1   /**
2    * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3    *
4    * This library is free software; you can redistribute it and/or modify it under
5    * the terms of the GNU Lesser General Public License as published by the Free
6    * Software Foundation; either version 2.1 of the License, or (at your option)
7    * any later version.
8    *
9    * This library is distributed in the hope that it will be useful, but WITHOUT
10   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11   * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12   * details.
13   */
14  
15  package com.liferay.portal.events;
16  
17  import com.liferay.portal.kernel.events.SessionAction;
18  import com.liferay.portal.kernel.log.Log;
19  import com.liferay.portal.kernel.log.LogFactoryUtil;
20  
21  import java.text.NumberFormat;
22  
23  import javax.servlet.http.HttpSession;
24  
25  /**
26   * <a href="GarbageCollectorAction.java.html"><b><i>View Source</i></b></a>
27   *
28   * @author Brian Wing Shun Chan
29   */
30  public class GarbageCollectorAction extends SessionAction {
31  
32      public void run(HttpSession session) {
33          Runtime runtime = Runtime.getRuntime();
34  
35          NumberFormat nf = NumberFormat.getInstance();
36  
37          if (_log.isDebugEnabled()) {
38              _log.debug(
39                  "Before:\t\t" +
40                      nf.format(runtime.freeMemory()) + "\t" +
41                          nf.format(runtime.totalMemory()) + "\t" +
42                              nf.format(runtime.maxMemory()));
43          }
44  
45          System.gc();
46  
47          if (_log.isDebugEnabled()) {
48              _log.debug(
49                  "After:\t\t" +
50                      nf.format(runtime.freeMemory()) + "\t" +
51                          nf.format(runtime.totalMemory()) + "\t" +
52                              nf.format(runtime.maxMemory()));
53          }
54      }
55  
56      private static Log _log = LogFactoryUtil.getLog(
57          GarbageCollectorAction.class);
58  
59  }