Example usage for java.util.concurrent.locks Lock lock

List of usage examples for java.util.concurrent.locks Lock lock

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Introduction

In this page you can find the example usage for java.util.concurrent.locks Lock lock.

Prototype

lock

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Usage

From source file:org.unitime.timetable.solver.exam.ExamSolver.java

public Collection<ExamAssignmentInfo> getAssignedExamsOfInstructor(Long instructorId) {
    Lock lock = currentSolution().getLock().readLock();
    lock.lock();
    try {//  w  ww  . jav a2s .  c  o m
        ExamInstructor instructor = null;
        for (ExamInstructor i : ((ExamModel) currentSolution().getModel()).getInstructors()) {
            if (i.getId() == instructorId) {
                instructor = i;
                break;
            }
        }
        if (instructor == null)
            return null;
        Vector<ExamAssignmentInfo> ret = new Vector<ExamAssignmentInfo>();
        for (ExamPeriod period : ((ExamModel) currentSolution().getModel()).getPeriods()) {
            Set exams = instructor.getExams(currentSolution().getAssignment(), period);
            if (exams != null)
                for (Iterator i = exams.iterator(); i.hasNext();) {
                    Exam exam = (Exam) i.next();
                    ret.add(new ExamAssignmentInfo(currentSolution().getAssignment().getValue(exam),
                            currentSolution().getAssignment()));
                }
        }
        return ret;
    } finally {
        lock.unlock();
    }
}

From source file:org.unitime.timetable.solver.exam.ExamSolver.java

public Collection<ExamAssignmentInfo[]> getChangesToBest(Long subjectAreaId) {
    String sa = (subjectAreaId != null && subjectAreaId >= 0
            ? new SubjectAreaDAO().get(subjectAreaId).getSubjectAreaAbbreviation() + " "
            : null);/*  w w  w .  ja  v  a 2s .co m*/
    Vector<ExamAssignmentInfo[]> changes = new Vector<ExamAssignmentInfo[]>();
    Lock lock = currentSolution().getLock().readLock();
    lock.lock();
    try {
        for (Exam exam : currentSolution().getModel().variables()) {
            if (sa != null) {
                boolean hasSubjectArea = false;
                for (Iterator<ExamOwner> f = exam.getOwners().iterator(); !hasSubjectArea && f.hasNext();) {
                    ExamOwner ecs = f.next();
                    hasSubjectArea = ecs.getName().startsWith(sa);
                }
                if (!hasSubjectArea)
                    continue;
            }
            if (!ToolBox.equals(exam.getBestAssignment(), currentSolution().getAssignment().getValue(exam))) {
                changes.add(new ExamAssignmentInfo[] {
                        new ExamAssignmentInfo(exam, exam.getBestAssignment(),
                                currentSolution().getAssignment()),
                        new ExamAssignmentInfo(exam, currentSolution().getAssignment().getValue(exam),
                                currentSolution().getAssignment()) });
            }
        }
    } finally {
        lock.unlock();
    }
    return changes;
}

From source file:org.unitime.timetable.solver.exam.ExamSolver.java

public Collection<ExamAssignmentInfo[]> getChangesToInitial(Long subjectAreaId) {
    String sa = (subjectAreaId != null && subjectAreaId >= 0
            ? new SubjectAreaDAO().get(subjectAreaId).getSubjectAreaAbbreviation() + " "
            : null);/*w  w w  .  j  ava2  s.  c om*/
    Vector<ExamAssignmentInfo[]> changes = new Vector<ExamAssignmentInfo[]>();
    Lock lock = currentSolution().getLock().readLock();
    lock.lock();
    try {
        for (Exam exam : currentSolution().getModel().variables()) {
            if (sa != null) {
                boolean hasSubjectArea = false;
                for (Iterator<ExamOwner> f = exam.getOwners().iterator(); !hasSubjectArea && f.hasNext();) {
                    ExamOwner ecs = f.next();
                    hasSubjectArea = ecs.getName().startsWith(sa);
                }
                if (!hasSubjectArea)
                    continue;
            }
            if (!ToolBox.equals(exam.getInitialAssignment(),
                    currentSolution().getAssignment().getValue(exam))) {
                changes.add(new ExamAssignmentInfo[] {
                        new ExamAssignmentInfo(exam, exam.getInitialAssignment(),
                                currentSolution().getAssignment()),
                        new ExamAssignmentInfo(exam, currentSolution().getAssignment().getValue(exam),
                                currentSolution().getAssignment()) });
            }
        }
    } finally {
        lock.unlock();
    }
    return changes;
}

