--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/eclipse/jetty/util/preventers/AbstractLeakPreventer.java	Wed Sep 07 21:15:48 2016 -0600
@@ -0,0 +1,62 @@
+//
+//  ========================================================================
+//  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);
+        }
+    }
+}