Examples with Branch org.palladiosimulator.pcm.usagemodel.Branch used on opensource projects

Example 1 with Branch

use of org.palladiosimulator.pcm.usagemodel.Branch in project iobserve-analysis by research-iobserve.

the class LoopWithinBranchReference method getModel.

/**
 * It creates a reference usage model that contains loops within branches. Accordingly, user
 * sessions whose call sequences differ from each other at the positions of the branches and
 * that contain iterated call sequences are created.(RQ-1.6)
 *
 * @param referenceUsageModelFileName
 *            file name of the reference model to store its result
 * @param repositoryLookupModel
 *            repository lookup model
 * @param correspondenceModel
 *            correspondence model
 *
 * @return a reference model and corresponding user sessions
 * @throws IOException
 *             on error
 */
public static ReferenceElements getModel(final String referenceUsageModelFileName, final RepositoryLookupModelProvider repositoryLookupModel, final ICorrespondence correspondenceModel) throws IOException {
    // Create a random number of user sessions and random model element parameters. The user
    // sessions' behavior will be created according to the reference usage model and
    // subsequently the user sessions are used to create a usage model. The created usage model
    // is matched against the reference usage model. The minimum number of user sessions is set
    // dependently from the random number of branch transitions, because it must be ensured that
    // each branch transition is represented within the user sessions.
    final int numberOfBranchTransitions = TestHelper.getRandomInteger(3, 2);
    final int numberOfConcurrentUsers = TestHelper.getRandomInteger(30, 10 * numberOfBranchTransitions);
    final int lengthOfBranchSequence = TestHelper.getRandomInteger(2, 1);
    final int countOfLoop = TestHelper.getRandomInteger(3, 2);
    final EntryCallSequenceModel entryCallSequenceModel = new EntryCallSequenceModel(TestHelper.getUserSessions(numberOfConcurrentUsers));
    final ReferenceElements referenceElements = new ReferenceElements();
    // In the following the reference usage model is created
    final UsageModel usageModel = UsageModelFactory.createUsageModel();
    final UsageScenario usageScenario = UsageModelFactory.createUsageScenario("", usageModel);
    final ScenarioBehaviour scenarioBehaviour = usageScenario.getScenarioBehaviour_UsageScenario();
    // lastAction = start;
    final Branch branch = LoopWithinBranchReference.createBranch(repositoryLookupModel, scenarioBehaviour, correspondenceModel, numberOfBranchTransitions, lengthOfBranchSequence, countOfLoop);
    // According to the reference usage model user sessions are created that exactly represent
    // the user behavior of the reference usage model. The entry and exit times enable that the
    // calls within the user sessions are ordered according to the reference usage model. The
    // branch transition counter ensures that each branch transition is represnted within the
    // user sessions
    final List<Integer> branchTransitionCounter = new ArrayList<>();
    boolean areAllBranchesVisited = true;
    do {
        for (int i = 0; i < branch.getBranchTransitions_Branch().size(); i++) {
            branchTransitionCounter.add(i, 0);
        }
        int entryTime = 1;
        for (int i = 0; i < entryCallSequenceModel.getUserSessions().size(); i++) {
            entryTime = 1;
            // Each user session represents one of the branch transitions
            final int branchDecisioner = TestHelper.getRandomInteger(numberOfBranchTransitions - 1, 0);
            if (branchDecisioner == 0) {
                entryTime = LoopWithinBranchReference.createLoop(branchTransitionCounter, entryTime, 0, 1, entryCallSequenceModel, lengthOfBranchSequence, countOfLoop, i);
            } else if (branchDecisioner == 1) {
                entryTime = LoopWithinBranchReference.createLoop(branchTransitionCounter, entryTime, 1, 2, entryCallSequenceModel, lengthOfBranchSequence, countOfLoop, i);
            } else if (branchDecisioner == 2) {
                entryTime = LoopWithinBranchReference.createLoop(branchTransitionCounter, entryTime, 2, 0, entryCallSequenceModel, lengthOfBranchSequence, countOfLoop, i);
            }
        }
        // It is checked whether all branch transitions are represented within the user sessions
        for (int i = 0; i < branchTransitionCounter.size(); i++) {
            if (branchTransitionCounter.get(i) == 0) {
                areAllBranchesVisited = false;
                break;
            }
        }
    } while (!areAllBranchesVisited);
    // Sets the likelihoods of the branch transitions according to the created user sessions
    for (int i = 0; i < branch.getBranchTransitions_Branch().size(); i++) {
        branch.getBranchTransitions_Branch().get(i).setBranchProbability((double) branchTransitionCounter.get(i) / (double) numberOfConcurrentUsers);
    }
    // Saves the reference usage model and sets the usage model and the EntryCallSequenceModel
    // as the reference elements. Our approach is now executed with the EntryCallSequenceModel
    // and the resulting usage model can be matched against the reference usage model
    TestHelper.saveModel(usageModel, referenceUsageModelFileName);
    referenceElements.setEntryCallSequenceModel(entryCallSequenceModel);
    referenceElements.setUsageModel(usageModel);
    return referenceElements;
}

