Examples with TimeInstant desmoj.core.simulator.TimeInstant used on opensource projects

Example 6 with TimeInstant

use of desmoj.core.simulator.TimeInstant in project scylla by bptlab.

the class SimulationModel method doInitialSchedules.

@Override
public void doInitialSchedules() {
    TimeUnit timeUnit = DateTimeUtils.getReferenceTimeUnit();
    for (String processId : pSimMap.keySet()) {
        ProcessSimulationComponents desmojObj = pSimMap.get(processId);
        // schedule for end of simulation (if defined), aligned to global start time
        ZonedDateTime endDateOfSimulationConf = desmojObj.getSimulationConfiguration().getEndDateTime();
        Long endTimeRelativeToGlobalStart = Long.MAX_VALUE;
        if (endDateOfSimulationConf != null) {
            endTimeRelativeToGlobalStart = DateTimeUtils.getDuration(startDateTime, endDateOfSimulationConf);
            ProcessSimulationStopEvent endEvent = new ProcessSimulationStopEvent(this, processId, traceIsOn());
            // java.util.Date getTime() returns milliseconds
            endEvent.schedule(new TimeSpan(endTimeRelativeToGlobalStart, timeUnit));
        }
        // schedule for start of simulation, aligned to global start time
        ZonedDateTime startDateOfSimulationConf = desmojObj.getSimulationConfiguration().getStartDateTime();
        long startTimeRelativeToGlobalStart = DateTimeUtils.getDuration(startDateTime, startDateOfSimulationConf);
        ProcessModel processModel = desmojObj.getProcessModel();
        int processInstanceId = desmojObj.incrementProcessInstancesStarted();
        ProcessInstance firstProcessInstance = new ProcessInstance(this, processModel, processInstanceId, traceIsOn());
        ProcessInstanceGenerationEvent startEvent = new ProcessInstanceGenerationEvent(this, processId, endTimeRelativeToGlobalStart, traceIsOn());
        startEvent.schedule(firstProcessInstance, new TimeSpan(startTimeRelativeToGlobalStart, timeUnit));
    }
    if (endDateTime != null) {
        // / java.util.Date getTime() returns milliseconds
        long simulationDuration = DateTimeUtils.getDuration(startDateTime, endDateTime);
        TimeInstant timeInstant = new TimeInstant(simulationDuration, DateTimeUtils.getReferenceTimeUnit());
        for (String processId : pSimMap.keySet()) {
            ProcessSimulationStopEvent abortEvent = new ProcessSimulationStopEvent(this, processId, traceIsOn());
            abortEvent.schedule(timeInstant);
        }
    }
}

Example 7 with TimeInstant

use of desmoj.core.simulator.TimeInstant in project scylla by bptlab.

the class ProcessSimulationStopEvent method eventRoutine.

@Override
public void eventRoutine() throws SuspendExecution {
    SimulationModel model = (SimulationModel) getModel();
    Set<Integer> idsOfProcessInstancesToAbort = QueueManager.clearEventQueuesByProcessId(model, processId);
    try {
        ProcessSimulationStopEventPluggable.runPlugins(this);
        // we do not have any submodels
        boolean includeSubmodels = false;
        List<Entity> entities = model.getEntities(includeSubmodels);
        for (Entity entity : entities) {
            if (entity instanceof ProcessInstance) {
                ProcessInstance processInstance = (ProcessInstance) entity;
                if (processInstance.isScheduled() && processId.equals(processInstance.getProcessModel().getId())) {
                    processInstance.cancel();
                    idsOfProcessInstancesToAbort.add(processInstance.getId());
                }
            } else {
                DebugLogger.log("Found unsupported DesmoJ entity: " + entity.getName());
            }
        }
        for (Integer id : idsOfProcessInstancesToAbort) {
            DebugLogger.log("Abort process instance " + id + " of process " + processId + ".");
        }
        if (idsOfProcessInstancesToAbort.size() > 0) {
            DebugLogger.log("End time of process " + processId + " reached.");
        }
        if (model.getEndDateTime() != null) {
            long currentTime = model.presentTime().getTimeRounded(DateTimeUtils.getReferenceTimeUnit());
            long simulationEndTime = DateTimeUtils.getDuration(model.getStartDateTime(), model.getEndDateTime());
            if (simulationEndTime == currentTime) {
                model.getExperiment().stop(new TimeInstant(currentTime + 1));
            }
        }
    } catch (ScyllaRuntimeException e) {
        throw new RuntimeException(e);
    }
}

