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.table.command;
  
  import alluxio.AlluxioURI;
  import alluxio.cli.CommandUtils;
  import alluxio.client.file.FileSystemContext;
  import alluxio.client.table.TableMasterClient;
  import alluxio.conf.AlluxioConfiguration;
  import alluxio.conf.PropertyKey;
  import alluxio.exception.status.AlluxioStatusException;
  import alluxio.exception.status.InvalidArgumentException;
  import alluxio.util.io.PathUtils;
  
  import org.apache.commons.cli.CommandLine;
  
  /**
   * This command removes a database from the table master.
   *
   * After calling this, the database and all table metadata is removed. To regain access to this
   * table, the corresponding {@link AttachDatabaseCommand} will need to be called again.
   */
  public class DetachDatabaseCommand extends AbstractTableCommand {
    /**
     * Creates a new instance of {@link DetachDatabaseCommand}.
     *
     * @param conf alluxio configuration
     * @param client the table master client
     * @param fsContext the filesystem of Alluxio
     */
    public DetachDatabaseCommand(AlluxioConfiguration conf, TableMasterClient client,
        FileSystemContext fsContext) {
      super(conf, client, fsContext);
    }
  
    @Override
    public void validateArgs(CommandLine cli) throws InvalidArgumentException {
      CommandUtils.checkNumOfArgsEquals(this, cli, 1);
    }
  
    @Override
    public String getCommandName() {
      return "detachdb";
    }
  
    @Override
    public String getUsage() {
      return "detachdb <db name>";
    }
  
    @Override
    public String getDescription() {
      return "Detach a database with the given name from the Alluxio catalog master's namespace";
    }
  
    @Override
    public int run(CommandLine cli) throws AlluxioStatusException {
      String dbName = cli.getArgs()[0];
      if (mClient.detachDatabase(dbName)) {
        AlluxioURI path = new AlluxioURI(PathUtils
            .concatPath(mConf.get(PropertyKey.TABLE_CATALOG_PATH), dbName));
        System.out.println("Successfully detached db " + dbName
            + ". Please unmount and clean up the alluxio location at " + path
            + " before attaching another database named " + dbName);
      }
      return 0;
    }
  }
  