A Simple Discrete-Event Simulation: Part 77

Today I created a combined Queue-Process component I called a Combined component. You can see it in today’s version of the model as component 50, labeled C21, having replaced queue 21 and process 21. I suspect that this will become the default Process component once I have it cleaned up and a bit more bulletproof. I started with a Queue component and then added features until I had the behaviors I wanted. The main change is that the hand-off between the queue and process parts is handled internally and instantaneously. The mechanism for pulling from the previous component had to be adjust as well, as did the code to draw the 2D and 3D graphic displays.

Here’s the code for the new component:

    function CombinedComponent(traversalTime, processTime, processTimeSwitch, queueCapacity, processCapacity, routingTable) {
      if (typeof queueCapacity === "undefined") {queueCapacity = Infinity;}
      if (typeof processCapacity === "undefined") {processCapacity = Infinity;}
      if (typeof routingTable === "undefined") {routingTable = [1.0];}
      setOfComponents.push(this);
      this.componentID = getNewComponentID();
      this.componentType = "Combined";
      this.componentName = "Combined";
      this.componentGroup = "Combined";
      this.exclusive = false;
      this.routingMethod = 3;  //1: one connection, 2: distribution, 3 routing
      this.previousComponentList = [];
      this.previousComponentCount = 0;
      this.nextComponentList = [];
      this.nextComponentCount = 0;
      this.nextComponentIDList = [];
      this.traversalTime = traversalTime;
      this.processTime = processTime;
      this.processTimeSwitch = processTimeSwitch;
      this.queueCapacity = queueCapacity;  //negative or very large means infinite capacity and non-exclusive by default)
      this.processCapacity = processCapacity;
      this.savedDestination = -1;
      this.previousComponentIndex = 0;
      this.nextComponentIndex = 0;
      this.entityQueue = [];
      this.processQueue = [];
      this.routingTable = routingTable;
      this.openStatus = true;
      this.entryTime = "";
      this.entryEntityID = "";
      this.exitTime = "";
      this.exitEntityID = "";
      this.exitResidenceTime = "";
      this.countInQueue = 0;
      this.countInTraversal = 0;
      this.countInProcessQueue = 0;
      this.countInProcess = 0;
      this.activity = "";
      this.endEntryDisplayTime = 0;
      this.endExitDisplayTime = 0;
      this.endAllDisplayTime = 0;
      this.displayDelay = 0;
      this.graphic = null;

      this.reset = function() {
        this.savedDestination = -1;
        this.previousComponentIndex = this.previousComponentCount - 1;
        this.nextComponentIndex = this.nextComponentCount - 1;
        this.entityQueue = [];
        this.processQueue = [];
        this.openStatus = true;
        this.entryTime = "";
        this.entryEntityID = "";
        this.exitTime = "";
        this.exitEntityID = "";
        this.exitResidenceTime = "";
        this.countInQueue = 0;
        this.countInTraversal = 0;
        this.activity = "";
        this.endEntryDisplayTime = 0;
        this.endExitDisplayTime = 0;
        this.endAllDisplayTime = 0;
      };
      this.assignPreviousComponent = function(prev) {
        this.previousComponentList.push(prev);
        this.previousComponentCount++;
        this.previousComponentIndex = this.previousComponentCount - 1;
      };
      this.assignNextComponent = function(next) {  //CombinedComponent
        this.nextComponentList.push(next);
        this.nextComponentCount++;
        this.nextComponentIndex = this.nextComponentCount - 1;
        next.assignPreviousComponent(this);
      };
      this.getNextComponentIDs = function() {
        for (var i = 0; i < this.nextComponentCount; i++) {
          if (this.nextComponentList[i].getComponentType() != "Path") {
            this.nextComponentIDList[i] = this.nextComponentList[i].getComponentID();
          } else {
            this.nextComponentIDList[i] = this.nextComponentList[i].passComponentID();
          }
        }
      };
      this.verifyLinks = function() {
        var i;
        var error = "";
        if (this.nextComponentCount > 0) {
          for (i = 0; i < this.nextComponentCount; i++) {  //>
            if (this.nextComponentList[i]) {  //link exists
              if (typeof this.nextComponentList[i] === "object") {  //link points to an object
                if ("componentType" in this.nextComponentList[i]) {  //object contains member componentType
                  if ((this.nextComponentList[i].componentType == "Arrivals") ||
                      (this.nextComponentList[i].componentType == "Entry")) {
                    error += this.componentType + " comp. " + this.componentID + " next comp. list element " + i + " is not an allowed comp.\n";
                  }
                } else {
                  //linked object does not contain member componentType
                  error += this.componentType + " comp. " + this.componentID + " next comp. list item " + i + " does not have componentType\n";
                }
              } else {
                //link points to something that is not an object
                error += this.componentType + " comp. " + this.componentID + " next comp. list item " + i + " is not an object\n";
              }
            } else {
              //link that should exist does not
              error += this.componentType + " comp. " + this.componentID + " next comp. list item " + i + " does not exist\n";
            }
          }
        } else {
          error += this.componentType + " comp. " + this.componentID + " has index of zero next components\n";
        }
        if (this.previousComponentCount > 0) {
          for (i = 0; i < this.previousComponentCount; i++) {  //>
            if (this.previousComponentList[i]) {  //link exists
              if (typeof this.previousComponentList[i] === "object") {  //link points to an object
                if ("componentType" in this.previousComponentList[i]) {  //object contains member componentType
                  if ((this.previousComponentList[i].componentType == "Arrivals") ||
                      (this.previousComponentList[i].componentType == "Exit")) {
                    error += this.componentType + " comp. " + this.componentID + " previous comp. list element " + i + " is not an allowed comp.\n";
                  }
                } else {
                  //linked object does not contain member componentType
                  error += this.componentType + " comp. " + this.componentID + " previous comp. list item " + i + " does not have componentType\n";
                }
              } else {
                //link points to something that is not an object
                error += this.componentType + " comp. " + this.componentID + " previous comp. list item " + i + " is not an object\n";
              }
            } else {
              //link that should exist does not
              error += this.componentType + " comp. " + this.componentID + " previous comp. list item " + i + " does not exist\n";
            }
          }
        } else {
          error += this.componentType + " comp. " + this.componentID + " has index of zero previous components\n";
        }
        return error;
      };

