content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.bookkeeper.tools.cli.commands.bookies;
  
  import static org.apache.bookkeeper.meta.MetadataDrivers.runFunctionWithRegistrationManager;
  
  import com.google.common.util.concurrent.UncheckedExecutionException;
  import org.apache.bookkeeper.bookie.BookieException;
  import org.apache.bookkeeper.conf.ServerConfiguration;
  import org.apache.bookkeeper.tools.cli.helpers.BookieCommand;
  import org.apache.bookkeeper.tools.framework.CliFlags;
  import org.apache.bookkeeper.tools.framework.CliSpec;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Command to print instance id of the cluster.
   */
  public class InstanceIdCommand extends BookieCommand<CliFlags> {
  
      static final Logger LOG = LoggerFactory.getLogger(InstanceIdCommand.class);
  
      private static final String NAME = "instanceid";
      private static final String DESC = "Print the instanceid of the cluster";
  
      public InstanceIdCommand() {
          super(CliSpec.newBuilder().withName(NAME).withDescription(DESC).withFlags(new CliFlags()).build());
      }
  
      @Override
      public boolean apply(ServerConfiguration conf, CliFlags cmdFlags) {
          try {
              runFunctionWithRegistrationManager(conf, rm -> {
                  String readInstanceId = null;
                  try {
                      readInstanceId = rm.getClusterInstanceId();
                  } catch (BookieException e) {
                      throw new UncheckedExecutionException(e);
                  }
                  LOG.info("Metadata Service Uri: {} InstanceId: {}",
                           conf.getMetadataServiceUriUnchecked(), readInstanceId);
                  return null;
              });
          } catch (Exception e) {
              throw new UncheckedExecutionException(e.getMessage(), e);
          }
          return true;
      }
  }
  