Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
ConcurrentLinkedQueuePool |
|
| 0.0;0 |
1 | /* | |
2 | * | |
3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
4 | * | |
5 | * Copyright 2007-2008 Sun Microsystems, Inc. All rights reserved. | |
6 | * | |
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8 | * General Public License Version 2 only ("GPL") or the Common Development | |
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20 | * Header, with the fields enclosed by brackets [] replaced by your own | |
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24 | * Contributor(s): | |
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26 | * If you wish your version of this file to be governed by only the CDDL or | |
27 | * only the GPL Version 2, indicate your decision by adding "[Contributor] | |
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34 | * only if the new code is made subject to such option by the copyright | |
35 | * holder. | |
36 | * | |
37 | */ | |
38 | ||
39 | package com.sun.grizzly.util; | |
40 | ||
41 | import java.util.concurrent.ConcurrentLinkedQueue; | |
42 | ||
43 | /** | |
44 | * <code>ObjectPool</code> implementation based on {@link ConcurrentLinkedQueue} | |
45 | * | |
46 | * @author Alexey Stashok | |
47 | */ | |
48 | 93 | public abstract class ConcurrentLinkedQueuePool<E> implements ObjectPool<E> { |
49 | private volatile ConcurrentLinkedQueue<E> pool; | |
50 | ||
51 | public abstract E newInstance(); | |
52 | ||
53 | public E poll() { | |
54 | 988906 | if (pool == null) { |
55 | 76 | synchronized(this) { |
56 | 76 | if (pool == null) { |
57 | 76 | pool = new ConcurrentLinkedQueue<E>(); |
58 | } | |
59 | 76 | } |
60 | } | |
61 | ||
62 | 988908 | E object = pool.poll(); |
63 | 988904 | if (object == null) { |
64 | 1313 | object = newInstance(); |
65 | } | |
66 | ||
67 | 988895 | return object; |
68 | } | |
69 | ||
70 | public void offer(E object) { | |
71 | 988866 | if (pool != null) { |
72 | 988857 | pool.offer(object); |
73 | } | |
74 | 988864 | } |
75 | } |