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

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

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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:com.netprogs.minecraft.plugins.social.SocialPerson.java

public void removeRelationship(SocialPerson memberPerson) {
    Lock lock = rwRelationshipLock.writeLock();
    lock.lock();
    try {//from w  ww .ja  v a  2 s .  c o  m
        String memberName = memberPerson.getName();
        firePlayerMemberChangeEvent(memberName, SocialNetworkCommandType.relationship, Type.preRemove,
                (person.getRelationships().size() == 0));

        person.getRelationships().remove(memberName);
        relationships.remove(memberName);

        firePlayerMemberChangeEvent(memberName, SocialNetworkCommandType.relationship, Type.postRemove,
                (person.getRelationships().size() == 0));
    } finally {
        lock.unlock();
    }
}

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

/**
 * <p>Lists the items that were most influential in recommending a given item to a given user. Exactly how this
 * is determined is left to the implementation, but, generally this will return items that the user prefers
 * and that are similar to the given item.</p>
 *
 * <p>These values by which the results are ordered are opaque values and have no interpretation
 * other than that larger means stronger.</p>
 *
 * @param userID ID of user who was recommended the item
 * @param itemID ID of item that was recommended
 * @param howMany maximum number of items to return
 * @return {@link List} of {@link RecommendedItem}, ordered from most influential in recommended the given
 *  item to least/*from  w  w w. j av a 2  s .  co  m*/
 * @throws NoSuchUserException if the user is not known in the model
 * @throws NoSuchItemException if the item is not known in the model
 * @throws NotReadyException if the recommender has no model available yet
 */
@Override
public List<RecommendedItem> recommendedBecause(long userID, long itemID, int howMany)
        throws NoSuchUserException, NoSuchItemException, NotReadyException {

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

    Generation generation = getCurrentGeneration();
    FastByIDMap<FastIDSet> knownItemIDs = generation.getKnownItemIDs();
    if (knownItemIDs == null) {
        throw new UnsupportedOperationException("No known item IDs available");
    }

    Lock knownItemLock = generation.getKnownItemLock().readLock();
    FastIDSet userKnownItemIDs;
    knownItemLock.lock();
    try {
        userKnownItemIDs = knownItemIDs.get(userID);
    } finally {
        knownItemLock.unlock();
    }
    if (userKnownItemIDs == null) {
        throw new NoSuchUserException(userID);
    }

    FastByIDMap<float[]> Y = generation.getY();

    Lock yLock = generation.getYLock().readLock();
    yLock.lock();
    try {

        float[] features = Y.get(itemID);
        if (features == null) {
            throw new NoSuchItemException(itemID);
        }
        FastByIDMap<float[]> toFeatures;
        synchronized (userKnownItemIDs) {
            toFeatures = new FastByIDMap<float[]>(userKnownItemIDs.size());
            LongPrimitiveIterator it = userKnownItemIDs.iterator();
            while (it.hasNext()) {
                long fromItemID = it.nextLong();
                float[] fromFeatures = Y.get(fromItemID);
                toFeatures.put(fromItemID, fromFeatures);
            }
        }

        return TopN.selectTopN(new RecommendedBecauseIterator(toFeatures.entrySet().iterator(),
                generation.getUserTagIDs(), features), howMany);
    } finally {
        yLock.unlock();
    }
}

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

public void breakMarriage() {
    Lock lock = rwMarriageLock.writeLock();
    lock.lock();
    try {/*  www .j  a v a2s  . c  om*/

        String spouseName = StringUtils.EMPTY;
        if (person.getMarriage() != null) {
            spouseName = person.getMarriage().getPlayerName();
            firePlayerMemberChangeEvent(spouseName, SocialNetworkCommandType.marriage, Type.preRemove, true);
        }

        person.setMarriage(null);
        socialMarriage = null;

        if (StringUtils.isNotEmpty(spouseName)) {
            firePlayerMemberChangeEvent(spouseName, SocialNetworkCommandType.marriage, Type.postRemove, true);
        }

    } finally {
        lock.unlock();
    }
}

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

public <U extends IMessage> int getMessageCountFrom(String fromPlayerName, Class<U> messageClass) {

    Lock lock = rwMessageQueueLock.readLock();
    lock.lock();
    try {//from   www  . j a va2 s  .  c o m