Example 8 with TimeInstant

use of desmoj.core.simulator.TimeInstant in project scylla by bptlab.

the class ResourceAvailabilityEvent method eventRoutine.

@Override
public void eventRoutine() throws SuspendExecution {
    SimulationModel model = (SimulationModel) getModel();
    TimeInstant currentSimulationTime = model.presentTime();
    Set<String> resourceQueuesUpdated = new HashSet<String>();
    String resourceType = resourceObject.getResourceType();
    resourceQueuesUpdated.add(resourceType);
    try {
        ScyllaEvent eventFromQueue = QueueManager.getEventFromQueueReadyForSchedule(model, resourceQueuesUpdated);
        while (eventFromQueue != null) {
            SimulationUtils.scheduleEvent(eventFromQueue, new TimeSpan(0));
            eventFromQueue = QueueManager.getEventFromQueueReadyForSchedule(model, resourceQueuesUpdated);
        }
        ResourceAvailabilityEventPluggable.runPlugins(this);
        // schedule next ResourceAvailableEvent
        ZonedDateTime currentDateTime = DateTimeUtils.getDateTime(currentSimulationTime);
        boolean currentlyInTimetableItem = true;
        SimulationUtils.scheduleNextResourceAvailableEvent(model, resourceObject, currentDateTime, currentlyInTimetableItem);
    } catch (ScyllaRuntimeException e) {
        throw new RuntimeException(e);
    }
}

Example 9 with TimeInstant

use of desmoj.core.simulator.TimeInstant in project scylla by bptlab.

the class SimulationUtils method createEventsForNextNode.

