Examples with ReferenceElements org.iobserve.analysis.userbehavior.ReferenceElements used on opensource projects

Example 1 with ReferenceElements

use of org.iobserve.analysis.userbehavior.ReferenceElements in project iobserve-analysis by research-iobserve.

the class SimpleSequenceReference method getModel.

/**
 * Creates a reference model that contains a simple sequence of calls. Accordingly, user
 * sessions whose call sequences contain a simple call sequence are created. (RQ-1.1) It is also
 * used to evaluate the accuracy of workload specifications. Therefore, varying workload is
 * generated by random entry and exit times of the user sessions, a random number of user
 * sessions for a closed workload specification and a random mean inter arrival time for an open
 * workload specification (RQ-1.9)
 *
 * @param referenceUsageModelFileName
 *            file name of the reference model to store its result
 * @param repositoryLookupModel
 *            repository lookup model
 * @param correspondenceModel
 *            correspondence model
 * @param thinkTime
 *            of a closed workload.
 * @param isClosedWorkload
 *            decides whether a closed or an open workload is created
 * @return the reference usage model, a corresponding EntryCallSequenceModel and a reference
 *         workload
 * @throws IOException
 *             on error
 */
public static ReferenceElements getModel(final String referenceUsageModelFileName, final RepositoryLookupModelProvider repositoryLookupModel, final ICorrespondence correspondenceModel, final int thinkTime, final boolean isClosedWorkload) throws IOException {
    // Creates 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.
    final int numberOfUsersSessions = TestHelper.getRandomInteger(200, 1);
    final int numberOfCalls = TestHelper.getRandomInteger(5, 1);
    final EntryCallSequenceModel entryCallSequenceModel = new EntryCallSequenceModel(TestHelper.getUserSessions(numberOfUsersSessions));
    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();
    final Start start = UsageModelFactory.createAddStartAction("", scenarioBehaviour);
    final Stop stop = UsageModelFactory.createAddStopAction("", scenarioBehaviour);
    AbstractUserAction lastAction = start;
    Optional<Correspondent> correspondent;
    // created
    for (int i = 0; i < numberOfCalls; i++) {
        if (i >= 0 && i < 5) {
            correspondent = correspondenceModel.getCorrespondent(ReferenceUsageModelBuilder.CLASS_SIGNATURE[i], ReferenceUsageModelBuilder.OPERATION_SIGNATURE[i]);
        } else {
            throw new IllegalArgumentException("Illegal value of model element parameter");
        }
        if (correspondent.isPresent()) {
            final EntryLevelSystemCall entryLevelSystemCall = UsageModelFactory.createEntryLevelSystemCall(repositoryLookupModel, correspondent.get());
            UsageModelFactory.addUserAction(scenarioBehaviour, entryLevelSystemCall);
            UsageModelFactory.connect(lastAction, entryLevelSystemCall);
            lastAction = entryLevelSystemCall;
        }
    }
    UsageModelFactory.connect(lastAction, stop);
    // 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 are set randomly
    // to evaluate a closed workload. For the evaluation of an open workload the mean inter
    // arrival time is set randomly
    int entryTime = 0;
    int exitTime = 1;
    final int meanInterArrivalTime = TestHelper.getRandomInteger(30, 1);
    for (int i = 0; i < entryCallSequenceModel.getUserSessions().size(); i++) {
        if (isClosedWorkload) {
            entryTime = TestHelper.getRandomInteger(30, 1);
            exitTime = entryTime + 1;
        } else {
            entryTime += meanInterArrivalTime;
            exitTime += meanInterArrivalTime;
        }
        for (int k = 0; k < numberOfCalls; k++) {
            EntryCallEvent entryCallEvent = null;
            if (k >= 0 && k < 5) {
                entryCallEvent = new EntryCallEvent(entryTime, exitTime, ReferenceUsageModelBuilder.OPERATION_SIGNATURE[k], ReferenceUsageModelBuilder.CLASS_SIGNATURE[k], String.valueOf(i), "hostname");
            } else {
                throw new IllegalArgumentException("Illegal value of model element parameter");
            }
            entryCallSequenceModel.getUserSessions().get(i).add(entryCallEvent, true);
            entryTime = entryTime + 2;
            exitTime = exitTime + 2;
        }
    }
    // Saves the reference usage model and sets the usage model, the EntryCallSequenceModel
    // and the workload 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. Alike, the by our approach calculated workload can be matched against the
    // reference workload. This is done by {@link
    // org.iobserve.analysis.userbehavior.test.WorkloadEvaluation}
    TestHelper.saveModel(usageModel, referenceUsageModelFileName);
    referenceElements.setEntryCallSequenceModel(entryCallSequenceModel);
    referenceElements.setUsageModel(usageModel);
    referenceElements.setMeanInterArrivalTime(meanInterArrivalTime + numberOfCalls * 2);
    referenceElements.setMeanConcurrentUserSessions(SimpleSequenceReference.calculateTheNumberOfConcurrentUsers(entryCallSequenceModel.getUserSessions()));
    return referenceElements;
}

Example 2 with ReferenceElements

use of org.iobserve.analysis.userbehavior.ReferenceElements in project iobserve-analysis by research-iobserve.

the class BranchWithinBranchReference method getModel.

