Examples of ILock

com.hazelcast.core.ILock
Distributed implementation of {@link Lock}. @see Lock
net.mcft.copy.betterstorage.api.lock.ILock
org.apache.aurora.scheduler.storage.entities.ILock
org.eclipse.core.runtime.jobs.ILock
do work here ... } finally { lock.release(); } Note: although lock.acquire should never fail, it is good practice to place it inside the try block anyway. Releasing without acquiring is far less catastrophic than acquiring without releasing.
This interface is not intended to be implemented by clients.
@see IJobManager#newLock() @since 3.0
xbird.util.concurrent.lock.ILock

@author Makoto YUI (yuin405+xbird@gmail.com)

Examples of com.hazelcast.core.ILock


    @Test(timeout = 60000)
    public void testTryLock_whenMultipleThreads() throws InterruptedException {
        HazelcastInstance instance = createHazelcastInstance();
        final AtomicInteger atomicInteger = new AtomicInteger(0);
        final ILock lock = instance.getLock("testSimpleUsage");


        lock.lock();


        Runnable tryLockRunnable = new Runnable() {
            public void run() {
                if (lock.tryLock()) {
                    atomicInteger.incrementAndGet();
                }
            }
        };


        Thread thread1 = new Thread(tryLockRunnable);
        thread1.start();
        thread1.join();
        assertEquals(0, atomicInteger.get());


        lock.unlock();
        Thread thread2 = new Thread(tryLockRunnable);
        thread2.start();
        thread2.join();


        assertEquals(1, atomicInteger.get());
        assertTrue(lock.isLocked());
        assertFalse(lock.isLockedByCurrentThread());
    }

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Examples of com.hazelcast.core.ILock

    }


    @Test(timeout = 60000)
    public void testLockUnlock() {
        HazelcastInstance instance = createHazelcastInstance();
        final ILock lock = instance.getLock(randomString());


        assertFalse(lock.isLocked());


        lock.lock();
        assertTrue(lock.isLocked());
        lock.unlock();


        assertFalse(lock.isLocked());
    }

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Examples of com.hazelcast.core.ILock

    }


    @Test(timeout = 60000)
    public void testTryLock() {
        HazelcastInstance instance = createHazelcastInstance();
        final ILock lock = instance.getLock(randomString());


        assertFalse(lock.isLocked());


        assertTrue(lock.tryLock());
        lock.unlock();
        assertFalse(lock.isLocked());
    }

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Examples of com.hazelcast.core.ILock

    }


    @Test(timeout = 60000, expected = DistributedObjectDestroyedException.class)
    public void testDestroyLockWhenOtherWaitingOnLock() throws InterruptedException {
        final HazelcastInstance instance = createHazelcastInstance();
        final ILock lock = instance.getLock("testLockDestroyWhenWaitingLock");
        Thread t = new Thread(new Runnable() {
            public void run() {
                lock.lock();
            }
        });
        t.start();
        t.join();


        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                lock.destroy();
            }
        }).start();


        lock.lock();


    }

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Examples of com.hazelcast.core.ILock

            key = generateKeyOwnedBy(instance);
        } else {
            key = generateKeyNotOwnedBy(instance);
        }


        final ILock lock = instance.getLock(key);
        Thread thread = new Thread(new Runnable() {
            public void run() {
                lock.lock();
            }
        });
        thread.start();
        thread.join();
        new Thread(new Runnable() {
            public void run() {
                try {
                    Thread.sleep(3000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                instance.shutdown();
            }
        }).start();
        lock.lock();
    }

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Examples of com.hazelcast.core.ILock

            key = generateKeyOwnedBy(instance1);
        } else {
            key = generateKeyNotOwnedBy(instance1);
        }


        final ILock lock = instance1.getLock(key);
        lock.lock(10, TimeUnit.SECONDS);
        assertTrue(lock.getRemainingLeaseTime() > 0);
        assertTrue(lock.isLocked());


        final CountDownLatch latch = new CountDownLatch(1);
        Thread t = new Thread(new Runnable() {
            public void run() {
                final ILock lock = instance2.getLock(key);
                lock.lock();
                latch.countDown();


            }
        });
        t.start();

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Examples of com.hazelcast.core.ILock


    @Test
    public void testLockCount() throws Exception {
        HazelcastInstance instance = createHazelcastInstance();


        ILock lock = instance.getLock(randomString());
        lock.lock();
        assertEquals(1, lock.getLockCount());
        assertTrue(lock.tryLock());
        assertEquals(2, lock.getLockCount());


        lock.unlock();
        assertEquals(1, lock.getLockCount());
        assertTrue(lock.isLocked());


        lock.unlock();
        assertEquals(0, lock.getLockCount());
        assertFalse(lock.isLocked());
        assertEquals(-1L, lock.getRemainingLeaseTime());
    }

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Examples of com.hazelcast.core.ILock

        final TestHazelcastInstanceFactory nodeFactory = createHazelcastInstanceFactory(3);
        final HazelcastInstance h1 = nodeFactory.newHazelcastInstance();
        final HazelcastInstance h2 = nodeFactory.newHazelcastInstance();
        final HazelcastInstance h3 = nodeFactory.newHazelcastInstance();
        final String key = "testLockIsLocked";
        final ILock lock = h1.getLock(key);
        final ILock lock2 = h2.getLock(key);


        assertFalse(lock.isLocked());
        assertFalse(lock2.isLocked());
        lock.lock();
        assertTrue(lock.isLocked());
        assertTrue(lock2.isLocked());


        final CountDownLatch latch = new CountDownLatch(1);
        final CountDownLatch latch2 = new CountDownLatch(1);


        Thread thread = new Thread(new Runnable() {
            public void run() {
                ILock lock3 = h3.getLock(key);
                assertTrue(lock3.isLocked());
                try {
                    latch2.countDown();
                    while (lock3.isLocked()) {
                        Thread.sleep(100);
                    }
                    latch.countDown();
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);

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Examples of com.hazelcast.core.ILock

        final HazelcastInstance instance1 = nodeFactory.newHazelcastInstance();
        final HazelcastInstance instance2 = nodeFactory.newHazelcastInstance();


        final String key = randomString();


        final ILock lock = instance1.getLock(key);
        lock.lock();
        assertTrue(lock.isLocked());
        assertTrue(lock.isLockedByCurrentThread());


        assertTrue(lock.tryLock());
        assertTrue(lock.isLocked());
        assertTrue(lock.isLockedByCurrentThread());


        final AtomicBoolean result = new AtomicBoolean();
        final Thread thread = new Thread() {
            public void run() {
                result.set(lock.isLockedByCurrentThread());
            }
        };
        thread.start();
        thread.join();
        assertFalse(result.get());


        lock.unlock();
        assertTrue(lock.isLocked());
        assertTrue(lock.isLockedByCurrentThread());
    }

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Examples of com.hazelcast.core.ILock

        TestHazelcastInstanceFactory nodeFactory = createHazelcastInstanceFactory(2);
        HazelcastInstance lockOwner = nodeFactory.newHazelcastInstance();
        final HazelcastInstance instance1 = nodeFactory.newHazelcastInstance();


        final String name = randomString();
        final ILock lock = lockOwner.getLock(name);
        lock.lock();
        assertTrue(lock.isLocked());
        final CountDownLatch latch = new CountDownLatch(1);
        Thread t = new Thread(new Runnable() {
            public void run() {
                final ILock lock = instance1.getLock(name);
                lock.lock();
                latch.countDown();


            }
        });
        t.start();

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