Source Code Cross Referenced for ConnectionProvider.java in  » Net » openfire » org » jivesoftware » database » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » openfire » org.jivesoftware.database 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /**
02:         * $RCSfile$
03:         * $Revision: 9758 $
04:         * $Date: 2008-01-12 17:54:08 -0800 (Sat, 12 Jan 2008) $
05:         *
06:         * Copyright (C) 2004 Jive Software. All rights reserved.
07:         *
08:         * This software is published under the terms of the GNU Public License (GPL),
09:         * a copy of which is included in this distribution.
10:         */package org.jivesoftware.database;
11:
12:        import java.sql.Connection;
13:        import java.sql.SQLException;
14:
15:        /**
16:         * Abstract class that defines the connection provider framework. Other classes
17:         * extend this abstract class to make connection to actual data sources.<p>
18:         * <p/>
19:         * It is expected that each subclass be a JavaBean, so that properties of
20:         * the connection provider are exposed through bean introspection.
21:         *
22:         * @author Jive Software
23:         */
24:        public interface ConnectionProvider {
25:
26:            /**
27:             * Returns true if this connection provider provides connections out
28:             * of a connection pool. Implementing and using connection providers that
29:             * are pooled is strongly recommended, as they greatly increase the speed
30:             * of Jive.
31:             *
32:             * @return true if the Connection objects returned by this provider are
33:             *         pooled.
34:             */
35:            public boolean isPooled();
36:
37:            /**
38:             * Returns a database connection. When a Jive component is done with a
39:             * connection, it will call the close method of that connection. Therefore,
40:             * connection pools with special release methods are not directly
41:             * supported by the connection provider infrastructure. Instead, connections
42:             * from those pools should be wrapped such that calling the close method
43:             * on the wrapper class will release the connection from the pool.
44:             *
45:             * @return a Connection object.
46:             * @throws SQLException is an SQL error occured while retrieving the connection.
47:             */
48:            public Connection getConnection() throws SQLException;
49:
50:            /**
51:             * Starts the connection provider. For some connection providers, this
52:             * will be a no-op. However, connection provider users should always call
53:             * this method to make sure the connection provider is started.
54:             */
55:            public void start();
56:
57:            /**
58:             * This method should be called whenever properties have been changed so
59:             * that the changes will take effect.
60:             */
61:            public void restart();
62:
63:            /**
64:             * Tells the connection provider to destroy itself. For many connection
65:             * providers, this will essentially result in a no-op. However,
66:             * connection provider users should always call this method when changing
67:             * from one connection provider to another to ensure that there are no
68:             * dangling database connections.
69:             */
70:            public void destroy();
71:        }
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