/**
 * It creates a reference usage model that contains nested branches. Accordingly, user sessions
 * whose call sequences differ from each other at the positions of the branches are
 * created.(RQ-1.5)
 *
 * @param referenceUsageModelFileName
 *            file name of the reference model to store its result
 * @param usageModelBuilder
 *            usage model builder
 * @param repositoryLookupModel
 *            repository model provider
 * @param correspondenceModel
 *            correspondence model
 *
 * @return a reference usage model and corresponding user sessions
 * @throws IOException
 *             on error
 */
public static ReferenceElements getModel(final String referenceUsageModelFileName, final UsageModelFactory usageModelBuilder, 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 numberOfTransitionsOfExteriorBranch = TestHelper.getRandomInteger(3, 2);
    final int numberOfTransitionsOfInteriorBranches = TestHelper.getRandomInteger(3, 2);
    final int numberOfConcurrentUsers = TestHelper.getRandomInteger(200, 10 * numberOfTransitionsOfExteriorBranch);
    final EntryCallSequenceModel entryCallSequenceModel = new EntryCallSequenceModel(TestHelper.getUserSessions(numberOfConcurrentUsers));
    final ReferenceElements referenceElements = new ReferenceElements();
    final List<Integer> branchTransitionCounter = new ArrayList<>();
    final List<List<Integer>> listOfbranchTransitionCounterInterior = new ArrayList<>();
    BranchWithinBranchReference.createUserSessions(branchTransitionCounter, listOfbranchTransitionCounterInterior, numberOfTransitionsOfExteriorBranch, numberOfTransitionsOfInteriorBranches, entryCallSequenceModel);
    final UsageModel usageModel = BranchWithinBranchReference.createTheReferenceModel(usageModelBuilder, repositoryLookupModel, correspondenceModel, numberOfTransitionsOfExteriorBranch, numberOfTransitionsOfInteriorBranches, numberOfConcurrentUsers, branchTransitionCounter, listOfbranchTransitionCounterInterior);
    // 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 3 with ReferenceElements

use of org.iobserve.analysis.userbehavior.ReferenceElements 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 4 with ReferenceElements

use of org.iobserve.analysis.userbehavior.ReferenceElements in project iobserve-analysis by research-iobserve.

the class SimpleBranchReference method saveReferenceElements.

/**
 * 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
 *
 * @param usageModel
 *            usage model
 * @param referenceModelFileName
 *            reference model file name
 * @param entryCallSequenceModel
 *            entry call sequence model
 *
 * @return reference elements
 * @throws IOException
 *             when the file is written
 */
private static ReferenceElements saveReferenceElements(final UsageModel usageModel, final String referenceModelFileName, final EntryCallSequenceModel entryCallSequenceModel) throws IOException {
    final ReferenceElements referenceElements = new ReferenceElements();
    TestHelper.saveModel(usageModel, referenceModelFileName);
    referenceElements.setEntryCallSequenceModel(entryCallSequenceModel);
    referenceElements.setUsageModel(usageModel);
    return referenceElements;
}

Example 5 with ReferenceElements

use of org.iobserve.analysis.userbehavior.ReferenceElements in project iobserve-analysis by research-iobserve.

the class BranchWithinLoopReference method getModel.