/**
 * Gets type of next node and prepare respective event.
 *
 * @param model
 *            the simulation model
 * @param processModel
 *            the process model
 * @param processInstanceId
 *            the identifier of the process instance
 * @param nextNodeId
 *            the identifier of the next node
 * @return the DesmoJ representing the next node plus DesmoJ events from plug-ins
 * @throws ScyllaRuntimeException
 * @throws NodeNotFoundException
 * @throws ScyllaValidationException
 */
public static List<ScyllaEvent> createEventsForNextNode(ScyllaEvent currentEvent, ProcessSimulationComponents desmojObjects, ProcessInstance processInstance, int nextNodeId) throws ScyllaRuntimeException, NodeNotFoundException, ScyllaValidationException {
    SimulationModel model = (SimulationModel) processInstance.getModel();
    TimeInstant currentSimulationTime = model.presentTime();
    ProcessModel processModel = processInstance.getProcessModel();
    String source = currentEvent.getSource();
    List<ScyllaEvent> events = new ArrayList<ScyllaEvent>();
    if (processModel.getTasks().containsKey(nextNodeId) || processModel.getSubProcesses().containsKey(nextNodeId)) {
        // TaskType tType = processModel.getTasks().get(nextNodeId);
        ScyllaEvent event = new TaskEnableEvent(model, source, currentSimulationTime, desmojObjects, processInstance, nextNodeId);
        events.add(event);
    } else if (processModel.getGateways().containsKey(nextNodeId)) {
        GatewayType gType = processModel.getGateways().get(nextNodeId);
        Set<Integer> idsOfNodesBeforeGateway = processModel.getIdsOfPreviousNodes(nextNodeId);
        if (gType == GatewayType.PARALLEL && idsOfNodesBeforeGateway.size() > 1) {
            Map<Integer, Set<Integer>> referenceToEventsOnHold = processInstance.getNodesAndTriggers();
            if (!referenceToEventsOnHold.containsKey(nextNodeId)) {
                referenceToEventsOnHold.put(nextNodeId, new HashSet<Integer>());
            }
            Set<Integer> nodesTriggeredFrom = referenceToEventsOnHold.get(nextNodeId);
            int currentNodeId = currentEvent.getNodeId();
            nodesTriggeredFrom.add(currentNodeId);
            if (idsOfNodesBeforeGateway.equals(nodesTriggeredFrom)) {
                ScyllaEvent event = new GatewayEvent(model, source, currentSimulationTime, desmojObjects, processInstance, nextNodeId);
                events.add(event);
                // clear list of fired incoming flows
                referenceToEventsOnHold.remove(nextNodeId);
            }
        } else {
            ScyllaEvent event = new GatewayEvent(model, source, currentSimulationTime, desmojObjects, processInstance, nextNodeId);
            events.add(event);
        }
    } else if (processModel.getEventTypes().containsKey(nextNodeId)) {
        EventType eType = processModel.getEventTypes().get(nextNodeId);
        if (eType == EventType.START) {
            throw new ScyllaRuntimeException("Start event " + nextNodeId + " must be at the beginning of the process.");
        } else if (eType == EventType.END) {
            ScyllaEvent event = new BPMNEndEvent(model, source, currentSimulationTime, desmojObjects, processInstance, nextNodeId);
            events.add(event);
        } else {
            ScyllaEvent event = new BPMNIntermediateEvent(model, source, currentSimulationTime, desmojObjects, processInstance, nextNodeId);
            events.add(event);
        }
    } else {
        throw new ScyllaRuntimeException("Next node " + nextNodeId + " not found or not supported.");
    }
    List<ScyllaEvent> eventsFromPlugins = EventCreationPluggable.runPlugins(currentEvent, desmojObjects, processInstance, nextNodeId);
    events.addAll(eventsFromPlugins);
    return events;
}

Example 10 with TimeInstant

use of desmoj.core.simulator.TimeInstant in project scylla by bptlab.

the class StatisticsLogger method writeToLog.

