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

java.util.concurrent.locks.Lock.lockInterruptibly()
Acquires the lock unless the current thread is {@linkplain Thread#interrupt interrupted}.
Acquires the lock if it is available and returns immediately.
If the lock is not available then the current thread becomes disabled for thread scheduling purposes and lies dormant until one of two things happens:
- The lock is acquired by the current thread; or
- Some other thread {@linkplain Thread#interrupt interrupts} thecurrent thread, and interruption of lock acquisition is supported.
If the current thread:
- has its interrupted status set on entry to this method; or
- is {@linkplain Thread#interrupt interrupted} while acquiring thelock, and interruption of lock acquisition is supported,
then {@link InterruptedException} is thrown and the current thread'sinterrupted status is cleared.
Implementation Considerations
The ability to interrupt a lock acquisition in some implementations may not be possible, and if possible may be an expensive operation. The programmer should be aware that this may be the case. An implementation should document when this is the case.
An implementation can favor responding to an interrupt over normal method return.
A {@code Lock} implementation may be able to detecterroneous use of 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. @throws InterruptedException if the current thread isinterrupted while acquiring the lock (and interruption of lock acquisition is supported)

                Lock readLock = rwLock.readLock();
                //wait for other thread to be ready
                barrier.await();
                //now attempt to lock interruptibly
                try{
                    readLock.lockInterruptibly();
                }catch(InterruptedException ie){
                    //we were successfully interrupted
                    return true;
                }
                return false;

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        assertTrue("lock not acquired!",acquired);
        Future<Void> writeFuture = testService.submit(new Callable<Void>() {
            @Override
            public Void call() throws Exception {
                Lock writeLock = rwLock.writeLock();
                writeLock.lockInterruptibly();
                try{
                    return null;
                }finally {
                    writeLock.unlock();
                }

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        assertTrue("lock not acquired!",acquired);
        Future<Void> writeFuture = testService.submit(new Callable<Void>() {
            @Override
            public Void call() throws Exception {
                Lock writeLock = rwLock.writeLock();
                writeLock.lockInterruptibly();
                try{
                    return null;
                }finally {
                    writeLock.unlock();
                }

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    private Thread leader = null;




    public FetchRequest take() throws InterruptedException {
        final Lock lock = this.lock;
        lock.lockInterruptibly();
        try {
            for (;;) {
                FetchRequest first = this.queue.peek();
                if (first == null) {
                    this.available.await();

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