genericservicemonitor.java

jxta_src_2.41b jxta 2.41b 最新版源码 from www.jxta.org

/*
 * Copyright (c) 2001 Sun Microsystems, Inc.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *       Sun Microsystems, Inc. for Project JXTA."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact Project JXTA at http://www.jxta.org.
 *
 * 5. Products derived from this software may not be called "JXTA",
 *    nor may "JXTA" appear in their name, without prior written
 *    permission of Sun.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL SUN MICROSYSTEMS OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of Project JXTA.  For more
 * information on Project JXTA, please see
 * <http://www.jxta.org/>.
 *
 * This license is based on the BSD license adopted by the Apache Foundation.
 *
 * $Id: GenericServiceMonitor.java,v 1.4 2003/11/06 01:29:16 jice Exp $
 */

package net.jxta.impl.meter;

import net.jxta.meter.*;
import net.jxta.peergroup.*;
import net.jxta.exception.*;
import net.jxta.platform.*;
import net.jxta.protocol.*;
import net.jxta.document.*;
import net.jxta.id.*;
import java.util.*;

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

	protected long reportRate;
	protected int reportRateIndex;
	private Hashtable resolverHandlerMeters = new Hashtable();
	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) {
		boolean anyData = false;

		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() {}
}