public void writeToLog(SimulationModel model, String outputPathWithoutExtension) throws IOException {
    TimeUnit timeUnit = DateTimeUtils.getReferenceTimeUnit();
    double totalEndTime = model.presentTime().getTimeAsDouble(timeUnit);
    Map<String, Map<Integer, List<ProcessNodeInfo>>> processNodeInfos = model.getProcessNodeInfos();
    Map<String, Map<String, List<ResourceInfo>>> resourceInfos = model.getResourceInfos();
    Set<ResourceObject> resourceObjectsSet = QueueManager.getAllResourceObjects(model);
    Map<String, Double> costPerResourceInstance = new HashMap<String, Double>();
    Map<String, Map<String, ResourceObject>> resourceObjects = new HashMap<String, Map<String, ResourceObject>>();
    for (ResourceObject res : resourceObjectsSet) {
        String resourceName = res.getResourceType() + "_" + res.getId();
        TimeUnit timeUnitOfResource = res.getTimeUnit();
        TimeUnit referenceUnit = DateTimeUtils.getReferenceTimeUnit();
        double cost = res.getCost();
        double costInReferenceUnit = DateTimeUtils.convertCost(timeUnitOfResource, referenceUnit, cost);
        costPerResourceInstance.put(resourceName, costInReferenceUnit);
        String resourceType = res.getResourceType();
        if (!resourceObjects.containsKey(resourceType)) {
            resourceObjects.put(resourceType, new HashMap<String, ResourceObject>());
        }
        String resourceId = res.getId();
        resourceObjects.get(resourceType).put(resourceId, res);
    }
    // resource utilization
    Map<String, Map<String, StatisticsResourceObject>> statsPerResource = new HashMap<String, Map<String, StatisticsResourceObject>>();
    // double totalEndTime = 0;
    for (String resourceType : resourceInfos.keySet()) {
        Map<String, StatisticsResourceObject> statsPerResourceInstance = new HashMap<String, StatisticsResourceObject>();
        Map<String, List<ResourceInfo>> resourceInfosOfType = resourceInfos.get(resourceType);
        for (String resourceId : resourceInfosOfType.keySet()) {
            long durationInUse = 0;
            long durationInUseIdle = 0;
            long currentTime = 0;
            List<ResourceInfo> infosOfResource = resourceInfosOfType.get(resourceId);
            ResourceStatus previousStatus = null;
            for (ResourceInfo info : infosOfResource) {
                ResourceStatus status = info.getTransition();
                long timestamp = info.getTimestamp();
                // FREE <-> IN_USE <-> IN_USE_IDLE
                if (status == ResourceStatus.IN_USE) {
                    if (previousStatus == ResourceStatus.IN_USE_IDLE) {
                        durationInUseIdle += timestamp - currentTime;
                    }
                } else if (status == ResourceStatus.FREE || status == ResourceStatus.IN_USE_IDLE) {
                    durationInUse += timestamp - currentTime;
                } else {
                    DebugLogger.log("Resource transition type not supported: " + status);
                }
                currentTime = timestamp;
            // if (currentTime > totalEndTime) {
            // totalEndTime = currentTime;
            // }
            }
            long durationAvailable = DateTimeUtils.getAvailabilityTime(resourceObjects.get(resourceType).get(resourceId).getTimetable(), new TimeInstant(totalEndTime));
            String resourceName = resourceType + "_" + resourceId;
            Double costPerUnit = costPerResourceInstance.get(resourceName);
            double costs = durationAvailable * costPerUnit;
            StatisticsResourceObject sro = new StatisticsResourceObject();
            sro.setDurationAvailable(durationAvailable);
            sro.setDurationInUse(durationInUse);
            // for total available time
            sro.setCosts(costs);
            sro.setDurationInUseIdle(durationInUseIdle);
            statsPerResourceInstance.put(resourceId, sro);
        }
        statsPerResource.put(resourceType, statsPerResourceInstance);
    }
    // process time with and without off-timetable hours (= idle time)
    // process waiting time
    // process costs
    // task duration
    // task waiting time
    Map<String, Map<Integer, StatisticsProcessInstanceObject>> statsPerProcess = new HashMap<String, Map<Integer, StatisticsProcessInstanceObject>>();
    Map<String, Map<String, Map<String, StatisticsTaskInstanceObject>>> statsPerTask = new HashMap<String, Map<String, Map<String, StatisticsTaskInstanceObject>>>();
    for (String processId : processNodeInfos.keySet()) {
        Map<Integer, StatisticsProcessInstanceObject> statsPerProcessInstance = new HashMap<Integer, StatisticsProcessInstanceObject>();
        Map<String, Map<String, StatisticsTaskInstanceObject>> statsPerTaskOfProcess = new HashMap<String, Map<String, StatisticsTaskInstanceObject>>();
