List of usage examples for org.springframework.amqp.rabbit.connection CachingConnectionFactory setCacheMode
public void setCacheMode(CacheMode cacheMode)
From source file:org.springframework.amqp.rabbit.connection.CachingConnectionFactoryTests.java
@Test public void testConnectionLimit() throws Exception { com.rabbitmq.client.ConnectionFactory mockConnectionFactory = mock( com.rabbitmq.client.ConnectionFactory.class); com.rabbitmq.client.Connection mockConnection = mock(com.rabbitmq.client.Connection.class); when(mockConnectionFactory.newConnection(any(ExecutorService.class), anyString())) .thenReturn(mockConnection); when(mockConnection.isOpen()).thenReturn(true); final CachingConnectionFactory ccf = new CachingConnectionFactory(mockConnectionFactory); ccf.setExecutor(mock(ExecutorService.class)); ccf.setCacheMode(CacheMode.CONNECTION); ccf.setConnectionCacheSize(1);/*from w w w . ja va 2s. com*/ ccf.setConnectionLimit(1); ccf.setChannelCheckoutTimeout(10); Connection con1 = ccf.createConnection(); try { ccf.createConnection(); fail("Exception expected"); } catch (AmqpTimeoutException e) { } // should be ignored, and added to cache con1.close(); Connection con2 = ccf.createConnection(); assertSame(con1, con2); final CountDownLatch latch2 = new CountDownLatch(1); final CountDownLatch latch1 = new CountDownLatch(1); final AtomicReference<Connection> connection = new AtomicReference<Connection>(); ccf.setChannelCheckoutTimeout(30000); Executors.newSingleThreadExecutor().execute(() -> { latch1.countDown(); connection.set(ccf.createConnection()); latch2.countDown(); }); assertTrue(latch1.await(10, TimeUnit.SECONDS)); Thread.sleep(100); con2.close(); assertTrue(latch2.await(10, TimeUnit.SECONDS)); assertSame(con2, connection.get()); ccf.destroy(); }
From source file:org.springframework.amqp.rabbit.connection.CachingConnectionFactoryTests.java
private void testCheckoutsWithRefreshedConnectionGuts(CacheMode mode) throws Exception { com.rabbitmq.client.ConnectionFactory mockConnectionFactory = mock( com.rabbitmq.client.ConnectionFactory.class); com.rabbitmq.client.Connection mockConnection1 = mock(com.rabbitmq.client.Connection.class); com.rabbitmq.client.Connection mockConnection2 = mock(com.rabbitmq.client.Connection.class); Channel mockChannel1 = mock(Channel.class); Channel mockChannel2 = mock(Channel.class); Channel mockChannel3 = mock(Channel.class); Channel mockChannel4 = mock(Channel.class); when(mockConnectionFactory.newConnection(any(ExecutorService.class), anyString())) .thenReturn(mockConnection1, mockConnection2); when(mockConnection1.createChannel()).thenReturn(mockChannel1, mockChannel2); when(mockConnection1.isOpen()).thenReturn(true); when(mockConnection2.createChannel()).thenReturn(mockChannel3, mockChannel4); when(mockConnection2.isOpen()).thenReturn(true); when(mockChannel1.isOpen()).thenReturn(true); when(mockChannel2.isOpen()).thenReturn(true); when(mockChannel3.isOpen()).thenReturn(true); when(mockChannel4.isOpen()).thenReturn(true); CachingConnectionFactory ccf = new CachingConnectionFactory(mockConnectionFactory); ccf.setExecutor(mock(ExecutorService.class)); ccf.setChannelCacheSize(2);//from ww w . jav a2 s . c o m ccf.setChannelCheckoutTimeout(10); ccf.setCacheMode(mode); ccf.addConnectionListener(connection -> { try { // simulate admin connection.createChannel(false).close(); } catch (Exception e) { fail(e.getMessage()); } }); Connection con = ccf.createConnection(); Channel channel1 = con.createChannel(false); assertEquals(1, ((Semaphore) TestUtils.getPropertyValue(ccf, "checkoutPermits", Map.class).values() .iterator().next()).availablePermits()); channel1.close(); con.close(); assertEquals(2, ((Semaphore) TestUtils.getPropertyValue(ccf, "checkoutPermits", Map.class).values() .iterator().next()).availablePermits()); when(mockConnection1.isOpen()).thenReturn(false); when(mockChannel1.isOpen()).thenReturn(false); when(mockChannel2.isOpen()).thenReturn(false); con.createChannel(false).close(); con = ccf.createConnection(); con.createChannel(false).close(); con.createChannel(false).close(); con.createChannel(false).close(); con.createChannel(false).close(); con.createChannel(false).close(); verify(mockConnection1, times(1)).createChannel(); verify(mockConnection2, times(2)).createChannel(); con.close(); verify(mockConnection2, never()).close(); assertEquals(2, ((Semaphore) TestUtils.getPropertyValue(ccf, "checkoutPermits", Map.class).values() .iterator().next()).availablePermits()); ccf.destroy(); assertEquals(2, ((Semaphore) TestUtils.getPropertyValue(ccf, "checkoutPermits", Map.class).values() .iterator().next()).availablePermits()); }
From source file:org.springframework.amqp.rabbit.connection.CachingConnectionFactoryTests.java
@Test public void testWithConnectionFactoryCachedConnection() throws Exception { com.rabbitmq.client.ConnectionFactory mockConnectionFactory = mock( com.rabbitmq.client.ConnectionFactory.class); final List<com.rabbitmq.client.Connection> mockConnections = new ArrayList<com.rabbitmq.client.Connection>(); final List<Channel> mockChannels = new ArrayList<Channel>(); doAnswer(new Answer<com.rabbitmq.client.Connection>() { private int connectionNumber; @Override//from w w w .j a v a 2s. com public com.rabbitmq.client.Connection answer(InvocationOnMock invocation) throws Throwable { com.rabbitmq.client.Connection connection = mock(com.rabbitmq.client.Connection.class); doAnswer(new Answer<Channel>() { private int channelNumber; @Override public Channel answer(InvocationOnMock invocation) throws Throwable { Channel channel = mock(Channel.class); when(channel.isOpen()).thenReturn(true); int channelNumnber = ++this.channelNumber; when(channel.toString()) .thenReturn("mockChannel" + connectionNumber + ":" + channelNumnber); mockChannels.add(channel); return channel; } }).when(connection).createChannel(); int connectionNumber = ++this.connectionNumber; when(connection.toString()).thenReturn("mockConnection" + connectionNumber); when(connection.isOpen()).thenReturn(true); mockConnections.add(connection); return connection; } }).when(mockConnectionFactory).newConnection(any(ExecutorService.class), anyString()); CachingConnectionFactory ccf = new CachingConnectionFactory(mockConnectionFactory); ccf.setExecutor(mock(ExecutorService.class)); ccf.setCacheMode(CacheMode.CONNECTION); ccf.afterPropertiesSet(); Set<?> allocatedConnections = TestUtils.getPropertyValue(ccf, "allocatedConnections", Set.class); assertEquals(0, allocatedConnections.size()); BlockingQueue<?> idleConnections = TestUtils.getPropertyValue(ccf, "idleConnections", BlockingQueue.class); assertEquals(0, idleConnections.size()); final AtomicReference<com.rabbitmq.client.Connection> createNotification = new AtomicReference<com.rabbitmq.client.Connection>(); final AtomicReference<com.rabbitmq.client.Connection> closedNotification = new AtomicReference<com.rabbitmq.client.Connection>(); ccf.setConnectionListeners(Collections.singletonList(new ConnectionListener() { @Override public void onCreate(Connection connection) { assertNull(createNotification.get()); createNotification.set(targetDelegate(connection)); } @Override public void onClose(Connection connection) { assertNull(closedNotification.get()); closedNotification.set(targetDelegate(connection)); } })); Connection con1 = ccf.createConnection(); verifyConnectionIs(mockConnections.get(0), con1); assertEquals(1, allocatedConnections.size()); assertEquals(0, idleConnections.size()); assertNotNull(createNotification.get()); assertSame(mockConnections.get(0), createNotification.getAndSet(null)); Channel