| // |
| // ======================================================================== |
| // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| |
| package org.eclipse.jetty.util.preventers; |
| |
| import org.eclipse.jetty.util.component.AbstractLifeCycle; |
| import org.eclipse.jetty.util.log.Log; |
| import org.eclipse.jetty.util.log.Logger; |
| |
| /** |
| * AbstractLeakPreventer |
| * |
| * Abstract base class for code that seeks to avoid pinning of webapp classloaders by using the jetty classloader to |
| * proactively call the code that pins them (generally pinned as static data members, or as static |
| * data members that are daemon threads (which use the context classloader)). |
| * |
| * Instances of subclasses of this class should be set with Server.addBean(), which will |
| * ensure that they are called when the Server instance starts up, which will have the jetty |
| * classloader in scope. |
| * |
| */ |
| public abstract class AbstractLeakPreventer extends AbstractLifeCycle |
| { |
| protected static final Logger LOG = Log.getLogger(AbstractLeakPreventer.class); |
| |
| /* ------------------------------------------------------------ */ |
| abstract public void prevent(ClassLoader loader); |
| |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| protected void doStart() throws Exception |
| { |
| ClassLoader loader = Thread.currentThread().getContextClassLoader(); |
| try |
| { |
| Thread.currentThread().setContextClassLoader(getClass().getClassLoader()); |
| prevent(getClass().getClassLoader()); |
| super.doStart(); |
| } |
| finally |
| { |
| Thread.currentThread().setContextClassLoader(loader); |
| } |
| } |
| } |