        Map<Integer, List<ProcessNodeInfo>> nodeInfoOfProcessInstances = processNodeInfos.get(processId);
        for (int processInstanceId : nodeInfoOfProcessInstances.keySet()) {
            List<ProcessNodeInfo> nodeInfoList = nodeInfoOfProcessInstances.get(processInstanceId);
            long durationTotal = 0;
            long durationInactive = 0;
            long durationResourcesIdle = 0;
            long durationWaiting = 0;
            double costs = 0;
            Long previousTimestamp = null;
            long timeProcessStart = 0;
            Map<TaskInstanceIdentifier, Long> taskDurations = new HashMap<TaskInstanceIdentifier, Long>();
            Map<TaskInstanceIdentifier, Long> begunOrResumedTasks = new HashMap<TaskInstanceIdentifier, Long>();
            Map<TaskInstanceIdentifier, Long> enabledTasks = new HashMap<TaskInstanceIdentifier, Long>();
            Map<TaskInstanceIdentifier, Long> pausedTasks = new HashMap<TaskInstanceIdentifier, Long>();
            for (int i = 0; i < nodeInfoList.size(); i++) {
                String taskInstanceId = String.valueOf(i);
                long taskDurationEffective = 0;
                long taskDurationResourcesIdle = 0;
                long taskDurationWaiting = 0;
                double taskCosts = 0;
                ProcessNodeInfo ni = nodeInfoList.get(i);
                long timestamp = ni.getTimestamp();
                String processScopeNodeId = ni.getProcessScopeNodeId();
                String source = ni.getSource();
                TaskInstanceIdentifier taskInstanceIdentifier = new TaskInstanceIdentifier(processScopeNodeId, source);
                Set<String> resources = ni.getResources();
                String taskName = ni.getTaskName();
                StatisticsTaskInstanceObject stio = new StatisticsTaskInstanceObject(taskName);
                if (i == 0) {
                    previousTimestamp = timestamp;
                    timeProcessStart = timestamp;
                } else if (i == nodeInfoList.size() - 1) {
                    durationTotal = timestamp - timeProcessStart;
                }
                ProcessNodeTransitionType transition = ni.getTransition();
                if (begunOrResumedTasks.isEmpty()) {
                    durationInactive += timestamp - previousTimestamp;
                }
                if (transition == ProcessNodeTransitionType.ENABLE) {
                    enabledTasks.put(taskInstanceIdentifier, timestamp);
                } else if (transition == ProcessNodeTransitionType.BEGIN) {
                    Long enableTimestamp = enabledTasks.get(taskInstanceIdentifier);
                    if (enableTimestamp != null) {
                        long duration = timestamp - enableTimestamp;
                        durationWaiting += duration;
                        taskDurationWaiting += duration;
                        enabledTasks.remove(taskInstanceIdentifier);
                    }
                    taskDurations.put(taskInstanceIdentifier, 0L);
                    begunOrResumedTasks.put(taskInstanceIdentifier, timestamp);
                } else if (transition == ProcessNodeTransitionType.PAUSE) {
                    pausedTasks.put(taskInstanceIdentifier, timestamp);
                    Long beginOrResumeTimestamp = begunOrResumedTasks.get(taskInstanceIdentifier);
                    long duration = timestamp - beginOrResumeTimestamp;
                    for (String resourceName : resources) {
                        Double costPerUnit = costPerResourceInstance.get(resourceName);
                        costs += duration * costPerUnit;
                        taskCosts += duration * costPerUnit;
                    }
                    taskDurations.put(taskInstanceIdentifier, taskDurations.get(taskInstanceIdentifier) + duration);
                    begunOrResumedTasks.remove(taskInstanceIdentifier);
                } else if (transition == ProcessNodeTransitionType.RESUME) {
                    Long pauseTimestamp = pausedTasks.get(taskInstanceIdentifier);
                    long duration = timestamp - pauseTimestamp;
                    durationResourcesIdle += duration;
                    taskDurationResourcesIdle += duration;
                    pausedTasks.remove(taskInstanceIdentifier);
                    begunOrResumedTasks.put(taskInstanceIdentifier, timestamp);
                } else if (transition == ProcessNodeTransitionType.TERMINATE || transition == ProcessNodeTransitionType.CANCEL) {
                    Long beginOrResumeTimestamp = begunOrResumedTasks.get(taskInstanceIdentifier);
                    long duration = timestamp - beginOrResumeTimestamp;