      this.getComponentID = function() {
        return this.componentID;
      };
      this.getComponentType = function() {  //CombinedComponent
        return this.componentType;
      };
      this.getComponentName = function() {
        return this.componentName;
      };
      this.setComponentName = function(componentName) {
        this.componentName = componentName;
      };
      this.getComponentGroup = function() {
        return this.componentGroup;
      };
      this.setComponentGroup = function(componentGroup) {
        this.componentGroup = componentGroup;
        addToGroupStatsNameListWrapper(componentGroup);
      };
      this.getExclusive = function() {
        return this.exclusive;
      };
      this.setExclusive = function(exclusive) {
        this.exclusive = exclusive;
      };
      this.getTraversalTime = function() {
        return this.traversalTime;
      };
      this.getProcessTime = function() {
        return this.processTime;
      };
      this.getProcessTimeSwitch = function() {
        return this.processTimeSwitch;
      };
      this.setProcessTimeSwitch = function(processTimeSwitch) {
        this.processTimeSwitch = processTimeSwitch;
      };
      this.getQueueCapacity = function() {
        return this.queueCapacity;
      };
      this.setQueueCapacity = function(queueCapacity) {
        this.queueCapacity = queueCapacity;
      };
      this.getProcessCapacity = function() {
        return this.processCapacity;
      };
      this.setProcessCapacity = function(processCapacity) {
        this.processCapacity = processCapacity;
      };
      this.getOpenStatus = function() {
        return this.openStatus;
      };
      this.setOpenStatus = function(openStatus) {
        this.openStatus = openStatus;
      };
      this.getForwardAttemptTime = function() {
        if (this.countInProcessQueue > this.countInProcess) {
          return this.processQueue[this.countInProcessQueue - 1].getForwardAttemptTime();
        } else {
          return Infinity;
        }
      };
      this.getRoutingMethod = function() {
        return this.routingMethod;
      };
      this.setRoutingMethod = function(routingMethod) {
        this.routingMethod = routingMethod;
      };
      this.getEntryTime = function() {
        return this.entryTime;
      };
      this.getEntryEntityID = function() {
        return this.entryEntityID;
      };
      this.getExitTime = function() {
        return this.exitTime;
      };
      this.getExitEntityID = function() {
        return this.exitEntityID;
      };
      this.getExitResidenceTime = function() {
        return this.exitResidenceTime;
      };
      this.getCountInQueue = function() {
        return this.countInQueue;
      };
      this.getCountInTraversal = function() {
        return this.countInTraversal;
      };
      this.getCountInProcessQueue = function() {
        return this.countInProcessQueue;
      };
      this.getCountInProcess = function() {
        return this.countInProcess;
      };
      this.getActivity = function() {
        return this.activity;
      };
      this.getEndEntryDisplayTime = function() {
        return this.endEntryDisplayTime;
      };
      this.getEndExitDisplayTime = function() {
        return this.endExitDisplayTime;
      };
      this.getEndAllDisplayTime = function() {
        return this.endAllDisplayTime;
      };

      this.dataGroup = new DisplayGroup1();
      this.defineDataGroup = function(displayDelay, x, y, vw, bc, vc, lc) {
        this.displayDelay = displayDelay;
        this.dataGroup.define(this.componentID, this.componentType, x, y, vw, bc, vc, lc);
      };
      this.dataGroup.addValue(this.entryEntityID, "Entry ID", "integer");
      this.dataGroup.addValue(this.countInQueue, "# In Queue", "integer");
      this.dataGroup.addValue(this.countInTraversal, "# Traversing", "integer");
      this.dataGroup.addValue(this.maxCapacity, "Capacity", "integer");
      this.dataGroup.addValue(this.exitEntityID, "Exit ID", "integer");
      //this.dataGroup.addValue(this.exitResidenceTime,"Resdnce Tm","numdec",5);
      this.dataGroup.addValue(this.nextComponentIndex, "Next comp.", "integer");
      this.dataGroup.addValue(this.activity, "Activity", "text");
      this.dataGroup.addValue(this.getForwardAttemptTime(), "Fwd Attmpt", "numdec", 5);

      this.assignDisplayValues = function() {
        this.dataGroup.valueList[0].value = this.entryEntityID;
        this.dataGroup.valueList[1].value = this.countInQueue;
        this.dataGroup.valueList[2].value = this.countInTraversal;
        this.dataGroup.valueList[3].value = this.maxCapacity;
        this.dataGroup.valueList[4].value = this.exitEntityID;
        //this.dataGroup.valueList[5].value = this.exitResidenceTime;
        this.dataGroup.valueList[5].value = this.nextComponentIndex;
        this.dataGroup.valueList[6].value = this.activity;
        this.dataGroup.valueList[7].value = this.getForwardAttemptTime();
        if (this.exclusive) {
          if (this.openStatus) {
            this.dataGroup.setBorderColor("#00FF00");
          } else {
            this.dataGroup.setBorderColor("#FF0000");
          }
        }
      };

