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annotate src/org/eclipse/jetty/util/preventers/AbstractLeakPreventer.java @ 802:3428c60d7cfc

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replace jetty jars with source
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 07 Sep 2016 21:15:48 -0600
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1 //
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2 // ========================================================================
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
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4 // ------------------------------------------------------------------------
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5 // All rights reserved. This program and the accompanying materials
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6 // are made available under the terms of the Eclipse Public License v1.0
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7 // and Apache License v2.0 which accompanies this distribution.
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8 //
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9 // The Eclipse Public License is available at
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10 // http://www.eclipse.org/legal/epl-v10.html
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11 //
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12 // The Apache License v2.0 is available at
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13 // http://www.opensource.org/licenses/apache2.0.php
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14 //
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15 // You may elect to redistribute this code under either of these licenses.
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16 // ========================================================================
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17 //
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18
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19
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20 package org.eclipse.jetty.util.preventers;
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21
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22 import org.eclipse.jetty.util.component.AbstractLifeCycle;
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23 import org.eclipse.jetty.util.log.Log;
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24 import org.eclipse.jetty.util.log.Logger;
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25
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26 /**
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27 * AbstractLeakPreventer
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28 *
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29 * Abstract base class for code that seeks to avoid pinning of webapp classloaders by using the jetty classloader to
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30 * proactively call the code that pins them (generally pinned as static data members, or as static
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31 * data members that are daemon threads (which use the context classloader)).
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32 *
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33 * Instances of subclasses of this class should be set with Server.addBean(), which will
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34 * ensure that they are called when the Server instance starts up, which will have the jetty
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35 * classloader in scope.
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36 *
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37 */
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38 public abstract class AbstractLeakPreventer extends AbstractLifeCycle
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39 {
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40 protected static final Logger LOG = Log.getLogger(AbstractLeakPreventer.class);
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41
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42 /* ------------------------------------------------------------ */
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43 abstract public void prevent(ClassLoader loader);
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44
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45
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46 /* ------------------------------------------------------------ */
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47 @Override
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48 protected void doStart() throws Exception
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49 {
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50 ClassLoader loader = Thread.currentThread().getContextClassLoader();
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51 try
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52 {
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53 Thread.currentThread().setContextClassLoader(getClass().getClassLoader());
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54 prevent(getClass().getClassLoader());
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55 super.doStart();
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56 }
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57 finally
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58 {
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59 Thread.currentThread().setContextClassLoader(loader);
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60 }
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61 }
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62 }