        String className = messageClass.getCanonicalName();
        if (person.getMessageQueue().containsKey(className)) {
            if (person.getMessageQueue().get(className).containsKey(fromPlayerName)) {
                return person.getMessageQueue().get(className).get(fromPlayerName).size();
            }
        }

        return 0;

    } finally {
        lock.unlock();
    }
}

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

public <U extends IMessage> int getMessagesCount(Class<U> messageClass) {

    Lock lock = rwMessageQueueLock.readLock();
    lock.lock();
    try {// w ww . j  a va2  s.  c om

        int count = 0;
        String className = messageClass.getCanonicalName();
        if (person.getMessageQueue().containsKey(className)) {
            Set<String> senders = person.getMessageQueue().get(className).keySet();
            for (String sender : senders) {
                count += person.getMessageQueue().get(className).get(sender).size();
            }
        }

        return count;

    } finally {
        lock.unlock();
    }
}

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

public void breakEngagement() {
    Lock lock = rwEngagementLock.writeLock();
    lock.lock();
    try {/*from w w w .j  a va2 s .  co m*/

        String engagementName = StringUtils.EMPTY;
        if (person.getEngagement() != null) {
            engagementName = person.getEngagement().getPlayerName();
            firePlayerMemberChangeEvent(engagementName, SocialNetworkCommandType.engagement, Type.preRemove,
                    true);
        }

        person.setEngagement(null);
        socialEngagement = null;

        if (StringUtils.isNotEmpty(engagementName)) {
            firePlayerMemberChangeEvent(engagementName, SocialNetworkCommandType.engagement, Type.postRemove,
                    true);
        }
    } finally {
        lock.unlock();
    }
}

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

/**
 * Returns all the messages of the given type.
 * @param messageClass//from w  ww  . ja  v a 2 s .  co  m
 * @return
 */
@SuppressWarnings("unchecked")
public <U extends IMessage> Map<String, List<U>> getMessages(Class<U> messageClass) {

    Lock lock = rwMessageQueueLock.readLock();
    lock.lock();
    try {

        String className = messageClass.getCanonicalName();
        if (person.getMessageQueue().containsKey(className)) {

            Map<String, List<U>> map = new HashMap<String, List<U>>(
                    (Map<? extends String, ? extends List<U>>) person.getMessageQueue().get(className));
            return Collections.unmodifiableMap(map);
        }

        // return an empty list
        return Collections.emptyMap();

    } finally {
        lock.unlock();
    }
}

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

/**
 * Removes all the messages of every type of the given person.
 * @param fromPlayerName//  ww w  . j a  v a  2  s.c o  m
 * @param messageClass
 * @return
 */
public void removeMessagesFrom(SocialPerson fromPerson) {

    Lock lock = rwMessageQueueLock.writeLock();
    lock.lock();
    try {

        // go through every class in the message queue and remove the player list from it
        for (String className : person.getMessageQueue().keySet()) {

            // remove the person
            person.getMessageQueue().get(className).remove(fromPerson.getName());

            // if the message type list is empty, remove it also, just to save object memory
            if (person.getMessageQueue().get(className).keySet().size() == 0) {
                person.getMessageQueue().remove(className);
            }
        }

