--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/eclipse/jetty/util/thread/ExecutorThreadPool.java	Wed Sep 07 21:15:48 2016 -0600
@@ -0,0 +1,184 @@
+//
+//  ========================================================================
+//  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.thread;
+
+import java.util.concurrent.ArrayBlockingQueue;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.RejectedExecutionException;
+import java.util.concurrent.SynchronousQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+import org.eclipse.jetty.util.component.AbstractLifeCycle;
+import org.eclipse.jetty.util.component.LifeCycle;
+import org.eclipse.jetty.util.log.Log;
+import org.eclipse.jetty.util.log.Logger;
+
+/* ------------------------------------------------------------ */
+/**
+ * Jetty ThreadPool using java 5 ThreadPoolExecutor
+ * This class wraps a {@link ExecutorService} as a {@link ThreadPool} and
+ * {@link LifeCycle} interfaces so that it may be used by the Jetty <code>org.eclipse.jetty.server.Server</code>
+ */
+public class ExecutorThreadPool extends AbstractLifeCycle implements ThreadPool, LifeCycle
+{
+    private static final Logger LOG = Log.getLogger(ExecutorThreadPool.class);
+    private final ExecutorService _executor;
+
+    /* ------------------------------------------------------------ */
+    public ExecutorThreadPool(ExecutorService executor)
+    {
+        _executor = executor;
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Wraps an {@link ThreadPoolExecutor}.
+     * Max pool size is 256, pool thread timeout after 60 seconds and
+     * an unbounded {@link LinkedBlockingQueue} is used for the job queue;
+     */
+    public ExecutorThreadPool()
+    {
+        // Using an unbounded queue makes the maxThreads parameter useless
+        // Refer to ThreadPoolExecutor javadocs for details
+        this(new ThreadPoolExecutor(256, 256, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>()));
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Wraps an {@link ThreadPoolExecutor}.
+     * Max pool size is 256, pool thread timeout after 60 seconds, and core pool size is 32 when queueSize >= 0.
+     * @param queueSize can be -1 for using an unbounded {@link LinkedBlockingQueue}, 0 for using a
+     * {@link SynchronousQueue}, greater than 0 for using a {@link ArrayBlockingQueue} of the given size.
+     */
+    public ExecutorThreadPool(int queueSize)
+    {
+        this(queueSize < 0 ? new ThreadPoolExecutor(256, 256, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>()) :
+                queueSize == 0 ? new ThreadPoolExecutor(32, 256, 60, TimeUnit.SECONDS, new SynchronousQueue<Runnable>()) :
+                        new ThreadPoolExecutor(32, 256, 60, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(queueSize)));
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Wraps an {@link ThreadPoolExecutor} using
+     * an unbounded {@link LinkedBlockingQueue} is used for the jobs queue;
+     * @param corePoolSize must be equal to maximumPoolSize
+     * @param maximumPoolSize the maximum number of threads to allow in the pool
+     * @param keepAliveTime the max time a thread can remain idle, in milliseconds
+     */
+    public ExecutorThreadPool(int corePoolSize, int maximumPoolSize, long keepAliveTime)
+    {
+        this(corePoolSize, maximumPoolSize, keepAliveTime, TimeUnit.MILLISECONDS);
+    }
+
+    /* ------------------------------------------------------------ */
+    /**
+     * Wraps an {@link ThreadPoolExecutor} using
+     * an unbounded {@link LinkedBlockingQueue} is used for the jobs queue.
+     * @param corePoolSize must be equal to maximumPoolSize
+     * @param maximumPoolSize the maximum number of threads to allow in the pool
+     * @param keepAliveTime the max time a thread can remain idle
+     * @param unit the unit for the keepAliveTime
+     */
+    public ExecutorThreadPool(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit)
+    {
+        this(corePoolSize, maximumPoolSize, keepAliveTime, unit, new LinkedBlockingQueue<Runnable>());
+    }
+
+    /* ------------------------------------------------------------ */
+
+    /**
+     * Wraps an {@link ThreadPoolExecutor}
+     * @param corePoolSize the number of threads to keep in the pool, even if they are idle
+     * @param maximumPoolSize the maximum number of threads to allow in the pool
+     * @param keepAliveTime the max time a thread can remain idle
+     * @param unit the unit for the keepAliveTime
+     * @param workQueue the queue to use for holding tasks before they are executed
+     */
+    public ExecutorThreadPool(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue)
+    {
+        this(new ThreadPoolExecutor(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue));
+    }
+
+    /* ------------------------------------------------------------ */
+    public boolean dispatch(Runnable job)
+    {
+        try
+        {
+            _executor.execute(job);
+            return true;
+        }
+        catch(RejectedExecutionException e)
+        {
+            LOG.warn(e);
+            return false;
+        }
+    }
+
+    /* ------------------------------------------------------------ */
+    public int getIdleThreads()
+    {
+        if (_executor instanceof ThreadPoolExecutor)
+        {
+            final ThreadPoolExecutor tpe = (ThreadPoolExecutor)_executor;
+            return tpe.getPoolSize() - tpe.getActiveCount();
+        }
+        return -1;
+    }
+
+    /* ------------------------------------------------------------ */
+    public int getThreads()
+    {
+        if (_executor instanceof ThreadPoolExecutor)
+        {
+            final ThreadPoolExecutor tpe = (ThreadPoolExecutor)_executor;
+            return tpe.getPoolSize();
+        }
+        return -1;
+    }
+
+    /* ------------------------------------------------------------ */
+    public boolean isLowOnThreads()
+    {
+        if (_executor instanceof ThreadPoolExecutor)
+        {
+            final ThreadPoolExecutor tpe = (ThreadPoolExecutor)_executor;
+            // getActiveCount() locks the thread pool, so execute it last
+            return tpe.getPoolSize() == tpe.getMaximumPoolSize() &&
+                    tpe.getQueue().size() >= tpe.getPoolSize() - tpe.getActiveCount();
+        }
+        return false;
+    }
+
+    /* ------------------------------------------------------------ */
+    public void join() throws InterruptedException
+    {
+        _executor.awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS);
+    }
+
+    /* ------------------------------------------------------------ */
+    @Override
+    protected void doStop() throws Exception
+    {
+        super.doStop();
+        _executor.shutdownNow();
+    }
+}