Glassfish example source code file (RequestStatsProvider.java)

This example Glassfish source code file (RequestStatsProvider.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

countstatistic, countstatisticimpl, countstatisticimpl, description, log, logging, managedattribute, probeparam, probeparam, processing_time_description, response, string, string, timestatdata, timestatdata, tm

The Glassfish RequestStatsProvider.java source code

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 *
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 *
 * 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
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
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 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
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 * and therefore, elected the GPL Version 2 license, then the option applies
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 */

package org.glassfish.web.admin.monitor;

import java.util.logging.Level;
import java.util.logging.Logger;
import com.sun.logging.LogDomains;
import org.glassfish.external.statistics.CountStatistic;
import org.glassfish.external.statistics.annotations.Reset;
import org.glassfish.external.statistics.impl.CountStatisticImpl;
import org.glassfish.external.statistics.impl.StatisticImpl;
import org.glassfish.external.statistics.impl.TimeStatisticImpl;
import org.glassfish.external.probe.provider.annotations.*;
import org.glassfish.gmbal.AMXMetadata;
import org.glassfish.gmbal.Description;
import org.glassfish.gmbal.ManagedObject;
import org.glassfish.gmbal.ManagedAttribute;

/**
 * Provides the monitoring data at the Web container level
 *
 * @author Prashanth Abbagani
 */
@AMXMetadata(type="web-request-mon", group="monitoring")
@ManagedObject
@Description("Web Request Statistics")
public class RequestStatsProvider {

    private static final Logger logger = LogDomains.getLogger(
        RequestStatsProvider.class, LogDomains.WEB_LOGGER);

    private static final String ERROR_COUNT_DESCRIPTION =
        "Cumulative value of the error count, with error count representing the number of cases where the response code was greater than or equal to 400";
    private static final String REQUEST_COUNT_DESCRIPTION =
        "Cumulative number of requests processed so far";
    private static final String MAX_TIME_DESCRIPTION =
        "Longest response time for a request; not a cumulative value, but the largest response time from among the response times";
    private static final String PROCESSING_TIME_DESCRIPTION = 
        "Average request processing time";

    private CountStatisticImpl errorCount = new CountStatisticImpl("ErrorCount",
            StatisticImpl.UNIT_COUNT, ERROR_COUNT_DESCRIPTION);
    private CountStatisticImpl requestCount = new CountStatisticImpl("RequestCount",
            StatisticImpl.UNIT_COUNT, REQUEST_COUNT_DESCRIPTION);
    private CountStatisticImpl maxTime = new CountStatisticImpl("MaxTime",
            StatisticImpl.UNIT_MILLISECOND, MAX_TIME_DESCRIPTION);
    private CountStatisticImpl processingTime = new CountStatisticImpl("ProcessingTime",
            StatisticImpl.UNIT_MILLISECOND, PROCESSING_TIME_DESCRIPTION);

    private TimeStatisticImpl requestProcessTime = new TimeStatisticImpl(0L, 0L, 0L, 0L,
            "", "", "", System.currentTimeMillis(), -1L);
    
    private String virtualServerName = null;
    private String moduleName = null;

    private ThreadLocal<TimeStatData> timeStatDataLocal = new ThreadLocal (){
        TimeStatData tsd;

        protected TimeStatData initialValue (){
            tsd = new TimeStatData ();
            return tsd;
        }
        public TimeStatData get (){
            if (tsd == null) {
                tsd = new TimeStatData();
            }
            return tsd;
        }
    };

    public RequestStatsProvider(String appName, String vsName) {
        this.virtualServerName = vsName;
        this.moduleName = appName;
    }

    @ManagedAttribute(id="errorcount")
    @Description(ERROR_COUNT_DESCRIPTION)
    public CountStatistic getErrorCount() {
        return errorCount;
    }

    @ManagedAttribute(id="requestcount")
    @Description(REQUEST_COUNT_DESCRIPTION)
    public CountStatistic getRequestCount() {
        requestCount.setCount(requestProcessTime.getCount());
        return requestCount;
    }

    @ManagedAttribute(id="maxtime")
    @Description(MAX_TIME_DESCRIPTION)
    public CountStatistic getMaxTime() {
        maxTime.setCount(requestProcessTime.getMaxTime());
        return maxTime;
    }

    @ManagedAttribute(id="processingtime")
    @Description(PROCESSING_TIME_DESCRIPTION)
    public CountStatistic getProcessingTime() {
        long count = requestProcessTime.getCount();
        long processTime = 0L;
        if (count != 0) {
            processTime = requestProcessTime.getTotalTime()/count;
        }
        processingTime.setCount(processTime);
        return processingTime;
    }