      this.drawData = function() {  //Combined component
        this.assignDisplayValues();
        this.dataGroup.drawBasic();
      };

      this.defineGraphic = function(graphic) {
        this.graphic = graphic;
      };
      this.updateGraphic = function() {
        this.graphic.setTraverseValue(this.countInTraversal);
        this.graphic.setCountValue(this.countInQueue);
      };

      this.isOpen = function() {  //CombinedComponent
        if (this.exclusive) {
          if (this.currentCount() < (this.queueCapacity + this.processCapacity)) {
            this.openStatus = true;
          } else {
            this.openStatus = false;
          }
          for (var i = 0; i < this.previousComponentCount; i++) {
            if (this.previousComponentList[i].getComponentType() == "Path") {
              this.previousComponentList[i].setPreviousStatus(this.openStatus);  //this may only be needed to determine open/closed status for display, count <=> capacity used when something is trying to enter
            }
          }
        }
        return this.openStatus;  //if not exclusive should be set to true by default
      };
      this.clearEntryDisplay = function() {
        //only clear display if a new one hasn't started a new timer
        if (globalSimClock >= this.endEntryDisplayTime) {
          this.entryTime = "";
          this.entryEntityID = "";
        }
        if (globalSimClock >= this.endAllDisplayTime) {
          this.activity = "";
        }
        //displayProgressText("Queue entry "+this.componentID+" clears at time "+globalSimClock.toFixed(6));
      };
      this.clearExitDisplay = function() {
        //only clear display if a new one hasn't started a new timer
        if (globalSimClock >= this.endExitDisplayTime) {
          this.exitTime = "";
          this.exitEntityID = "";
          this.exitResidenceTime = "";
        }
        if (globalSimClock >= this.endAllDisplayTime) {
          this.activity = "";
        }
        //displayProgressText("Queue exit "+this.componentID+" clears at time "+globalSimClock.toFixed(6));
      };
      this.currentCount = function() {
        var count = 0;
        if (this.exclusive) {
          //start with entities already in component
          count = this.countInQueue + this.countInProcessQueue;
          //add entities in feeding paths
          for (var i = 0; i < this.previousComponentCount; i++) {
            if (this.previousComponentList[i].componentType == "Path") {  //TODO: consider adding test for whether path is boundary component for associated exclusive group of components -- done this by inserting no-time/no-space control components
              count += this.previousComponentList[i].currentCount();
            }
          }
        }
        return count;
      };
      this.pullFromPrevious = function() {  //CombinedComponent
        var oldest = this.previousComponentList[0].getForwardAttemptTime();
        var oldestIndex = 0;
        for (var i = 1; i < this.previousComponentCount; i++) {
          var age = this.previousComponentList[i].getForwardAttemptTime();
          if (age < oldest) {
            oldestIndex = i;
          }
        }
        if (this.previousComponentList[oldestIndex].getComponentType() != "Path") {
          if (this.previousComponentList[oldestIndex].getComponentType() != "Entry") {
            //TODO: this should call forward entity in a way that ensures that previous component only sends entity to where it is requested and if one is available and if this is a legitimate destination
            this.previousComponentList[oldestIndex].forwardEntity(this.componentID);
          }
        } else {
          displayProgressText("Combined comp. " + this.componentID + " pulls from previous at time " + globalSimClock.toFixed(6));
          this.previousComponentList[oldestIndex].pullFromPrevious(this.componentID);
        }
      };
      this.nextOpen = function() {
        var startIndex = this.nextComponentIndex;
        var tempIndex = startIndex;
        do {
          tempIndex++;
          if (tempIndex >= this.nextComponentCount) {
            tempIndex = 0;
          }
          if (this.nextComponentList[tempIndex].isOpen()) {
            //open link found, update and return nextComponentIndex
            return tempIndex;
          }
        } while (tempIndex != startIndex);
        return -1;  //no open links found, leave nextComponentIndex unchanged
      };
      this.queueToProcess = function() {
        if (this.countInQueue > this.countInTraversal) {  //an entity is available to move
          var entity = this.entityQueue.pop();
          this.countInQueue--;
          this.processQueue.unshift(entity);
          this.countInProcessQueue++;
          this.countInProcess++;
          var pTime = this.processTime[entityProcessTimeIndex(entity,this.processTimeSwitch)];
          advance(pTime, this, "processComplete", entity);
          //should be open now
          if (this.exclusive) {
            if (!this.openStatus) {
              displayProgressText("Combined comp. " + this.componentID + " calls pull from previous at time " + globalSimClock.toFixed(6));
              this.pullFromPrevious(); //TODO: call this with a modest (~1 time unit) delay to account for reaction time? //may or may not successfully get an entity but should always be called
            }
          }
        }
      };
      this.traverseComplete = function() {
        this.countInTraversal--;   //TODO: ensure handled properly if traversal time is zero
        //figure out which entity just finished traversing
        var tempID = this.entityQueue[this.countInTraversal].entityID;  //TODO: this works for FIFO, but not necessarily for other logics
        //this.entityQueue[this.countInTraversal].setForwardAttemptTime(globalSimClock);
        displayProgressText("Queue comp. " + this.componentID + " entity: " + tempID + " trav. at time " + globalSimClock.toFixed(6));
        if (this.countInQueue - this.countInTraversal == 1) {  //don't bother trying to forward unless this is the lead item in the queue
          if (this.countInProcessQueue < this.processCapacity) {  //is there space in the process queue
            this.queueToProcess();
          }
        }
      };
      this.processComplete = function() {
        this.countInProcess--;
        //figure out which entity just finished processing
        var tempID = this.processQueue[this.countInProcess].entityID;  //TODO: this works for FIFO, but not necessarily for other logics
        this.processQueue[this.countInProcess].setForwardAttemptTime(globalSimClock);
        displayProgressText("Combined comp. " + this.componentID + " entity: " + tempID + " processed at " + globalSimClock.toFixed(6));
        if (this.countInProcessQueue - this.countInProcess == 1) {  //don't bother trying to forward unless this is the lead item in the queue
          this.forwardEntity();
        }
      };
      this.forwardEntity = function(destIndex) {  //CombinedComponent
        if (typeof destIndex === "undefined") {destIndex = -1;}
        var dest = -1;
        if (destIndex >= 0) {  //pull request from a specific downstream component, must send entity there
          if (this.routingMethod == 1) { //single connection, nothing to do
            dest = 0;
          } else if (this.routingMethod == 2) { //distribution, send to any request
            dest = 0;
            while ((this.nextComponentIDList[dest] != destIndex) && (dest < this.nextComponentCount)) {  //second test should not be needed, loop can't fail to return valid result
              dest++;
            }
          } else if (this.routingMethod == 3) {  //model routing logic, TODO: don't forward if not desired destination
            dest = 0;
            while ((this.nextComponentIDList[dest] != destIndex) && (dest < this.nextComponentCount)) {  //second test should not be needed, loop can't fail to return valid result
              dest++;
            }
          }
          dummy2 = 0;
        } else {
          if (this.routingMethod == 1) {  //single connection
            if (this.nextComponentList[0].isOpen()) {
              dest = 0;
            }
          } else if (this.routingMethod == 2) {  //distribution
            var nextIndex = this.nextOpen();
            if (nextIndex >= 0) {
              dest = nextIndex;
              //this.nextComponentIndex = dest;
            }
          } else if (this.routingMethod == 3) {  //model routing logic
            if (this.savedDestination >= 0) {
              dest = this.savedDestination;
            } else {
              dest = 0;
              var test = Math.random();
              //need access to entity type but can't pop it off queue here
              var index = this.countInQueue - 1;
              if (index >= 0) {
                index = entityDiversionPercentIndex(this.entityQueue[index]);  //get head item in queue and find out what type it is
              } else {
                index = 0;  //nothing in queue, following code will work but nothing will be popped and processed below
              }
              while (test > this.routingTable[index][dest]) {
                dest++;
              }
              if (dest <= this.nextComponentCount) {
                if (!this.nextComponentList[dest].isOpen()) {
                  dest = -1;  //this works only because destinations are unique (i.e., can't send to multiple parallel types/processes, must send to a single queue feeding them)
                }
              } else {
                alert("Queue comp. tried to assign destination with too high of an index")
              }
              if (dest >= 0) {
                this.savedDestination = dest;
              }
            }
          } else {  //0 uninitialized or anything else
            alert("comp. " + this.componentID + " incorrect routing method: " + this.routingMethod);
          }
        }
        if (dest >= 0) {
          if (this.countInProcessQueue > this.countInProcess) {
            var entity = this.processQueue.pop();  //TODO-: are we testing to ensure the next entity is really available
            //calculate how long item was in queue
            this.exitResidenceTime = globalSimClock - entity.getLocalEntryTime();
            //now use this to calculate stats for the interval
            this.exitTime = globalSimClock;
            this.exitEntityID = entity.entityID;
            this.activity = "forward entity";
            this.endExitDisplayTime = globalSimClock + this.displayDelay;
            this.endAllDisplayTime = this.endExitDisplayTime;
            advance(this.displayDelay, this, "clearExitDisplay");
            displayProgressText("Combined comp. " + this.componentID + " forwards entity: " + this.exitEntityID + " at time " + globalSimClock.toFixed(6));

