Examples of java.util.concurrent.locks.Lock.lock()

java.util.concurrent.locks.Lock.lock()
Acquires the lock.
If the lock is not available then the current thread becomes disabled for thread scheduling purposes and lies dormant until the lock has been acquired.
Implementation Considerations
A {@code Lock} implementation may be able to detect erroneous useof the lock, such as an invocation that would cause deadlock, and may throw an (unchecked) exception in such circumstances. The circumstances and the exception type must be documented by that {@code Lock} implementation.

        unit2.getType(className2).getFullyQualifiedName(),
        ILaunchManager.DEBUG_MODE);


    final Lock lock = new ReentrantLock();
    final Condition condition = lock.newCondition();
    lock.lock();
    try {
      // We had two breakpoints set, so we need to resume twice:
      while (suspendResume[0] == null) {
        condition.await(100, TimeUnit.MICROSECONDS);
      }

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        return update;
    }


    private Lock getAndLock(String key) {
        Lock l = locks.get(key);
        l.lock();
        return l;
    }
}

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    private ReadWriteLock sync = new ReentrantReadWriteLock();


    public boolean add(E o) {
        Lock lock = sync.writeLock();
        lock.lock();
        Set nextVersion = null;
        try {
            if (!current.set().contains(o)) {
                nextVersion = new Set(current);
                return nextVersion.set().add(o);

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        }
    }


    public boolean remove(Object o) {
        Lock lock = sync.writeLock();
        lock.lock();
        Set nextVersion = null;
        try {
            if (current.set().contains(o)) {
                nextVersion = new Set(current);
                return nextVersion.set().remove(o);

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        }
    }


    public Set<E> currentSet() {
        Lock lock = sync.readLock();
        lock.lock();
        try {
            return current;
        } finally {
            lock.unlock();
        }

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            // as increment set the head revision in the read operation
            // (the read operation might see changes from other cluster nodes,
            // and so create a new head revision for the current cluster node,
            // to order revisions)
            Lock writeLock = backgroundOperationLock.writeLock();
            writeLock.lock();
            try {
                backgroundWrite();
                backgroundRead();
            } finally {
                writeLock.unlock();

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        return update;
    }


    private Lock getAndLock(String key) {
        Lock l = locks.get(key);
        l.lock();
        return l;
    }


    @Override
    public void setReadWriteMode(String readWriteMode) {

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    }
    
    @Override
    public <T extends Document> T find(Collection<T> collection, String key) {
        Lock lock = rwLock.readLock();
        lock.lock();
        try {
            ConcurrentSkipListMap<String, T> map = getMap(collection);
            return map.get(key);
        } finally {
            lock.unlock();

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                                String toKey,
                                String indexedProperty,
                                long startValue,
                                int limit) {
        Lock lock = rwLock.readLock();
        lock.lock();
        try {
            ConcurrentSkipListMap<String, T> map = getMap(collection);
            ConcurrentNavigableMap<String, T> sub = map.subMap(fromKey + "\0", toKey);
            ArrayList<T> list = new ArrayList<T>();
            for (T doc : sub.values()) {

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    }


    @Override
    public <T extends Document> void remove(Collection<T> collection, String path) {
        Lock lock = rwLock.writeLock();
        lock.lock();
        try {
            getMap(collection).remove(path);
        } finally {
            lock.unlock();
        }

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