[ISSUE #2219] Add some asynchronous API for batch messages (#2315)

* [ISSUE #2219] Add asynchronous batch send method.

* modify the ut
Co-authored-by: Nzhangjidi2016 <zhangjidi@cmss.chinamobile.com>

client/src/main/java/org/apache/rocketmq/client/producer/DefaultMQProducer.java

@@ -916,6 +916,29 @@ public class DefaultMQProducer extends ClientConfig implements MQProducer {
         long timeout) throws MQClientException, RemotingException, MQBrokerException, InterruptedException {
         return this.defaultMQProducerImpl.send(batch(msgs), messageQueue, timeout);
     }
+    
+    @Override
+    public void send(Collection<Message> msgs, SendCallback sendCallback) throws MQClientException, RemotingException, MQBrokerException, InterruptedException {
+        this.defaultMQProducerImpl.send(batch(msgs), sendCallback);
+    }
+    
+    @Override
+    public void send(Collection<Message> msgs, SendCallback sendCallback,
+        long timeout) throws MQClientException, RemotingException, MQBrokerException, InterruptedException {
+        this.defaultMQProducerImpl.send(batch(msgs), sendCallback, timeout);
+    }
+    
+    @Override
+    public void send(Collection<Message> msgs, MessageQueue mq,
+        SendCallback sendCallback) throws MQClientException, RemotingException, MQBrokerException, InterruptedException {
+        this.defaultMQProducerImpl.send(batch(msgs), queueWithNamespace(mq), sendCallback);
+    }
+    
+    @Override
+    public void send(Collection<Message> msgs, MessageQueue mq,
+        SendCallback sendCallback, long timeout) throws MQClientException, RemotingException, MQBrokerException, InterruptedException {
+        this.defaultMQProducerImpl.send(batch(msgs), queueWithNamespace(mq), sendCallback, timeout);
+    }
 
     /**
      * Sets an Executor to be used for executing callback methods. If the Executor is not set, {@link

client/src/main/java/org/apache/rocketmq/client/producer/MQProducer.java

@@ -99,7 +99,19 @@ public interface MQProducer extends MQAdmin {
 
     SendResult send(final Collection<Message> msgs, final MessageQueue mq, final long timeout)
         throws MQClientException, RemotingException, MQBrokerException, InterruptedException;
-
+    
+    void send(final Collection<Message> msgs, final SendCallback sendCallback) throws MQClientException, RemotingException, MQBrokerException,
+        InterruptedException;
+    
+    void send(final Collection<Message> msgs, final SendCallback sendCallback, final long timeout) throws MQClientException, RemotingException,
+        MQBrokerException, InterruptedException;
+    
+    void send(final Collection<Message> msgs, final MessageQueue mq, final SendCallback sendCallback) throws MQClientException, RemotingException,
+        MQBrokerException, InterruptedException;
+    
+    void send(final Collection<Message> msgs, final MessageQueue mq, final SendCallback sendCallback, final long timeout) throws MQClientException,
+        RemotingException, MQBrokerException, InterruptedException;
+    
     //for rpc
     Message request(final Message msg, final long timeout) throws RequestTimeoutException, MQClientException,
         RemotingException, MQBrokerException, InterruptedException;

client/src/test/java/org/apache/rocketmq/client/producer/DefaultMQProducerTest.java

@@ -232,6 +232,51 @@ public class DefaultMQProducerTest {
         countDownLatch.await(3000L, TimeUnit.MILLISECONDS);
         assertThat(cc.get()).isEqualTo(5);
     }
+    
+    @Test
+    public void testBatchSendMessageAsync()
+            throws RemotingException, MQClientException, InterruptedException, MQBrokerException {
+        final AtomicInteger cc = new AtomicInteger(0);
+        final CountDownLatch countDownLatch = new CountDownLatch(4);
+
+        when(mQClientAPIImpl.getTopicRouteInfoFromNameServer(anyString(), anyLong())).thenReturn(createTopicRoute());
+        SendCallback sendCallback = new SendCallback() {
+            @Override
+            public void onSuccess(SendResult sendResult) {
+                countDownLatch.countDown();
+            }
+
+            @Override
+            public void onException(Throwable e) {
+                e.printStackTrace();
+                cc.incrementAndGet();
+                countDownLatch.countDown();
+            }
+        };
+        MessageQueueSelector messageQueueSelector = new MessageQueueSelector() {
+            @Override
+            public MessageQueue select(List<MessageQueue> mqs, Message msg, Object arg) {
+                return null;
+            }
+        };
+
+        List<Message> msgs = new ArrayList<>();
+        for (int i = 0; i < 5; i++) {
+            Message message = new Message();
+            message.setTopic("test");
+            message.setBody(("hello world" + i).getBytes());
+            msgs.add(message);
+        }
+        producer.send(msgs, sendCallback);
+        producer.send(msgs, sendCallback, 1000);
+        MessageQueue mq = new MessageQueue("test", "BrokerA", 1);
+        producer.send(msgs, mq, sendCallback);
+        // this message is send failed
+        producer.send(msgs, new MessageQueue(), sendCallback, 1000);
+
+        countDownLatch.await(3000L, TimeUnit.MILLISECONDS);
+        assertThat(cc.get()).isEqualTo(1);
+    }
 
     @Test
     public void testSendMessageAsync_BodyCompressed() throws RemotingException, InterruptedException, MQBrokerException, MQClientException {