            this.countInProcessQueue--;
            this.queueToProcess();
            this.isOpen();
            this.nextComponentIndex = dest;
            this.savedDestination = -1;
            this.nextComponentList[dest].receiveEntity(entity);
            //record stats
            if (this.nextComponentList[dest].getComponentGroup() != entity.getComponentGroup()) {  //truly leaving a component group along the current connection
              recordGroupStatsWrapper(this.componentGroup, entity.getComponentGroupEntryTime(), entity);
            }
          }
        }
      };
      this.receiveEntity = function(entity) {  //CombinedComponent
        //receive the entity
        entity.setLocalEntryTime();  //record time entity entered queue
        if (entity.getComponentGroup() != this.componentGroup) {
          entity.setComponentGroup(this.componentGroup);
          entity.setComponentGroupEntryTime(globalSimClock);
          recordGroupStatsSystemEntryWrapper(this.componentGroup,entity);
        }
        entity.setForwardAttemptTime(Infinity);
        entity.setPermission(false);  //entity has reached end of related components group, permission no longer matters
        this.entityQueue.unshift(entity);
        this.countInQueue++;
        this.countInTraversal++;   //TODO: ensure handled properly if traversal time is zero
        this.isOpen();
        //display what was done
        this.entryTime = globalSimClock;
        this.entryEntityID = entity.entityID;
        this.activity = "receive entity";
        //set timer to clear the display after a bit
        this.endEntryDisplayTime = globalSimClock + this.displayDelay;
        this.endAllDisplayTime = this.endEntryDisplayTime;
        advance(this.displayDelay, this, "clearEntryDisplay");
        displayProgressText("Combined comp. " + this.componentID + " receives entity: " + this.entryEntityID + " at time " + globalSimClock.toFixed(6));
        if (this.traversalTime > 0) {
          //set timer for the new entity to track its traversal time
          advance(this.traversalTime, this, "traverseComplete");  //TODO: don't bother if traversal time is zero, also insure countInTraversal is decremented (or not incremented) as needed
        } else if (this.traversalTime == 0.0) {
          this.traverseComplete();
        }
      };
      this.activate = function(nextState) {
        if (nextState == "clearEntryDisplay") {
          this.clearEntryDisplay();
        } else if (nextState == "clearExitDisplay") {
          this.clearExitDisplay();
        } else if (nextState == "traverseComplete") {
          this.traverseComplete();
        } else if (nextState == "processComplete") {
          this.processComplete();
        } else {
          errorUndefinedAdvanceState(this.entityID, this.nextState);
        }
      };  //this.activate
    }  //CombinedComponent