channel1 = con1.createChannel(false); verifyChannelIs(mockChannels.get(0), channel1); channel1.close(); //AMQP-358 verify(mockChannels.get(0), never()).close(); con1.close(); // should be ignored, and placed into connection cache. verify(mockConnections.get(0), never()).close(); assertEquals(1, allocatedConnections.size()); assertEquals(1, idleConnections.size()); assertNull(closedNotification.get()); /* * will retrieve same connection that was just put into cache, and reuse single channel from cache as well */ Connection con2 = ccf.createConnection(); verifyConnectionIs(mockConnections.get(0), con2); Channel channel2 = con2.createChannel(false); verifyChannelIs(mockChannels.get(0), channel2); channel2.close(); verify(mockChannels.get(0), never()).close(); con2.close(); verify(mockConnections.get(0), never()).close(); assertEquals(1, allocatedConnections.size()); assertEquals(1, idleConnections.size()); assertNull(createNotification.get()); /* * Now check for multiple connections/channels */ con1 = ccf.createConnection(); verifyConnectionIs(mockConnections.get(0), con1); con2 = ccf.createConnection(); verifyConnectionIs(mockConnections.get(1), con2); channel1 = con1.createChannel(false); verifyChannelIs(mockChannels.get(0), channel1); channel2 = con2.createChannel(false); verifyChannelIs(mockChannels.get(1), channel2); assertEquals(2, allocatedConnections.size()); assertEquals(0, idleConnections.size()); assertNotNull(createNotification.get()); assertSame(mockConnections.get(1), createNotification.getAndSet(null)); // put mock1 in cache channel1.close(); verify(mockChannels.get(1), never()).close(); con1.close(); verify(mockConnections.get(0), never()).close(); assertEquals(2, allocatedConnections.size()); assertEquals(1, idleConnections.size()); assertNull(closedNotification.get()); Connection con3 = ccf.createConnection(); assertNull(createNotification.get()); verifyConnectionIs(mockConnections.get(0), con3); Channel channel3 = con3.createChannel(false); verifyChannelIs(mockChannels.get(0), channel3); assertEquals(2, allocatedConnections.size()); assertEquals(0, idleConnections.size()); channel2.close(); con2.close(); assertEquals(2, allocatedConnections.size()); assertEquals(1, idleConnections.size()); channel3.close(); con3.close(); assertEquals(2, allocatedConnections.size()); assertEquals(2, idleConnections.size()); assertEquals("1", ccf.getCacheProperties().get("openConnections")); /* * Cache size is 1; con3 (mock1) should have been a real close. * con2 (mock2) should still be in the cache. */ verify(mockConnections.get(0)).close(30000); assertNotNull(closedNotification.get()); assertSame(mockConnections.get(0), closedNotification.getAndSet(null)); verify(mockChannels.get(1), never()).close(); verify(mockConnections.get(1), never()).close(30000); verify(mockChannels.get(1), never()).close(); verifyConnectionIs(mockConnections.get(1), idleConnections.iterator().next()); /* * Now a closed cached connection */ when(mockConnections.get(1).isOpen()).thenReturn(false); when(mockChannels.get(1).isOpen()).thenReturn(false); con3 = ccf.createConnection(); assertNotNull(closedNotification.get()); assertSame(mockConnections.get(1), closedNotification.getAndSet(null)); verifyConnectionIs(mockConnections.get(2), con3); assertNotNull(createNotification.get()); assertSame(mockConnections.get(2), createNotification.getAndSet(null)); assertEquals(2, allocatedConnections.size()); assertEquals(1, idleConnections.size()); assertEquals("1", ccf.getCacheProperties().get("openConnections")); channel3 = con3.createChannel(false); verifyChannelIs(mockChannels.get(2), channel3); channel3.close(); con3.close(); assertNull(closedNotification.get()); assertEquals(2, allocatedConnections.size()); assertEquals(2, idleConnections.size()); assertEquals("1", ccf.getCacheProperties().get("openConnections")); /* * Now a closed cached connection when creating a channel */ con3 = ccf.createConnection(); verifyConnectionIs(mockConnections.get(2), con3); assertNull(createNotification.get()); assertEquals(2, allocatedConnections.size()); assertEquals(1, idleConnections.size()); when(mockConnections.get(2).isOpen()).thenReturn(false); channel3 = con3.createChannel(false); assertNotNull(closedNotification.getAndSet(null)); assertNotNull(createNotification.getAndSet(null)); verifyChannelIs(mockChannels.get(3), channel3); channel3.close(); con3.close(); assertNull(closedNotification.get()); assertEquals(2, allocatedConnections.size()); assertEquals(2, idleConnections.size()); assertEquals("1", ccf.getCacheProperties().get("openConnections")); // destroy ccf.destroy(); assertNotNull(closedNotification.get()); verify(mockConnections.get(3)).close(30000); }
From source file:org.springframework.amqp.rabbit.connection.CachingConnectionFactoryTests.java
@Test public void testWithConnectionFactoryCachedConnectionAndChannels() throws Exception { com.rabbitmq.client.ConnectionFactory mockConnectionFactory = mock( com.rabbitmq.client.ConnectionFactory.class); final List<com.rabbitmq.client.Connection> mockConnections = new ArrayList<com.rabbitmq.client.Connection>(); final List<Channel> mockChannels = new ArrayList<Channel>(); doAnswer(new Answer<com.rabbitmq.client.Connection>() { private int connectionNumber; @Override// w w w . j av a 2 s . com public com.rabbitmq.client.Connection answer(InvocationOnMock invocation) throws Throwable { com.rabbitmq.client.Connection connection = mock(com.rabbitmq.client.Connection.class); doAnswer(new Answer<Channel>() { private int channelNumber; @Override public Channel answer(InvocationOnMock invocation) throws Throwable { Channel channel = mock(Channel.class); when(channel.isOpen()).thenReturn(true); int channelNumnber = ++this.channelNumber; when(channel.toString()) .thenReturn("mockChannel" + connectionNumber + ":" + channelNumnber); mockChannels.add(channel); return channel; } }).when(connection).createChannel(); int connectionNumber = ++this.connectionNumber; when(connection.toString()).thenReturn("mockConnection" + connectionNumber); when(connection.isOpen()).thenReturn(true); mockConnections.add(connection); return connection; } }).when(mockConnectionFactory).newConnection(any(ExecutorService.class), anyString()); CachingConnectionFactory ccf = new CachingConnectionFactory(mockConnectionFactory); ccf.setExecutor(mock(ExecutorService.class)); ccf.setCacheMode(CacheMode.CONNECTION); ccf.setConnectionCacheSize(2); ccf.setChannelCacheSize(2); ccf.afterPropertiesSet(); Set<?> allocatedConnections = TestUtils.getPropertyValue(ccf, "allocatedConnections", Set.class); assertEquals(0, allocatedConnections.size()); BlockingQueue<?> idleConnections = TestUtils.getPropertyValue(ccf, "idleConnections", BlockingQueue.class); assertEquals(0, idleConnections.size()); @SuppressWarnings("unchecked") Map<?, List<?