/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.geronimo.monitoring.jmx.snapshot;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Set;
import javax.management.MBeanServer;
import org.apache.geronimo.monitoring.jmx.MasterRemoteControlJMX;
import org.apache.geronimo.monitoring.snapshot.SnapshotConfigXMLBuilder;
/**
* Thread that is in charge of executing every x milliseconds. Upon each
* iteration, a snapshot of the server's information is recorded.
*/
public class SnapshotThread extends Thread {
volatile private long SNAPSHOT_DURATION;
private MBeanServer mbServer = null;
int threadStatus = 1;
// list of mbean names that we will be taking snapshots of
private ArrayList<String> mbeanNames;
public SnapshotThread(long snapshot_length, MBeanServer mbServer) {
SNAPSHOT_DURATION = snapshot_length;
this.mbServer = mbServer;
mbeanNames = new ArrayList<String>();
}
/**
* Gets the elapsed time in milliseconds between each snapshot.
*
* @return long
*/
public long getSnapshotDuration() {
return SNAPSHOT_DURATION;
}
public Integer SnapshotStatus() {
return threadStatus;
}
/**
* Adds the mbean name to list in memory. To update the snapshot-config.xml
* coder must use SnapshotConfigXMLBuilder class.
*
* @param mbeanName
*/
public void addMBeanForSnapshot(String mbeanName) {
mbeanNames.add(mbeanName);
}
/**
* Removes the mbean name to list in memory. To update the
* snapshot-config.xml coder must use SnapshotConfigXMLBuilder class.
*
* @param mbeanName
*/
public void removeMBeanForSnapshot(String mbeanName) {
mbeanNames.remove(mbeanName);
}
/**
* Sets the elapsed time in milliseconds between each snapshot.
*
* @param snapshot_length
*/
public void setSnapshotDuration(long snapshot_length) {
if (snapshot_length == Long.MAX_VALUE)
threadStatus = -1;
SNAPSHOT_DURATION = snapshot_length;
}
public void run() {
// get any saved mbean names from snapshot-config.xml
mbeanNames = SnapshotConfigXMLBuilder.getMBeanNames();
// in the case where nothing is present, grab a set of default mbeans
if (mbeanNames.size() <= 0) {
mbeanNames = getDefaultMBeanList();
}
// pause the thread from running every SNAPSHOT_DURATION seconds
loop:while (true) {
try {
// store the data
SnapshotProcessor.takeSnapshot();
// wait for next snapshot
for(long nSleep = SNAPSHOT_DURATION/1000; nSleep>0; nSleep--)
{
Thread.sleep(1000);
if(SNAPSHOT_DURATION == Long.MAX_VALUE)
break loop;
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
// flag turned on to know when the thread stops
threadStatus = 0;
}
/**
* @return A list of all default mbeans; namely, all connector or container
* mbean names Prereq: in order to be a connector or container mbean
* the name must contain "Connector"/"Container" and
* "Tomcat"/"Jetty"
*/
private ArrayList<String> getDefaultMBeanList() {
Set<String> mbeans = (new MasterRemoteControlJMX())
.getStatisticsProviderMBeanNames();
ArrayList<String> retval = new ArrayList<String>();
for (Iterator it = mbeans.iterator(); it.hasNext();) {
String name = (String) it.next();
if (((name.contains("Connector") || name.contains("Container"))
&& (name.contains("Jetty") || name.contains("Tomcat"))|| name.contains("JVM"))) {
// this is a connector, so add to the list
retval.add(name);
// update the snapshot-config.xml to include these
SnapshotConfigXMLBuilder.addMBeanName(name);
}
}
return retval;
}
}