Initial Commit

assignments/src/MV3500Cohort2023MarchJune/homework3/Fredrickson/ExampleSimulationProgram.java

+/**
+ * Copyright (c) 2008-2023, MOVES Institute, Naval Postgraduate School (NPS). All rights reserved.
+ * This work is provided under a BSD open-source license, see project license.html or license.txt
+ * @author brutzman@nps.edu
+ */
+package MV3500Cohort2023MarchJune.homework3.Fredrickson;
+
+//import edu.nps.moves.dis7.entities.swe.platform.surface._001Poseidon;
+import edu.nps.moves.dis7.entities.swe.platform.surface._002Triton;
+import edu.nps.moves.dis7.entities.usa.platform.air.CH53ESuperStallion;
+import edu.nps.moves.dis7.enumerations.*;
+import edu.nps.moves.dis7.pdus.*;
+import edu.nps.moves.dis7.utilities.DisChannel;
+import edu.nps.moves.dis7.utilities.PduFactory;
+import java.time.LocalDateTime;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/** The purpose of this inheritable class is to provide an easily modifiable 
+ *  example simulation program that includes DIS-capable entities performing 
+ *  tasks of interest, and then reporting activity via PDUs to the network.
+ *  Default program initialization includes PDU recording turned on by default.
+ *  @see <a href="https://gitlab.nps.edu/Savage/NetworkedGraphicsMV3500/-/blob/master/examples/src/OpenDis7Examples/ExampleSimulationProgramLog.txt">ExampleSimulationProgramLog.txt</a>
+ *  @see <a href="https://gitlab.nps.edu/Savage/NetworkedGraphicsMV3500/-/blob/master/examples/src/OpenDis7Examples/ExampleSimulationProgramPduCaptureLog.dislog">ExampleSimulationProgramPduCaptureLog.dislog</a>
+ *  @see <a href="https://gitlab.nps.edu/Savage/NetworkedGraphicsMV3500/-/blob/master/examples/src/OpenDis7Examples/ExampleSimulationProgramFlowDiagram.pdf">ExampleSimulationProgramFlowDiagram.pdf</a>
+ *  @see <a href="https://gitlab.nps.edu/Savage/NetworkedGraphicsMV3500/-/blob/master/examples/src/OpenDis7Examples/ExampleSimulationProgramWireshark.png">ExampleSimulationProgramWireshark.png</a>
+ *  @see <a href="https://gitlab.nps.edu/Savage/NetworkedGraphicsMV3500/-/blob/master/examples/src/OpenDis7Examples/ExampleSimulationProgramSequenceDiagram.png">ExampleSimulationProgramSequenceDiagram.png</a>
+ * 
+ * JOHN FREDRICKSON
+ * 
+ */
+public class ExampleSimulationProgram
+{
+    /* **************************** infrastructure code, modification is seldom needed ************************* */
+                 
+    private   String     descriptor = this.getClass().getSimpleName();
+    /** DIS channel defined by network address/port combination includes multiple utility capabilities */
+    protected DisChannel disChannel;
+    /** Factory object used to create new PDU instances */
+    protected PduFactory pduFactory;
+    
+    /** seconds per loop for real-time or simulation execution */
+    private double  simulationTimeStepDuration  =  1.0; // seconds TODO encapsulate
+    /** initial simulation time in seconds */
+    double  simulationTimeInitial = 0.0;
+    /** current simulation time in seconds */
+    double  simulationTimeSeconds = simulationTimeInitial;
+    /** Maximum number of simulation loops */
+    int MAX_LOOP_COUNT = 4;
+    
+    String narrativeMessage1 = new String();
+    String narrativeMessage2 = new String();
+    String narrativeMessage3 = new String();
+    
+    /** EntityID settings for entity 1 */
+    protected EntityID           entityID_1          = new EntityID();
+    /** EntityID settings for entity 2 */
+    protected EntityID           entityID_2          = new EntityID();
+    /** ESPDU for entity 1 */
+    protected EntityStatePdu     entityStatePdu_1;
+    /** ESPDU for entity 2 */
+    protected EntityStatePdu     entityStatePdu_2;
+    /** FirePdu for entity 1 first  weapon (if any) */
+    protected FirePdu            firePdu_1a;
+    /** FirePdu for entity 1 second weapon (if any) */
+    protected FirePdu            firePdu_1b;
+    /** MunitionDescriptor for these weapons */
+    protected MunitionDescriptor munitionDescriptor1;
+    
+    /**
+     * Constructor to create an instance of this class.