From source file:net.myrrix.online.ServerRecommender.java

@Override
public List<RecommendedItem> mostPopularItems(int howMany, IDRescorer rescorer) throws NotReadyException {

    Preconditions.checkArgument(howMany > 0, "howMany must be positive");

    Generation generation = getCurrentGeneration();
    FastByIDMap<FastIDSet> knownItemIDs = generation.getKnownItemIDs();
    if (knownItemIDs == null) {
        throw new UnsupportedOperationException();
    }//from  w w w  .  java  2 s . c om

    FastIDSet itemTagIDs = generation.getItemTagIDs();
    FastByIDFloatMap itemCounts = new FastByIDFloatMap();
    Lock knownItemReadLock = generation.getKnownItemLock().readLock();
    knownItemReadLock.lock();
    try {
        // Don't count data from users that are really item tags
        Lock xReadLock = generation.getXLock().readLock();
        xReadLock.lock();
        try {

            for (FastByIDMap.MapEntry<FastIDSet> entry : generation.getKnownItemIDs().entrySet()) {
                long userID = entry.getKey();
                if (!itemTagIDs.contains(userID)) {
                    FastIDSet itemIDs = entry.getValue();
                    synchronized (itemIDs) {
                        LongPrimitiveIterator it = itemIDs.iterator();
                        while (it.hasNext()) {
                            long itemID = it.nextLong();
                            itemCounts.increment(itemID, 1.0f);
                        }
                    }
                }
            }

        } finally {
            xReadLock.unlock();
        }
    } finally {
        knownItemReadLock.unlock();
    }

    // Filter out 'items' that were really user tags
    FastIDSet userTagIDs = generation.getUserTagIDs();
    Lock yReadLock = generation.getYLock().readLock();
    yReadLock.lock();
    try {
        LongPrimitiveIterator it = itemCounts.keySetIterator();
        while (it.hasNext()) {
            if (userTagIDs.contains(it.nextLong())) {
                it.remove();
            }
        }
    } finally {
        yReadLock.unlock();
    }

    return TopN.selectTopN(new MostPopularItemsIterator(itemCounts.entrySet().iterator(), rescorer), howMany);
}

From source file:org.unitime.timetable.solver.exam.ExamSolver.java

public ExamPlacement getPlacement(ExamAssignment assignment) {
    Lock lock = currentSolution().getLock().readLock();
    lock.lock();
    try {/*w  w w  . jav a  2  s  .c  o m*/
        Exam exam = getExam(assignment.getExamId());
        if (exam == null)
            return null;
        ExamPeriodPlacement period = null;
        for (ExamPeriodPlacement p : exam.getPeriodPlacements()) {
            if (p.getId().equals(assignment.getPeriodId())) {
                period = p;
                break;
            }
        }
        if (period == null)
            return null;
        HashSet rooms = new HashSet();
        for (ExamRoomInfo roomInfo : assignment.getRooms()) {
            Long roomId = roomInfo.getLocationId();
            ExamRoomPlacement room = null;
            for (ExamRoomPlacement r : exam.getRoomPlacements()) {
                if (r.getId() == roomId) {
                    room = r;
                    break;
                }
            }
            if (room != null)
                rooms.add(room);
        }
        return new ExamPlacement(exam, period, rooms);
    } finally {
        lock.unlock();
    }
}