                    for (String resourceName : resources) {
                        Double costPerUnit = costPerResourceInstance.get(resourceName);
                        costs += duration * costPerUnit;
                        taskCosts += duration * costPerUnit;
                    }
                    taskDurationEffective = taskDurations.get(taskInstanceIdentifier) + duration;
                    taskDurations.remove(taskInstanceIdentifier);
                    begunOrResumedTasks.remove(taskInstanceIdentifier);
                } else if (transition == ProcessNodeTransitionType.EVENT_BEGIN || transition == ProcessNodeTransitionType.EVENT_TERMINATE) {
                // not supported
                }
                stio.setDurationEffective(taskDurationEffective);
                stio.setDurationResourcesIdle(taskDurationResourcesIdle);
                stio.setDurationWaiting(taskDurationWaiting);
                stio.setCost(taskCosts);
                if (!statsPerTaskOfProcess.containsKey(processScopeNodeId)) {
                    statsPerTaskOfProcess.put(processScopeNodeId, new HashMap<String, StatisticsTaskInstanceObject>());
                }
                statsPerTaskOfProcess.get(processScopeNodeId).put(taskInstanceId, stio);
                previousTimestamp = ni.getTimestamp();
            }
            StatisticsProcessInstanceObject spio = new StatisticsProcessInstanceObject();
            spio.setDurationTotal(durationTotal);
            spio.setDurationInactive(durationInactive);
            spio.setDurationResourcesIdle(durationResourcesIdle);
            spio.setDurationWaiting(durationWaiting);
            spio.setCosts(costs);
            statsPerProcessInstance.put(processInstanceId, spio);
        }
        statsPerProcess.put(processId, statsPerProcessInstance);
        statsPerTask.put(processId, statsPerTaskOfProcess);
    }
    // build xml document
    Element resourceUtilization = new Element("resourceUtilization");
    Document doc = new Document(resourceUtilization);
    Element configuration = new Element("configuration");
    Element processes = new Element("processes");
    Element resources = new Element("resources");
    doc.getRootElement().addContent(configuration);
    doc.getRootElement().addContent(processes);
    doc.getRootElement().addContent(resources);
    configuration.addContent(new Element("time_unit").setText(String.valueOf(DateTimeUtils.getReferenceTimeUnit())));
    // add processes
    for (String processId : statsPerProcess.keySet()) {
        Map<Integer, StatisticsProcessInstanceObject> statsPerProcessInstance = statsPerProcess.get(processId);
        Element process = new Element("process");
        processes.addContent(process);
        process.addContent(new Element("id").setText(processId));
        Element processCost = new Element("cost");
        Element processTime = new Element("time");
        Element processInstances = new Element("instances");
        Element processActivities = new Element("activities");
        process.addContent(processCost);
        process.addContent(processTime);
        process.addContent(processInstances);
        process.addContent(processActivities);
        Element processFlowTime = new Element("flow_time");
        Element processEffectiveTime = new Element("effective");
        Element processWaitingTime = new Element("waiting");
        Element processOffTime = new Element("off_timetable");
        processTime.addContent(processFlowTime);
        processTime.addContent(processEffectiveTime);
        processTime.addContent(processWaitingTime);
        processTime.addContent(processOffTime);
        StatisticsCalculationObject costStats = new StatisticsCalculationObject();
        StatisticsCalculationObject flowTimeStats = new StatisticsCalculationObject();
        StatisticsCalculationObject effectiveStats = new StatisticsCalculationObject();
        StatisticsCalculationObject offTimeStats = new StatisticsCalculationObject();
        StatisticsCalculationObject waitingStats = new StatisticsCalculationObject();
        // add process instances
        for (Integer processInstanceId : statsPerProcessInstance.keySet()) {
            StatisticsProcessInstanceObject stats = statsPerProcessInstance.get(processInstanceId);
            long durationTotal = stats.getDurationTotal();
            long durationEffective = durationTotal - stats.getDurationInactive();
            long durationResourcesIdle = stats.getDurationResourcesIdle();
            long durationWaiting = stats.getDurationWaiting();
            double cost = stats.getCosts();
            Element instance = new Element("instance");
            processInstances.addContent(instance);
            instance.addContent(new Element("costs").setText(String.valueOf(cost)));
