MM1Queue41Model.java
package org.sim0mq.demo.mm1;
import java.rmi.RemoteException;
import nl.tudelft.simulation.dsol.SimRuntimeException;
import nl.tudelft.simulation.dsol.formalisms.Resource;
import nl.tudelft.simulation.dsol.formalisms.flow.Delay;
import nl.tudelft.simulation.dsol.formalisms.flow.Generator;
import nl.tudelft.simulation.dsol.formalisms.flow.Release;
import nl.tudelft.simulation.dsol.formalisms.flow.Seize;
import nl.tudelft.simulation.dsol.formalisms.flow.StationInterface;
import nl.tudelft.simulation.dsol.formalisms.flow.statistics.Utilization;
import nl.tudelft.simulation.dsol.model.AbstractDSOLModel;
import nl.tudelft.simulation.dsol.simtime.SimTimeDouble;
import nl.tudelft.simulation.dsol.simtime.dist.DistContinuousSimTime;
import nl.tudelft.simulation.dsol.simtime.dist.DistContinuousSimulationTime;
import nl.tudelft.simulation.dsol.simulators.DEVSSimulatorInterface;
import nl.tudelft.simulation.dsol.statistics.SimTally;
import nl.tudelft.simulation.jstats.distributions.DistConstant;
import nl.tudelft.simulation.jstats.distributions.DistDiscreteConstant;
import nl.tudelft.simulation.jstats.distributions.DistExponential;
import nl.tudelft.simulation.jstats.streams.MersenneTwister;
import nl.tudelft.simulation.jstats.streams.StreamInterface;
/**
* The M/M/1 example as published in Simulation Modeling and Analysis by A.M. Law & W.D. Kelton section 1.4 and 2.4.
* <p>
* (c) copyright 2002-2016 <a href="http://www.simulation.tudelft.nl">Delft University of Technology </a>, the Netherlands. <br>
* See for project information <a href="http://www.simulation.tudelft.nl">www.simulation.tudelft.nl </a> <br>
* License of use: <a href="http://www.gnu.org/copyleft/lesser.html">Lesser General Public License (LGPL) </a>, no warranty.
* @version 2.0 21.09.2003 <br>
* @author <a href="https://www.linkedin.com/in/peterhmjacobs">Peter Jacobs </a>
*/
public class MM1Queue41Model extends AbstractDSOLModel.TimeDouble<DEVSSimulatorInterface.TimeDouble>
{
/** The default serial version UID for serializable classes. */
private static final long serialVersionUID = 1L;
/** tally dN. */
@SuppressWarnings("checkstyle:visibilitymodifier")
SimTally.TimeDouble dN;
/** tally qN. */
@SuppressWarnings("checkstyle:visibilitymodifier")
SimTally.TimeDouble qN;
/** utilization uN. */
@SuppressWarnings("checkstyle:visibilitymodifier")
Utilization<Double, Double, SimTimeDouble> uN;
/** PARAMETER iat. */
@SuppressWarnings("checkstyle:visibilitymodifier")
public double iat = Double.NaN;
/** PARAMETER serviceTime. */
@SuppressWarnings("checkstyle:visibilitymodifier")
public double serviceTime = Double.NaN;
/** PARAMETER seed. */
@SuppressWarnings("checkstyle:visibilitymodifier")
public long seed = 1;
/**
* Construct the model.
* @param simulator the simulator
*/
public MM1Queue41Model(final DEVSSimulatorInterface.TimeDouble simulator)
{
super(simulator);
}
/** {@inheritDoc} */
@Override
public final void constructModel() throws SimRuntimeException
{
if (Double.isNaN(this.iat))
{
throw new SimRuntimeException("Parameter iat not defined for model");
}
if (Double.isNaN(this.serviceTime))
{
throw new SimRuntimeException("Parameter servicetime not defined for model");
}
StreamInterface defaultStream = new MersenneTwister(this.seed);
// The Generator
Generator.TimeDouble generator = new Generator.TimeDouble(getSimulator(), Object.class, null);
generator.setInterval(new DistContinuousSimulationTime.TimeDouble(new DistExponential(defaultStream, this.iat)));
generator.setStartTime(new DistContinuousSimTime.TimeDouble(new DistConstant(defaultStream, 0.0)));
generator.setBatchSize(new DistDiscreteConstant(defaultStream, 1));
generator.setMaxNumber(1000);
// The queue, the resource and the release
Resource<Double, Double, SimTimeDouble> resource = new Resource<>(getSimulator(), 1.0);
// created a resource
StationInterface.TimeDouble queue = new Seize.TimeDouble(getSimulator(), resource);
StationInterface.TimeDouble release = new Release.TimeDouble(getSimulator(), resource, 1.0);
// The server
DistContinuousSimulationTime.TimeDouble serviceTimeDistribution =
new DistContinuousSimulationTime.TimeDouble(new DistExponential(defaultStream, this.serviceTime));
StationInterface.TimeDouble server = new Delay.TimeDouble(getSimulator(), serviceTimeDistribution);
// The flow
generator.setDestination(queue);
queue.setDestination(server);
server.setDestination(release);
// Statistics
try
{
this.dN = new SimTally.TimeDouble("d(n)", getSimulator(), queue, Seize.DELAY_TIME);
this.qN = new SimTally.TimeDouble("q(n)", getSimulator(), queue, Seize.QUEUE_LENGTH_EVENT);
this.uN = new Utilization<Double, Double, SimTimeDouble>("u(n)", getSimulator(), server);
}
catch (RemoteException exception)
{
exception.printStackTrace();
}
}
}