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


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 package org.continuent.sequoia.common.jmx.monitoring.backend;
24
25 import org.continuent.sequoia.common.i18n.Translate;
26 import org.continuent.sequoia.controller.backend.DatabaseBackend;
27
28 /**
29  * Return total of currently active transactions on this backend
30  *
31  * @author <a HREF="mailto:Nicolas.Modrzyk@inrialpes.fr">Nicolas Modrzyk</a>
32  */

33 public class ActiveTransactionCollector extends AbstractBackendDataCollector
34 {
35   private static final long serialVersionUID = -4163697846536844217L;
36
37   /**
38    * @param backendName of the backend to get data from
39    * @param virtualDatabaseName database accessed to get data
40    */

41   public ActiveTransactionCollector(String JavaDoc backendName,
42       String JavaDoc virtualDatabaseName)
43   {
44     super(backendName, virtualDatabaseName);
45   }
46
47   /**
48    * Get total number of active transactions on the given backend.
49    *
50    * @param backend backend
51    * @return total number of active transactions
52    * @see org.continuent.sequoia.common.jmx.monitoring.AbstractDataCollector#collectValue()
53    */

54   public long getValue(Object JavaDoc backend)
55   {
56     return ((DatabaseBackend) backend).getActiveTransactions().size();
57   }
58
59   /**
60    * @see org.continuent.sequoia.common.jmx.monitoring.AbstractDataCollector#getDescription()
61    */

62   public String JavaDoc getDescription()
63   {
64     return Translate.get("monitoring.backend.active.transactions"); //$NON-NLS-1$
65
}
66
67 }
68
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