+     * Design goal: additional built-in initialization conveniences can go here
+     * to keep your efforts focused on the runSimulation() method.
+     */
+    // base constructor is not invoked automatically by other constructors
+    // https://stackoverflow.com/questions/581873/best-way-to-handle-multiple-constructors-in-java
+    public ExampleSimulationProgram()
+    {
+        initialize();
+    }
+    /**
+     * Constructor to create an instance of this class.
+     * @param newDescriptor describes this program, useful for logging and debugging
+     */
+    public ExampleSimulationProgram(String newDescriptor)
+    {
+        descriptor = newDescriptor;
+        initialize();
+    }
+    /**
+     * Utility Constructor that allows your example simulation program to override default network address and port
+     * @param address network address to use
+     * @param port corresponding network port to use
+     */
+    public ExampleSimulationProgram(String address, int port)
+    {
+        disChannel.setNetworkAddress(address);
+        disChannel.setNetworkPort   (port);
+        initialize();
+    }
+    
+    /** Initialize channel setup for OpenDis7 and report a test PDU
+     * @see initializeDisChannel
+     * @see initializeSimulationEntities */
+    private void initialize()
+    {
+        initializeDisChannel(); // must come first, uses PduFactory
+        
+        initializeSimulationEntities(); // set unchanging parameters
+        
+        disChannel.join(); // TODO further functionality expected
+        
+        String timeStepMessage = "Simulation timestep duration " + getSimulationTimeStepDuration() + " seconds";
+        disChannel.sendCommentPdu(simulationTimeSeconds, DisChannel.COMMENTPDU_SIMULATION_TIMESTEP, timeStepMessage);
+        // additional constructor initialization can go here
+    }
+    
+    /** Initialize channel setup for OpenDis7 and report a test PDU */
+    private void initializeDisChannel()
+    {
+        if (disChannel == null)
+            disChannel = new DisChannel();
+        else
+        {
+            disChannel.printlnTRACE ("*** warning, duplicate invocation of initializeDisChannel() ignored");
+            return;
+        }
+        pduFactory     = disChannel.getPduFactory();
+        disChannel.setDescriptor(this.getClass().getSimpleName()); // ExampleSimulationProgram might be a superclass
+        disChannel.setUpNetworkInterface();
+        disChannel.printlnTRACE ("just checking: disChannel.getNetworkAddress()=" + disChannel.getNetworkAddress() +
+                                                         ", getNetworkPort()="    + disChannel.getNetworkPort());
+
+        disChannel.getPduRecorder().setVerbose(true);
+        
+//      disChannel.sendCommentPdu(VariableRecordType.OTHER, "ArrivalProcessOpenDis7 initialized"); // hello channel, debug
+    }
+    
+    /** Get ready, get set... initialize simulation entities
+     */
+    public void initializeSimulationEntities()
+    {        
+        if (pduFactory == null)
+            pduFactory      = disChannel.getPduFactory();
+        entityStatePdu_1    = pduFactory.makeEntityStatePdu();
+        entityStatePdu_2    = pduFactory.makeEntityStatePdu();
+        firePdu_1a          = pduFactory.makeFirePdu();
+        firePdu_1b          = pduFactory.makeFirePdu();
+        munitionDescriptor1 = new MunitionDescriptor();
+        
+        // Your model setup: define participants.  who's who in this zoo?
+        // Assuming you keep track of entity objects...  here is some support for for Entity 1.
+        
+        // PDU objects are already declared and instances created, so now set their values.
