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/**
* This task is put in a Timer thread and is executed every N seconds. This
* task prints in the output the monitorabled of the ORB.
* @author Darpan Dinker, $Author: tcfujii $
* @version $Revision: 1.4 $ on $Date: 2007/05/05 05:32:07 $
* @since jdk1.4
* Note: None of the methods in this class are synchronized, it is assumed
* that code which is using this class would take care of synchronization
* if there is a need. Most cases where initialization of these monitorables
* is done during server startup should not require any kind of
* synchronization
*/
// START IASRI 4682740 - support standalone monitoring
package com.sun.enterprise.util;
import java.util.logging.Level;
import com.sun.enterprise.util.logging.Debug;
import com.sun.enterprise.corba.ee.internal.util.LogWrap;
import java.util.ArrayList;
import java.util.TimerTask;
import java.util.Iterator;
public class MonitorTask extends java.util.TimerTask {
private static boolean initialized = false;
private static boolean needORBMonitoring = false;
private static boolean needEJBMonitoring = false;
private static boolean needJDBCMonitoring = false;
private static ArrayList monitorableList = null;
private static long schedPeriod = 180000; // 3 minutes default
private static java.util.Timer timer;
/**
* This method will read the System properties and look for
* "MONITOR_ORB".
* "MONITOR_EJB".
* "MONITOR_JDBC".
* If the string exists, the
* monitoring task shall be created at every
* MONITOR_TIME_PERIOD_SECONDS
* if provided too, otherwise defaults will be taken for scheduling period.
*/
private synchronized static boolean isMonitoring () {
if (!initialized) {
try {
String str1=System.getProperties().getProperty("MONITOR_ORB");
String str2=System.getProperties().getProperty("MONITOR_EJB");
String str3=System.getProperties().getProperty("MONITOR_JDBC");
String strm=System.getProperties().getProperty("MONITOR_TIME_PERIOD_SECONDS");
if( null!=str1 ) {
if ( str1.startsWith("true") || str1.startsWith("TRUE") ) {
needORBMonitoring = true;
}
}
if ( null!=str2 ) {
if ( str2.startsWith("true") || str2.startsWith("TRUE") ) {
needEJBMonitoring = true;
}
}
if ( null!=str3 ) {
if ( str3.startsWith("true") || str3.startsWith("TRUE") ) {
needJDBCMonitoring = true;
}
}
if (needORBMonitoring || needEJBMonitoring || needJDBCMonitoring) {
if(null!=strm) {
schedPeriod = 1000 * Long.parseLong(strm);
}
}
} catch(Exception e) {
LogWrap.logger.log(Level.FINE,
"MINOR: Unable to start a performance monitoring task > " + e);
}
if (needORBMonitoring || needEJBMonitoring || needJDBCMonitoring) {
monitorableList = new ArrayList();
timer = new java.util.Timer();
timer.schedule(new MonitorTask(), schedPeriod, schedPeriod);
LogWrap.logger.log(Level.SEVERE,
"Starting the MonitorTask every "+schedPeriod+" milliseconds.");
}
initialized = true;
}
return (needORBMonitoring || needEJBMonitoring || needJDBCMonitoring);
}
/**
* Other subsystems in the ORB can use this method to add monitorable
* entities which are then dumped at the preset intervals.
* The only requirement for adding an object to the list is that it should
* implement the toString interface so that details about the object are
* dumped
*/
public static void addORBMonitorable(Object monitorable) {
if (isMonitoring() && needORBMonitoring) {
monitorableList.add(monitorable);
}
}
public static void addEJBMonitorable(Object monitorable) {
if (isMonitoring() && needEJBMonitoring) {
monitorableList.add(monitorable);
}
}
public static void addJDBCMonitorable(Object monitorable) {
if (isMonitoring() && needJDBCMonitoring) {
monitorableList.add(monitorable);
}
}
public static ArrayList getMonitorableList() {
return monitorableList;
}
/**
* When an object implementing interface <code>Runnable</code> is used
* to create a thread, starting the thread causes the object's
* <code>run</code> method to be called in that separately executing
* thread.
* <p>
* The general contract of the method <code>run</code> is that it may
* take any action whatsoever.
*
* @see java.lang.Thread#run()
*/
public void run() {
StringBuffer sb = new StringBuffer ();
try {
boolean first = true;
sb.append("MONITORING : ");
Iterator iter = MonitorTask.getMonitorableList().iterator();
while (iter.hasNext()) {
if (first == false) {
sb.append(", ");
} else {
first = false;
}
sb.append(iter.next().toString());
}
LogWrap.logger.log(Level.SEVERE, sb.toString() );
} catch(Exception e) {
LogWrap.logger.log(Level.FINE, "MonitorTask received an exception > " + e);
}
}
protected java.util.Timer getTimer() {
return timer;
}
}
// End IASRI 4682740 - ORB to support standalone monitoring
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