From source file:org.unitime.timetable.solver.exam.ExamSolver.java

public ExamAssignmentInfo getAssignment(Long examId, Long periodId, Collection<Long> roomIds) {
    Lock lock = currentSolution().getLock().readLock();
    lock.lock();
    try {/* www  .  j  av a2  s .  c  o  m*/
        Exam exam = getExam(examId);
        if (exam == null)
            return null;
        ExamPeriodPlacement period = null;
        for (ExamPeriodPlacement p : exam.getPeriodPlacements()) {
            if (p.getId().equals(periodId)) {
                period = p;
                break;
            }
        }
        if (period == null)
            return null;
        HashSet rooms = new HashSet();
        for (Long roomId : roomIds) {
            ExamRoomPlacement room = null;
            for (ExamRoomPlacement r : exam.getRoomPlacements()) {
                if (r.getId() == roomId) {
                    room = r;
                    break;
                }
            }
            if (room != null)
                rooms.add(room);
        }
        return new ExamAssignmentInfo(exam, new ExamPlacement(exam, period, rooms),
                currentSolution().getAssignment());
    } finally {
        lock.unlock();
    }
}

From source file:org.unitime.timetable.solver.exam.ExamSolver.java

protected void onFinish() {
    super.onFinish();
    try {// w w w .j  a  v a  2  s  . c o  m
        iWorking = true;
        if (currentSolution().getBestInfo() != null)
            currentSolution().restoreBest();
        if (currentSolution().getBestInfo() != null
                && getProperties().getPropertyBoolean("General.Save", false)) {
            ExamDatabaseSaver saver = new ExamDatabaseSaver(this);
            Lock lock = currentSolution().getLock().readLock();
            lock.lock();
            try {
                saver.save();
            } finally {
                lock.unlock();
            }
        }
        if (getProperties().getPropertyBoolean("General.Unload", false)) {
            dispose();
        } else {
            Progress.getInstance(currentSolution().getModel()).setStatus("Awaiting commands ...");
        }
    } finally {
        iWorking = false;
    }
}

From source file:org.unitime.timetable.solver.exam.ExamSolver.java

public ExamSuggestionsInfo getSuggestions(long examId, ExamProposedChange change, String filter, int depth,
        int limit, long timeOut) {
    Lock lock = currentSolution().getLock().writeLock();
    lock.lock();
    try {// ww w  . j  a  va  2s.  c  om
        Exam exam = getExam(examId);
        if (exam == null)
            return null;
        ExamSuggestions s = new ExamSuggestions(this);
        s.setDepth(depth);
        s.setFilter(filter);
        s.setLimit(limit);
        s.setTimeOut(timeOut);
        TreeSet<ExamProposedChange> suggestions = s.computeSuggestions(exam,
                (change == null ? null : change.getAssignments()));
        String message = null;
        if (s.wasTimeoutReached()) {
            message = "(" + (timeOut / 1000l) + "s timeout reached, " + s.getNrCombinationsConsidered()
                    + " possibilities up to " + depth + " changes were considered, ";
        } else {
            message = "(all " + s.getNrCombinationsConsidered() + " possibilities up to " + depth
                    + " changes were considered, ";
        }
        if (suggestions.isEmpty()) {
            message += "no suggestion found)";
        } else if (s.getNrSolutions() > suggestions.size()) {
            message += "top " + suggestions.size() + " of " + s.getNrSolutions() + " suggestions displayed)";
        } else {
            message += suggestions.size() + " suggestions displayed)";
        }
        return new ExamSuggestionsInfo(suggestions, message, s.wasTimeoutReached());
    } finally {
        lock.unlock();
    }
}

From source file:com.netprogs.minecraft.plugins.social.SocialPerson.java

public String getName() {
    Lock lock = rwNameLock.readLock();
    lock.lock();
    try {//from  w  w  w  .  ja v  a  2 s.c  o m
        return person.getName();
    } finally {
        lock.unlock();
    }
}

From source file:com.netprogs.minecraft.plugins.social.SocialPerson.java

public ICommandType getWaitCommand() {
    Lock lock = rwWaitLock.readLock();
    lock.lock();
    try {/* www.j a v a  2s  .  com*/
        return person.getWaitCommand();
    } finally {
        lock.unlock();
    }
}