rocketmq异步批量发送消息

关键点，自己调用batch生产消息

package org.apache.rocketmq.example.batch;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import org.apache.rocketmq.client.Validators;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.client.producer.DefaultMQProducer;
import org.apache.rocketmq.client.producer.SendCallback;
import org.apache.rocketmq.client.producer.SendResult;
import org.apache.rocketmq.common.message.Message;
import org.apache.rocketmq.common.message.MessageBatch;
import org.apache.rocketmq.common.message.MessageClientIDSetter;

public class SimpleBatchProducer {

    public static void main(String[] args) throws Exception {
        DefaultMQProducer producer = new DefaultMQProducer("BatchProducerGroupName");
        producer.setSendMsgTimeout(10*60*1000);
        
        producer.setNamesrvAddr("127.0.0.1:9876");
        producer.start();

        //If you just send messages of no more than 1MiB at a time, it is easy to use batch
        //Messages of the same batch should have: same topic, same waitStoreMsgOK and no schedule support
        String topic = "BatchTest";
        List<Message> messages = new ArrayList<>();
        messages.add(new Message(topic, "Tag", "OrderID001", "Hello world 0".getBytes()));
        messages.add(new Message(topic, "Tag", "OrderID002", "Hello world 1".getBytes()));
        messages.add(new Message(topic, "Tag", "OrderID003", "Hello world 2".getBytes()));
        MessageBatch batchMessage=batch(messages,producer);
         producer.send(batchMessage, new SendCallback() {
            @Override
            public void onSuccess(SendResult sendResult) {
               
                System.out.println(sendResult);
                producer.shutdown();
            }

            @Override
            public void onException(Throwable e) {
               
                System.out.println(e);
                e.printStackTrace();
                producer.shutdown();
            }
        });
         
         
        
    }
    
    private static MessageBatch batch(Collection<Message> msgs,DefaultMQProducer defaultMQProducer) throws MQClientException {
        MessageBatch msgBatch;
        try {
            msgBatch = MessageBatch.generateFromList(msgs);
            for (Message message : msgBatch) {
                Validators.checkMessage(message, defaultMQProducer);
                MessageClientIDSetter.setUniqID(message);
            }
            msgBatch.setBody(msgBatch.encode());
        } catch (Exception e) {
            throw new MQClientException("Failed to initiate the MessageBatch", e);
        }
        return msgBatch;
    }

}