net.jxta.impl.meter.GenericServiceMonitor Maven / Gradle / Ivy

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 * Copyright (c) 2001-2007 Sun Microsystems, Inc.  All rights reserved.
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 *  The Sun Project JXTA(TM) Software License
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 *  modification, are permitted provided that the following conditions are met:
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 *     this list of conditions and the following disclaimer.
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 *     developed by Sun Microsystems, Inc. for JXTA(TM) technology." 
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 *   for instructions on use of 
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 *  ====================================================================
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 *  This software consists of voluntary contributions made by many individuals 
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 *  http://www.jxta.org.
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 *  This license is based on the BSD license adopted by the Apache Foundation. 
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package net.jxta.impl.meter;


import net.jxta.document.Advertisement;
import net.jxta.exception.JxtaException;
import net.jxta.id.ID;
import net.jxta.meter.MonitorResources;
import net.jxta.meter.ServiceMetric;
import net.jxta.meter.ServiceMonitorFilter;
import net.jxta.peergroup.PeerGroup;
import net.jxta.platform.Module;
import net.jxta.platform.ModuleClassID;
import net.jxta.protocol.ModuleImplAdvertisement;


public abstract class GenericServiceMonitor implements ServiceMonitorImpl, Module {
    private ModuleClassID moduleClassID;
    protected MonitorManager monitorManager;

    protected long reportRate;
    protected int reportRateIndex;
    protected ServiceMetric cumulativeServiceMetric;
    protected ServiceMetric deltaServiceMetrics[];
    protected ModuleImplAdvertisement implAdvertisement;

    public GenericServiceMonitor() {}

    // public void init(MonitorManager monitorManager, ModuleClassID moduleClassID) {

    public void init(PeerGroup group, ID assignedID, Advertisement advertisement) {
        group.unref(); // We do not use the group. These are not quite real modules.
        this.implAdvertisement = (ModuleImplAdvertisement) advertisement;
        this.moduleClassID = (ModuleClassID) assignedID;
    }

    public void init(MonitorManager monitorManager) {
        this.monitorManager = monitorManager;

        if (MeterBuildSettings.METERING) {
            cumulativeServiceMetric = createServiceMetric();
            deltaServiceMetrics = new ServiceMetric[monitorManager.getReportRatesCount()];
            init();
        }
    }

    /*
     public void init(MonitorManager monitorManager) {
     this.monitorManager = monitorManager;
     }
     */

    public int startApp(java.lang.String[] args) {
        return 0;
    } // fix-me: what's the right return?

    public void stopApp() {}

    protected void init() {}

    public ModuleClassID getModuleClassID() {
        return moduleClassID;
    }

    public PeerGroup getPeerGroup() {
        return monitorManager.getPeerGroup();
    }

    protected ServiceMetric getCumulativeServiceMetric() {
        return cumulativeServiceMetric;
    }

    public void resetPulseRate(ServiceMonitorPulseInfo pulseInfo, int oldPulseRateIndex) {
        this.reportRate = pulseInfo.getPulseRate();
        this.reportRateIndex = pulseInfo.getPulseRateIndex();
    }

    public void validateCumulativeServiceMonitorFilter(ServiceMonitorFilter serviceMonitorFilter) {// base implementation is to accept
    }

    public ServiceMonitorFilter createSupportedCumulativeServiceMonitorFilter(ServiceMonitorFilter serviceMonitorFilter) {
        // base implementation is to accept
        return serviceMonitorFilter;
    }

    public void validateServiceMonitorFilter(ServiceMonitorFilter serviceMonitorFilter, long reportRate) {// base implementation is to accept
    }

    public ServiceMonitorFilter createSupportedServiceMonitorFilter(ServiceMonitorFilter serviceMonitorFilter, long reportRate) {
        // base implementation is to accept
        return serviceMonitorFilter;
    }

    protected ServiceMetric createServiceMetric() {
        try {
            return MonitorResources.createServiceMetric(moduleClassID);
        } catch (JxtaException e) { // this will always succeed since we were able to lad the monitor
            return null;
        }
    }

    /**
     * Get the service metrics accrued since the last pulse
     *
     * @return null if there were no metrices since the last call
     */
    protected abstract ServiceMetric collectServiceMetrics();

    public synchronized void beginPulse(ServiceMonitorPulseInfo pulseInfo) {
        ServiceMetric baseDeltaServiceMetric = collectServiceMetrics();

        deltaServiceMetrics[reportRateIndex] = baseDeltaServiceMetric;

        if (baseDeltaServiceMetric != null) {
            for (int reportRate = reportRateIndex + 1; reportRate < deltaServiceMetrics.length; reportRate++) {

                if (pulseInfo.isRegisteredFilterForRate(reportRate)) {

                    if (deltaServiceMetrics[reportRate] == null) {
                        deltaServiceMetrics[reportRate] = createServiceMetric();
                    }

                    deltaServiceMetrics[reportRate].mergeMetrics(baseDeltaServiceMetric);
                }
            }
        }
    }

    public void endPulse(ServiceMonitorPulseInfo pulseInfo) {
        for (int reportRateIndex = 0; reportRateIndex < monitorManager.getReportRatesCount(); reportRateIndex++) {
            if (pulseInfo.isEvenPulseForRateIndex(reportRateIndex)) {
                deltaServiceMetrics[reportRateIndex] = null;
            }
        }
    }

    public void beginCumulativeReport() {}

    public void endCumulativeReport() {}

    public ServiceMetric getServiceMetric(ServiceMonitorFilter serviceMonitorFilter, long fromTime, long toTime, int reportIndex, long reportRate) {
        int deltaReportRateIndex = monitorManager.getReportRateIndex(reportRate);

        // Fix-Me: For now we are not yet  supporting filters

        return deltaServiceMetrics[deltaReportRateIndex];
    }

    public ServiceMetric getCumulativeServiceMetric(ServiceMonitorFilter serviceMonitorFilter, long fromTime, long toTime) {
        // Fix-Me: For now we are not yet  supporting filters

        return cumulativeServiceMetric;
    }

    public void serviceMonitorFilterRegistered(ServiceMonitorFilter serviceMonitorFilter, int reportRateIndex, long reportRate, boolean newRate) {
        if (newRate) {
            deltaServiceMetrics[reportRateIndex] = createServiceMetric();
        }
    }

    public void serviceMonitorFilterDeregistered(ServiceMonitorFilter serviceMonitorFilter, int reportRateIndex, long reportRate, boolean retiredRate) {
        if (retiredRate) {
            deltaServiceMetrics[reportRateIndex] = null;
        }
    }

    public void destroy() {}
}