/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.varia.stats;
import org.jboss.ejb.plugins.cmp.jdbc2.schema.Cache;
import org.jboss.logging.Logger;
import org.jboss.system.ServiceMBeanSupport;
import javax.management.ObjectName;
/**
* @jmx:mbean extends="org.jboss.system.ServiceMBean"
*
* @author <a href="mailto:alex@jboss.org">Alexey Loubyansky</a>
* @version <tt>$Revision: 81038 $</tt>
*/
public class CacheListener
extends ServiceMBeanSupport
implements Cache.Listener, CacheListenerMBean
{
private static final Logger log = Logger.getLogger(CacheListener.class);
private ObjectName statsCollector;
private ObjectName cacheName;
private String tableName;
/**
* @jmx.managed-attribute
*/
public ObjectName getStatsCollector()
{
return statsCollector;
}
/**
* @jmx.managed-attribute
*/
public void setStatsCollector(ObjectName statsCollector)
{
this.statsCollector = statsCollector;
}
/**
* @jmx.managed-attribute
*/
public ObjectName getCacheName()
{
return cacheName;
}
/**
* @jmx.managed-attribute
*/
public void setCacheName(ObjectName cacheName)
{
this.cacheName = cacheName;
}
public void startService() throws Exception
{
tableName = cacheName.getKeyProperty("table");
getServer().invoke(cacheName, "registerListener", new Object[]{this}, new String[]{Cache.Listener.class.getName()});
}
// Cache.Listener implementation
public void contention(int partitionIndex, long time)
{
try
{
StatisticalItem item = new ContentionStats(tableName, partitionIndex, time);
server.invoke(statsCollector, "addStatisticalItem",
new Object[]{item},
new String[]{StatisticalItem.class.getName()});
}
catch(Exception e)
{
log.error("Failed to add invocation.", e);
}
}
public void eviction(int partitionIndex, Object pk, int size)
{
try
{
StatisticalItem item = new EvictionStats(tableName, partitionIndex, pk);
server.invoke(statsCollector, "addStatisticalItem",
new Object[]{item},
new String[]{StatisticalItem.class.getName()});
}
catch(Exception e)
{
log.error("Failed to add invocation.", e);
}
}
public void hit(int partitionIndex)
{
try
{
StatisticalItem item = new HitStats(tableName, partitionIndex);
server.invoke(statsCollector, "addStatisticalItem",
new Object[]{item},
new String[]{StatisticalItem.class.getName()});
}
catch(Exception e)
{
log.error("Failed to add invocation.", e);
}
}
public void miss(int partitionIndex)
{
try
{
StatisticalItem item = new MissStats(tableName, partitionIndex);
server.invoke(statsCollector, "addStatisticalItem",
new Object[]{item},
new String[]{StatisticalItem.class.getName()});
}
catch(Exception e)
{
log.error("Failed to add invocation.", e);
}
}
public static class HitStats extends AbstractStatisticalItem
{
public static final String NAME = "Cache Hits Per Transaction";
private final String tableName;
private final int partitionIndex;
public HitStats(String name, int partitionIndex)
{
super(NAME);
value = name + partitionIndex;
this.tableName = name;
this.partitionIndex = partitionIndex;
}
public String getTableName()
{
return tableName;
}
public int getPartitionIndex()
{
return partitionIndex;
}
}
public static class MissStats extends AbstractStatisticalItem
{
public static final String NAME = "Cache Misses Per Transaction";
public MissStats(String name, int partitionIndex)
{
super(NAME);
value = name;
}
}
public static class ContentionStats extends AbstractStatisticalItem
{
public static final String NAME = "Cache Contention Statistics Per Transaction";
private long maxContentionTime;
private long contentionTimeTotal;
public ContentionStats(String name, int partitionIndex, long ms)
{
super(NAME);
value = name;
contentionTimeTotal = maxContentionTime = ms;
}
public void merge(StatisticalItem item)
{
super.merge(item);
ContentionStats cs = (ContentionStats)item;
if(cs.maxContentionTime > maxContentionTime)
{
maxContentionTime = cs.maxContentionTime;
}
contentionTimeTotal += cs.contentionTimeTotal;
}
public long getContentionTimeTotal()
{
return contentionTimeTotal;
}
public long getMaxContentionTime()
{
return maxContentionTime;
}
}
public static class EvictionStats extends AbstractStatisticalItem
{
public static final String NAME = "Cache Eviction Statistics Per Transaction";
private final String tableName;
private final Object pk;
public EvictionStats(String tableName, int partitionIndex, Object pk)
{
super(NAME);
value = tableName;
this.tableName = tableName;
this.pk = pk;
}
public String getTableName()
{
return tableName;
}
public Object getPk()
{
return pk;
}
}
}