1 /*
2 * Copyright (c) 2002-2022, City of 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 * LuteceConnectionProxy : proxy implementation of {@link LuteceConnection} This class should be removed when java5 support is dropped.
45 *
46 */
47 public class LuteceConnectionProxy implements InvocationHandler
48 {
49 /**
50 * Close method name
51 */
52 private static final String METHOD_CLOSE = "close";
53
54 /**
55 * Close connection method name (from {@link LuteceConnection}
56 */
57 private static final String METHOD_CLOSE_CONNECTION = "closeConnection";
58 private ConnectionPool _pool;
59 private Connection _connection;
60
61 /**
62 * Private constructor
63 *
64 * @param pool
65 * the pool to use
66 * @param connection
67 * the actual connection
68 */
69 LuteceConnectionProxy( ConnectionPool pool, Connection connection )
70 {
71 _pool = pool;
72 _connection = connection;
73 }
74
75 /**
76 * Catches close() and closeConnection() method. close() calls _pool.freeConnection, and closeConnection() calls _connection.close().
77 *
78 * @param proxy
79 * the proxy
80 * @param method
81 * the method
82 * @param args
83 * the args
84 * @return the object
85 * @throws Throwable
86 * the throwable
87 */
88 @Override
89 public Object invoke( Object proxy, Method method, Object [ ] args ) throws Throwable
90 {
91 Object oReturn;
92
93 if ( METHOD_CLOSE.equals( method.getName( ) ) )
94 {
95 _pool.freeConnection( (Connection) proxy );
96 oReturn = null;
97 }
98 else
99 if ( METHOD_CLOSE_CONNECTION.equals( method.getName( ) ) )
100 {
101 _connection.close( );
102 oReturn = null;
103 }
104 else
105 {
106 try
107 {
108 oReturn = method.invoke( _connection, args );
109 }
110 catch( InvocationTargetException e )
111 {
112 throw e.getCause( );
113 }
114 }
115
116 return oReturn;
117 }
118 }