diff -r 88b85470e72c -r f50545b5e2f1 src/share/jaxws_classes/com/sun/xml/internal/ws/util/Pool.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/jaxws_classes/com/sun/xml/internal/ws/util/Pool.java	Tue Mar 06 16:09:35 2012 -0800
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.xml.internal.ws.util;
+
+import com.sun.xml.internal.ws.api.pipe.Tube;
+import com.sun.xml.internal.ws.api.pipe.TubeCloner;
+
+import javax.xml.bind.JAXBContext;
+import javax.xml.bind.JAXBException;
+import java.util.concurrent.ConcurrentLinkedQueue;
+import java.lang.ref.WeakReference;
+
+/**
+ * General-purpose object pool.
+ *
+ * <p>
+ * In many parts of the runtime, we need to pool instances of objects that
+ * are expensive to create (such as JAXB objects, StAX parsers, {@link Tube} instances.)
+ *
+ * <p>
+ * This class provides a default implementation of such a pool.
+ *
+ * TODO: improve the implementation
+ *
+ * @author Kohsuke Kawaguchi
+ */
+public abstract class Pool<T> {
+
+    // volatile since multiple threads may access queue reference
+    private volatile WeakReference<ConcurrentLinkedQueue<T>> queue;
+
+    /**
+     * Gets a new object from the pool.
+     *
+     * <p>
+     * If no object is available in the pool, this method creates a new one.
+     *
+     * @return
+     *      always non-null.
+     */
+    public final T take() {
+        T t = getQueue().poll();
+        if(t==null)
+            return create();
+        return t;
+    }
+
+    private ConcurrentLinkedQueue<T> getQueue() {
+        WeakReference<ConcurrentLinkedQueue<T>> q = queue;
+        if (q != null) {
+            ConcurrentLinkedQueue<T> d = q.get();
+            if (d != null)
+                return d;
+        }
+
+        // overwrite the queue
+        ConcurrentLinkedQueue<T> d = new ConcurrentLinkedQueue<T>();
+        queue = new WeakReference<ConcurrentLinkedQueue<T>>(d);
+
+        return d;
+    }
+
+    /**
+     * Returns an object back to the pool.
+     */
+    public final void recycle(T t) {
+        getQueue().offer(t);
+    }
+
+    /**
+     * Creates a new instance of object.
+     *
+     * <p>
+     * This method is used when someone wants to
+     * {@link #take() take} an object from an empty pool.
+     *
+     * <p>
+     * Also note that multiple threads may call this method
+     * concurrently.
+     */
+    protected abstract T create();
+
+
+    /**
+     * JAXB {@link javax.xml.bind.Marshaller} pool.
+     */
+    public static final class Marshaller extends Pool<javax.xml.bind.Marshaller> {
+        private final JAXBContext context;
+
+        public Marshaller(JAXBContext context) {
+            this.context = context;
+        }
+
+        protected javax.xml.bind.Marshaller create() {
+            try {
+                return context.createMarshaller();
+            } catch (JAXBException e) {
+                // impossible
+                throw new AssertionError(e);
+            }
+        }
+    }
+
+    /**
+     * JAXB {@link javax.xml.bind.Marshaller} pool.
+     */
+    public static final class Unmarshaller extends Pool<javax.xml.bind.Unmarshaller> {
+        private final JAXBContext context;
+
+        public Unmarshaller(JAXBContext context) {
+            this.context = context;
+        }
+
+        protected javax.xml.bind.Unmarshaller create() {
+            try {
+                return context.createUnmarshaller();
+            } catch (JAXBException e) {
+                // impossible
+                throw new AssertionError(e);
+            }
+        }
+    }
+
+    /**
+     * {@link Tube} pool.
+     */
+    public static final class TubePool extends Pool<Tube> {
+        private final Tube master;
+
+        public TubePool(Tube master) {
+            this.master = master;
+            recycle(master);    // we'll use master as a part of the pool, too.
+        }
+
+        protected Tube create() {
+            return TubeCloner.clone(master);
+        }
+    }
+}