            Element instanceTime = new Element("time");
            instanceTime.addContent(new Element("duration").setText(String.valueOf(durationTotal)));
            instanceTime.addContent(new Element("effective").setText(String.valueOf(durationEffective)));
            instanceTime.addContent(new Element("waiting").setText(String.valueOf(durationWaiting)));
            instanceTime.addContent(new Element("offTime").setText(String.valueOf(durationResourcesIdle)));
            instance.addContent(instanceTime);
            costStats.addValue(cost);
            flowTimeStats.addValue(durationTotal);
            effectiveStats.addValue(durationEffective);
            offTimeStats.addValue(durationResourcesIdle);
            waitingStats.addValue(durationWaiting);
        }
        costStats.calculateStatistics();
        flowTimeStats.calculateStatistics();
        effectiveStats.calculateStatistics();
        waitingStats.calculateStatistics();
        offTimeStats.calculateStatistics();
        processCost.addContent(costStats.getStatsAsElements());
        processFlowTime.addContent(flowTimeStats.getStatsAsElements());
        processEffectiveTime.addContent(effectiveStats.getStatsAsElements());
        processWaitingTime.addContent(waitingStats.getStatsAsElements());
        processOffTime.addContent(offTimeStats.getStatsAsElements());
        Map<String, Map<String, StatisticsTaskInstanceObject>> statsPerTaskOfProcess = statsPerTask.get(processId);
        // add activities
        for (String processScopeNodeId : statsPerTaskOfProcess.keySet()) {
            long taskDuration = 0;
            for (StatisticsTaskInstanceObject instance : statsPerTaskOfProcess.get(processScopeNodeId).values()) {
                taskDuration += instance.getDurationEffective();
            }
            // skip tasks with zero duration (which are most likely events)
            if (taskDuration == 0)
                continue;
            StatisticsCalculationObject taskCostStats = new StatisticsCalculationObject();
            StatisticsCalculationObject taskDurationStats = new StatisticsCalculationObject();
            StatisticsCalculationObject taskWaitingStats = new StatisticsCalculationObject();
            StatisticsCalculationObject taskResourcesIdleStats = new StatisticsCalculationObject();
            Map<String, StatisticsTaskInstanceObject> statsPerTaskInstance = statsPerTaskOfProcess.get(processScopeNodeId);
            String taskName = "";
            Element activity = new Element("activity");
            processActivities.addContent(activity);
            activity.addContent(new Element("id").setText(processScopeNodeId));
            Element activityName = new Element("name");
            Element activityCost = new Element("cost");
            Element activityTime = new Element("time");
            Element activityInstances = new Element("instances");
            activity.addContent(activityName);
            activity.addContent(activityCost);
            activity.addContent(activityTime);
            activity.addContent(activityInstances);
            Element activityDurationTime = new Element("duration");
            Element activityWaitingTime = new Element("waiting");
            Element activityResourcesIdleTime = new Element("resources_idle");
            activityTime.addContent(activityDurationTime);
            activityTime.addContent(activityWaitingTime);
            activityTime.addContent(activityResourcesIdleTime);
            // add activity instances
            for (String taskInstanceId : statsPerTaskInstance.keySet()) {
                StatisticsTaskInstanceObject stats = statsPerTaskInstance.get(taskInstanceId);
                if (taskName.isEmpty()) {
                    taskName = stats.getTaskName();
                }
                long durationEffective = stats.getDurationEffective();
                long durationResourcesIdle = stats.getDurationResourcesIdle();
                long durationWaiting = stats.getDurationWaiting();
                double cost = stats.getCost();
                Element activityInstance = new Element("instance");
                activityInstances.addContent(activityInstance);
                activityInstance.addContent(new Element("cost").setText(String.valueOf(cost)));
                Element activityInstanceTime = new Element("time");
                activityInstanceTime.addContent(new Element("effective").setText(String.valueOf(durationEffective)));
                activityInstanceTime.addContent(new Element("waiting").setText(String.valueOf(durationWaiting)));
                activityInstanceTime.addContent(new Element("resources_idle").setText(String.valueOf(durationResourcesIdle)));