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function CombinedComponent(traversalTime, processTime, processTimeSwitch, queueCapacity, processCapacity, routingTable) {

if (typeof queueCapacity === "undefined") {queueCapacity = Infinity;}

if (typeof processCapacity === "undefined") {processCapacity = Infinity;}

if (typeof routingTable === "undefined") {routingTable = [1.0];}

setOfComponents.push(this);

this.componentID = getNewComponentID();

this.componentType = "Combined";

this.componentName = "Combined";

this.componentGroup = "Combined";

this.exclusive = false;

this.routingMethod = 3; //1: one connection, 2: distribution, 3 routing

this.previousComponentList = [];

this.previousComponentCount = 0;

this.nextComponentList = [];

this.nextComponentCount = 0;

this.nextComponentIDList = [];

this.traversalTime = traversalTime;

this.processTime = processTime;

this.processTimeSwitch = processTimeSwitch;

this.queueCapacity = queueCapacity; //negative or very large means infinite capacity and non-exclusive by default)

this.processCapacity = processCapacity;

this.savedDestination = -1;

this.previousComponentIndex = 0;

this.nextComponentIndex = 0;

this.entityQueue = [];

this.processQueue = [];

this.routingTable = routingTable;

this.openStatus = true;

this.entryTime = "";

this.entryEntityID = "";

this.exitTime = "";

this.exitEntityID = "";

this.exitResidenceTime = "";

this.countInQueue = 0;

this.countInTraversal = 0;

this.countInProcessQueue = 0;

this.countInProcess = 0;

this.activity = "";

this.endEntryDisplayTime = 0;

this.endExitDisplayTime = 0;

this.endAllDisplayTime = 0;

this.displayDelay = 0;

this.graphic = null;

this.reset = function() {

this.savedDestination = -1;

this.previousComponentIndex = this.previousComponentCount - 1;

this.nextComponentIndex = this.nextComponentCount - 1;

this.entityQueue = [];

this.processQueue = [];

this.openStatus = true;

this.entryTime = "";

this.entryEntityID = "";

this.exitTime = "";

this.exitEntityID = "";

this.exitResidenceTime = "";

this.countInQueue = 0;

this.countInTraversal = 0;

this.activity = "";

this.endEntryDisplayTime = 0;

this.endExitDisplayTime = 0;

this.endAllDisplayTime = 0;

};

this.assignPreviousComponent = function(prev) {

this.previousComponentList.push(prev);

this.previousComponentCount++;

this.previousComponentIndex = this.previousComponentCount - 1;

};

this.assignNextComponent = function(next) { //CombinedComponent

this.nextComponentList.push(next);

this.nextComponentCount++;

this.nextComponentIndex = this.nextComponentCount - 1;

next.assignPreviousComponent(this);

};

this.getNextComponentIDs = function() {

for (var i = 0; i < this.nextComponentCount; i++) {

if (this.nextComponentList[i].getComponentType() != "Path") {

this.nextComponentIDList[i] = this.nextComponentList[i].getComponentID();

} else {

this.nextComponentIDList[i] = this.nextComponentList[i].passComponentID();

}

};

this.verifyLinks = function() {

var i;

var error = "";

if (this.nextComponentCount > 0) {

for (i = 0; i < this.nextComponentCount; i++) { //>

if (this.nextComponentList[i]) { //link exists

if (typeof this.nextComponentList[i] === "object") { //link points to an object

if ("componentType" in this.nextComponentList[i]) { //object contains member componentType

if ((this.nextComponentList[i].componentType == "Arrivals") ||

(this.nextComponentList[i].componentType == "Entry")) {

error += this.componentType + " comp. " + this.componentID + " next comp. list element " + i + " is not an allowed comp.\n";

}

} else {

//linked object does not contain member componentType

error += this.componentType + " comp. " + this.componentID + " next comp. list item " + i + " does not have componentType\n";

}

} else {

//link points to something that is not an object

error += this.componentType + " comp. " + this.componentID + " next comp. list item " + i + " is not an object\n";

}

} else {

//link that should exist does not

error += this.componentType + " comp. " + this.componentID + " next comp. list item " + i + " does not exist\n";

}

} else {

error += this.componentType + " comp. " + this.componentID + " has index of zero next components\n";

}

if (this.previousComponentCount > 0) {

for (i = 0; i < this.previousComponentCount; i++) { //>

if (this.previousComponentList[i]) { //link exists

if (typeof this.previousComponentList[i] === "object") { //link points to an object

if ("componentType" in this.previousComponentList[i]) { //object contains member componentType

if ((this.previousComponentList[i].componentType == "Arrivals") ||

(this.previousComponentList[i].componentType == "Exit")) {

error += this.componentType + " comp. " + this.componentID + " previous comp. list element " + i + " is not an allowed comp.\n";

