content: /**
   * Copyright The Apache Software Foundation
   *
   * 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 com.alibaba.wasp.util;
  
  import com.alibaba.wasp.conf.WaspConfiguration;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.hadoop.conf.Configured;
  import org.apache.hadoop.util.Tool;
  import org.apache.hadoop.util.ToolRunner;
  
  import java.lang.management.ManagementFactory;
  import java.lang.management.RuntimeMXBean;
  
  public abstract class ServerCommandLine extends Configured implements Tool {
    private static final Log LOG = LogFactory.getLog(ServerCommandLine.class);
  
    /**
     * Implementing subclasses should return a usage string to print out.
     */
    protected abstract String getUsage();
  
    /**
     * Print usage information for this command line.
     *
     * @param message if not null, print this message before the usage info.
     */
    protected void usage(String message) {
      if (message != null) {
        System.err.println(message);
        System.err.println("");
      }
  
      System.err.println(getUsage());
    }
  
    /**
     * Log information about the currently running JVM.
     */
    public static void logJVMInfo() {
      // Print out vm stats before starting up.
      RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
      if (runtime != null) {
        LOG.info("vmName=" + runtime.getVmName() + ", vmVendor=" +
                 runtime.getVmVendor() + ", vmVersion=" + runtime.getVmVersion());
        LOG.info("vmInputArguments=" + runtime.getInputArguments());
      }
    }
  
    /**
     * Parse and run the given command line. This may exit the JVM if
     * a nonzero exit code is returned from <code>run()</code>.
     */
    public void doMain(String args[]) {
      try {
        int ret = ToolRunner.run(WaspConfiguration.create(), this, args);
        if (ret != 0) {
          System.exit(ret);
        }
      } catch (Exception e) {
        LOG.error("Failed to run", e);
        System.exit(-1);
      }
    }
  }
  