Example 2 with Branch

use of org.palladiosimulator.pcm.usagemodel.Branch in project iobserve-analysis by research-iobserve.

the class LoopWithinBranchReference method createBranch.

/**
 * Creates a branch and branch transitions according to the random countOfBranchTransitions.
 *
 * @param scenarioBehaviour
 * @param repositoryLookupModel
 * @param correspondenceModel
 * @param numberOfBranchTransitions
 * @param lengthOfBranchSequence
 * @param countOfLoop
 * @return
 */
private static Branch createBranch(final RepositoryLookupModelProvider repositoryLookupModel, final ScenarioBehaviour scenarioBehaviour, final ICorrespondence correspondenceModel, final int numberOfBranchTransitions, final int lengthOfBranchSequence, final int countOfLoop) {
    final Start start = UsageModelFactory.createAddStartAction("", scenarioBehaviour);
    final Branch branch = UsageModelFactory.createBranch("", scenarioBehaviour);
    final Stop stop = UsageModelFactory.createAddStopAction("", scenarioBehaviour);
    UsageModelFactory.connect(start, branch);
    UsageModelFactory.connect(branch, stop);
    AbstractUserAction lastAction = start;
    // For each branch transition its calls are added to the branch transition
    for (int i = 0; i < numberOfBranchTransitions; i++) {
        final BranchTransition branchTransition = UsageModelFactory.createBranchTransition(branch);
        final ScenarioBehaviour branchTransitionBehaviour = branchTransition.getBranchedBehaviour_BranchTransition();
        final Start startBranchTransition = UsageModelFactory.createStart("");
        UsageModelFactory.addUserAction(branchTransitionBehaviour, startBranchTransition);
        final Stop stopBranchTransition = UsageModelFactory.createStop("");
        UsageModelFactory.addUserAction(branchTransitionBehaviour, stopBranchTransition);
        lastAction = startBranchTransition;
        if (i >= 0 && i < 3) {
            final Optional<Correspondent> optionCorrespondent = correspondenceModel.getCorrespondent(ReferenceUsageModelBuilder.CLASS_SIGNATURE[i], ReferenceUsageModelBuilder.OPERATION_SIGNATURE[i]);
            if (optionCorrespondent.isPresent()) {
                final Correspondent correspondent = optionCorrespondent.get();
                final EntryLevelSystemCall entryLevelSystemCall = UsageModelFactory.createEntryLevelSystemCall(repositoryLookupModel, correspondent);
                UsageModelFactory.addUserAction(branchTransitionBehaviour, entryLevelSystemCall);
                UsageModelFactory.connect(lastAction, entryLevelSystemCall);
                lastAction = entryLevelSystemCall;
            }
        } else {
            throw new IllegalArgumentException("Illegal value of model element parameter");
        }
        if (lengthOfBranchSequence == 2) {
            final Optional<Correspondent> optionCorrespondent = correspondenceModel.getCorrespondent(ReferenceUsageModelBuilder.CLASS_SIGNATURE[4], ReferenceUsageModelBuilder.OPERATION_SIGNATURE[4]);
            if (optionCorrespondent.isPresent()) {
                final Correspondent correspondent = optionCorrespondent.get();
                final EntryLevelSystemCall entryLevelSystemCall = UsageModelFactory.createEntryLevelSystemCall(repositoryLookupModel, correspondent);
                UsageModelFactory.addUserAction(branchTransitionBehaviour, entryLevelSystemCall);
                UsageModelFactory.connect(lastAction, entryLevelSystemCall);
                lastAction = entryLevelSystemCall;
            }
        }
        // Within the branch transition a loop element is created
        final Loop loop = UsageModelFactory.createLoop("", branchTransitionBehaviour);
        UsageModelFactory.connect(lastAction, loop);
        final PCMRandomVariable pcmLoop2Iteration = CoreFactory.eINSTANCE.createPCMRandomVariable();
        pcmLoop2Iteration.setSpecification(String.valueOf(countOfLoop));
        loop.setLoopIteration_Loop(pcmLoop2Iteration);
        final Start loopStart = UsageModelFactory.createStart("");
        UsageModelFactory.addUserAction(loop.getBodyBehaviour_Loop(), loopStart);
        final Stop loopStop = UsageModelFactory.createStop("");
        UsageModelFactory.addUserAction(loop.getBodyBehaviour_Loop(), loopStop);
        lastAction = loopStart;
        // The calls that are iterated are added to the loop
        final Optional<Correspondent> optionCorrespondent;
        switch(i) {
            case 0:
                optionCorrespondent = correspondenceModel.getCorrespondent(ReferenceUsageModelBuilder.CLASS_SIGNATURE[1], ReferenceUsageModelBuilder.OPERATION_SIGNATURE[1]);
                break;
            case 1:
                optionCorrespondent = correspondenceModel.getCorrespondent(ReferenceUsageModelBuilder.CLASS_SIGNATURE[2], ReferenceUsageModelBuilder.OPERATION_SIGNATURE[2]);
                break;
            case 2:
                optionCorrespondent = correspondenceModel.getCorrespondent(ReferenceUsageModelBuilder.CLASS_SIGNATURE[0], ReferenceUsageModelBuilder.OPERATION_SIGNATURE[0]);
                break;
            default:
                throw new IllegalArgumentException("Illegal value of model element parameter");
        }
        if (optionCorrespondent.isPresent()) {
            final Correspondent correspondent = optionCorrespondent.get();
            final EntryLevelSystemCall entryLevelSystemCall = UsageModelFactory.createEntryLevelSystemCall(repositoryLookupModel, correspondent);
            UsageModelFactory.addUserAction(loop.getBodyBehaviour_Loop(), entryLevelSystemCall);
            UsageModelFactory.connect(lastAction, entryLevelSystemCall);
            lastAction = entryLevelSystemCall;
        }
        UsageModelFactory.connect(lastAction, loopStop);
        UsageModelFactory.connect(loop, stopBranchTransition);
    }
    return branch;
}

