package org.sim0mq.demo.mm1;
   
   import java.io.Serializable;
   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 2015-2020 <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("generator", 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(), "resource", 1.0);
  
          // created a resource
          StationInterface.TimeDouble queue = new Seize.TimeDouble("queue", getSimulator(), resource);
         StationInterface.TimeDouble release = new Release.TimeDouble("release", getSimulator(), resource, 1.0);
 
         // The server
         DistContinuousSimulationTime.TimeDouble serviceTimeDistribution =
                 new DistContinuousSimulationTime.TimeDouble(new DistExponential(defaultStream, this.serviceTime));
         StationInterface.TimeDouble server = new Delay.TimeDouble("delay", 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();
         }
     }
 
     /** {@inheritDoc} */
     @Override
     public Serializable getSourceId()
     {
         return "MM1Queue41Model";
     }
 
 }