1 /*
2 * Copyright (c) 2002-2014, Mairie de Paris
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice
10 * and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice
13 * and the following disclaimer in the documentation and/or other materials
14 * provided with the distribution.
15 *
16 * 3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 *
32 * License 1.0
33 */
34 package fr.paris.lutece.util.pool.service;
35
36 import java.lang.reflect.InvocationHandler;
37 import java.lang.reflect.InvocationTargetException;
38 import java.lang.reflect.Method;
39
40 import java.sql.Connection;
41
42
43 /**
44 *
45 * LuteceConnectionProxy : proxy implementation of {@link LuteceConnection}
46 * This class should be removed when java5 support is dropped.
47 *
48 */
49 public class LuteceConnectionProxy implements InvocationHandler
50 {
51 /**
52 * Close method name
53 */
54 private static final String METHOD_CLOSE = "close";
55
56 /**
57 * Close connection method name (from {@link LuteceConnection}
58 */
59 private static final String METHOD_CLOSE_CONNECTION = "closeConnection";
60 private ConnectionPool _pool;
61 private Connection _connection;
62
63 /**
64 * Private constructor
65 * @param pool the pool to use
66 * @param connection the actual connection
67 */
68 LuteceConnectionProxy( ConnectionPool pool, Connection connection )
69 {
70 _pool = pool;
71 _connection = connection;
72 }
73
74 /**
75 * Catches close() and closeConnection() method.
76 * close() calls _pool.freeConnection, and closeConnection() calls _connection.close().
77 *
78 * @param proxy the proxy
79 * @param method the method
80 * @param args the args
81 * @return the object
82 * @throws Throwable the throwable
83 */
84 @Override
85 public Object invoke( Object proxy, Method method, Object[] args )
86 throws Throwable
87 {
88 Object oReturn;
89
90 if ( METHOD_CLOSE.equals( method.getName( ) ) )
91 {
92 _pool.freeConnection( (Connection) proxy );
93 oReturn = null;
94 }
95 else if ( METHOD_CLOSE_CONNECTION.equals( method.getName( ) ) )
96 {
97 _connection.close( );
98 oReturn = null;
99 }
100 else
101 {
102 try {
103 oReturn = method.invoke( _connection, args );
104 } catch (InvocationTargetException e) {
105 throw e.getCause();
106 }
107 }
108
109 return oReturn;
110 }
111 }