+        entityID_1.setSiteID(1).setApplicationID(2).setEntityID(3); // made-up example ID;
+        disChannel.addEntity(entityID_1);
+        
+        entityID_2.setSiteID(1).setApplicationID(2).setEntityID(4); // made-up example ID; 
+        disChannel.addEntity(entityID_2);
+        // TODO someday, use enumerations for sites as part of a SimulationManager object; e.g. is there a unique site triplet for MOVES Institute?
+
+        entityStatePdu_1.setEntityID(entityID_1);
+        entityStatePdu_1.setForceId(ForceID.FRIENDLY);
+//      entityStatePdu_1.setEntityType(new _001Poseidon());       // note import statement above
+//      entityStatePdu_1.setMarking("Entity #1");
+        entityStatePdu_1.setEntityType(new CH53ESuperStallion()); // note import statement at top
+        entityStatePdu_1.setMarking("Entity #53");
+        entityStatePdu_1.getMarkingString(); // use Netbeans Debug breakpoint here to check left justified...
+
+        entityStatePdu_2.setEntityID(entityID_2);
+        entityStatePdu_2.setForceId(ForceID.OPPOSING);
+        entityStatePdu_2.setEntityType(new _002Triton()); // note import statement above
+        entityStatePdu_2.setMarking("Entity #2");
+
+        // TODO how should we customize this munition?  what are key parameters for your simulation? 
+        // more is needed here by scenario authors...
+        munitionDescriptor1.setQuantity(1);
+        firePdu_1a.setDescriptor(munitionDescriptor1).setRange(1000.0f);
+    }
+                 
+    /**
+     * This runSimulationLoops() method is for you, a customizable programmer-modifiable
+     * code block for defining and running a new simulation of interest.
+     * 
+     * Welcome! Other parts of this program handle bookkeeping and plumbing tasks so that
+     * you can focus on your model entities and activities.
+     * Expandable support includes DIS EntityStatePdu, FirePdu and CommentPdu all available for 
+     * modification and sending in a simulation loop.
+     * Continuous improvement efforts seek to make this program as easy and straightforward
+     * as possible for DIS simulationists to use and adapt.
+     * All of the other methods are setup, teardown and configuration that you may find
+     * interesting, even helpful, but don't really have to worry about.
+     */
+    @SuppressWarnings("SleepWhileInLoop") // yes we might do that
+    public void runSimulationLoops ()
+    {
+      try
+      {              
+        final int     SIMULATION_MAX_LOOP_COUNT = 10; // be deliberate out there!  also avoid infinite loops.
+              int     simulationLoopCount = 0;        // variable, initialized at 0
+              boolean simulationComplete = false;     // sentinel variable as termination condition, are we done yet?
+        
+        // TODO reset Clock Time for today's date and timestamp to zero, providing consistent outputs for each simulation run
+        String timeMessage = "Simulation time " + simulationTimeSeconds + " at LocalDateTime " + LocalDateTime.now();
+        disChannel.sendCommentPdu(simulationTimeSeconds, DisChannel.COMMENTPDU_TIME, timeMessage);
+        // TODO replace enumeration with disChannel.COMMENTPDU_TIME
+        // TODO fix VariableRecordType.TIME_AMP_DATE_VALID
+        
+        // ===================================================================================================
+        // loop the simulation while allowed, programmer can set additional conditions to break out and finish
+        while (simulationLoopCount < SIMULATION_MAX_LOOP_COUNT)  // are we done yet?
+        {
+            simulationLoopCount++; // good practice: increment loop counter as first action in that loop
+            
+            // =============================================================================================
+            // * your own simulation code starts here! *****************************************************
+            // =============================================================================================
+            
+            //  are there any other variables to modify at the beginning of your loop?
+            
+            // are your reading any DIS PDUs from the network?  check for them here
+            
+            // compute a track, update an ESPDU, whatever it is that your model is doing...
+            
+            // Where is my entity?  Insert changes in position; this sample only changes X position.
+            entityStatePdu_1.getEntityLocation().setX(entityStatePdu_1.getEntityLocation().getX() + 1.0); // 1m per timestep
+            
+            // decide whether to fire, and then update the firePdu.  Hmmm, you might want a target to shoot at!
