1 //
2 // ========================================================================
3 // Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.util.thread.strategy;
20
21 import java.util.concurrent.Executor;
22
23 import org.eclipse.jetty.util.log.Log;
24 import org.eclipse.jetty.util.log.Logger;
25 import org.eclipse.jetty.util.thread.ExecutionStrategy;
26
27 /**
28 * <p>A strategy where the caller thread iterates over task production, submitting each
29 * task to an {@link Executor} for execution.</p>
30 */
31 public class ProduceExecuteConsume implements ExecutionStrategy
32 {
33 private static final Logger LOG = Log.getLogger(ExecutionStrategy.class);
34 private final Producer _producer;
35 private final Executor _executor;
36
37 public ProduceExecuteConsume(Producer producer, Executor executor)
38 {
39 this._producer = producer;
40 this._executor = executor;
41 }
42
43 @Override
44 public void execute()
45 {
46 // Iterate until we are complete.
47 while (true)
48 {
49 // Produce a task.
50 Runnable task = _producer.produce();
51 if (LOG.isDebugEnabled())
52 LOG.debug("{} PER produced {}",_producer,task);
53
54 if (task == null)
55 break;
56
57 // Execute the task.
58 _executor.execute(task);
59 }
60 }
61
62 @Override
63 public void dispatch()
64 {
65 execute();
66 }
67 }