/**
    * Copyright (C) 2010-2012 Joerg Bellmann <joerg.bellmann@googlemail.com>
    *
    * Licensed 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.googlecode.t7mp;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.catalina.startup.Bootstrap;
  
  import com.googlecode.t7mp.scanner.Scanner;
  import com.googlecode.t7mp.util.CatalinaOutPrintStream;
  
  /**
   * TODO Comment.
   * 
   * @author Joerg Bellmann
   * 
   */
  public final class TomcatShutdownHook extends Thread implements ShutdownHook {
  
      private static final int SLEEPTIME = 1500;
      private Bootstrap bootstrap;
      private final List<Scanner> scanners = new ArrayList<Scanner>();
      private final CatalinaOutPrintStream catalinaOutPrintStream;
      private final PluginLog log;
  
      public TomcatShutdownHook(Bootstrap bootstrap, CatalinaOutPrintStream catalinaOutPrintStream, PluginLog log) {
          this.bootstrap = bootstrap;
          this.catalinaOutPrintStream = catalinaOutPrintStream;
          this.log = log;
      }
  
      @Override
      public void addScanner(Scanner scanner) {
          this.scanners.add(scanner);
      }
  
      @Override
      public void run() {
          log.info("Stopping Tomcat ...");
          stopScanners();
          if (bootstrap != null) {
              try {
                  bootstrap.stop();
                  bootstrap = null;
                  log.info("Tomcat stopped");
                  Thread.sleep(SLEEPTIME);
              } catch (Exception e) {
                  log.error(e.getMessage(), e);
              }
          }
          if (catalinaOutPrintStream != null) {
              catalinaOutPrintStream.flush();
              catalinaOutPrintStream.close();
              System.setErr(catalinaOutPrintStream.getOriginalSystemErr());
          }
      }
  
      @Override
      public void stopScanners() {
          for (Scanner scanner : scanners) {
              scanner.stop();
          }
      }
  }