List of tryAcquire() Examples

Examples of tryAcquire()

com.hazelcast.core.ISemaphore.tryAcquire()
Acquires a permit, if one is available and returns immediately, with the value {@code true}, reducing the number of available permits by one.
If no permit is available then this method will return immediately with the value {@code false}. @return {@code true} if a permit was acquired and {@code false}otherwise
java.util.concurrent.Semaphore.tryAcquire()
Acquires a permit from this semaphore, only if one is available at the time of invocation.
Acquires a permit, if one is available and returns immediately, with the value {@code true}, reducing the number of available permits by one.
If no permit is available then this method will return immediately with the value {@code false}.
Even when this semaphore has been set to use a fair ordering policy, a call to {@code tryAcquire()} willimmediately acquire a permit if one is available, whether or not other threads are currently waiting. This "barging" behavior can be useful in certain circumstances, even though it breaks fairness. If you want to honor the fairness setting, then use {@link #tryAcquire(long,TimeUnit) tryAcquire(0, TimeUnit.SECONDS) }which is almost equivalent (it also detects interruption). @return {@code true} if a permit was acquired and {@code false}otherwise
org.apache.hadoop.hbase.InterProcessLock.tryAcquire()
Acquire the lock within a wait time. @param timeoutMs The maximum time (in milliseconds) to wait for the lock,-1 to wait indefinitely @return True if the lock was acquired, false if waiting time elapsedbefore the lock was acquired @throws IOException If there is an unrecoverable error talking talking(e.g., when talking to a lock service) when acquiring the lock @throws InterruptedException If the thread is interrupted while waiting toacquire the lock
org.chromium.sdk.CallbackSemaphore.tryAcquire()
Tries to acquire the semaphore. This method blocks until the semaphore is released; typically release call comes from a worker thread of org.chromium.sdk, the same thread that may call all other callbacks. It is vital not to call this method from any callback of org.chromium.sdk, because it's a sure deadlock. To prevent, this the method declares throwing {@code MethodIsBlockingException} which is symbolically thrown wheneversomeone violates this rule (i.e. invokes this method from a callback). Though currently nobody actually throws it, such declarations help to track blocking methods. @return false if {@code timeout} was exceeded and we gave up @throws MethodIsBlockingException if called from a callback
org.menagerie.latches.spi.ZkSemaphore.tryAcquire()
Acquires a permit from this semaphore only if it is available at the time of invocation.
If a permit is immediately available, this method returns {@code true} immediately, reducing the number ofavailable permits in the semaphore by one.
If no permit is available then this method will return immediately with the value {@code false}.
Note: Unlike {@link java.util.concurrent.Semaphore#tryAcquire()}, this method will obey ordering policies, and will never acquire a permit at the expense of another party. @return true if a permit has been acquired, false otherwise

Examples of java.util.concurrent.Semaphore.tryAcquire()

156 157 158 159 160 161 162 163 164 165 166       }       {         // wait until jetty handler receives reply and captures session         for ( int i = 1; i <= 12; i++ ) {           log.debug( "Waiting for 5 sec (" + i + ")" );           if ( semaphore.tryAcquire( 5, TimeUnit.SECONDS ) ) {             Thread.sleep( 1000 );             break;           }         }       }

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Examples of java.util.concurrent.Semaphore.tryAcquire()

102 103 104 105 106 107 108 109 110 111 112          // Reacquire the semaphore tickets; when we have them all          // we know the threads are done          for (int i = 0; i < count; i++)          {             boolean acquired = semaphore.tryAcquire(60, TimeUnit.SECONDS);             if (!acquired) fail("failed to acquire semaphore " + i);          }          // allow any async calls to clear          if (!sync)

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Examples of org.apache.hadoop.hbase.InterProcessLock.tryAcquire()

344 345 346 347 348 349 350 351 352 353 354     lock1.acquire();     //try to acquire, but it will timeout. We are testing whether this will cause any problems     //due to the read lock being from another client     InterProcessLock lock2 = clientLock2.writeLock(Bytes.toBytes("client2"));     assertFalse(lock2.tryAcquire(1000));     lock1.release();     //this time it will acquire     assertTrue(lock2.tryAcquire(5000));

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Examples of org.chromium.sdk.CallbackSemaphore.tryAcquire()

171 172 173 174 175 176 177 178 179 180 181     };     commandSender.sendV8CommandAsync(message, true, callbackWrapper, syncCallback);     boolean waitRes;     try {       waitRes = syncCallback.tryAcquire(timeoutMs, TimeUnit.MILLISECONDS);     } catch (RuntimeException e) {       throw new CallbackException(e);     }     if (!waitRes) {

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Examples of org.menagerie.latches.spi.ZkSemaphore.tryAcquire()

273 274 275 276 277 278 279 280 281 282 283     }     @Test(timeout = 1000l)     public void testTryAcquire() throws Exception{         DistributedSemaphore semaphore = new ZkSemaphore(2,basePath,zkSessionManager);         assertTrue("Semaphore did not acquire!",semaphore.tryAcquire());     }     @Test(timeout = 1000l)     public void testTryAcquireTimesOut() throws Exception{         final CountDownLatch latch = new CountDownLatch(1);

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