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 io.jafka.console;
  
  import static java.lang.String.format;
  
  import java.io.IOException;
  import java.util.Arrays;
  
  import io.jafka.admin.AdminOperation;
  import joptsimple.ArgumentAcceptingOptionSpec;
  import joptsimple.OptionParser;
  import joptsimple.OptionSet;
  import joptsimple.OptionSpec;
  
  /**
   * @author adyliu (imxylz@gmail.com)
   * @since 1.2
   */
  public class AdminConsole {
  
      public static void main(String[] args) throws Exception {
  
          OptionParser parser = new OptionParser();
          ArgumentAcceptingOptionSpec<String> hostOpt = parser.acceptsAll(Arrays.asList("h", "host"), "server address")//
                  .withRequiredArg().describedAs("host").ofType(String.class);
          ArgumentAcceptingOptionSpec<Integer> portOpt = parser.acceptsAll(Arrays.asList("p", "port"), "server port")//
                  .withRequiredArg().describedAs("port").ofType(int.class);
          ArgumentAcceptingOptionSpec<String> topicOpt = parser.acceptsAll(Arrays.asList("t", "topic"), "topic name")//
                  .withRequiredArg().describedAs("topic").ofType(String.class);
          //
          parser.acceptsAll(Arrays.asList("c", "create"), "create topic");
          parser.acceptsAll(Arrays.asList("d", "delete"), "delete topic");
          //
          ArgumentAcceptingOptionSpec<Integer> partitionOpt = parser
                  .acceptsAll(Arrays.asList("P", "partition"), "topic partition")//
                  .withOptionalArg().describedAs("partition").ofType(int.class).defaultsTo(1);
          parser.acceptsAll(Arrays.asList("e", "enlarge"), "enlarge partition number if exists");
          //
          ArgumentAcceptingOptionSpec<String> passwordOpt = parser
                  .acceptsAll(Arrays.asList("password"), "jafka password")//
                  .withOptionalArg().describedAs("password").ofType(String.class);
          //
          OptionSet options = parser.parse(args);
          boolean create = options.has("c") || options.has("create");
          boolean delete = options.has("d") || options.has("delete");
          if (create && delete || !(create || delete)) {
              printHelp(parser, null);
          }
          checkRequiredArgs(parser, options, hostOpt, portOpt, topicOpt);
  
          String topic = options.valueOf(topicOpt);
          String host = options.valueOf(hostOpt);
          int port = options.valueOf(portOpt);
  
          AdminOperation admin = new AdminOperation(host, port);
          try {
              if (create) {
                  int partitionNum = options.valueOf(partitionOpt);
                  boolean enlarge = options.has("e") || options.has("enlarge");
                  int result = admin.createPartitions(topic, partitionNum, enlarge);
                  System.out.println(format("create %d partitions for topic [%s]", result, topic));
              } else {
                  final String password = options.valueOf(passwordOpt);
                  int result = admin.deleteTopic(topic, password);
                  System.out.println(format("delete %d partitions for topic [%s]", result, topic));
              }
          } finally {
              admin.close();
          }
      }
  
      static void checkRequiredArgs(OptionParser parser, OptionSet options, OptionSpec<?>... optionSepcs)
              throws IOException {
          for (OptionSpec<?> arg : optionSepcs) {
              if (!options.has(arg)) {
                  printHelp(parser, arg);
              }
          }
      }
  
      private static void printHelp(OptionParser parser, OptionSpec<?> arg) throws IOException {
          System.err.println("Create/Delete Topic");
          System.err.println("Usage: -c -h <host> -p <port> -t <topic> -P <partition> [-e]");
          System.err.println("       -d -h <host> -p <port> -t <topic> --password <password>");
          if (arg != null) {
              System.err.println("Missing required argument " + arg);
          }
          // parser.formatHelpWith(new MyFormatter());
          parser.printHelpOn(System.err);
          System.exit(1);
      }
  }
  