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 //
 //  ========================================================================
 //  Copyright (c) 1995-2012 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;
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);
        }
    }
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