rocketMQ生产者和消费者

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">简单写一个MQ的生产者和消费者。生产者生产4个topic。消费者订阅消费，多线程启动4个线程，每个线程新建一个消费者来消费一个topic的数据。rocketMQ本身就是多线程的，设置每个消费者的线程数为5个。例子如下：</span>

生产者代码如下：

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;}@PreDestroypublic 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 blocke.printStackTrace();}     }}  System.out.println("finished");}}

消费者代码如下：

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);//消费现场数量                    consumer.setInstanceName(instanceName);//实例名称                        consumer.subscribe(topics, "*");                                       //注册监听                    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("线程执行中");            } 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;        }            }