}

} else {

//linked object does not contain member componentType

error += this.componentType + " comp. " + this.componentID + " previous comp. list item " + i + " does not have componentType\n";

}

} else {

//link points to something that is not an object

error += this.componentType + " comp. " + this.componentID + " previous comp. list item " + i + " is not an object\n";

}

} else {

//link that should exist does not

error += this.componentType + " comp. " + this.componentID + " previous comp. list item " + i + " does not exist\n";

}

} else {

error += this.componentType + " comp. " + this.componentID + " has index of zero previous components\n";

}

return error;

};

this.getComponentID = function() {

return this.componentID;

};

this.getComponentType = function() { //CombinedComponent

return this.componentType;

};

this.getComponentName = function() {

return this.componentName;

};

this.setComponentName = function(componentName) {

this.componentName = componentName;

};

this.getComponentGroup = function() {

return this.componentGroup;

};

this.setComponentGroup = function(componentGroup) {

this.componentGroup = componentGroup;

addToGroupStatsNameListWrapper(componentGroup);

};

this.getExclusive = function() {

return this.exclusive;

};

this.setExclusive = function(exclusive) {

this.exclusive = exclusive;

};

this.getTraversalTime = function() {

return this.traversalTime;

};

this.getProcessTime = function() {

return this.processTime;

};

this.getProcessTimeSwitch = function() {

return this.processTimeSwitch;

};

this.setProcessTimeSwitch = function(processTimeSwitch) {

this.processTimeSwitch = processTimeSwitch;

};

this.getQueueCapacity = function() {

return this.queueCapacity;

};

this.setQueueCapacity = function(queueCapacity) {

this.queueCapacity = queueCapacity;

};

this.getProcessCapacity = function() {

return this.processCapacity;

};

this.setProcessCapacity = function(processCapacity) {

this.processCapacity = processCapacity;

};

this.getOpenStatus = function() {

return this.openStatus;

};

this.setOpenStatus = function(openStatus) {

this.openStatus = openStatus;

};

this.getForwardAttemptTime = function() {

if (this.countInProcessQueue > this.countInProcess) {

return this.processQueue[this.countInProcessQueue - 1].getForwardAttemptTime();

} else {

return Infinity;

}

};

this.getRoutingMethod = function() {

return this.routingMethod;

};

this.setRoutingMethod = function(routingMethod) {

this.routingMethod = routingMethod;

};

this.getEntryTime = function() {

return this.entryTime;

};

this.getEntryEntityID = function() {

return this.entryEntityID;

};

this.getExitTime = function() {

return this.exitTime;

};

this.getExitEntityID = function() {

return this.exitEntityID;

};

this.getExitResidenceTime = function() {

return this.exitResidenceTime;

};

this.getCountInQueue = function() {

return this.countInQueue;

};

this.getCountInTraversal = function() {

return this.countInTraversal;

};

this.getCountInProcessQueue = function() {

return this.countInProcessQueue;

};

this.getCountInProcess = function() {

return this.countInProcess;

};

this.getActivity = function() {

return this.activity;

};

this.getEndEntryDisplayTime = function() {

return this.endEntryDisplayTime;

};

this.getEndExitDisplayTime = function() {

return this.endExitDisplayTime;

};

this.getEndAllDisplayTime = function() {

return this.endAllDisplayTime;

};

this.dataGroup = new DisplayGroup1();

this.defineDataGroup = function(displayDelay, x, y, vw, bc, vc, lc) {

this.displayDelay = displayDelay;

this.dataGroup.define(this.componentID, this.componentType, x, y, vw, bc, vc, lc);

};

this.dataGroup.addValue(this.entryEntityID, "Entry ID", "integer");

this.dataGroup.addValue(this.countInQueue, "# In Queue", "integer");

this.dataGroup.addValue(this.countInTraversal, "# Traversing", "integer");

this.dataGroup.addValue(this.maxCapacity, "Capacity", "integer");

this.dataGroup.addValue(this.exitEntityID, "Exit ID", "integer");

//this.dataGroup.addValue(this.exitResidenceTime,"Resdnce Tm","numdec",5);

this.dataGroup.addValue(this.nextComponentIndex, "Next comp.", "integer");

this.dataGroup.addValue(this.activity, "Activity", "text");

this.dataGroup.addValue(this.getForwardAttemptTime(), "Fwd Attmpt", "numdec", 5);

this.assignDisplayValues = function() {

this.dataGroup.valueList[0].value = this.entryEntityID;

this.dataGroup.valueList[1].value = this.countInQueue;

this.dataGroup.valueList[2].value = this.countInTraversal;

this.dataGroup.valueList[3].value = this.maxCapacity;

this.dataGroup.valueList[4].value = this.exitEntityID;

//this.dataGroup.valueList[5].value = this.exitResidenceTime;

this.dataGroup.valueList[5].value = this.nextComponentIndex;

this.dataGroup.valueList[6].value = this.activity;

this.dataGroup.valueList[7].value = this.getForwardAttemptTime();

if (this.exclusive) {

if (this.openStatus) {

this.dataGroup.setBorderColor("#00FF00");

} else {

this.dataGroup.setBorderColor("#FF0000");

}

};

this.drawData = function() { //Combined component

this.assignDisplayValues();

this.dataGroup.drawBasic();

};

this.defineGraphic = function(graphic) {

this.graphic = graphic;

};

this.updateGraphic = function() {

this.graphic.setTraverseValue(this.countInTraversal);

this.graphic.setCountValue(this.countInQueue);

};

this.isOpen = function() { //CombinedComponent

if (this.exclusive) {

if (this.currentCount() < (this.queueCapacity + this.processCapacity)) {

this.openStatus = true;

