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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            //wasteful. Also we should not release the news locks before firing
            //the events.
            ((News) changedNewsItem).acquireReadLockSpecial();
            eventRunnable.addCheckedUpdateEvent(createSaveEventTemplate(changedNewsItem));
          }
          condition.signal();
          setStateLock.unlock();
          save(changedNews);
          fDb.commit();
        } catch (Db4oException e) {
          throw new PersistenceException(e);

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    {


      public void actionPerformed(ActionEvent e)
      {
        lock.lock();
        cont.signal();
        lock.unlock();
      }


    });

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    entryLock.lock();
    try {
      Condition cond = lockMap.remove(offset);
      assert cond == condition;
      cond.signal();
    } finally {
      entryLock.unlock();
    }
  }

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    // call with lock held!
    private Runnable takeTask() {
        final Condition removeCondition = this.removeCondition;
        Runnable task = queue.poll();
        if (task != null) {
            removeCondition.signal();
            return task;
        } else {
            final Condition enqueueCondition = this.enqueueCondition;
            final long start = System.currentTimeMillis();
            boolean intr = Thread.interrupted();

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

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        if( ex[0]!=null )
            throw ex[0];
        assertTrue(lock.hasWaiters(condition));


        lock.lock();
        condition.signal();
        lock.unlock();


        UDIGTestUtil.inDisplayThreadWait(WAIT_LENGTH, new WaitCondition(){


            public boolean isTrue() {

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            Display.getCurrent().asyncExec(new Runnable(){


                public void run() {
                    lock.lock();
                    try {
                        condition.signal();
                    } finally {
                        lock.unlock();
                    }
                }

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                {
                    final Object result = entry.getValue() ;
                    final Condition condition = entry.getCondition() ;
                    if (condition != null)
                    {
                        condition.signal() ;
                    }
                    return result ;
                }
                return null ;
            }

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                {
                    entry.setInactive() ;
                    final Condition condition = entry.getCondition() ;
                    if (condition != null)
                    {
                        condition.signal() ;
                    }
                    return entry ;
                }
                return null ;
            }

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