+            
+            // etc. etc. your code goes here for your simulation of interest
+                
+            // something happens between my simulation entities, la de da de da...
+            System.out.println ("... My simulation just did something, no really...");
+            System.out.flush(); // make sure this arrives to user even if other threads somehow become deadlocked
+            
+            
+            // make your reports: narrative code for CommentPdu here (set all to empty strings to avoid sending)
+            narrativeMessage1 = "MV3500 ExampleSimulationProgram";
+            narrativeMessage2 = "runSimulation() loop " + simulationLoopCount;
+            narrativeMessage3 = ""; // intentionally blank for testing
+
+            // your loop termination condition goes here
+            if (simulationLoopCount > MAX_LOOP_COUNT) // for example
+            {
+                simulationComplete = true;
+            }      
+            // =============================================================================================
+            // * your own simulation code is finished here! ************************************************
+            // =============================================================================================
+            
+            // staying synchronized with timestep: wait duration for elapsed time in this loop
+            // Thread.sleep needs a (long) parameter for milliseconds, which are clumsy to use sometimes
+            Thread.sleep((long)(getSimulationTimeStepDuration() * 1000)); // units of seconds * (1000 msec/sec) = milliseconds
+            System.out.println ("... [Pausing for " + getSimulationTimeStepDuration() + " seconds]");
+            
+            // OK now send the status PDUs for this loop, and then continue
+            System.out.println ("... sending PDUs of interest for simulation step " + simulationLoopCount + ", monitor loopback to confirm sent");
+            System.out.flush();
+            
+            // TODO set timesteps in PDUs
+            
+            sendAllPdusForLoopTimestep(simulationTimeSeconds,
+                                       entityStatePdu_1, 
+                                            firePdu_1a, 
+                                         DisChannel.COMMENTPDU_APPLICATION_STATUS, 
+                                           narrativeMessage1, narrativeMessage2, narrativeMessage3);
+            disChannel.sendSinglePdu(simulationTimeSeconds, entityStatePdu_2); // me too i.e. 2!
+            
+            System.out.println ("... [PDUs of interest successfully sent for this loop]");
+            System.out.flush();
+            
+            // ===============================
+            // current loop now finished, check whether to terminate if simulation complete, otherwise continue
+            if (simulationComplete || (simulationLoopCount > 10000)) // for example; including fail-safe condition is good
+            {
+                System.out.println ("... [loop termination condition met, simulationComplete=" + simulationComplete + "]"); // ", final loopCount=" + loopCount + 
+                System.out.flush();
+                break;
+            }
+            simulationTimeSeconds += getSimulationTimeStepDuration(); // good practice: increment simulationTime as lastst action in that loop
+                    
+        }   // end of simulation loop, continue until done
+        // ===================================================================================================// ===================================================================================================// ===================================================================================================// ===================================================================================================
+
+        narrativeMessage2 = "runSimulation() completed successfully"; // all done, so tell everyone else on the channel
+        // TODO better javadoc needs to be autogenerated for VariableRecordType enumerations
+        disChannel.sendCommentPdu(DisChannel.COMMENTPDU_NARRATIVE, narrativeMessage1, narrativeMessage2, narrativeMessage3);
+        System.out.println ("... [final=completion CommentPdu successfully sent for simulation]");
+        
+        disChannel.leave(); // embedded SimulationManager is expected to send appropriate PDUs for entity, application shutdown
+      } 
+      catch (InterruptedException iex) // handle any exception that your code might choose to provoke!
+      {
+        Logger.getLogger(ExampleSimulationProgram.class.getSimpleName()).log(Level.SEVERE, null, iex);
+      }
+    }
+
+    /**
+     * Send EntityState, Fire, Comment PDUs that got updated for this loop, reflecting state of current simulation timestep.
