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A reactive Java web server.
/*
* Copyright (c) 1998-2015 Caucho Technology -- all rights reserved
*
* This file is part of Baratine(TM)(TM)
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Baratine is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Baratine is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Baratine; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*/
package com.caucho.v5.util;
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryUsage;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.logging.Logger;
import javax.management.JMException;
import javax.management.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.openmbean.CompositeData;
public class MemoryPoolAdapter
{
private static final Logger log
= Logger.getLogger(MemoryPoolAdapter.class.getName());
private final MBeanServer _mbeanServer;
private final ObjectName []_gcObjectNames;
private Map _poolNamesMap =
new HashMap();
private List _gcBeans;
public MemoryPoolAdapter()
{
_mbeanServer = JmxUtil.getMBeanServer();
try {
ObjectName query = new ObjectName("java.lang:type=MemoryPool,*");
Set objectNames = _mbeanServer.queryNames(query, null);
for (PoolType poolType : PoolType.values()) {
ObjectName objectName = poolType.find(objectNames);
_poolNamesMap.put(poolType, objectName);
}
} catch (Exception e) {
throw new IllegalStateException(e);
}
try {
_gcBeans = ManagementFactory.getGarbageCollectorMXBeans();
/*
System.out.println("GC: " + gcMXBean);
System.out.println(" GC-count: " + gcMXBean.getCollectionCount());
System.out.println(" GC-time: " + gcMXBean.getCollectionTime());
*/
ObjectName query = new ObjectName("java.lang:type=GarbageCollector,*");
Set objectNames = _mbeanServer.queryNames(query, null);
_gcObjectNames = new ObjectName[objectNames.size()];
int i = 0;
for (ObjectName name : objectNames) {
_gcObjectNames[i++] = name;
}
} catch (Exception e) {
throw new IllegalStateException(e);
}
}
public ObjectName getCodeCacheName()
{
return _poolNamesMap.get(PoolType.CODE_CACHE);
}
public void setCodeCacheName(ObjectName codeCacheName)
{
_poolNamesMap.put(PoolType.CODE_CACHE, codeCacheName);
}
public ObjectName getEdenName()
{
return _poolNamesMap.get(PoolType.EDEN);
}
public void setEdenName(ObjectName edenName)
{
_poolNamesMap.put(PoolType.EDEN, edenName);
}
public ObjectName getSurvivorName()
{
return _poolNamesMap.get(PoolType.SURVIVOR);
}
public void setSurvivorName(ObjectName survivorName)
{
_poolNamesMap.put(PoolType.SURVIVOR, survivorName);
}
public ObjectName getTenuredName()
{
return _poolNamesMap.get(PoolType.TENURED);
}
public void setTenuredName(ObjectName tenuredName)
{
_poolNamesMap.put(PoolType.TENURED, tenuredName);
}
public long getCodeCacheCommitted()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getCodeCacheName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getCommitted();
}
public long getCodeCacheMax()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getCodeCacheName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getMax();
}
public long getCodeCacheUsed()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getCodeCacheName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getUsed();
}
public long getCodeCacheFree()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getCodeCacheName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getMax() - usage.getUsed();
}
public long getEdenCommitted()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getEdenName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getCommitted();
}
public long getEdenMax()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getEdenName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getMax();
}
public long getEdenUsed()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getEdenName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getUsed();
}
public long getEdenFree()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getEdenName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getMax() - usage.getUsed();
}
public long getSurvivorCommitted()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getSurvivorName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getCommitted();
}
public long getSurvivorMax()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getSurvivorName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getMax();
}
public long getSurvivorUsed()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getSurvivorName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getUsed();
}
public long getSurvivorFree()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getSurvivorName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getMax() - usage.getUsed();
}
public long getTenuredCommitted()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getTenuredName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getCommitted();
}
public long getTenuredMax()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getTenuredName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getMax();
}
public long getTenuredUsed()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getTenuredName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getUsed();
}
public long getTenuredFree()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getTenuredName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return usage.getMax() - usage.getUsed();
}
public MemUsage getTenuredMemUsage()
throws JMException
{
CompositeData data
= (CompositeData) _mbeanServer.getAttribute(getTenuredName(), "Usage");
MemoryUsage usage = MemoryUsage.from(data);
return new MemUsage(usage.getMax(),
usage.getCommitted(),
usage.getUsed());
}
public long getGarbageCollectionTime()
throws JMException
{
long gcTime = 0;
for (GarbageCollectorMXBean gcBean : _gcBeans) {
gcTime += gcBean.getCollectionTime();
}
return gcTime;
}
public long getGarbageCollectionCount()
throws JMException
{
long gcCount = 0;
for (GarbageCollectorMXBean gcBean : _gcBeans) {
gcCount += gcBean.getCollectionCount();
}
return gcCount;
}
public static class MemUsage
{
private long _max;
private long _used;
protected MemUsage(long max,
long committed,
long used)
{
if (max < committed)
_max = committed;
else
_max = max;
_used = used;
}
public long getMax()
{
return _max;
}
public long getUsed()
{
return _used;
}
public long getFree()
{
return getMax() - getUsed();
}
}
public static enum PoolType
{
CODE_CACHE ("java.lang:type=MemoryPool,name=Code Cache",
"class storage","class memory","code cache","class","code"),
EDEN ("java.lang:type=MemoryPool,name=Eden Space",
"eden"),
SURVIVOR ("java.lang:type=MemoryPool,name=Survivor Space",
"survivor"),
TENURED ("java.lang:type=MemoryPool,name=Tenured Gen",
"tenured","old gen","java heap","old space","old","heap");
private final String _defaultName;
private final String[] _keywords;
PoolType(String defaultName, String... keywords)
{
_defaultName = defaultName;
_keywords = keywords;
}
public String defaultName()
{
return _defaultName;
}
public String[] keywords()
{
return _keywords;
}
// this does a breadth first search for the 1st objectName that matches a keyword
// keywords are ordered most specific to least specific
public ObjectName find(Set objectNames)
throws MalformedObjectNameException
{
for (String keyword : _keywords) {
for (ObjectName objectName : objectNames) {
String name = objectName.getKeyProperty("name").toLowerCase();
if (name.contains(keyword)) {
return objectName;
}
}
}
return new ObjectName(_defaultName);
}
}
}
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