--- a/jdk/src/share/classes/com/sun/jmx/mbeanserver/PerThreadGroupPool.java	Wed Oct 21 15:47:09 2009 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,71 +0,0 @@
-/*
- * Copyright 1999-2008 Sun Microsystems, Inc.  All Rights Reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.  Sun designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Sun in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- */
-
-package com.sun.jmx.mbeanserver;
-
-import java.lang.ref.WeakReference;
-import java.util.concurrent.ThreadPoolExecutor;
-
-/**
- * <p>A factory for ThreadPoolExecutor objects that allows the same object to
- * be shared by all users of the factory that are in the same ThreadGroup.</p>
- */
-// We return a ThreadPoolExecutor rather than the more general ExecutorService
-// because we need to be able to call allowCoreThreadTimeout so that threads in
-// the pool will eventually be destroyed when the pool is no longer in use.
-// Otherwise these threads would keep the ThreadGroup alive forever.
-public class PerThreadGroupPool<T extends ThreadPoolExecutor> {
-    private final WeakIdentityHashMap<ThreadGroup, WeakReference<T>> map =
-            WeakIdentityHashMap.make();
-
-    public static interface Create<T extends ThreadPoolExecutor> {
-        public T createThreadPool(ThreadGroup group);
-    }
-
-    private PerThreadGroupPool() {}
-
-    public static <T extends ThreadPoolExecutor> PerThreadGroupPool<T> make() {
-        return new PerThreadGroupPool<T>();
-    }
-
-    public synchronized T getThreadPoolExecutor(Create<T> create) {
-        // Find out if there's already an existing executor for the calling
-        // thread and reuse it. Otherwise, create a new one and store it in
-        // the executors map. If there is a SecurityManager, the group of
-        // System.getSecurityManager() is used, else the group of the calling
-        // thread.
-        SecurityManager s = System.getSecurityManager();
-        ThreadGroup group = (s != null) ? s.getThreadGroup() :
-            Thread.currentThread().getThreadGroup();
-        WeakReference<T> wr = map.get(group);
-        T executor = (wr == null) ? null : wr.get();
-        if (executor == null) {
-            executor = create.createThreadPool(group);
-            executor.allowCoreThreadTimeOut(true);
-            map.put(group, new WeakReference<T>(executor));
-        }
-        return executor;
-    }
-}