rocketMQ生產者和消費者

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">簡單寫一個MQ的生產者和消費者。生產者生產4個topic。消費者訂閱消費，多線程啓動4個線程，每個線程新建一個消費者來消費一個topic的數據。rocketMQ本身就是多線程的，設置每個消費者的線程數爲5個。例子如下：</span>

生產者代碼如下：

import javax.annotation.PreDestroy;

import com.alibaba.rocketmq.client.exception.MQClientException;
import com.alibaba.rocketmq.client.producer.DefaultMQProducer;

public class Producer {
	public static DefaultMQProducer defaultMQproducer; 
	static String rocketmqAddress ="10.20.18.20:9876";

	public static DefaultMQProducer init() {
		 if (null == defaultMQproducer){
			 defaultMQproducer = new DefaultMQProducer("messageGroup");
			 defaultMQproducer.setNamesrvAddr(rocketmqAddress);
			 defaultMQproducer.setInstanceName("messageProducer");
			 defaultMQproducer.setMaxMessageSize(9999999);
             try {
            	 defaultMQproducer.start();
			} catch (MQClientException e) {
				
			}
		 }
		return defaultMQproducer;
	}
	
@PreDestroy
public void preDestroy(){
    if (defaultMQproducer != null) {
    	defaultMQproducer.shutdown();
    }
}
}

import com.alibaba.fastjson.JSON;
import com.alibaba.rocketmq.client.producer.DefaultMQProducer;
import com.alibaba.rocketmq.client.producer.SendResult;
import com.alibaba.rocketmq.common.message.Message;




public class ProduceCar {
	public static void main(String args[]){
     
  for (int i=1;i<=4;i++){
	for (int j=1;j<=100;j++){
    Message msg = new Message("hello"+String.valueOf(i), JSON.toJSONString(i+"hello"+j).getBytes());
    DefaultMQProducer difaultProducer = Producer.init();
    try {
		SendResult sendResult = difaultProducer.send(msg);
	} catch (Exception e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} 
    }}
  System.out.println("finished");
}
}

消費者代碼如下：

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;


public class Consumer {
  public static void main(String args[]){
	   try{
	          
		   Executor executor = Executors.newFixedThreadPool(4);
	       Map<String,String> map = new HashMap();
	        int i=0;
	        map.put("hello1", "5");
	        map.put("hello2", "5");
	        map.put("hello3", "5");
	        map.put("hello4", "5");

	        for (String key : map.keySet()) {  
	            i+=1;
	           //logger.aduit("Key = {0}, Value = {1}",entry.getKey(),entry.getValue()); 
	            ConsumerFactory runComsumer = new ConsumerFactory();
	            runComsumer.setTopics(key);
	            runComsumer.setInstanceName("ConsumerInstance"+key);
	            runComsumer.setThreadNum(Integer.valueOf(map.get(key)));
	             runComsumer.setGroupName("Consumer"+key);
                 executor.execute(runComsumer);
	        }  
	       
		    }catch(Exception e){
	            System.out.println("create consumer err:{0}"+ e.getMessage());
	        }
  }
}

import java.util.List;

import com.alibaba.fastjson.JSON;
import com.alibaba.rocketmq.client.consumer.DefaultMQPushConsumer;
import com.alibaba.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext;
import com.alibaba.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import com.alibaba.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import com.alibaba.rocketmq.common.message.MessageExt;


public class ConsumerFactory extends Thread{
 
    public final static String ANDROID = "Android";
    
    public final static String IOS = "Ios";
    
    
    private String rocketmqAddress="10.20.18.20:9876";

        int threadNum;
        String topics;
        String instanceName;
        String groupName;
        DefaultMQPushConsumer consumer = null;
        @Override
        public void run() {
           
            try {
                    consumer = new DefaultMQPushConsumer(groupName);
                    consumer.setNamesrvAddr(rocketmqAddress);//MQ地址
                    consumer.setClientCallbackExecutorThreads(threadNum);//消費現場數量
                    consumer.setInstanceName(instanceName);//實例名稱
                        consumer.subscribe(topics, "*");

                   
                    //註冊監聽
                    consumer.registerMessageListener(new MessageListenerConcurrently() {
                        
                    @Override
                    public ConsumeConcurrentlyStatus consumeMessage(
                            List<MessageExt> msgs,
                            ConsumeConcurrentlyContext context) {
                        for (int i = 0; i < msgs.size(); i++) {
                            MessageExt msgExt =  msgs.get(i);
                            String msgId = msgExt.getMsgId();
                            String mesBody = new String(msgExt.getBody());
                             System.out.println(mesBody);
                        }
                        
                        return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
                    }
                });
                    consumer.start();
                    System.out.println("線程執行中");
            } catch (Exception e) {
               System.out.println(e);
            }
        }
        public int getThreadNum() {
            return threadNum;
        }
        public void setThreadNum(int threadNum) {
            this.threadNum = threadNum;
        }
        public String getTopics() {
            return topics;
        }
        public void setTopics(String topics) {
            this.topics = topics;
        }
        public String getInstanceName() {
            return instanceName;
        }
        public void setInstanceName(String instanceName) {
            this.instanceName = instanceName;
        }

        public String getGroupName() {
            return groupName;
        }

        public void setGroupName(String groupName) {
            this.groupName = groupName;
        }
        

    
}