Example 3 with Branch

use of org.palladiosimulator.pcm.usagemodel.Branch in project iobserve-analysis by research-iobserve.

the class UserBehaviorEvaluation method getModelElements.

/**
 * Extracts for a scenario behavior the model elements.
 *
 * @param scenarioBehaviour
 *            whose model elements are extracted
 * @param modelElements
 *            the list to that the model elements are added
 */
private static void getModelElements(final ScenarioBehaviour scenarioBehaviour, final List<ModelElement> modelElements) {
    final List<AbstractUserAction> actionsOfScenarioBehaviour = scenarioBehaviour.getActions_ScenarioBehaviour();
    AbstractUserAction nextActionOfScenarioBehaviour = actionsOfScenarioBehaviour.get(0);
    // element
    while (nextActionOfScenarioBehaviour != null) {
        if (nextActionOfScenarioBehaviour.getClass().equals(StartImpl.class)) {
            final ModelElement modelElement = new ModelElement(true, false, false, false, false, "", "", 0);
            modelElements.add(modelElement);
        } else if (nextActionOfScenarioBehaviour.getClass().equals(StopImpl.class)) {
            final ModelElement modelElement = new ModelElement(false, true, false, false, false, "", "", 0);
            modelElements.add(modelElement);
        } else if (nextActionOfScenarioBehaviour.getClass().equals(EntryLevelSystemCallImpl.class)) {
            final EntryLevelSystemCall call = (EntryLevelSystemCall) nextActionOfScenarioBehaviour;
            final ModelElement modelElement = new ModelElement(false, false, true, false, false, call.getEntityName(), "", 0);
            modelElements.add(modelElement);
        } else if (nextActionOfScenarioBehaviour.getClass().equals(LoopImpl.class)) {
            final Loop loop = (Loop) nextActionOfScenarioBehaviour;
            final ModelElement modelElement = new ModelElement(false, false, false, false, true, "", loop.getLoopIteration_Loop().getSpecification(), 0);
            modelElements.add(modelElement);
            UserBehaviorEvaluation.getModelElements(loop.getBodyBehaviour_Loop(), modelElements);
        } else if (nextActionOfScenarioBehaviour.getClass().equals(BranchImpl.class)) {
            final Branch branch = (Branch) nextActionOfScenarioBehaviour;
            // Because the branch transitions of the usage models are not always in the same
            // order, we order the branch transitions by the entity name of their first
            // EntryLevelSystemCall. In doing so, the model elements of each usage model are
            // added in the same order independently of the ordering of the usage model. The
            // ordering of the branch transitions does not affect the accuracy of an usage model
            // and is created randomly within the usage model and can not be influenced.
            final List<BranchTransition> branchTransitionsSorted = UserBehaviorEvaluation.sortBranchTransitions(branch.getBranchTransitions_Branch());
            for (int i = 0; i < branchTransitionsSorted.size(); i++) {
                final ModelElement modelElement = new ModelElement(false, false, false, true, false, "", "", branchTransitionsSorted.get(i).getBranchProbability());
                modelElements.add(modelElement);
                UserBehaviorEvaluation.getModelElements(branchTransitionsSorted.get(i).getBranchedBehaviour_BranchTransition(), modelElements);
            }
        }
        // Gets the successor model element
        nextActionOfScenarioBehaviour = nextActionOfScenarioBehaviour.getSuccessor();
    }
}

