Examples of com.hazelcast.core.MultiMap

com.hazelcast.core.MultiMap
A specialized map whose keys can be associated with multiple values.

Gotchas:
- Methods, including but not limited to get, containsKey, containsValue, remove, put, lock, unlock, do not use hashCode and equals implementations of keys, instead they use hashCode and equals of binary (serialized) forms of the objects.
- Methods, including but not limited to get, remove, keySet, values, entrySet, return a collection clone of the values. The collection is NOT backed by the map, so changes to the map are NOT reflected in the collection, and vice-versa.
@author oztalip @see IMap

    }


    @Test(expected = NullPointerException.class)
    public void testContainsKey_whenNullKey() throws InterruptedException {
        TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory(1);
        MultiMap multiMap = getMultiMap(factory.newInstances(), randomString());


        multiMap.containsKey(null);
    }

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    }


    @Test(expected = NullPointerException.class)
    public void testContainsValue_whenNullKey() throws InterruptedException {
        TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory(1);
        MultiMap multiMap = getMultiMap(factory.newInstances(), randomString());


        multiMap.containsValue(null);
    }

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    }


    @Test(expected = NullPointerException.class)
    public void testContainsEntry_whenNullKey() throws InterruptedException {
        TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory(1);
        MultiMap multiMap = getMultiMap(factory.newInstances(), randomString());


        multiMap.containsEntry(null, "someVal");
    }

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    }


    @Test(expected = NullPointerException.class)
    public void testContainsEntry_whenNullValue() throws InterruptedException {
        TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory(1);
        MultiMap multiMap = getMultiMap(factory.newInstances(), randomString());


        multiMap.containsEntry("someVal", null);
    }

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    @Test
    public void testMultiMapPutGetRemove() {
        final HazelcastInstance instance = createHazelcastInstance();


        MultiMap mm = instance.getMultiMap("testMultiMapPutGetRemove");
        mm.put("1", "C");
        mm.put("2", "x");
        mm.put("2", "y");
        mm.put("1", "A");
        mm.put("1", "B");
        Collection g1 = mm.get("1");
        assertTrue(g1.contains("A"));
        assertTrue(g1.contains("B"));
        assertTrue(g1.contains("C"));
        assertEquals(5, mm.size());
        assertTrue(mm.remove("1", "C"));
        assertEquals(4, mm.size());
        Collection g2 = mm.get("1");
        assertTrue(g2.contains("A"));
        assertTrue(g2.contains("B"));
        assertFalse(g2.contains("C"));
        Collection r1 = mm.remove("2");
        assertTrue(r1.contains("x"));
        assertTrue(r1.contains("y"));
        assertNotNull(mm.get("2"));
        assertTrue(mm.get("2").isEmpty());
        assertEquals(2, mm.size());
        Collection r2 = mm.remove("1");
        assertTrue(r2.contains("A"));
        assertTrue(r2.contains("B"));
        assertNotNull(mm.get("1"));
        assertTrue(mm.get("1").isEmpty());
        assertEquals(0, mm.size());
    }

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     * Issue 818
     */
    public void testMultiMapWithCustomSerializable() {
        final HazelcastInstance instance = createHazelcastInstance();


        MultiMap map = instance.getMultiMap("testMultiMapWithCustomSerializable");
        map.put("1", new CustomSerializable());
        assertEquals(1, map.size());
        map.remove("1");
        assertEquals(0, map.size());
    }

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    @Test
    public void testMultiMapPutRemoveWithTxn() {
        final HazelcastInstance instance = createHazelcastInstance();
        MultiMap multiMap = instance.getMultiMap("testMultiMapPutRemoveWithTxn");


        multiMap.put("1", "C");
        multiMap.put("2", "x");
        multiMap.put("2", "y");


        final TransactionContext context = instance.newTransactionContext();
        context.beginTransaction();
        TransactionalMultiMap txnMap = context.getMultiMap("testMultiMapPutRemoveWithTxn");
        txnMap.put("1", "A");
        txnMap.put("1", "B");
        Collection g1 = txnMap.get("1");
        assertTrue(g1.contains("A"));
        assertTrue(g1.contains("B"));
        assertTrue(g1.contains("C"));
        assertTrue(txnMap.remove("1", "C"));
        assertEquals(4, txnMap.size());
        Collection g2 = txnMap.get("1");
        assertTrue(g2.contains("A"));
        assertTrue(g2.contains("B"));
        assertFalse(g2.contains("C"));
        Collection r1 = txnMap.remove("2");
        assertTrue(r1.contains("x"));
        assertTrue(r1.contains("y"));
        assertEquals(0, txnMap.get("2").size());
        Collection r2 = txnMap.remove("1");
        assertEquals(2, r2.size());
        assertTrue(r2.contains("A"));
        assertTrue(r2.contains("B"));
        assertEquals(0, txnMap.get("1").size());
        assertEquals(0, txnMap.size());
        assertEquals(3, multiMap.size());
        context.commitTransaction();
        assertEquals(0, multiMap.size());
    }

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        assertFalse(mm.containsEntry("NOT_THERE", "value1"));
    }


    @Test(expected = UnsupportedOperationException.class)
    public void testGetLocalMultiMapStats() {
        final MultiMap mm = client.getMultiMap(randomString());
        mm.getLocalMultiMapStats();
    }

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        mm.getLocalMultiMapStats();
    }


    @Test
    public void testClear() {
        final MultiMap mm = client.getMultiMap(randomString());
        final int maxKeys = 9;
        final int maxValues = 3;


        for ( int key=0; key< maxKeys; key++ ){
            for ( int val=0; val< maxValues; val++ ){
                mm.put(key, val);
            }
        }
        mm.clear();
        assertEquals(0, mm.size());
    }

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        Hazelcast.shutdownAll();
    }


    @Test
    public void testIsLocked_whenNotLocked() throws Exception {
        final MultiMap mm = client.getMultiMap(randomString());
        final Object key = "KeyNotLocked";
        final boolean result = mm.isLocked(key);
        assertFalse(result);
    }

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Related Classes of com.hazelcast.core.MultiMap

com.hazelcast.client.impl.client.txn.ClientTxnMultiMapTest

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com.hazelcast.client.multimap.ClientMultiMapLockTest

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