>> cachedChannels = TestUtils.getPropertyValue(ccf, "allocatedConnectionNonTransactionalChannels", Map.class); final AtomicReference<com.rabbitmq.client.Connection> createNotification = new AtomicReference<com.rabbitmq.client.Connection>(); final AtomicReference<com.rabbitmq.client.Connection> closedNotification = new AtomicReference<com.rabbitmq.client.Connection>(); ccf.setConnectionListeners(Collections.singletonList(new ConnectionListener() { @Override public void onCreate(Connection connection) { assertNull(createNotification.get()); createNotification.set(targetDelegate(connection)); } @Override public void onClose(Connection connection) { assertNull(closedNotification.get()); closedNotification.set(targetDelegate(connection)); } })); Connection con1 = ccf.createConnection(); verifyConnectionIs(mockConnections.get(0), con1); assertEquals(1, allocatedConnections.size()); assertEquals(0, idleConnections.size()); assertNotNull(createNotification.get()); assertSame(mockConnections.get(0), createNotification.getAndSet(null)); Channel channel1 = con1.createChannel(false); verifyChannelIs(mockChannels.get(0), channel1); channel1.close(); //AMQP-358 verify(mockChannels.get(0), never()).close(); con1.close(); // should be ignored, and placed into connection cache. verify(mockConnections.get(0), never()).close(); assertEquals(1, allocatedConnections.size()); assertEquals(1, idleConnections.size()); assertEquals(1, cachedChannels.get(con1).size()); assertNull(closedNotification.get()); /* * will retrieve same connection that was just put into cache, and reuse single channel from cache as well */ Connection con2 = ccf.createConnection(); verifyConnectionIs(mockConnections.get(0), con2); Channel channel2 = con2.createChannel(false); verifyChannelIs(mockChannels.get(0), channel2); channel2.close(); verify(mockChannels.get(0), never()).close(); con2.close(); verify(mockConnections.get(0), never()).close(); assertEquals(1, allocatedConnections.size()); assertEquals(1, idleConnections.size()); assertNull(createNotification.get()); /* * Now check for multiple connections/channels */ con1 = ccf.createConnection(); verifyConnectionIs(mockConnections.get(0), con1); con2 = ccf.createConnection(); verifyConnectionIs(mockConnections.get(1), con2); channel1 = con1.createChannel(false); verifyChannelIs(mockChannels.get(0), channel1); channel2 = con2.createChannel(false); verifyChannelIs(mockChannels.get(1), channel2); assertEquals(2, allocatedConnections.size()); assertEquals(0, idleConnections.size()); assertNotNull(createNotification.get()); assertSame(mockConnections.get(1), createNotification.getAndSet(null)); // put mock1 in cache channel1.close(); verify(mockChannels.get(1), never()).close(); con1.close(); verify(mockConnections.get(0), never()).close(); assertEquals(2, allocatedConnections.size()); assertEquals(1, idleConnections.size()); assertNull(closedNotification.get()); Connection con3 = ccf.createConnection(); assertNull(createNotification.get()); verifyConnectionIs(mockConnections.get(0), con3); Channel channel3 = con3.createChannel(false); verifyChannelIs(mockChannels.get(0), channel3); assertEquals(2, allocatedConnections.size()); assertEquals(0, idleConnections.size()); channel2.close(); con2.close(); assertEquals(2, allocatedConnections.size()); assertEquals(1, idleConnections.size()); channel3.close(); con3.close(); assertEquals(2, allocatedConnections.size()); assertEquals(2, idleConnections.size()); assertEquals(1, cachedChannels.get(con1).size()); assertEquals(1, cachedChannels.get(con2).size()); /* * Cache size is 2; neither should have been a real close. * con2 (mock2) and con1 should still be in the cache. */ verify(mockConnections.get(0), never()).close(30000); assertNull(closedNotification.get()); verify(mockChannels.get(1), never()).close(); verify(mockConnections.get(1), never()).close(30000); verify(mockChannels.get(1), never()).close(); assertEquals(2, idleConnections.size()); Iterator<?