Example 4 with Branch

use of org.palladiosimulator.pcm.usagemodel.Branch in project iobserve-analysis by research-iobserve.

the class TUsageModelToBehaviorModel method findLoopStart.

/**
 * Find first {@link EntryLevelSystemCall} element of a {@link Loop} body.
 *
 * @param loop
 *            loop
 * @return first found {@link EntryLevelSystemCall}, if found
 */
private Optional<EntryCallNode> findLoopStart(final AbstractUserAction action) {
    if (action instanceof Stop) {
        // LoopStart not found
        return Optional.empty();
    } else if (action instanceof EntryLevelSystemCall) {
        // found loop start
        final EntryLevelSystemCall entryLevelSystemCall = (EntryLevelSystemCall) action;
        final EntryCallNode entryCallNode = this.createEntryCallNode(entryLevelSystemCall);
        return Optional.of(entryCallNode);
    } else if (action instanceof Loop) {
        // search nested scenario
        final Loop loop = (Loop) action;
        final List<AbstractUserAction> userActions = loop.getBodyBehaviour_Loop().getActions_ScenarioBehaviour();
        if (userActions.size() > 0) {
            return this.findLoopStart(userActions.get(0));
        } else {
            return Optional.empty();
        }
    } else if (action instanceof Branch) {
        // will always found before
        return Optional.empty();
    } else {
        // next action
        return this.findLoopStart(action.getSuccessor());
    }
}

Example 5 with Branch

use of org.palladiosimulator.pcm.usagemodel.Branch in project iobserve-analysis by research-iobserve.

the class TUsageModelToBehaviorModel method traverseBranch.

private Map<EntryCallNode, Double> traverseBranch(final BehaviorModel behaviorModel, final Optional<Map<EntryCallNode, Double>> optPreviousNodes, final Branch branch) {
    // assign new probabilities to the nodes
    final Map<BranchTransition, Map<EntryCallNode, Double>> transitionMap = new HashMap<>();
    for (final BranchTransition transition : branch.getBranchTransitions_Branch()) {
        final Map<EntryCallNode, Double> branchMap = new HashMap<>();
        optPreviousNodes.ifPresent(previousNodes -> previousNodes.keySet().stream().forEach(node -> branchMap.put(node, transition.getBranchProbability())));
        transitionMap.put(transition, branchMap);
    }
    // traverse all branches and collect the end nodes
    final Map<EntryCallNode, Double> endNodes = branch.getBranchTransitions_Branch().stream().map(transition -> this.traverseScenarioBehavior(transition.getBranchedBehaviour_BranchTransition(), behaviorModel, // all
    Optional.of(transitionMap.get(transition)))).collect(HashMap::new, Map::putAll, // collect endNodes
    Map::putAll);
    return endNodes;
}