Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
ConnectorInstanceHandler |
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| 0.0;0 | ||||
ConnectorInstanceHandler$ConcurrentQueueConnectorInstanceHandler |
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| 0.0;0 | ||||
ConnectorInstanceHandler$ConcurrentQueueDelegateCIH |
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| 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 | * | |
7 | * The contents of this file are subject to the terms of either the GNU | |
8 | * General Public License Version 2 only ("GPL") or the Common Development | |
9 | * and Distribution License("CDDL") (collectively, the "License"). You | |
10 | * may not use this file except in compliance with the License. You can obtain | |
11 | * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html | |
12 | * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific | |
13 | * language governing permissions and limitations under the License. | |
14 | * | |
15 | * When distributing the software, include this License Header Notice in each | |
16 | * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt. | |
17 | * Sun designates this particular file as subject to the "Classpath" exception | |
18 | * as provided by Sun in the GPL Version 2 section of the License file that | |
19 | * accompanied this code. If applicable, add the following below the License | |
20 | * Header, with the fields enclosed by brackets [] replaced by your own | |
21 | * identifying information: "Portions Copyrighted [year] | |
22 | * [name of copyright owner]" | |
23 | * | |
24 | * Contributor(s): | |
25 | * | |
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] | |
28 | * elects to include this software in this distribution under the [CDDL or GPL | |
29 | * Version 2] license." If you don't indicate a single choice of license, a | |
30 | * recipient has the option to distribute your version of this file under | |
31 | * either the CDDL, the GPL Version 2 or to extend the choice of license to | |
32 | * its licensees as provided above. However, if you add GPL Version 2 code | |
33 | * and therefore, elected the GPL Version 2 license, then the option applies | |
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; | |
40 | ||
41 | import java.util.concurrent.Callable; | |
42 | import java.util.concurrent.ConcurrentLinkedQueue; | |
43 | ||
44 | /** | |
45 | * This interface is responsible of handling {@link ConnectorHandler} | |
46 | * instance creation. This interface can be used to implement a connection | |
47 | * pooling mechanism. | |
48 | * | |
49 | * @param E ConnectorHandler implementation this pool will manage | |
50 | * @author Jeanfrancois | |
51 | */ | |
52 | public interface ConnectorInstanceHandler<E extends ConnectorHandler> { | |
53 | ||
54 | ||
55 | /** | |
56 | * Acquire a {@link ConnectorHandler} | |
57 | * @return instance of ConnectorHandler | |
58 | */ | |
59 | public E acquire(); | |
60 | ||
61 | ||
62 | /** | |
63 | * Release a {@link ConnectorHandler} | |
64 | * @param connectorHandler release connector handler | |
65 | */ | |
66 | public void release(E connectorHandler); | |
67 | ||
68 | /** | |
69 | * Concurrent Queue ConnectorInstanceHandler implementation | |
70 | * @param E ConnectorHandler implementation this pool will manage | |
71 | */ | |
72 | public abstract class ConcurrentQueueConnectorInstanceHandler<E extends ConnectorHandler> implements ConnectorInstanceHandler<E> { | |
73 | /** | |
74 | * Simple queue used to pool {@link ConnectorHandler} | |
75 | */ | |
76 | private ConcurrentLinkedQueue<E> pool; | |
77 | ||
78 | ||
79 | 120 | public ConcurrentQueueConnectorInstanceHandler(){ |
80 | 120 | pool = new ConcurrentLinkedQueue<E>(); |
81 | 120 | } |
82 | ||
83 | /** | |
84 | * Acquire a {@link ConnectorHandler} | |
85 | */ | |
86 | public E acquire(){ | |
87 | 185 | E connectorHandler = pool.poll(); |
88 | 185 | if (connectorHandler == null){ |
89 | 14 | connectorHandler = newInstance(); |
90 | } | |
91 | 185 | return connectorHandler; |
92 | } | |
93 | ||
94 | /** | |
95 | * Release a {@link ConnectorHandler} | |
96 | */ | |
97 | public void release(E connectorHandler){ | |
98 | 184 | pool.offer(connectorHandler); |
99 | 184 | } |
100 | ||
101 | public abstract E newInstance(); | |
102 | } | |
103 | ||
104 | /** | |
105 | * Concurrent Queue ConnectorInstanceHandler implementation | |
106 | * @param E ConnectorHandler implementation this pool will manage | |
107 | */ | |
108 | public class ConcurrentQueueDelegateCIH<E extends ConnectorHandler> | |
109 | extends ConcurrentQueueConnectorInstanceHandler<E> { | |
110 | ||
111 | // ConnectorHandler instance creator | |
112 | private Callable<E> delegate; | |
113 | ||
114 | 119 | public ConcurrentQueueDelegateCIH(Callable<E> delegate) { |
115 | 119 | this.delegate = delegate; |
116 | 119 | } |
117 | ||
118 | public E newInstance() { | |
119 | try { | |
120 | 13 | return delegate.call(); |
121 | 0 | } catch(Exception e) { |
122 | 0 | throw new IllegalStateException("Unexpected exception", e); |
123 | } | |
124 | } | |
125 | } | |
126 | } |