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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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* language governing permissions and limitations under the License.
*
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* file and include the License file at packager/legal/LICENSE.txt.
*
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* exception as provided by Oracle in the GPL Version 2 section of the License
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*
* Modifications:
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*/
package org.glassfish.web.admin.monitor;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.glassfish.external.statistics.CountStatistic;
import org.glassfish.external.statistics.RangeStatistic;
import org.glassfish.external.statistics.impl.CountStatisticImpl;
import org.glassfish.external.statistics.impl.RangeStatisticImpl;
import org.glassfish.external.statistics.impl.StatisticImpl;
import org.glassfish.external.probe.provider.annotations.*;
import org.glassfish.gmbal.AMXMetadata;
import org.glassfish.gmbal.Description;
import org.glassfish.gmbal.ManagedAttribute;
import org.glassfish.gmbal.ManagedObject;
import org.glassfish.web.admin.LogFacade;
/**
* Provides the monitoring data at the Web container level
*
* @author Prashanth Abbagani
*/
@AMXMetadata(type="servlet-mon", group="monitoring")
@ManagedObject
@Description("Web Container Servlet Statistics")
public class ServletStatsProvider {
private static final Logger logger = LogFacade.getLogger();
private static final String ACTIVE_SERVLETS_LOADED_DESCRIPTION =
"Number of Servlets loaded";
private static final String TOTAL_SERVLETS_LOADED_DESCRIPTION =
"Total number of Servlets ever loaded";
private static final String SERVLET_PROCESSING_TIMES_DESCRIPTION =
"Cumulative Servlet processing times";
private String moduleName;
private String vsName;
private RangeStatisticImpl activeServletsLoadedCount;
private CountStatisticImpl totalServletsLoadedCount;
private CountStatisticImpl servletProcessingTimes;
public ServletStatsProvider(String moduleName, String vsName) {
this.moduleName = moduleName;
this.vsName = vsName;
long curTime = System.currentTimeMillis();
activeServletsLoadedCount = new RangeStatisticImpl(
0L, 0L, 0L, "ActiveServletsLoaded", StatisticImpl.UNIT_COUNT,
ACTIVE_SERVLETS_LOADED_DESCRIPTION, curTime, curTime);
totalServletsLoadedCount = new CountStatisticImpl(
"TotalServletsLoaded", StatisticImpl.UNIT_COUNT,
TOTAL_SERVLETS_LOADED_DESCRIPTION);
servletProcessingTimes = new CountStatisticImpl(
"ServletProcessingTimes", StatisticImpl.UNIT_MILLISECOND,
SERVLET_PROCESSING_TIMES_DESCRIPTION);
}
@ManagedAttribute(id="activeservletsloadedcount")
@Description(ACTIVE_SERVLETS_LOADED_DESCRIPTION)
public RangeStatistic getActiveServletsLoaded() {
return activeServletsLoadedCount;
}
@ManagedAttribute(id="totalservletsloadedcount")
@Description(TOTAL_SERVLETS_LOADED_DESCRIPTION)
public CountStatistic getTotalServletsLoaded() {
return totalServletsLoadedCount;
}
@ManagedAttribute(id="servletprocessingtimes")
@Description(SERVLET_PROCESSING_TIMES_DESCRIPTION)
public CountStatistic getServletProcessingTimes() {
return servletProcessingTimes;
}
@ProbeListener("glassfish:web:servlet:servletInitializedEvent")
public void servletInitializedEvent(
@ProbeParam("servletName") String servletName,
@ProbeParam("appName") String appName,
@ProbeParam("hostName") String hostName) {
if (logger.isLoggable(Level.FINEST)) {
logger.finest("Servlet Loaded event received - " +
"servletName = " + servletName +
": appName = " + appName + ": hostName = " +
hostName);
}
if (isValidEvent(appName, hostName)) {
synchronized (activeServletsLoadedCount) {
activeServletsLoadedCount.setCurrent(
activeServletsLoadedCount.getCurrent() + 1);
}
totalServletsLoadedCount.increment();
}
}
@ProbeListener("glassfish:web:servlet:servletDestroyedEvent")
public void servletDestroyedEvent(
@ProbeParam("servletName") String servletName,
@ProbeParam("appName") String appName,
@ProbeParam("hostName") String hostName) {
if (logger.isLoggable(Level.FINEST)) {
logger.finest("Servlet Destroyed event received - " +
"servletName = " + servletName +
": appName = " + appName + ": hostName = " +
hostName);
}
if (isValidEvent(appName, hostName)) {
synchronized (activeServletsLoadedCount) {
activeServletsLoadedCount.setCurrent(
activeServletsLoadedCount.getCurrent() - 1);
}
}
}
private boolean isValidEvent(String mName, String hostName) {
//Temp fix, get the appname from the context root
if ((moduleName == null) || (vsName == null)) {
return true;
}
if ((moduleName.equals(mName)) && (vsName.equals(hostName))) {
return true;
}
return false;
}
public String getModuleName() {
return moduleName;
}
public String getVSName() {
return vsName;
}
void addServletProcessingTime(long servletProcessingTime) {
servletProcessingTimes.increment(servletProcessingTime);
}
}