+     * @param simTimeSeconds simulation time in second, applied to PDU as timestamp
+     * @param entityStatePdu the ESPDU to send, if any
+     * @param firePdu        the FirePDU to send, if any
+     * @param commentType    enumeration value describing purpose of the narrative comment PDU
+     * @param comments       String array of narrative comments
+     * @see DisChannel
+//   * @see DisTime // TODO find renamed version
+     * @see <a href="https://docs.oracle.com/javase/tutorial/java/javaOO/arguments.html">Passing Information to a Method or a Constructor</a> Arbitrary Number of Arguments
+     */
+    public void sendAllPdusForLoopTimestep(double simTimeSeconds,
+                                   EntityStatePdu entityStatePdu,
+                                          FirePdu firePdu,
+                               VariableRecordType commentType,
+                                     // vararg... variable-length set of String comments can optionally follow
+                                        String... comments)
+    {
+        if (entityStatePdu != null)
+            disChannel.sendSinglePdu(simTimeSeconds, entityStatePdu);
+            
+        if (firePdu != null)
+            disChannel.sendSinglePdu(simTimeSeconds, firePdu); // bang
+        
+        disChannel.sendCommentPdu(simTimeSeconds, commentType, comments); // empty comments are filtered
+    }
+    
+    /**
+     * Initial execution via main() method: handle args array of command-line initialization (CLI) arguments here
+     * @param args command-line parameters: network address and port
+     */
+    protected void handleArguments (String[] args)
+    {
+        // initial execution: handle args array of initialization arguments here
+        if (args.length == 2) 
+        {
+            if ((args[0] != null) && !args[0].isEmpty())
+                thisProgram.disChannel.setNetworkAddress(args[0]);
+            if ((args[1] != null) && !args[1].isEmpty())
+                thisProgram.disChannel.setNetworkPort(Integer.parseInt(args[1]));
+        }
+        else if (args.length != 0) 
+        {
+            System.err.println("Usage: " + thisProgram.getClass().getSimpleName() + " [address port]");
+            System.exit(-1);
+        }
+    }
+
+    /**
+     * Get simple descriptor (such as parent class name) for this network interface, used in trace statements
+     * @return simple descriptor name
+     */
+    public String getDescriptor() {
+        return descriptor;
+    }
+
+    /**
+     * Set new simple descriptor (such as parent class name) for this network interface, used in trace statements
+     * @param newDescriptor simple descriptor name for this interface
+     */
+    public void setDescriptor(String newDescriptor) {
+        if (newDescriptor == null)
+            newDescriptor = "";
+        this.descriptor = newDescriptor;
+    }
+
+    /**
+     * parameter accessor method
+     * @return the simulationTimeStepDuration in seconds
+     */
+    public double getSimulationTimeStepDuration() {
+        return simulationTimeStepDuration;
+    }
+
+    /**
+     * parameter accessor method
+     * @param timeStepDurationSeconds the simulationTimeStepDuration in seconds to set
+     */
+    public void setSimulationTimeStepDuration(double timeStepDurationSeconds) {
+        this.simulationTimeStepDuration = timeStepDurationSeconds;
+    }
+    
+    /** Locally instantiable copy of program, can be subclassed. */
+    protected static ExampleSimulationProgram thisProgram;
+  
+    /**
+     * Main method is first executed when a program instance is loaded.
+     * @see <a href="https://docs.oracle.com/javase/tutorial/getStarted/application/index.html">Java Tutorials: A Closer Look at the "Hello World!" Application</a>
+     * @param args command-line parameters: network address and port.
+     *    Command-line arguments are an array of optional String parameters that are passed from execution environment during invocation
+     */
+    public static void main(String[] args)
+    {
+        thisProgram = new ExampleSimulationProgram("test constructor"); // create instance of self within static main() method
+        
+        thisProgram.disChannel.printlnTRACE("main() started...");
+        
+        thisProgram.handleArguments(args); // process any command-line invocation arguments
+
+        thisProgram.runSimulationLoops(); // ... your simulation execution code goes in there ...
+        
+        thisProgram.disChannel.tearDownNetworkInterface(); // make sure no processes are left lingering
+        
+        thisProgram.disChannel.printlnTRACE("complete."); // report successful completion
+        
+        System.exit(0); // ensure all threads and sockets released
+    }
+}