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


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 pending requests on this backend
30  *
31  * @author <a HREF="mailto:Nicolas.Modrzyk@inrialpes.fr">Nicolas Modrzyk</a>
32  */
33 public class PendingRequestsCollector extends AbstractBackendDataCollector
34 {
35   private static final long serialVersionUID = 2088946444040664408L;
36
37   /**
38    * @param backendName of the backend to get data from
39    * @param virtualDatabaseName database accessed to get data
40    */
41   public PendingRequestsCollector(String JavaDoc backendName, String JavaDoc virtualDatabaseName)
42   {
43     super(backendName, virtualDatabaseName);
44   }
45
46   /**
47    * @see org.continuent.sequoia.common.jmx.monitoring.AbstractDataCollector#collectValue()
48    */
49   public long getValue(Object JavaDoc backend)
50   {
51     return ((DatabaseBackend) backend).getPendingRequests().size();
52   }
53
54   /**
55    * @see org.continuent.sequoia.common.jmx.monitoring.AbstractDataCollector#getDescription()
56    */
57   public String JavaDoc getDescription()
58   {
59     return Translate.get("monitoring.backend.pending.requests"); //$NON-NLS-1$
60 }
61 }
62
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