Examples of java.util.concurrent.locks.Condition.signal()

Class java.util.concurrent.locks.Condition

Examples of java.util.concurrent.locks.Condition.signal()

java.util.concurrent.locks.Condition.signal()
Wakes up one waiting thread.
If any threads are waiting on this condition then one is selected for waking up. That thread must then re-acquire the lock before returning from {@code await}.
Implementation Considerations
An implementation may (and typically does) require that the current thread hold the lock associated with this {@code Condition} when this method is called. Implementations mustdocument this precondition and any actions taken if the lock is not held. Typically, an exception such as {@link IllegalMonitorStateException} will be thrown.

        long start = System.currentTimeMillis();
        Runnable doNothing = new Runnable() {
            public void run() {
                runLock.lock();
                try {
                    runCondition.signal();
                } finally {
                    runLock.unlock();
                }
            }
        };

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                    // Advance head and signal writer.
                    lock.lock();
                    try {
                        size++;
                        signal.signal(); // only the writer could be waiting now!
                    } finally {
                        lock.unlock();
                    }
                } while (0 <= read);
            }

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                // Advance tail and signal reader.
                lock.lock();
                try {
                    reader.off = (off + 1) % buffersLength;
                    reader.size--;
                    signal.signal(); // only the reader could be waiting now!
                } finally {
                    lock.unlock();
                }
            }
            out.flush();

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            @Override
            public void run() {
                firstLock.lock();
                System.out.println("Lock acquired on second thread");
                try{
                    firstCondition.signal();
                    System.out.println("Lock signalled on second thread");
                }finally{
                    System.out.println("Lock released on second thread");
                    firstLock.unlock();
                }

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                    otherClientLock = new ReentrantZkLock2(baseLockPath, new BaseZkSessionManager(newZk));
                    final Condition otherClientCondition = otherClientLock.newCondition();
                    otherClientLock.lock();
                    System.out.println("Lock acquired on second thread");
                    try{
                        otherClientCondition.signal();
                        System.out.println("Lock signalled on second thread");
                    }finally{
                        System.out.println("Lock released on second thread");
                        otherClientLock.unlock();
                    }

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            @Override
            public void run() {
                firstLock.lock();
                System.out.println("Lock acquired on second thread");
                try{
                    firstCondition.signal();
                    System.out.println("Lock signalled on second thread");
                }finally{
                    System.out.println("Lock released on second thread");
                    firstLock.unlock();
                }

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                    otherClientLock = new ReentrantZkLock(baseLockPath, new BaseZkSessionManager(newZk));
                    final Condition otherClientCondition = otherClientLock.newCondition();
                    otherClientLock.lock();
                    System.out.println("Lock acquired on second thread");
                    try {
                        otherClientCondition.signal();
                        System.out.println("Lock signalled on second thread");
                    } finally {
                        System.out.println("Lock released on second thread");
                        otherClientLock.unlock();
                    }

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