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;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.commons.cli.ParseException;
  
  
  /**
   * A utility class to help run {@link Tool}s
   *
   * <p>
   * <code>ToolRunner</code> can be used to run classes extending the <code>Tool</code> abstract class. It works in conjunction with {@link GenericOptionsParser} to parse the <a
   * href="{@docRoot} to parse the <a href="{@docRoot} to parse the <a href="{@docRoot} to parse the <a
   * href="{@docRoot}
   * to parse the <a href="{@docRoot} to parse the <a href="{@docRoot} to parse the <a href="{@docRoot} to parse the <a href="{@docRoot}
   * to parse the <a href="{@docRoot} to parse the <a href="{@docRoot} to parse the <a href="{@docRoot} to parse the <a href="{@docRoot} to parse the <a
   * href="{@docRoot} to parse the <a href="{@docRoot} to parse the <a href="{@docRoot} to parse the <a href="{@docRoot}
   * /backtype/storm/GenericOptionsParser.html#GenericOptions"> generic storm command line arguments</a> and modifies the <code>Config</code> of the
   * <code>Tool</code>. The application-specific options are passed along without being modified.
   *
   * @see Tool
   * @see GenericOptionsParser
   */
  
  public class ToolRunner {
      static final Logger LOG = LoggerFactory.getLogger(ToolRunner.class);
  
      public static void run(Tool tool, String[] args) {
          run(tool.getConf(), tool, args);
      }
  
      public static void run(Config conf, Tool tool, String[] args) {
          try {
              if (conf == null) {
                  conf = new Config();
              }
  
              GenericOptionsParser parser = new GenericOptionsParser(conf, args);
              LOG.info(conf.toString());
              tool.setConf(conf);
  
              System.exit(tool.run(parser.getRemainingArgs()));
          } catch (ParseException e) {
              LOG.error("Error parsing generic options: {}", e.getMessage());
              GenericOptionsParser.printGenericCommandUsage(System.err);
              System.exit(2);
          } catch (Exception e) {
              LOG.error("Error running tool", e);
              System.exit(1);
          }
      }
  }
  