/**
 * It creates a reference usage model that contains branches within loops. Accordingly, user
 * sessions whose call sequences differ from each other are iterated in a row. Thereby, at each
 * iteration of a branched call sequences the probabilities have to be equal because otherwise
 * it would not be an iteration (RQ-1.8)
 *
 * @param referenceUsageModelFileName
 *            reference usage model file name
 * @param repositoryLookupModel
 *            repository model builder
 * @param correspondenceModel
 *            correspondence model
 *
 * @return reference usage model and corresponding user sessions
 * @throws IOException
 *             on error
 */
public static ReferenceElements getModel(final String referenceUsageModelFileName, final RepositoryLookupModelProvider repositoryLookupModel, final ICorrespondence correspondenceModel) throws IOException {
    // The number of model element parameters are created randomly. The number of user sessions
    // must be created accordingly to the number of branch transitions, because it must be
    // ensured that at each iteration of an branch the branch transition probabilities are
    // equal. This can be achieved by the same number of user sessions representing the branch
    // transition at each iteration
    final int numberOfLoops = TestHelper.getRandomInteger(3, 3);
    final int numberOfConcurrentUsers = (int) Math.pow(2, numberOfLoops) * 5;
    final EntryCallSequenceModel entryCallSequenceModel = new EntryCallSequenceModel(TestHelper.getUserSessions(numberOfConcurrentUsers));
    final ReferenceElements testElements = 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();
    final Start start = UsageModelFactory.createAddStartAction("", scenarioBehaviour);
    final Stop stop = UsageModelFactory.createAddStopAction("", scenarioBehaviour);
    final AbstractUserAction lastAction = start;
    // The loop element is created that contains the iterated branch
    final Loop loop = UsageModelFactory.createLoop("", scenarioBehaviour);
    final ScenarioBehaviour loopScenarioBehaviour = loop.getBodyBehaviour_Loop();
    UsageModelFactory.connect(lastAction, loop);
    final PCMRandomVariable pcmLoopIteration = CoreFactory.eINSTANCE.createPCMRandomVariable();
    pcmLoopIteration.setSpecification(String.valueOf(numberOfLoops));
    // Set number of loops
    loop.setLoopIteration_Loop(pcmLoopIteration);
    UsageModelFactory.connect(loop, stop);
    final Start loopStart = UsageModelFactory.createAddStartAction("", loopScenarioBehaviour);
    final Stop loopStop = UsageModelFactory.createAddStopAction("", loopScenarioBehaviour);
    // The branch that is contained within the loop element is created
    final org.palladiosimulator.pcm.usagemodel.Branch branch = UsageModelFactory.createBranch("", loopScenarioBehaviour);
    UsageModelFactory.connect(loopStart, branch);
    // The branch transition 1 is created
    final BranchTransition branchTransition1 = BranchWithinLoopReference.createBranchTransition(2, repositoryLookupModel, branch, correspondenceModel);
    // The branch transition 2 is created
    final BranchTransition branchTransition2 = BranchWithinLoopReference.createBranchTransition(3, repositoryLookupModel, branch, correspondenceModel);
    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(loopScenarioBehaviour, entryLevelSystemCall);
        UsageModelFactory.connect(branch, entryLevelSystemCall);
        UsageModelFactory.connect(entryLevelSystemCall, loopStop);
    }
    // User sessions according to the reference usage model are created. Thereby, it must be
    // ensured that each iteration of the branch the branch probabilities stay the same because
    // the branch is iterated. This can be achieved by an equal number of user sessions for each
    // branch transition at each iteration of the branch
    int countOfCallEvent3 = 0;
    int countOfCallEvent4 = 0;
    int entryTime = 1;
    int exitTime = 2;
    boolean branchDecision = false;
    // At each iteration the user sessions are distributed equally between the branch
    // transitions to ensure that the probabilities of the branch transitions stay equally
    final Map<Integer, List<List<UserSession>>> userSessionGroups = new HashMap<>();
    final List<List<UserSession>> startList = new ArrayList<>();
    startList.add(entryCallSequenceModel.getUserSessions());
    userSessionGroups.put(0, startList);
    // The loop that contains the branch
    for (int j = 0; j < numberOfLoops; j++) {
        countOfCallEvent3 = 0;
        countOfCallEvent4 = 0;
        final List<List<UserSession>> newUserSessionGroups = new ArrayList<>();
        // Ensures that the user sessions distribution stays equally
        for (int k = 0; k < userSessionGroups.get(j).size(); k++) {
            for (int i = 0; i < 2; i++) {
                final List<UserSession> userSessions = new ArrayList<>();
                newUserSessionGroups.add(userSessions);
            }
            final int indexGroupCallEvent3 = newUserSessionGroups.size() - 2;
            final int indexGroupCallEvent4 = newUserSessionGroups.size() - 1;
            for (int i = 0; i < userSessionGroups.get(j).get(k).size(); i++) {
                if (newUserSessionGroups.get(indexGroupCallEvent3).size() > newUserSessionGroups.get(indexGroupCallEvent4).size()) {
                    branchDecision = false;
                } else {
                    branchDecision = true;
                }
                // The branch within the loop
                if (branchDecision) {
                    BranchWithinLoopReference.createEntryCall(entryTime, exitTime, 2, k, j, i, userSessionGroups, newUserSessionGroups, indexGroupCallEvent3);
                    countOfCallEvent3++;
                    entryTime += 2;
                    exitTime += 2;
                } else {
                    BranchWithinLoopReference.createEntryCall(entryTime, exitTime, 3, k, j, i, userSessionGroups, newUserSessionGroups, indexGroupCallEvent4);
                    countOfCallEvent4++;
                    entryTime += 2;
                    exitTime += 2;
                }
                final EntryCallEvent entryCallEvent5 = new EntryCallEvent(entryTime, exitTime, ReferenceUsageModelBuilder.OPERATION_SIGNATURE[4], ReferenceUsageModelBuilder.CLASS_SIGNATURE[4], String.valueOf(i), "hostname");
                userSessionGroups.get(j).get(k).get(i).add(entryCallEvent5, true);
                entryTime -= 2;
                exitTime -= 2;
            }
        }
        userSessionGroups.put(j + 1, newUserSessionGroups);
        entryTime += 2;
        exitTime += 2;
    }
    // Sets the likelihoods of branch transitions
    final double likelihoodOfCallEvent3 = (double) countOfCallEvent3 / (double) numberOfConcurrentUsers;
    final double likelihoodOfCallEvent4 = (double) countOfCallEvent4 / (double) numberOfConcurrentUsers;
    branchTransition1.setBranchProbability(likelihoodOfCallEvent3);
    branchTransition2.setBranchProbability(likelihoodOfCallEvent4);
    // 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);
    testElements.setEntryCallSequenceModel(entryCallSequenceModel);
    testElements.setUsageModel(usageModel);
    return testElements;
}