Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
CountingRedeliveryHandlerFactory |
|
| 0.0;0 |
1 | /* | |
2 | * $Id: CountingRedeliveryHandlerFactory.java 20501 2010-12-08 00:52:19Z tcarlson $ | |
3 | * -------------------------------------------------------------------------------------- | |
4 | * Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com | |
5 | * | |
6 | * The software in this package is published under the terms of the CPAL v1.0 | |
7 | * license, a copy of which has been included with this distribution in the | |
8 | * LICENSE.txt file. | |
9 | */ | |
10 | ||
11 | package org.mule.transport.jms.redelivery; | |
12 | ||
13 | ||
14 | import java.util.concurrent.atomic.AtomicReference; | |
15 | ||
16 | /** | |
17 | * @see CountingRedeliveryHandler | |
18 | */ | |
19 | 0 | public class CountingRedeliveryHandlerFactory implements RedeliveryHandlerFactory |
20 | { | |
21 | ||
22 | 0 | protected AtomicReference<RedeliveryHandler> handler = new AtomicReference<RedeliveryHandler>(null); |
23 | ||
24 | public RedeliveryHandler create() | |
25 | { | |
26 | RedeliveryHandler result; | |
27 | ||
28 | // initialize, accounting for concurrency | |
29 | 0 | if (handler.get() == null) |
30 | { | |
31 | 0 | final CountingRedeliveryHandler newInstance = new CountingRedeliveryHandler(); |
32 | 0 | boolean ok = handler.compareAndSet(null, newInstance); |
33 | 0 | if (!ok) |
34 | { | |
35 | // someone was faster to initialize it, use this ref instead | |
36 | 0 | result = handler.get(); |
37 | } | |
38 | else | |
39 | { | |
40 | 0 | result = newInstance; |
41 | } | |
42 | 0 | } |
43 | else | |
44 | { | |
45 | // just re-use existing stateful handler | |
46 | 0 | result = handler.get(); |
47 | } | |
48 | ||
49 | 0 | return result; |
50 | } | |
51 | ||
52 | } | |
53 | ||
54 |