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 backtype.storm;
  
  /**
   * A tool abstract class that supports handling of generic command-line options.
   *
   * <p>
   * Here is how a typical <code>Tool</code> is implemented:
   * </p>
   * <p>
   * <blockquote>
   *
   * <pre>
   *     public class TopologyApp extends Tool {
   *         {@literal @}Override
   *         public int run(String[] args) throws Exception {
   *             // Config processed by ToolRunner
   *             Config conf = getConf();
   *
   *             // Other setups go here
   *             String name = "topology";
   *             StormTopology topology = buildTopology(args);
   *             StormSubmitter.submitTopology(name, conf, topology);
   *             return 0;
   *         }
   *
   *         StormTopology buildTopology(String[] args) { ... }
   *
   *         public static void main(String[] args) throws Exception {
   *             // Use ToolRunner to handle generic command-line options
   *             ToolRunner.run(new TopologyApp(), args);
   *         }
   *     }
   * </pre>
   *
   * </blockquote>
   * </p>
   *
   * @see GenericOptionsParser
   * @see ToolRunner
   */
  
  public abstract class Tool {
      Config config;
  
      public abstract int run(String[] args) throws Exception;
  
      public Config getConf() {
          return config;
      }
  
      public void setConf(Config config) {
          this.config = config;
      }
  }
  