package org.sim0mq.demo.mm1;
   
   import java.rmi.RemoteException;
   
   import nl.tudelft.simulation.dsol.DSOLModel;
   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.simtime.SimTimeDouble;
  import nl.tudelft.simulation.dsol.simtime.dist.DistContinuousSimTime;
  import nl.tudelft.simulation.dsol.simtime.dist.DistContinuousTime;
  import nl.tudelft.simulation.dsol.simulators.DEVSSimulatorInterface;
  import nl.tudelft.simulation.dsol.simulators.SimulatorInterface;
  import nl.tudelft.simulation.dsol.statistics.Tally;
  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 implements DSOLModel.TimeDouble
  {
      /** The default serial version UID for serializable classes. */
      private static final long serialVersionUID = 1L;
  
      /** the simulator. */
      private DEVSSimulatorInterface.TimeDouble devsSimulator;
  
      /** tally dN. */
      @SuppressWarnings("checkstyle:visibilitymodifier")
      Tally<Double, Double, SimTimeDouble> dN;
  
      /** tally qN. */
      @SuppressWarnings("checkstyle:visibilitymodifier")
      Tally<Double, Double, SimTimeDouble> qN;
  
      /** utilization uN. */
      @SuppressWarnings("checkstyle:visibilitymodifier")
      Utilization uN;
  
      /** PARAMETER iat. */
      public double iat = Double.NaN;
  
      /** PARAMETER serviceTime. */
      public double serviceTime = Double.NaN;
      
      /** PARAMETER seed. */
      public long seed = 1;
      
  
      /** {@inheritDoc} */
      @Override
      public final void constructModel(final SimulatorInterface<Double, Double, SimTimeDouble> simulator)
              throws SimRuntimeException, RemoteException
      {
          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");
          }
  
          this.devsSimulator = (DEVSSimulatorInterface.TimeDouble) simulator;
          StreamInterface defaultStream = new MersenneTwister(this.seed);
  
          // The Generator
          Generator.TimeDouble generator = new Generator.TimeDouble(this.devsSimulator, Object.class, null);
          generator.setInterval(new DistContinuousTime.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<>(this.devsSimulator, 1.0);
  
          // created a resource
          StationInterface queue = new Seize.TimeDouble(this.devsSimulator, resource);
          StationInterface release = new Release.TimeDouble(this.devsSimulator, resource, 1.0);
  
          // The server
          DistContinuousTime.TimeDouble serviceTimeDistribution =
                  new DistContinuousTime.TimeDouble(new DistExponential(defaultStream, this.serviceTime));
          StationInterface server = new Delay.TimeDouble(this.devsSimulator, serviceTimeDistribution);
 
         // The flow
         generator.setDestination(queue);
         queue.setDestination(server);
         server.setDestination(release);
 
         // Statistics
         this.dN = new Tally<>("d(n)", this.devsSimulator, queue, Seize.DELAY_TIME);
         this.qN = new Tally<>("q(n)", this.devsSimulator, queue, Seize.QUEUE_LENGTH_EVENT);
         this.uN = new Utilization("u(n)", this.devsSimulator, server);
     }
 
     /** {@inheritDoc} */
     @Override
     public final SimulatorInterface.TimeDouble getSimulator()
     {
         return this.devsSimulator;
     }
 }