} else {

this.openStatus = false;

}

for (var i = 0; i < this.previousComponentCount; i++) {

if (this.previousComponentList[i].getComponentType() == "Path") {

this.previousComponentList[i].setPreviousStatus(this.openStatus); //this may only be needed to determine open/closed status for display, count <=> capacity used when something is trying to enter

}

return this.openStatus; //if not exclusive should be set to true by default

};

this.clearEntryDisplay = function() {

//only clear display if a new one hasn't started a new timer

if (globalSimClock >= this.endEntryDisplayTime) {

this.entryTime = "";

this.entryEntityID = "";

}

if (globalSimClock >= this.endAllDisplayTime) {

this.activity = "";

}

//displayProgressText("Queue entry "+this.componentID+" clears at time "+globalSimClock.toFixed(6));

};

this.clearExitDisplay = function() {

//only clear display if a new one hasn't started a new timer

if (globalSimClock >= this.endExitDisplayTime) {

this.exitTime = "";

this.exitEntityID = "";

this.exitResidenceTime = "";

}

if (globalSimClock >= this.endAllDisplayTime) {

this.activity = "";

}

//displayProgressText("Queue exit "+this.componentID+" clears at time "+globalSimClock.toFixed(6));

};

this.currentCount = function() {

var count = 0;

if (this.exclusive) {

//start with entities already in component

count = this.countInQueue + this.countInProcessQueue;

//add entities in feeding paths

for (var i = 0; i < this.previousComponentCount; i++) {

if (this.previousComponentList[i].componentType == "Path") { //TODO: consider adding test for whether path is boundary component for associated exclusive group of components -- done this by inserting no-time/no-space control components

count += this.previousComponentList[i].currentCount();

}

return count;

};

this.pullFromPrevious = function() { //CombinedComponent

var oldest = this.previousComponentList[0].getForwardAttemptTime();

var oldestIndex = 0;

for (var i = 1; i < this.previousComponentCount; i++) {

var age = this.previousComponentList[i].getForwardAttemptTime();

if (age < oldest) {

oldestIndex = i;

}

if (this.previousComponentList[oldestIndex].getComponentType() != "Path") {

if (this.previousComponentList[oldestIndex].getComponentType() != "Entry") {

//TODO: this should call forward entity in a way that ensures that previous component only sends entity to where it is requested and if one is available and if this is a legitimate destination

this.previousComponentList[oldestIndex].forwardEntity(this.componentID);

}

} else {

displayProgressText("Combined comp. " + this.componentID + " pulls from previous at time " + globalSimClock.toFixed(6));

this.previousComponentList[oldestIndex].pullFromPrevious(this.componentID);

}

};

this.nextOpen = function() {

var startIndex = this.nextComponentIndex;

var tempIndex = startIndex;

do {

tempIndex++;

if (tempIndex >= this.nextComponentCount) {

tempIndex = 0;

}

if (this.nextComponentList[tempIndex].isOpen()) {

//open link found, update and return nextComponentIndex

return tempIndex;

}

} while (tempIndex != startIndex);

return -1; //no open links found, leave nextComponentIndex unchanged

};

this.queueToProcess = function() {

if (this.countInQueue > this.countInTraversal) { //an entity is available to move

var entity = this.entityQueue.pop();

this.countInQueue--;

this.processQueue.unshift(entity);

this.countInProcessQueue++;

this.countInProcess++;

var pTime = this.processTime[entityProcessTimeIndex(entity,this.processTimeSwitch)];

advance(pTime, this, "processComplete", entity);

//should be open now

if (this.exclusive) {

if (!this.openStatus) {

displayProgressText("Combined comp. " + this.componentID + " calls pull from previous at time " + globalSimClock.toFixed(6));

this.pullFromPrevious(); //TODO: call this with a modest (~1 time unit) delay to account for reaction time? //may or may not successfully get an entity but should always be called

}

};

this.traverseComplete = function() {

this.countInTraversal--; //TODO: ensure handled properly if traversal time is zero

//figure out which entity just finished traversing

var tempID = this.entityQueue[this.countInTraversal].entityID; //TODO: this works for FIFO, but not necessarily for other logics

//this.entityQueue[this.countInTraversal].setForwardAttemptTime(globalSimClock);

displayProgressText("Queue comp. " + this.componentID + " entity: " + tempID + " trav. at time " + globalSimClock.toFixed(6));

if (this.countInQueue - this.countInTraversal == 1) { //don't bother trying to forward unless this is the lead item in the queue

if (this.countInProcessQueue < this.processCapacity) { //is there space in the process queue

this.queueToProcess();

}

};

this.processComplete = function() {

this.countInProcess--;

//figure out which entity just finished processing

var tempID = this.processQueue[this.countInProcess].entityID; //TODO: this works for FIFO, but not necessarily for other logics

this.processQueue[this.countInProcess].setForwardAttemptTime(globalSimClock);

displayProgressText("Combined comp. " + this.componentID + " entity: " + tempID + " processed at " + globalSimClock.toFixed(6));

if (this.countInProcessQueue - this.countInProcess == 1) { //don't bother trying to forward unless this is the lead item in the queue

this.forwardEntity();

}

};

this.forwardEntity = function(destIndex) { //CombinedComponent

if (typeof destIndex === "undefined") {destIndex = -1;}

var dest = -1;

if (destIndex >= 0) { //pull request from a specific downstream component, must send entity there

if (this.routingMethod == 1) { //single connection, nothing to do

dest = 0;

