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package com.sun.enterprise.web.stats;
import java.util.ArrayList;
import java.util.logging.Logger;
import java.util.logging.Level;
import java.text.MessageFormat;
import javax.management.ObjectName;
import javax.management.MBeanServerFactory;
import javax.management.MBeanServer;
import javax.management.j2ee.statistics.CountStatistic;
import javax.management.j2ee.statistics.Statistic;
import com.sun.logging.LogDomains;
import com.sun.enterprise.admin.monitor.stats.StringStatistic;
import com.sun.enterprise.admin.monitor.stats.StringStatisticImpl;
import com.sun.enterprise.admin.monitor.stats.PWCThreadPoolStats;
import com.sun.enterprise.admin.monitor.stats.MutableCountStatistic;
import com.sun.enterprise.admin.monitor.stats.MutableCountStatisticImpl;
import com.sun.enterprise.admin.monitor.stats.GenericStatsImpl;
import com.sun.enterprise.admin.monitor.stats.CountStatisticImpl;
/**
* @author Jan Luehe
*/
public final class PWCThreadPoolStatsImpl implements PWCThreadPoolStats {
private static final Logger _logger
= LogDomains.getLogger(LogDomains.WEB_LOGGER);
private GenericStatsImpl baseStatsImpl;
private MBeanServer server;
private ObjectName threadPoolName;
private StringStatistic id;
private MutableCountStatistic countThreadsIdle;
private MutableCountStatistic countThreads;
private MutableCountStatistic maxThreads;
private MutableCountStatistic countQueued;
private MutableCountStatistic peakQueued;
private MutableCountStatistic maxQueued;
public PWCThreadPoolStatsImpl(String domain) {
baseStatsImpl = new GenericStatsImpl(
com.sun.enterprise.admin.monitor.stats.PWCThreadPoolStats.class,
this);
// get an instance of the MBeanServer
ArrayList servers = MBeanServerFactory.findMBeanServer(null);
if(!servers.isEmpty())
server = (MBeanServer)servers.get(0);
else
server = MBeanServerFactory.createMBeanServer();
String objNameStr = domain + ":type=Selector,*";
try {
threadPoolName = new ObjectName(objNameStr);
} catch (Throwable t) {
String msg = _logger.getResourceBundle().getString(
"webcontainer.objectNameCreationError");
msg = MessageFormat.format(msg, new Object[] { objNameStr });
_logger.log(Level.SEVERE, msg, t);
}
// initialize all the MutableStatistic Classes
initializeStatistics();
}
/**
* Gets the ID of the thread pool.
*
* @return ID of the thread pool
*/
public StringStatistic getId() {
return id;
}
/**
* Gets the number of threads that are currently idle.
*
* @return Number of currently idle threads
*/
public CountStatistic getCountThreadsIdle() {
countThreadsIdle.setCount(
StatsUtil.getAggregateStatistic(server, threadPoolName,
"countThreadsIdleStats"));
return (CountStatistic)countThreadsIdle.unmodifiableView();
}
/**
* Gets the current number of threads.
*
* @return Current number of threads
*/
public CountStatistic getCountThreads() {
countThreads.setCount(
StatsUtil.getAggregateStatistic(server, threadPoolName,
"countThreadsStats"));
return (CountStatistic)countThreads.unmodifiableView();
}
/**
* Gets the maximum number of threads allowed in the thread pool.
*
* @return Maximum number of threads allowed in the thread pool
*/
public CountStatistic getMaxThreads() {
maxThreads.setCount(StatsUtil.getAggregateStatistic(server,
threadPoolName,
"maxThreadsStats"));
return (CountStatistic)maxThreads.unmodifiableView();
}
/**
* Gets the current number of requests waiting for a thread.
*
* @return Number of requests waiting for a thread
*/
public CountStatistic getCountQueued() {
return null;
}
/**
* Gets the largest number of requests that were ever queued up
* simultaneously for the use of a thread since the server was started.
*
* @return Largest number of requests that were ever queued up waiting
* for a thread
*/
public CountStatistic getPeakQueued() {
return null;
}
/**
* Gets the maximum number of requests that may be queued up
*
* @return Maximum number of requests that may be queued up
*/
public CountStatistic getMaxQueued() {
return null;
}
/**
* 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 with the given name.
*
* @name Name of the statistic to query for
*
* @return Statistic for the given name
*/
public Statistic getStatistic(String name) {
return baseStatsImpl.getStatistic(name);
}
/**
* Gets array of all statistic names exposed by this implementation of
* <codeStats</code>
*
* @return Array of statistic names
*/
public String[] getStatisticNames() {
return baseStatsImpl.getStatisticNames();
}
private void initializeStatistics() {
long startTime = System.currentTimeMillis();
id = new StringStatisticImpl("",
"id",
"String",
"ID of the thread pool",
startTime,
startTime);
CountStatistic c = new CountStatisticImpl("CountThreadsIdle");
countThreadsIdle = new MutableCountStatisticImpl(c);
c = new CountStatisticImpl("CountThreads");
countThreads = new MutableCountStatisticImpl(c);
c = new CountStatisticImpl("MaxThreads");
maxThreads = new MutableCountStatisticImpl(c);
c = new CountStatisticImpl("CountQueued");
countQueued = new MutableCountStatisticImpl(c);
c = new CountStatisticImpl("PeakQueued");
peakQueued = new MutableCountStatisticImpl(c);
c = new CountStatisticImpl("MaxQueued");
maxQueued = new MutableCountStatisticImpl(c);
}
}
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