1 //
2 // ========================================================================
3 // Copyright (c) 1995-2013 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;
20
21 import org.eclipse.jetty.util.component.LifeCycle;
22
23 /* ------------------------------------------------------------ */
24 /** ThreadPool.
25 *
26 *
27 */
28 public interface ThreadPool
29 {
30 /* ------------------------------------------------------------ */
31 public abstract boolean dispatch(Runnable job);
32
33 /* ------------------------------------------------------------ */
34 /**
35 * Blocks until the thread pool is {@link LifeCycle#stop stopped}.
36 */
37 public void join() throws InterruptedException;
38
39 /* ------------------------------------------------------------ */
40 /**
41 * @return The total number of threads currently in the pool
42 */
43 public int getThreads();
44
45 /* ------------------------------------------------------------ */
46 /**
47 * @return The number of idle threads in the pool
48 */
49 public int getIdleThreads();
50
51 /* ------------------------------------------------------------ */
52 /**
53 * @return True if the pool is low on threads
54 */
55 public boolean isLowOnThreads();
56
57
58 /* ------------------------------------------------------------ */
59 /* ------------------------------------------------------------ */
60 public interface SizedThreadPool extends ThreadPool
61 {
62 public int getMinThreads();
63 public int getMaxThreads();
64 public void setMinThreads(int threads);
65 public void setMaxThreads(int threads);
66 }
67 }