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

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

  1. HOME
  2. Java
  3. java
  4. java.util.concurrent.locks.*
  5. Lock
  6. unlock

Introduction

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

Prototype

void unlock();

Source Link

Document

Releases the lock.

Usage

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

@Override
public float[] estimatePreferences(long userID, long... itemIDs) throws NotReadyException {

    Generation generation = getCurrentGeneration();
    FastByIDMap<float[]> X = generation.getX();

    float[] userFeatures;
    Lock xLock = generation.getXLock().readLock();
    xLock.lock();//from  w  ww  .  j  a  v a  2s .co m
    try {
        userFeatures = X.get(userID);
    } finally {
        xLock.unlock();
    }
    if (userFeatures == null) {
        return new float[itemIDs.length]; // All 0.0f
    }

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

    Lock yLock = generation.getYLock().readLock();
    yLock.lock();
    try {
        float[] result = new float[itemIDs.length];
        for (int i = 0; i < itemIDs.length; i++) {
            long itemID = itemIDs[i];
            float[] itemFeatures = Y.get(itemID);
            if (itemFeatures != null) {
                float value = (float) SimpleVectorMath.dot(itemFeatures, userFeatures);
                Preconditions.checkState(LangUtils.isFinite(value), "Bad estimate");
                result[i] = value;
            } // else leave value at 0.0f
        }
        return result;
    } finally {
        yLock.unlock();
    }
}

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

public void setUserTag(long userID, String tag, float value, boolean bulk) {
    Preconditions.checkNotNull(tag);/*from   w ww  . j  a  v  a2 s.c  om*/
    Preconditions.checkArgument(!tag.isEmpty());
    // Record datum
    try {
        generationManager.appendUserTag(userID, tag, value, bulk);
    } catch (IOException ioe) {
        log.warn("Could not append datum; continuing", ioe);
    }

    Generation generation;
    try {
        generation = getCurrentGeneration();
    } catch (NotReadyException nre) {
        // Corner case -- no model ready so all we can do is record (above). Don't fail the request.
        return;
    }

    long tagID = tagHasher.toLongID(tag);

    FastIDSet userTagIDs = generation.getUserTagIDs();
    Lock userTagWriteLock = generation.getYLock().writeLock();
    userTagWriteLock.lock();
    try {
        userTagIDs.add(tagID);
    } finally {
        userTagWriteLock.unlock();
    }

    float[] userFeatures = getFeatures(userID, generation.getX(), generation.getXLock());
    float[] tagFeatures = getFeatures(tagID, generation.getY(), generation.getYLock());
    updateFeatures(userFeatures, tagFeatures, value, generation);

    updateClusters(userID, userFeatures, generation.getUserClusters(),
            generation.getUserClustersLock().readLock());
}

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

public void setItemTag(String tag, long itemID, float value, boolean bulk) {
    Preconditions.checkNotNull(tag);//  w  ww .  java 2 s .c o m
    Preconditions.checkArgument(!tag.isEmpty());
    // Record datum
    try {
        generationManager.appendItemTag(tag, itemID, value, bulk);
    } catch (IOException ioe) {
        log.warn("Could not append datum; continuing", ioe);
    }

    Generation generation;
    try {
        generation = getCurrentGeneration();
    } catch (NotReadyException nre) {
        // Corner case -- no model ready so all we can do is record (above). Don't fail the request.
        return;
    }

    long tagID = tagHasher.toLongID(tag);

    FastIDSet itemTagIDs = generation.getItemTagIDs();
    Lock itemTagWriteLock = generation.getXLock().writeLock();
    itemTagWriteLock.lock();
    try {
        itemTagIDs.add(tagID);
    } finally {
        itemTagWriteLock.unlock();
    }

    float[] tagFeatures = getFeatures(tagID, generation.getX(), generation.getXLock());
    float[] itemFeatures = getFeatures(itemID, generation.getY(), generation.getYLock());
    updateFeatures(tagFeatures, itemFeatures, value, generation);

    updateClusters(itemID, itemFeatures, generation.getItemClusters(),
            generation.getItemClustersLock().readLock());
}

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

@Override
public float estimateForAnonymous(long toItemID, long[] itemIDs, float[] values)
        throws NotReadyException, NoSuchItemException {

    Generation generation = getCurrentGeneration();
    FastByIDMap<float[]> Y = generation.getY();
    Lock yLock = generation.getYLock().readLock();
    float[] toItemFeatures;
    yLock.lock();//from w  ww  .  ja v  a 2  s  . c o  m
    try {
        toItemFeatures = Y.get(toItemID);
    } finally {
        yLock.unlock();
    }

    if (toItemFeatures == null) {
        throw new NoSuchItemException(toItemID);
    }

    float[] anonymousUserFeatures = buildAnonymousUserFeatures(itemIDs, values);

    return (float) SimpleVectorMath.dot(anonymousUserFeatures, toItemFeatures);
}

From source file:com.cloudera.lib.service.instrumentation.InstrumentationService.java