> iterator = idleConnections.iterator(); verifyConnectionIs(mockConnections.get(1), iterator.next()); verifyConnectionIs(mockConnections.get(0), iterator.next()); /* * Now a closed cached connection */ when(mockConnections.get(1).isOpen()).thenReturn(false); con3 = ccf.createConnection(); assertNotNull(closedNotification.get()); assertSame(mockConnections.get(1), closedNotification.getAndSet(null)); verifyConnectionIs(mockConnections.get(0), con3); assertNull(createNotification.get()); assertEquals(2, allocatedConnections.size()); assertEquals(1, idleConnections.size()); channel3 = con3.createChannel(false); verifyChannelIs(mockChannels.get(0), channel3); channel3.close(); con3.close(); assertNull(closedNotification.get()); assertEquals(2, allocatedConnections.size()); assertEquals(2, idleConnections.size()); /* * Now a closed cached connection when creating a channel */ con3 = ccf.createConnection(); verifyConnectionIs(mockConnections.get(0), con3); assertNull(createNotification.get()); assertEquals(2, allocatedConnections.size()); assertEquals(1, idleConnections.size()); when(mockConnections.get(0).isOpen()).thenReturn(false); channel3 = con3.createChannel(false); assertNotNull(closedNotification.getAndSet(null)); assertNotNull(createNotification.getAndSet(null)); verifyChannelIs(mockChannels.get(2), channel3); channel3.close(); con3.close(); assertNull(closedNotification.get()); assertEquals(2, allocatedConnections.size()); assertEquals(2, idleConnections.size()); Connection con4 = ccf.createConnection(); assertSame(con3, con4); assertEquals(1, idleConnections.size()); Channel channelA = con4.createChannel(false); Channel channelB = con4.createChannel(false); Channel channelC = con4.createChannel(false); channelA.close(); assertEquals(1, cachedChannels.get(con4).size()); channelB.close(); assertEquals(2, cachedChannels.get(con4).size()); channelC.close(); assertEquals(2, cachedChannels.get(con4).size()); // destroy ccf.destroy(); assertNotNull(closedNotification.get()); // physical wasn't invoked, because this mockConnection marked with 'false' for 'isOpen()' verify(mockConnections.get(0)).close(30000); verify(mockConnections.get(1)).close(30000); verify(mockConnections.get(2)).close(30000); }
From source file:org.springframework.amqp.rabbit.connection.CachingConnectionFactoryTests.java
@Test public void testWithConnectionFactoryCachedConnectionIdleAreClosed() throws Exception { com.rabbitmq.client.ConnectionFactory mockConnectionFactory = mock( com.rabbitmq.client.ConnectionFactory.class); final List<com.rabbitmq.client.Connection> mockConnections = new ArrayList<com.rabbitmq.client.Connection>(); final List<Channel> mockChannels = new ArrayList<Channel>(); doAnswer(new Answer<com.rabbitmq.client.Connection>() { private int connectionNumber; @Override//www .ja v a 2 s . co m public com.rabbitmq.client.Connection answer(InvocationOnMock invocation) throws Throwable { com.rabbitmq.client.Connection connection = mock(com.rabbitmq.client.Connection.class); doAnswer(new Answer<Channel>() { private int channelNumber; @Override public Channel answer(InvocationOnMock invocation) throws Throwable { Channel channel = mock(Channel.class); when(channel.isOpen()).thenReturn(true); int channelNumnber = ++this.channelNumber; when(channel.toString()).thenReturn("mockChannel" + channelNumnber); mockChannels.add(channel); return channel; } }).when(connection).createChannel(); int connectionNumber = ++this.connectionNumber; when(connection.toString()).thenReturn("mockConnection" + connectionNumber); when(connection.isOpen()).thenReturn(true); mockConnections.add(connection); return connection; } }).when(mockConnectionFactory).newConnection(any(ExecutorService.class), anyString()); CachingConnectionFactory ccf = new CachingConnectionFactory(mockConnectionFactory); ccf.setExecutor(mock(ExecutorService.class)); ccf.setCacheMode(CacheMode.CONNECTION); ccf.setConnectionCacheSize(5); ccf.afterPropertiesSet(); Set<?> allocatedConnections = TestUtils.getPropertyValue(ccf, "allocatedConnections", Set.class); assertEquals(0, allocatedConnections.size()); BlockingQueue<?