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Java > Open Source Codes > org > apache > avalon > excalibur > datasource > cluster > IndexedDataSourceCluster


1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License. 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
14  * implied.
15  *
16  * See the License for the specific language governing permissions and
17  * limitations under the License.
18  */
19
20 package org.apache.avalon.excalibur.datasource.cluster;
21
22 import java.sql.Connection JavaDoc;
23 import java.sql.SQLException JavaDoc;
24
25 import org.apache.avalon.excalibur.datasource.DataSourceComponent;
26
27 /**
28  * @author <a HREF="mailto:dev@avalon.apache.org">Avalon Development Team</a>
29  * @version CVS $Revision: 1.4 $ $Date: 2004/02/28 11:47:20 $
30  * @since 4.1
31  */
32 public interface IndexedDataSourceCluster
33     extends DataSourceComponent
34 {
35     /**
36      * The name of the role for convenience
37      */
38     String JavaDoc ROLE = IndexedDataSourceCluster.class.getName();
39
40     /**
41      * Returns the number of DataSources in the cluster.
42      *
43      * @return size of the cluster.
44      */
45     int getClusterSize();
46
47     /**
48      * Gets a Connection to a database given an index.
49      *
50      * @param index Index of the DataSource for which a connection is to be returned.
51      *
52      * @throws org.apache.avalon.excalibur.datasource.NoValidConnectionException when there is no valid Connection wrapper
53      * available in the classloader or when the index is not valid.
54      *
55      * @throws org.apache.avalon.excalibur.datasource.NoAvailableConnectionException when there are no more available
56      * Connections in the pool.
57      */
58     Connection JavaDoc getConnectionForIndex( int index ) throws SQLException JavaDoc;
59 }
60
61
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