption(SHARED_OPTION)
          .addOption(OPTION_OPTION);
    }
  
    @Override
    public int run(CommandLine cl) throws AlluxioException, IOException {
      String[] args = cl.getArgs();
      AlluxioURI alluxioPath = new AlluxioURI(args[0]);
      MountPOptions.Builder optionsBuilder = MountPOptions.newBuilder();
  
      if (cl.hasOption(READONLY_OPTION.getLongOpt())) {
        optionsBuilder.setReadOnly(true);
      }
      if (cl.hasOption(SHARED_OPTION.getLongOpt())) {
        optionsBuilder.setShared(true);
      }
      if (cl.hasOption(OPTION_OPTION.getLongOpt())) {
        Properties properties = cl.getOptionProperties(OPTION_OPTION.getLongOpt());
        optionsBuilder.putAllProperties(Maps.fromProperties(properties));
      }
      mFileSystem.updateMount(alluxioPath, optionsBuilder.build());
      System.out.println("Updated mount point options at " + alluxioPath);
      return 0;
    }
  
    @Override
    public String getUsage() {
      return "updateMount [--readonly] [--shared] [--option <key=val>] <alluxioPath>";
    }
  
    @Override
    public String getDescription() {
      return "Updates options for a mount point while keeping the Alluxio metadata under the path.";
    }
  
    @Override
    public void validateArgs(CommandLine cl) throws InvalidArgumentException {
      if (cl.getArgs().length != 1) {
        throw new InvalidArgumentException("Command updateMount takes 1 argument, not " + cl
            .getArgs().length);
      }
    }
  }
  