    @ProbeListener("glassfish:web:http-service:requestStartEvent")
    public void requestStartEvent(
            @ProbeParam("appName") String appName,
            @ProbeParam("hostName") String hostName,
            @ProbeParam("serverName") String serverName,
            @ProbeParam("serverPort") int serverPort,
            @ProbeParam("contextPath") String contextPath,
            @ProbeParam("servletPath") String servletPath) {
        if (logger.isLoggable(Level.FINEST)) {
            logger.finest(
                "[TM]requestStartEvent Unprocessed received - virtual-server = " +
                serverName + ":" + serverPort + 
                ": application = " + contextPath +
                " : servlet = " + servletPath +
                " : Expecting (vsName, appName) = (" +
                virtualServerName + ", " + moduleName + ")");
        }
        if ((virtualServerName != null) && (moduleName != null)) {
            //String vs = WebTelemetryBootstrap.getVirtualServerName(
            //    hostName, String.valueOf(request.getServerPort()));
            if ((appName != null && hostName != null) &&
                    hostName.equals(virtualServerName) &&
                    appName.equals(moduleName)){
                //increment counts
                timeStatDataLocal.get().setEntryTime(System.currentTimeMillis());
                if (logger.isLoggable(Level.FINEST)) {
                    logger.finest(
                        "[TM]requestStartEvent resolved - virtual-server = " +
                        serverName + ": application = " +
                        contextPath + " :appName = " + appName +
                        " : servlet = " + servletPath + " : port = " +
                        serverPort);
                }
            }
        } else {
            timeStatDataLocal.get().setEntryTime(System.currentTimeMillis());
            if (logger.isLoggable(Level.FINEST)) {
                logger.finest(
                    "[TM]requestStartEvent resolved - virtual-server = " +
                    serverName + ": application = " + contextPath +
                    " : servlet = " + servletPath);
            }
        }
    }

    @ProbeListener("glassfish:web:http-service:requestEndEvent")
    public void requestEndEvent(
            @ProbeParam("appName") String appName,
            @ProbeParam("hostName") String hostName,
            @ProbeParam("serverName") String serverName,
            @ProbeParam("serverPort") int serverPort,
            @ProbeParam("contextPath") String contextPath,
            @ProbeParam("servletPath") String servletPath,
            @ProbeParam("statusCode") int statusCode) {
        if (logger.isLoggable(Level.FINEST)) {
            logger.finest(
                "[TM]requestEndEvent Unprocessed received - virtual-server = " +
                serverName + ": application = " +
                contextPath + " : servlet = " +
                servletPath + " :Response code = " +
                statusCode + " : Expecting (vsName, appName) = (" +
                virtualServerName + ", " + moduleName + ")");
        }
        if ((virtualServerName != null) && (moduleName != null)) {
            //String vs = WebTelemetryBootstrap.getVirtualServerName(
            //    hostName, String.valueOf(request.getServerPort()));
            if ((appName != null && hostName != null) &&
                    hostName.equals(virtualServerName) &&
                    appName.equals(moduleName)){
                //increment counts
                TimeStatData tsd = timeStatDataLocal.get();
                tsd.setExitTime(System.currentTimeMillis());
                requestProcessTime.incrementCount(tsd.getTotalTime());

                if (statusCode >= 400) {
                    errorCount.increment();
                }
                if (logger.isLoggable(Level.FINEST)) {
                    logger.finest(
                        "[TM]requestEndEvent resolved - virtual-server = " +
                        serverName + ": application = " + contextPath +
                        " :appName = " + appName +
                        " : servlet = " + servletPath +
                        " : port = " + serverPort +
                        " :Response code = " + statusCode);
                }
            }
        } else {
            TimeStatData tsd = timeStatDataLocal.get();
            tsd.setExitTime(System.currentTimeMillis());
            requestProcessTime.incrementCount(tsd.getTotalTime());

            if (statusCode >= 400) {
                errorCount.increment();
            }
            if (logger.isLoggable(Level.FINEST)) {
                logger.finest(
                    "[TM]requestEndEvent resolved - virtual-server = " +
                    serverName + ": application = " +
                    contextPath + " : servlet = " +
                    servletPath + " : port = " +
                    serverPort  + " :Response code = " +
                    statusCode);
            }
        }
    }

    
    public long getProcessTime() {
        return requestProcessTime.getTotalTime()/requestProcessTime.getCount();
    }

    public String getModuleName() {
        return moduleName;
    }
    
    public String getVSName() {
        return virtualServerName;
    }

    @Reset
    public void reset() {
        this.requestProcessTime.reset();
        this.errorCount.reset();
        this.maxTime.reset();
        this.processingTime.reset();
        this.requestCount.reset();
    }

}