Examples of com.hazelcast.core.MultiMap.tryLock()

com.hazelcast.core.MultiMap.tryLock()
Tries to acquire the lock for the specified key.
If the lock is not available then the current thread doesn't wait and returns false immediately.

Warning:

This method uses hashCode and equals of binary form of the key, not the actual implementations of hashCode and equals defined in key's class.
@param key key to lock. @return true if lock is acquired, false otherwise.


    @Test
    public void testTryLock() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());
        Object key = "key";
        assertTrue(mm.tryLock(key));
    }


    @Test(expected = NullPointerException.class)
    public void testTryLock_whenNullKey() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());

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    }


    @Test(expected = NullPointerException.class)
    public void testTryLock_whenNullKey() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());
        mm.tryLock(null);
    }


    @Test
    public void testTryLock_whenLockedBySelf() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());

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    @Test
    public void testTryLock_whenLockedBySelf() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());
        final Object key = "Key";
        mm.lock(key);
        assertTrue(mm.tryLock(key));
    }


    @Test
    public void testTryLock_whenLockedByOther() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());

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        final Object key = "Key1";
        mm.lock(key);
        final CountDownLatch tryLockFailed = new CountDownLatch(1);
        new Thread() {
            public void run() {
                if (mm.tryLock(key) == false) {
                    tryLockFailed.countDown();
                }
            }
        }.start();
        assertOpenEventually(tryLockFailed);

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        final CountDownLatch tryLockReturnsTrue = new CountDownLatch(1);
        new Thread(){
            public void run() {
                try {
                    if(mm.tryLock(key, 10, TimeUnit.SECONDS)){
                        tryLockReturnsTrue.countDown();
                    }
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

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        mm.lock(key, 2, TimeUnit.SECONDS);
        final CountDownLatch tryLockSuccess = new CountDownLatch(1);
        new Thread() {
            public void run() {
                try {
                    if (mm.tryLock(key, 4, TimeUnit.SECONDS)) {
                        tryLockSuccess.countDown();
                    }
                } catch (InterruptedException e) {
                    fail(e.getMessage());
                }

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