> idleConnections = TestUtils.getPropertyValue(ccf, "idleConnections", BlockingQueue.class); assertEquals(0, idleConnections.size()); Connection conn1 = ccf.createConnection(); Connection conn2 = ccf.createConnection(); Connection conn3 = ccf.createConnection(); assertEquals(3, allocatedConnections.size()); assertEquals(0, idleConnections.size()); conn1.close(); conn2.close(); conn3.close(); assertEquals(3, allocatedConnections.size()); assertEquals(3, idleConnections.size()); when(mockConnections.get(0).isOpen()).thenReturn(false); when(mockConnections.get(1).isOpen()).thenReturn(false); Connection conn4 = ccf.createConnection(); assertEquals(3, allocatedConnections.size()); assertEquals(2, idleConnections.size()); assertSame(conn3, conn4); conn4.close(); assertEquals(3, allocatedConnections.size()); assertEquals(3, idleConnections.size()); assertEquals("1", ccf.getCacheProperties().get("openConnections")); ccf.destroy(); assertEquals(3, allocatedConnections.size()); assertEquals(3, idleConnections.size()); assertEquals("0", ccf.getCacheProperties().get("openConnections")); }
From source file:org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainerTests.java
@SuppressWarnings("unchecked") @Test//from w ww . ja v a 2s .co m public void testWithConnectionPerListenerThread() throws Exception { com.rabbitmq.client.ConnectionFactory mockConnectionFactory = mock( com.rabbitmq.client.ConnectionFactory.class); com.rabbitmq.client.Connection mockConnection1 = mock(com.rabbitmq.client.Connection.class); com.rabbitmq.client.Connection mockConnection2 = mock(com.rabbitmq.client.Connection.class); Channel mockChannel1 = mock(Channel.class); Channel mockChannel2 = mock(Channel.class); when(mockConnectionFactory.newConnection(any(ExecutorService.class), anyString())) .thenReturn(mockConnection1).thenReturn(mockConnection2).thenReturn(null); when(mockConnection1.createChannel()).thenReturn(mockChannel1).thenReturn(null); when(mockConnection2.createChannel()).thenReturn(mockChannel2).thenReturn(null); when(mockChannel1.isOpen()).thenReturn(true); when(mockConnection1.isOpen()).thenReturn(true); when(mockChannel2.isOpen()).thenReturn(true); when(mockConnection2.isOpen()).thenReturn(true); CachingConnectionFactory ccf = new CachingConnectionFactory(mockConnectionFactory); ccf.setCacheMode(CacheMode.CONNECTION); SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(ccf); container.setConcurrentConsumers(2); container.setQueueNames("foo"); container.afterPropertiesSet(); CountDownLatch latch1 = new CountDownLatch(2); CountDownLatch latch2 = new CountDownLatch(2); doAnswer(messageToConsumer(mockChannel1, container, false, latch1)).when(mockChannel1).basicConsume( anyString(), anyBoolean(), anyString(), anyBoolean(), anyBoolean(), anyMap(), any(Consumer.class)); doAnswer(messageToConsumer(mockChannel2, container, false, latch1)).when(mockChannel2).basicConsume( anyString(), anyBoolean(), anyString(), anyBoolean(), anyBoolean(), anyMap(), any(Consumer.class)); doAnswer(messageToConsumer(mockChannel1, container, true, latch2)).when(mockChannel1) .basicCancel(anyString()); doAnswer(messageToConsumer(mockChannel2, container, true, latch2)).when(mockChannel2) .basicCancel(anyString()); container.start(); assertTrue(latch1.await(10, TimeUnit.SECONDS)); Set<?> consumers = TestUtils.getPropertyValue(container, "consumers", Map.class).keySet(); container.stop(); assertTrue(latch2.await(10, TimeUnit.SECONDS)); waitForConsumersToStop(consumers); Set<?> allocatedConnections = TestUtils.getPropertyValue(ccf, "allocatedConnections", Set.class); assertEquals(2, allocatedConnections.size()); assertEquals("1", ccf.getCacheProperties().get("openConnections")); }