@SuppressWarnings("unchecked")
private <T> T getToAdd(String group, String name, Class<T> klass, Lock lock, Map<String, Map<String, T>> map) {
    boolean locked = false;
    try {/*w  ww .j a  v a 2 s . co m*/
        Map<String, T> groupMap = map.get(group);
        if (groupMap == null) {
            lock.lock();
            locked = true;
            groupMap = map.get(group);
            if (groupMap == null) {
                groupMap = new ConcurrentHashMap<String, T>();
                map.put(group, groupMap);
            }
        }
        T element = groupMap.get(name);
        if (element == null) {
            if (!locked) {
                lock.lock();
                locked = true;
            }
            element = groupMap.get(name);
            if (element == null) {
                try {
                    if (klass == Timer.class) {
                        element = (T) new Timer(timersSize);
                    } else {
                        element = klass.newInstance();
                    }
                } catch (Exception ex) {
                    throw new RuntimeException(ex);
                }
                groupMap.put(name, element);
            }
        }
        return element;
    } finally {
        if (locked) {
            lock.unlock();
        }
    }
}

From source file:org.archive.modules.recrawl.hbase.SingleHBaseTable.java

public Result get(Get g) throws IOException {
    getCount.incrementAndGet();/*from  w w w  .  j  a v  a  2s  . c  o  m*/
    // trigger reconnection if necessary. as table can be modified before
    // read lock is acquired, we don't read table variable here.
    getTable();
    boolean htableFailed = false;
    HTableInterface htable = null;
    Lock readLock = tableUseLock.readLock();
    try {
        if (!readLock.tryLock(TRY_READ_LOCK_TIMEOUT, TimeUnit.SECONDS)) {
            getSkipCount.incrementAndGet();
            throw new IOException("could not acquire read lock for HTable.");
        }
    } catch (InterruptedException ex) {
        throw new IOException("interrupted while acquiring read lock", ex);
    }
    try {
        htable = table;
        if (htable == null) {
            getSkipCount.incrementAndGet();
            throw new IOException("HBase connection is unvailable.");
        }
        try {
            return htable.get(g);
        } catch (NotServingRegionException ex) {
            // caused by disruption to HBase cluster. no need to
            // refresh HBase connection, since connection itself
            // is working okay.
            // TODO: should we need to back-off for a while? other
            // regions may still be accessible.
            getErrorCount.incrementAndGet();
            throw ex;
        } catch (IOException ex) {
            getErrorCount.incrementAndGet();
            htableFailed = true;
            throw ex;
        }
    } finally {
        readLock.unlock();
        if (htableFailed) {
            closeTable(htable, true);
        }
    }
}

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

@Override
public FastIDSet getUserCluster(int n) throws NotReadyException {
    Generation generation = getCurrentGeneration();
    List<IDCluster> clusters = generation.getUserClusters();
    if (clusters == null || clusters.isEmpty()) {
        throw new UnsupportedOperationException();
    }/* ww w  . j a v a 2s . co m*/
    Lock lock = generation.getUserClustersLock().readLock();
    FastIDSet members;
    lock.lock();
    try {
        members = clusters.get(n).getMembers();
    } finally {
        lock.unlock();
    }
    synchronized (members) {
        return members.clone();
    }
}

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

@Override
public FastIDSet getItemCluster(int n) throws NotReadyException {
    Generation generation = getCurrentGeneration();
    List<IDCluster> clusters = generation.getItemClusters();
    if (clusters == null || clusters.isEmpty()) {
        throw new UnsupportedOperationException();
    }/* ww w.j  ava  2s. c  o  m*/
    Lock lock = generation.getItemClustersLock().readLock();
    FastIDSet members;
    lock.lock();
    try {
        members = clusters.get(n).getMembers();
    } finally {
        lock.unlock();
    }
    synchronized (members) {
        return members.clone();
    }
}

From source file:org.apache.bookkeeper.bookie.EntryLogManagerForEntryLogPerLedger.java

private void onCacheEntryRemoval(
        RemovalNotification<Long, EntryLogAndLockTuple> removedLedgerEntryLogMapEntry) {
    Long ledgerId = removedLedgerEntryLogMapEntry.getKey();
    log.debug("LedgerId {} is being evicted from the cache map because of {}", ledgerId,
            removedLedgerEntryLogMapEntry.getCause());
    EntryLogAndLockTuple entryLogAndLockTuple = removedLedgerEntryLogMapEntry.getValue();
    if (entryLogAndLockTuple == null) {
        log.error("entryLogAndLockTuple is not supposed to be null in entry removal listener for ledger : {}",
                ledgerId);//from   w  w  w . j  av  a  2  s  .  c o m
        return;
    }
    Lock lock = entryLogAndLockTuple.ledgerLock;
    BufferedLogChannelWithDirInfo logChannelWithDirInfo = entryLogAndLockTuple.getEntryLogWithDirInfo();
    if (logChannelWithDirInfo == null) {
        log.error("logChannel for ledger: {} is not supposed to be null in entry removal listener", ledgerId);
        return;
    }
    lock.lock();
    try {
        BufferedLogChannel logChannel = logChannelWithDirInfo.getLogChannel();
        // Append ledgers map at the end of entry log
        try {
            logChannel.appendLedgersMap();
        } catch (Exception e) {
            log.error("Got IOException while trying to appendLedgersMap in cacheEntryRemoval callback", e);
        }
        replicaOfCurrentLogChannels.remove(logChannel.getLogId());
        rotatedLogChannels.add(logChannel);
        entryLogsPerLedgerCounter.removedLedgerFromEntryLogMapCache(ledgerId,
                removedLedgerEntryLogMapEntry.getCause());
    } finally {
        lock.unlock();
    }
}

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

public SocialDivorce getDivorce() {
    Lock lock = rwDivorceLock.readLock();
    lock.lock();//from   ww  w  .  jav a 2  s.  co  m
    try {
        return socialDivorce;
    } finally {
        lock.unlock();
    }
}