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1   //
2   //  ========================================================================
3   //  Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
4   //  ------------------------------------------------------------------------
5   //  All rights reserved. This program and the accompanying materials
6   //  are made available under the terms of the Eclipse Public License v1.0
7   //  and Apache License v2.0 which accompanies this distribution.
8   //
9   //      The Eclipse Public License is available at
10  //      http://www.eclipse.org/legal/epl-v10.html
11  //
12  //      The Apache License v2.0 is available at
13  //      http://www.opensource.org/licenses/apache2.0.php
14  //
15  //  You may elect to redistribute this code under either of these licenses.
16  //  ========================================================================
17  //
18  
19  package org.eclipse.jetty.util.preventers;
20  
21  import javax.imageio.ImageIO;
22  
23  /**
24   * AppContextLeakPreventer
25   *
26   * Cause the classloader that is pinned by AppContext.getAppContext() to be 
27   * a container or system classloader, not a webapp classloader.
28   * 
29   * Inspired by Tomcat JreMemoryLeakPrevention.
30   */
31  public class AppContextLeakPreventer extends AbstractLeakPreventer
32  {
33      /* ------------------------------------------------------------ */
34      @Override
35      public void prevent(ClassLoader loader)
36      {
37          if (LOG.isDebugEnabled())
38              LOG.debug("Pinning classloader for AppContext.getContext() with "+loader);
39          ImageIO.getUseCache();
40      }
41  
42  }