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.journal;
  
  import alluxio.cli.fsadmin.command.AbstractFsAdminCommand;
  import alluxio.cli.fsadmin.command.Context;
  import alluxio.client.journal.JournalMasterClient;
  import alluxio.conf.AlluxioConfiguration;
  import alluxio.exception.ExceptionMessage;
  import alluxio.exception.status.InvalidArgumentException;
  import alluxio.grpc.JournalDomain;
  
  import com.google.common.annotations.VisibleForTesting;
  import org.apache.commons.cli.CommandLine;
  import org.apache.commons.cli.Options;
  
  import java.io.IOException;
  import java.util.Arrays;
  
  /**
   * Command for removing a server from journal quorum.
   */
  public class QuorumRemoveCommand extends AbstractFsAdminCommand {
  
    public static final String ADDRESS_OPTION_NAME = "address";
    public static final String DOMAIN_OPTION_NAME = "domain";
  
    public static final String OUTPUT_RESULT = "Removed server at: %s from quorum: %s";
  
    /**
     * @param context fsadmin command context
     * @param alluxioConf Alluxio configuration
     */
    public QuorumRemoveCommand(Context context, AlluxioConfiguration alluxioConf) {
      super(context);
    }
  
    /**
     * @return command's description
     */
    @VisibleForTesting
    public static String description() {
      return "Removes a server from embedded journal quorum.";
    }
  
    @Override
    public int run(CommandLine cl) throws IOException {
      JournalMasterClient jmClient = mMasterJournalMasterClient;
      String domainVal = cl.getOptionValue(DOMAIN_OPTION_NAME);
      try {
        JournalDomain domain = JournalDomain.valueOf(domainVal);
        if (domain == JournalDomain.JOB_MASTER) {
          jmClient = mJobMasterJournalMasterClient;
        }
      } catch (IllegalArgumentException e) {
        throw new InvalidArgumentException(ExceptionMessage.INVALID_OPTION_VALUE
                .getMessage(DOMAIN_OPTION_NAME, Arrays.toString(JournalDomain.values())));
      }
  
      String serverAddress = cl.getOptionValue(ADDRESS_OPTION_NAME);
      jmClient.removeQuorumServer(QuorumCommand.stringToAddress(serverAddress));
      mPrintStream.println(String.format(OUTPUT_RESULT, serverAddress, domainVal));
  
      return 0;
    }
  
    @Override
    public String getCommandName() {
      return "remove";
    }
  
    @Override
    public String getUsage() {
      return String.format("%s -%s <MASTER|JOB_MASTER>%n -%s <HostName:Port>", getCommandName(),
          DOMAIN_OPTION_NAME, ADDRESS_OPTION_NAME);
    }
  
    @Override
    public String getDescription() {
      return description();
    }
  
    @Override
    public void validateArgs(CommandLine cl) throws InvalidArgumentException {
      if (cl.getOptions().length != 2) {
        throw new InvalidArgumentException(
            ExceptionMessage.INVALID_OPTION_COUNT.getMessage(2, cl.getOptions().length));
      }
      // Validate passed options are correct.
      if (!cl.hasOption(DOMAIN_OPTION_NAME) || !cl.hasOption(ADDRESS_OPTION_NAME)) {
        throw new InvalidArgumentException(ExceptionMessage.INVALID_OPTION
            .getMessage(String.format("[%s, %s]", DOMAIN_OPTION_NAME, ADDRESS_OPTION_NAME)));
      }
    }
  
    @Override
    public Options getOptions() {
      return new Options().addOption(DOMAIN_OPTION_NAME, true, "Journal domain")
          .addOption(ADDRESS_OPTION_NAME, true, "Server address to remove");
    }
  }
  