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Java > Open Source Codes > org > apache > geronimo > console > jsr77 > Jsr77Lookup


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 implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 package org.apache.geronimo.console.jsr77;
18
19 import javax.servlet.http.HttpSession JavaDoc;
20 import javax.management.j2ee.statistics.JVMStats JavaDoc;
21 import javax.management.j2ee.statistics.BoundedRangeStatistic JavaDoc;
22 import uk.ltd.getahead.dwr.WebContextFactory;
23 import org.apache.geronimo.console.util.PortletManager;
24 import org.apache.geronimo.console.util.ManagementHelper;
25 import org.apache.geronimo.management.geronimo.J2EEDomain;
26 import org.apache.geronimo.management.StatisticsProvider;
27 import org.apache.geronimo.management.geronimo.J2EEServer;
28 import org.apache.geronimo.management.geronimo.JVM;
29
30 /**
31  * Looks up JSR-77 statistics in response to AJAX calls from portlets.
32  *
33  * @version $Rev: 476061 $ $Date: 2006-11-17 01:36:50 -0500 (Fri, 17 Nov 2006) $
34  */
35 public class Jsr77Lookup {
36     public DynamicServerInfo getJavaVMStatistics() {
37         HttpSession JavaDoc session = WebContextFactory.get().getSession(false);
38         ManagementHelper helper = PortletManager.getManagementHelper(session);
39         J2EEDomain[] domains = helper.getDomains();
40         J2EEServer[] servers = domains[0].getServerInstances();
41         JVM[] jvms = helper.getJavaVMs(servers[0]);
42         long elapsed = System.currentTimeMillis() - jvms[0].getKernelBootTime().getTime();
43         if(jvms[0].isStatisticsProvider()) {
44             JVMStats JavaDoc stats = (JVMStats JavaDoc) ((StatisticsProvider)jvms[0]).getStats();
45             BoundedRangeStatistic JavaDoc heap = stats.getHeapSize();
46             return new DynamicServerInfo(heap.getCurrent(), heap.getHighWaterMark(), heap.getUpperBound(), elapsed);
47         } else {
48             return new DynamicServerInfo(elapsed);
49         }
50     }
51 }
52
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