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

com.hazelcast.core.MultiMap.lock()
Acquires the lock for the specified key.
If the lock is not available then the current thread becomes disabled for thread scheduling purposes and lies dormant until the lock has been acquired.
Scope of the lock is this multimap only. Acquired lock is only for the key in this multimap.
Locks are re-entrant so if the key is locked N times then it should be unlocked N times before another thread can acquire it.

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.


    @Test(expected = IllegalArgumentException.class)
    public void testLockTTL_whenNegativeTimeout() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());
        final Object key = "Key";
        mm.lock(key, -1, TimeUnit.MILLISECONDS);
    }


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

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    @Test
    public void testLockTTL_whenLockedBySelf() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());
        final Object key = "Key";
        mm.lock(key);
        mm.lock(key, 30, TimeUnit.SECONDS);
        assertTrue(mm.isLocked(key));
    }


    @Test

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    @Test
    public void testLockTTL_whenLockedBySelf() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());
        final Object key = "Key";
        mm.lock(key);
        mm.lock(key, 30, TimeUnit.SECONDS);
        assertTrue(mm.isLocked(key));
    }


    @Test
    public void testLockTTLExpired() throws Exception {

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    @Test
    public void testLockTTLExpired() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());
        final Object key = "Key";


        mm.lock(key, 1, TimeUnit.SECONDS);
        sleepSeconds(2);
        assertFalse(mm.isLocked(key));
    }


    @Test

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    @Test
    public void testLockTTLExpired_whenLockedBySelf() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());
        final Object key = "Key";


        mm.lock(key);
        mm.lock(key, 1, TimeUnit.SECONDS);
        sleepSeconds(2);
        assertFalse(mm.isLocked(key));
    }

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    public void testLockTTLExpired_whenLockedBySelf() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());
        final Object key = "Key";


        mm.lock(key);
        mm.lock(key, 1, TimeUnit.SECONDS);
        sleepSeconds(2);
        assertFalse(mm.isLocked(key));
    }


    @Test

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    @Test
    public void testLockTTLExpires_thenOtherThreadCanObtain() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());
        final Object key = "Key";


        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)) {

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