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 java.io.IOException;
  import java.net.URI;
  
  import io.jafka.consumer.SimpleConsumer;
  
  import joptsimple.ArgumentAcceptingOptionSpec;
  import joptsimple.OptionParser;
  import joptsimple.OptionSet;
  import joptsimple.OptionSpec;
  
  /**
   * @author adyliu (imxylz@gmail.com)
   * @since 1.0
   */
  public class GetOffsetShell {
  
  
      public static void main(String[] args) throws Exception {
  
          OptionParser parser = new OptionParser();
          ArgumentAcceptingOptionSpec<String> urlOpt = parser.accepts("server", "REQUIRED: the jafka request uri")//
                  .withRequiredArg().describedAs("jafka://ip:port").ofType(String.class);
          ArgumentAcceptingOptionSpec<String> topicOpt = parser
                  .accepts("topic", "REQUIRED: The topic to get offset from.")//
                  .withRequiredArg().describedAs("topic").ofType(String.class);
          ArgumentAcceptingOptionSpec<Integer> partitionOpt = parser.accepts("partition", "partition id")//
                  .withRequiredArg().describedAs("partition_id").ofType(Integer.class).defaultsTo(0);
          ArgumentAcceptingOptionSpec<Long> timeOpt = parser
                  .accepts("time",
                          "unix time(ms) of the offsets.         -1: lastest; -2: earliest; unix million seconds: offset before this time")//
                  .withRequiredArg().describedAs("unix_time").ofType(Long.class).defaultsTo(-1L);
          ArgumentAcceptingOptionSpec<Integer> noffsetsOpt = parser.accepts("offsets", "number of offsets returned")//
                  .withRequiredArg().describedAs("count").ofType(Integer.class).defaultsTo(1);
          OptionSet options = parser.parse(args);
          checkRequiredArgs(parser, options, urlOpt, topicOpt, timeOpt);
  
          URI uri = new URI(options.valueOf(urlOpt));
          String topic = options.valueOf(topicOpt);
          int partition = options.valueOf(partitionOpt).intValue();
          long time = options.valueOf(timeOpt).longValue();
          int noffsets = options.valueOf(noffsetsOpt).intValue();
          SimpleConsumer consumer = new SimpleConsumer(uri.getHost(), uri.getPort(), 10000, 100 * 1000);
          try {
              long[] offsets = consumer.getOffsetsBefore(topic, partition, time, noffsets);
              System.out.println("get " + offsets.length + " result");
              for (long offset : offsets) {
                  System.out.println(offset);
              }
          } finally {
              consumer.close();
          }
      }
  
      static void checkRequiredArgs(OptionParser parser, OptionSet options, OptionSpec<?>... optionSepcs)
              throws IOException {
          for (OptionSpec<?> arg : optionSepcs) {
              if (!options.has(arg)) {
                  System.err.println("Missing required argument " + arg);
                  // parser.formatHelpWith(new MyFormatter());
                  parser.printHelpOn(System.err);
                  System.exit(1);
              }
          }
      }
  }
  