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/*
* $Id: JVMStatsImpl.java,v 1.4 2007/05/05 05:35:54 tcfujii Exp $
* $Date: 2007/05/05 05:35:54 $
* $Revision: 1.4 $
*/
package com.sun.enterprise.server.stats;
import javax.management.j2ee.statistics.Statistic;
import javax.management.j2ee.statistics.BoundedRangeStatistic;
import javax.management.j2ee.statistics.CountStatistic;
import javax.management.j2ee.statistics.JVMStats;
import com.sun.enterprise.admin.monitor.stats.GenericStatsImpl;
import com.sun.enterprise.admin.monitor.stats.CountStatisticImpl;
import com.sun.enterprise.admin.monitor.stats.BoundedRangeStatisticImpl;
import com.sun.enterprise.admin.monitor.stats.MutableStatistic;
import com.sun.enterprise.admin.monitor.stats.MutableCountStatistic;
import com.sun.enterprise.admin.monitor.stats.MutableCountStatisticImpl;
import com.sun.enterprise.admin.monitor.stats.MutableBoundedRangeStatisticImpl;
import com.sun.enterprise.util.i18n.StringManager;
/**
* Provides an implementation of the JVMStats interface, defined as part
* of JSR77.
* It specifies the monitoring statistics for a JVM
*/
public class JVMStatsImpl implements JVMStats {
private final long initTime;
private GenericStatsImpl baseStatsImpl;
private MutableCountStatistic uptime;
private MutableBoundedRangeStatisticImpl heapSize;
private static final String STATS_INTERFACE_NAME =
"javax.management.j2ee.statistics.JVMStats";
private static StringManager sm =
StringManager.getManager(JVMStatsImpl.class);
/**
* Constructor for JVMStatsImpl
* In addition to initializing the MutableStatistic objects, we also
* instantiate a GenericStatsImpl object here. All requests for
* getStatistics(), getStatistic() & getStatisticNames() are
* delegated to this instance of GenericStatsImpl.
*/
public JVMStatsImpl() {
initTime = System.currentTimeMillis();
try {
baseStatsImpl = new GenericStatsImpl(STATS_INTERFACE_NAME, this);
}catch(ClassNotFoundException cnfe){
// TODO: Handle ClassNotFoundException
}
// Initialize a MutableCountStatistic
CountStatistic u = new CountStatisticImpl(
sm.getString("jvmstats.jvm_uptime"),
sm.getString("jvmstats.milli_seconds"),
sm.getString("jvmstats.jvm_uptime_desc") );
uptime = new MutableCountStatisticImpl(u);
// Initialize a MutableBoundedRangeStatistic
long upper = Runtime.getRuntime().maxMemory();
BoundedRangeStatistic h = new BoundedRangeStatisticImpl(
sm.getString("jvmstats.jvm_heapsize"),
sm.getString("jvmstats.bytes"),
sm.getString("jvmstats.jvm_heapsize_desc"),
0, upper, 0);
heapSize = new MutableBoundedRangeStatisticImpl(h);
}
/**
* Method to query the size of the JVM's heap
* @return BoundedRangeStatistic
*/
public BoundedRangeStatistic getHeapSize() {
long heap = Runtime.getRuntime().totalMemory();
heapSize.setCount(heap);
return (BoundedRangeStatistic) heapSize.unmodifiableView();
}
/**
* Method to query the amount of time that the JVM has been running
* @return CountStatistic
*/
public CountStatistic getUpTime() {
long curTime = System.currentTimeMillis();
long upTime = curTime - initTime;
uptime.setCount(upTime);
return (CountStatistic) uptime.unmodifiableView();
}
/**
* This method can be used to retrieve all the Statistics, exposed
* by this implementation of Stats
* @return Statistic[]
*/
public Statistic[] getStatistics() {
return baseStatsImpl.getStatistics();
}
/**
* queries for a Statistic by name.
* @return Statistic
*/
public Statistic getStatistic(String str) {
return baseStatsImpl.getStatistic(str);
}
/**
* returns an array of names of all the Statistics, that can be
* retrieved from this implementation of Stats
* @return String[]
*/
public String[] getStatisticNames() {
return baseStatsImpl.getStatisticNames();
}
}