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Java > Open Source Codes > org > continuent > sequoia > common > jmx > monitoring > backend > ActiveConnectionsCollector


1 /**
2  * Sequoia: Database clustering technology.
3  * Copyright (C) 2002-2004 French National Institute For Research In Computer
4  * Science And Control (INRIA).
5  * Copyright (C) 2005 AmicoSoft, Inc. dba Emic Networks
6  * Contact: sequoia@continuent.org
7  *
8  * Licensed under the Apache License, Version 2.0 (the "License");
9  * you may not use this file except in compliance with the License.
10  * You may obtain a copy of the License at
11  *
12  * http://www.apache.org/licenses/LICENSE-2.0
13  *
14  * Unless required by applicable law or agreed to in writing, software
15  * distributed under the License is distributed on an "AS IS" BASIS,
16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17  * See the License for the specific language governing permissions and
18  * limitations under the License.
19  *
20  * Initial developer(s): Nicolas Modrzyk.
21  * Contributor(s):
22  */
23
24 package org.continuent.sequoia.common.jmx.monitoring.backend;
25
26 import org.continuent.sequoia.common.i18n.Translate;
27 import org.continuent.sequoia.controller.backend.DatabaseBackend;
28
29 /**
30  * Return total of currently active connections on this backend
31  *
32  * @author <a HREF="mailto:Nicolas.Modrzyk@inrialpes.fr">Nicolas Modrzyk </a>
33  */
34 public class ActiveConnectionsCollector extends AbstractBackendDataCollector
35 {
36   private static final long serialVersionUID = -819859983753949567L;
37
38   /**
39    * new collector
40    *
41    * @param backendName of the backend
42    * @param virtualDatabaseName of the database
43    */
44   public ActiveConnectionsCollector(String JavaDoc backendName,
45       String JavaDoc virtualDatabaseName)
46   {
47     super(backendName, virtualDatabaseName);
48   }
49
50   /**
51    * Get total number of active connections on the given backend.
52    *
53    * @param backend backend
54    * @return total number of active connections
55    * @see org.continuent.sequoia.common.jmx.monitoring.AbstractDataCollector#collectValue()
56    */
57   public long getValue(Object JavaDoc backend)
58   {
59     return ((DatabaseBackend) backend).getTotalActiveConnections();
60   }
61
62   /**
63    * @see org.continuent.sequoia.common.jmx.monitoring.AbstractDataCollector#getDescription()
64    */
65   public String JavaDoc getDescription()
66   {
67     return Translate.get("monitoring.backend.active.connections"); //$NON-NLS-1$
68 }
69 }
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