                activityInstance.addContent(activityInstanceTime);
                taskCostStats.addValue(cost);
                taskDurationStats.addValue(durationEffective);
                taskWaitingStats.addValue(durationWaiting);
                taskResourcesIdleStats.addValue(durationResourcesIdle);
            }
            activityName.setText(taskName);
            taskCostStats.calculateStatistics();
            taskDurationStats.calculateStatistics();
            taskWaitingStats.calculateStatistics();
            taskResourcesIdleStats.calculateStatistics();
            activityCost.addContent(taskCostStats.getStatsAsElements());
            activityDurationTime.addContent(taskDurationStats.getStatsAsElements());
            activityWaitingTime.addContent(taskWaitingStats.getStatsAsElements());
            activityResourcesIdleTime.addContent(taskResourcesIdleStats.getStatsAsElements());
        }
        // add resources
        for (String resourceType : statsPerResource.keySet()) {
            Map<String, StatisticsResourceObject> statsPerResourceInstance = statsPerResource.get(resourceType);
            Element resource = new Element("resource");
            resources.addContent(resource);
            resource.addContent(new Element("type").setText(resourceType));
            Element resourceCost = new Element("cost");
            Element resourceTime = new Element("time");
            Element resourceInstances = new Element("instances");
            resource.addContent(resourceCost);
            resource.addContent(resourceTime);
            resource.addContent(resourceInstances);
            Element resourceInUse = new Element("in_use");
            Element resourceAvailable = new Element("available");
            Element resourceWorkload = new Element("workload");
            resourceTime.addContent(resourceInUse);
            resourceTime.addContent(resourceAvailable);
            resourceTime.addContent(resourceWorkload);
            StatisticsCalculationObject resourceCostStats = new StatisticsCalculationObject();
            StatisticsCalculationObject resourceInUseStats = new StatisticsCalculationObject();
            StatisticsCalculationObject resourceAvailableStats = new StatisticsCalculationObject();
            StatisticsCalculationObject resourceWorkloadStats = new StatisticsCalculationObject();
            // add resource instances
            for (String resourceId : statsPerResourceInstance.keySet()) {
                StatisticsResourceObject stats = statsPerResourceInstance.get(resourceId);
                long durationInUse = stats.getDurationInUse();
                long durationAvailable = stats.getDurationAvailable();
                double percentageInUse = durationInUse / (double) durationAvailable;
                double cost = stats.getCosts();
                Element resourceInstance = new Element("instance");
                resourceInstances.addContent(resourceInstance);
                resourceInstance.addContent(new Element("id").setText(resourceId));
                resourceInstance.addContent(new Element("cost").setText(String.valueOf(cost)));
                Element resourceInstanceTime = new Element("time");
                resourceInstanceTime.addContent(new Element("in_use").setText(String.valueOf(durationInUse)));
                resourceInstanceTime.addContent(new Element("available").setText(String.valueOf(durationAvailable)));
                resourceInstanceTime.addContent(new Element("workload").setText(String.valueOf(percentageInUse)));
                resourceInstance.addContent(resourceInstanceTime);
                resourceCostStats.addValue(cost);
                resourceInUseStats.addValue(durationInUse);
                resourceAvailableStats.addValue(durationAvailable);
                resourceWorkloadStats.addValue(percentageInUse);
            }
            resourceCostStats.calculateStatistics();
            resourceInUseStats.calculateStatistics();
            resourceAvailableStats.calculateStatistics();
            resourceWorkloadStats.calculateStatistics();
            resourceCost.addContent(resourceCostStats.getStatsAsElements());
            resourceInUse.addContent(resourceInUseStats.getStatsAsElements());
            resourceAvailable.addContent(resourceAvailableStats.getStatsAsElements());
            resourceWorkload.addContent(resourceWorkloadStats.getStatsAsElements());
        }
    }
    // print
    String resourceUtilizationFileName = outputPathWithoutExtension + model.getGlobalConfiguration().getFileNameWithoutExtension() + "_resourceutilization.xml";
    FileOutputStream fos = new FileOutputStream(resourceUtilizationFileName);
    XMLOutputter xmlOutput = new XMLOutputter();
    xmlOutput.output(doc, fos);
}