ConnectionFactory


1   package org.apache.ojb.broker.accesslayer;
2   
3   /* Copyright 2002-2005 The Apache Software Foundation
4    *
5    * Licensed under the Apache License, Version 2.0 (the "License");
6    * you may not use this file except in compliance with the License.
7    * You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  import org.apache.ojb.broker.metadata.JdbcConnectionDescriptor;
19  
20  import java.sql.Connection  ;
21  
22  /**
23   * ConnectionFactory is responsible to lookup and release the
24   * connections used by the
25   * {@link org.apache.ojb.broker.accesslayer.ConnectionManagerIF}
26   * implementation.
27   *
28   * @version $Id: ConnectionFactory.java,v 1.11.2.1 2005/04/26 03:41:35 mkalen Exp $
29   * @see org.apache.ojb.broker.accesslayer.ConnectionFactoryPooledImpl
30   * @see org.apache.ojb.broker.accesslayer.ConnectionFactoryNotPooledImpl
31   * @see org.apache.ojb.broker.accesslayer.ConnectionFactoryDBCPImpl
32   * @see org.apache.ojb.broker.accesslayer.ConnectionFactoryManagedImpl
33   */
34  public interface ConnectionFactory
35  {
36  
37      /**
38       * Lookup a connection from the connection factory implementation.
39       */
40      Connection   lookupConnection(JdbcConnectionDescriptor jcd) throws LookupException;
41  
42      /**
43       * Release connection - CAUTION: Release every connection after use to avoid abandoned connections.
44       * Depending on the used implementation connection will be closed, returned to pool, ...
45       */
46      void releaseConnection(JdbcConnectionDescriptor jcd, Connection   con);
47  
48      /**
49       * Release all resources
50       * used by the implementing class (e.g. connection pool, ...)
51       * for the given connection descriptor.
52       */
53      void releaseAllResources();
54  
55  }
56
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