} else if (this.routingMethod == 2) { //distribution, send to any request

dest = 0;

while ((this.nextComponentIDList[dest] != destIndex) && (dest < this.nextComponentCount)) { //second test should not be needed, loop can't fail to return valid result

dest++;

}

} else if (this.routingMethod == 3) { //model routing logic, TODO: don't forward if not desired destination

dest = 0;

while ((this.nextComponentIDList[dest] != destIndex) && (dest < this.nextComponentCount)) { //second test should not be needed, loop can't fail to return valid result

dest++;

}

dummy2 = 0;

} else {

if (this.routingMethod == 1) { //single connection

if (this.nextComponentList[0].isOpen()) {

dest = 0;

}

} else if (this.routingMethod == 2) { //distribution

var nextIndex = this.nextOpen();

if (nextIndex >= 0) {

dest = nextIndex;

//this.nextComponentIndex = dest;

}

} else if (this.routingMethod == 3) { //model routing logic

if (this.savedDestination >= 0) {

dest = this.savedDestination;

} else {

dest = 0;

var test = Math.random();

//need access to entity type but can't pop it off queue here

var index = this.countInQueue - 1;

if (index >= 0) {

index = entityDiversionPercentIndex(this.entityQueue[index]); //get head item in queue and find out what type it is

} else {

index = 0; //nothing in queue, following code will work but nothing will be popped and processed below

}

while (test > this.routingTable[index][dest]) {

dest++;

}

if (dest <= this.nextComponentCount) {

if (!this.nextComponentList[dest].isOpen()) {

dest = -1; //this works only because destinations are unique (i.e., can't send to multiple parallel types/processes, must send to a single queue feeding them)

}

} else {

alert("Queue comp. tried to assign destination with too high of an index")

}

if (dest >= 0) {

this.savedDestination = dest;

}

} else { //0 uninitialized or anything else

alert("comp. " + this.componentID + " incorrect routing method: " + this.routingMethod);

}

if (dest >= 0) {

if (this.countInProcessQueue > this.countInProcess) {

var entity = this.processQueue.pop(); //TODO-: are we testing to ensure the next entity is really available

//calculate how long item was in queue

this.exitResidenceTime = globalSimClock - entity.getLocalEntryTime();

//now use this to calculate stats for the interval

this.exitTime = globalSimClock;

this.exitEntityID = entity.entityID;

this.activity = "forward entity";

this.endExitDisplayTime = globalSimClock + this.displayDelay;

this.endAllDisplayTime = this.endExitDisplayTime;

advance(this.displayDelay, this, "clearExitDisplay");

displayProgressText("Combined comp. " + this.componentID + " forwards entity: " + this.exitEntityID + " at time " + globalSimClock.toFixed(6));

this.countInProcessQueue--;

this.queueToProcess();

this.isOpen();

this.nextComponentIndex = dest;

this.savedDestination = -1;

this.nextComponentList[dest].receiveEntity(entity);

//record stats

if (this.nextComponentList[dest].getComponentGroup() != entity.getComponentGroup()) { //truly leaving a component group along the current connection

recordGroupStatsWrapper(this.componentGroup, entity.getComponentGroupEntryTime(), entity);

}

};

this.receiveEntity = function(entity) { //CombinedComponent

//receive the entity

entity.setLocalEntryTime(); //record time entity entered queue

if (entity.getComponentGroup() != this.componentGroup) {

entity.setComponentGroup(this.componentGroup);

entity.setComponentGroupEntryTime(globalSimClock);

recordGroupStatsSystemEntryWrapper(this.componentGroup,entity);

}

entity.setForwardAttemptTime(Infinity);

entity.setPermission(false); //entity has reached end of related components group, permission no longer matters

this.entityQueue.unshift(entity);

this.countInQueue++;

this.countInTraversal++; //TODO: ensure handled properly if traversal time is zero

this.isOpen();

//display what was done

this.entryTime = globalSimClock;

this.entryEntityID = entity.entityID;

this.activity = "receive entity";

//set timer to clear the display after a bit

this.endEntryDisplayTime = globalSimClock + this.displayDelay;

this.endAllDisplayTime = this.endEntryDisplayTime;

advance(this.displayDelay, this, "clearEntryDisplay");

displayProgressText("Combined comp. " + this.componentID + " receives entity: " + this.entryEntityID + " at time " + globalSimClock.toFixed(6));

if (this.traversalTime > 0) {

//set timer for the new entity to track its traversal time

advance(this.traversalTime, this, "traverseComplete"); //TODO: don't bother if traversal time is zero, also insure countInTraversal is decremented (or not incremented) as needed

} else if (this.traversalTime == 0.0) {

this.traverseComplete();

}

};

this.activate = function(nextState) {

if (nextState == "clearEntryDisplay") {

this.clearEntryDisplay();

} else if (nextState == "clearExitDisplay") {

this.clearExitDisplay();

} else if (nextState == "traverseComplete") {

this.traverseComplete();

} else if (nextState == "processComplete") {

this.processComplete();

} else {

errorUndefinedAdvanceState(this.entityID, this.nextState);

}

}; //this.activate

} //CombinedComponent

I see numerous opportunities for compressing and streamlining things as I continue to work with this code. One of the insights is that any Queue or Process with a finite capacity is effectively exclusive, so I can probably automate the setting of that value for each component. That will be one of the things I work on tomorrow. I’m also thinking of modifying the way the entities are drawn in the various components. The current code works but is a bit twisty and opaque, so it could stand some clarification and regularizing.

I also fixed the 3D display mechanisms for the entities in the Bag and Combined components.

A Simple Discrete-Event Simulation: Part 77

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