    } finally {
        lock.unlock();
    }
}

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

public ExamProposedChange update(ExamProposedChange change) {
    Lock lock = currentSolution().getLock().writeLock();
    lock.lock();
    try {//from w  w w.  ja v a  2 s . c  o m
        Hashtable<Exam, ExamPlacement> undoAssign = new Hashtable();
        HashSet<Exam> undoUnassing = new HashSet();
        Vector<Exam> unassign = new Vector();
        Vector<ExamPlacement> assign = new Vector();
        HashSet<ExamPlacement> conflicts = new HashSet();
        /*
        for (ExamAssignment assignment: change.getConflicts()) {
        ExamPlacement placement = getPlacement(assignment);
        if (placement==null || !placement.equals(placement.variable().getAssignment())) return null;
        undoAssign.put((Exam)placement.variable(),placement);
        unassign.add((Exam)placement.variable());
        }
        */
        for (ExamAssignment assignment : change.getAssignments()) {
            ExamPlacement placement = getPlacement(assignment);
            if (placement == null)
                return null;
            if (currentSolution().getAssignment().getValue(placement.variable()) != null)
                undoAssign.put((Exam) placement.variable(),
                        currentSolution().getAssignment().getValue(placement.variable()));
            else
                undoUnassing.add((Exam) placement.variable());
            assign.add(placement);
            unassign.add((Exam) placement.variable());
        }
        for (Exam exam : unassign)
            currentSolution().getAssignment().unassign(0, exam);
        for (ExamPlacement placement : assign) {
            for (Iterator i = placement.variable().getModel()
                    .conflictValues(currentSolution().getAssignment(), placement).iterator(); i.hasNext();) {
                ExamPlacement conflict = (ExamPlacement) i.next();
                Exam conflictingExam = (Exam) conflict.variable();
                if (!undoAssign.containsKey(conflictingExam) && !undoUnassing.contains(conflictingExam))
                    undoAssign.put(conflictingExam, conflict);
                conflicts.add(conflict);
                currentSolution().getAssignment().unassign(0, conflict.variable());
            }
            currentSolution().getAssignment().assign(0, placement);
        }
        change.getAssignments().clear();
        change.getConflicts().clear();
        for (ExamPlacement assignment : assign)
            if (!conflicts.contains(assignment))
                change.getAssignments()
                        .add(new ExamAssignmentInfo(assignment, currentSolution().getAssignment()));
        for (Exam exam : undoUnassing)
            if (currentSolution().getAssignment().getValue(exam) != null)
                currentSolution().getAssignment().unassign(0, exam);
        for (Map.Entry<Exam, ExamPlacement> entry : undoAssign.entrySet())
            currentSolution().getAssignment().unassign(0, entry.getKey());
        for (Map.Entry<Exam, ExamPlacement> entry : undoAssign.entrySet())
            currentSolution().getAssignment().assign(0, entry.getValue());
        for (ExamPlacement conflict : conflicts) {
            ExamPlacement original = undoAssign.get((Exam) conflict.variable());
            change.getConflicts().add(new ExamAssignment(original == null ? conflict : original,
                    currentSolution().getAssignment()));
        }
        return change;
    } finally {
        lock.unlock();
    }
}

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

public boolean backup(File folder, String puid) {
    folder.mkdirs();/*from www . ja  v  a  2s.c o m*/
    if (currentSolution() == null)
        return false;
    Lock lock = currentSolution().getLock().readLock();
    lock.lock();
    try {
        File outXmlFile = new File(folder, "exam_" + puid + BackupFileFilter.sXmlExtension);
        File outPropertiesFile = new File(folder, "exam_" + puid + BackupFileFilter.sPropertiesExtension);
        try {
            getProperties().setProperty("Xml.SaveConflictTable", "false");
            FileOutputStream fos = null;
            try {
                fos = new FileOutputStream(outXmlFile);
                Document document = ((ExamModel) currentSolution().getModel())
                        .save(currentSolution().getAssignment());
                ExamConflictStatisticsInfo cbsInfo = getCbsInfo();
                if (cbsInfo != null)
                    cbsInfo.save(document.getRootElement().addElement("cbsInfo"));
                (new XMLWriter(fos, OutputFormat.createPrettyPrint())).write(document);
                fos.flush();
                fos.close();
                fos = null;
            } finally {
                try {
                    if (fos != null)
                        fos.close();
                } catch (IOException e) {
                }
            }
            for (Iterator i = getProperties().entrySet().iterator(); i.hasNext();) {
                Map.Entry entry = (Map.Entry) i.next();
                if (!(entry.getKey() instanceof String)) {
                    sLog.error("Configuration key " + entry.getKey() + " is not of type String ("
                            + entry.getKey().getClass() + ")");
                    i.remove();
                } else if (!(entry.getValue() instanceof String)) {
                    sLog.error("Value of configuration key " + entry.getKey() + " is not of type String ("
                            + entry.getValue() + " is of type " + entry.getValue().getClass() + ")");
                    i.remove();
                }
            }
            try {
                fos = new FileOutputStream(outPropertiesFile);
                getProperties().store(fos, "Backup file");
                fos.flush();
                fos.close();
                fos = null;
            } finally {
                try {
                    if (fos != null)
                        fos.close();
                } catch (IOException e) {
                }
            }
            return true;
        } catch (Exception e) {
            sLog.error(e.getMessage(), e);
            if (outXmlFile.exists())
                outXmlFile.delete();
            if (outPropertiesFile.exists())
                outPropertiesFile.delete();
        }
    } finally {
        lock.unlock();
    }
    return false;
}