SpringBoot2.X 整合 RocketMQ4.X
开发生产者代码
第一步:创建很普通的 SpringBoot 项目
第二步:加入相关依赖
<dependency> <groupId>org.apache.rocketmq</groupId> <artifactId>rocketmq-client</artifactId> <version>4.3.0</version> </dependency>
第三步:写代码
PayProducer 类如下所示:
package net.xdclass.xdclassmq.jms; import org.apache.rocketmq.client.exception.MQClientException; import org.apache.rocketmq.client.producer.DefaultMQProducer; import org.springframework.stereotype.Component; @Component public class PayProducer { private String producerGroup = "pay_group"; private String nameServerAddr = "192.168.0.104:9876"; private DefaultMQProducer producer; public PayProducer() { producer = new DefaultMQProducer(producerGroup); //指定NameServer地址,多个地址以 ; 隔开 //如 producer.setNamesrvAddr("192.168.100.141:9876;192.168.100.142:9876;192.168.100.149:9876"); producer.setNamesrvAddr(nameServerAddr); start(); } public DefaultMQProducer getProducer() { return this.producer; } /** * 对象在使用之前必须要调用一次,只能初始化一次 */ public void start() { try { this.producer.start(); } catch (MQClientException e) { e.printStackTrace(); } } /** * 一般在应用上下文,使用上下文监听器,进行关闭 */ public void shutdown() { this.producer.shutdown(); } }
PayController 类如下所示:
package net.xdclass.xdclassmq.controller; import net.xdclass.xdclassmq.jms.PayProducer; import org.apache.rocketmq.client.exception.MQBrokerException; import org.apache.rocketmq.client.exception.MQClientException; import org.apache.rocketmq.client.producer.SendResult; import org.apache.rocketmq.common.message.Message; import org.apache.rocketmq.remoting.exception.RemotingException; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import java.util.HashMap; @RestController public class PayController { @Autowired private PayProducer payProducer; private static final String topic = "pay_test_topic"; @RequestMapping("/api/v1/pay_cb") public Object callback(String text) throws InterruptedException, RemotingException, MQClientException, MQBrokerException { Message message = new Message(topic,"taga", ("hello rocketmq = "+text).getBytes() ); SendResult sendResult = payProducer.getProducer().send(message); System.out.println(sendResult); return new HashMap<>(); } }
第四步:测试
通过可视化管理后台查看消息
Message对象
- topic:主题名称
- tag:标签,用于过滤
- key:消息唯一标示,可以是业务字段组合
- body:消息体,字节数组
注意:发送消息到 Broker 前,需要判断是否有此 Topic。启动 Broker 的时候,本地环境建议开启自动创建 Topic,生产环境建议关闭自动化创建 Topic。建议先手工创建 Topic,如果靠程序自动创建,然后再投递消息,会出现延迟情况。自动创建topic: autoCreateTopicEnable=true 无效原因:客户端版本要和服务端版本保持一致。
概念模型: 一个 Topic 下面对应多个 Queue,可以在创建 Topic 时指定,如订单类 Topic。
常见错误一
org.apache.rocketmq.remoting.exception.RemotingTooMuchRequestException: sendDefaultImpl call timeout
原因:阿里云存在多网卡,rocketmq都会根据当前网卡选择一个IP使用,当你的机器有多块网卡时,很有可能会有问题。比如,我遇到的问题是我机器上有两个IP,一个公网IP,一个私网IP, 因此需要配置broker.conf 指定当前的公网ip, 然后重新启动broker 新增配置:conf/broker.conf (属性名称brokerIP1=broker所在的公网ip地址 ) 新增这个配置:brokerIP1=120.76.62.13 启动命令:nohup sh bin/mqbroker -n localhost:9876 -c ./conf/broker.conf &
常见错误二
MQClientException: No route info of this topic, TopicTest1 原因:Broker 禁止自动创建 Topic,且用户没有通过手工方式创建 此Topic, 或者broker和Nameserver网络不通 解决: 通过 sh bin/mqbroker -m 查看配置 autoCreateTopicEnable=true 则自动创建topic Centos7关闭防火墙 systemctl stop firewalld
常见错误三
控制台查看不了数据,提示连接 10909错误 原因:Rocket默认开启了VIP通道,VIP通道端口为10911-2=10909 解决:阿里云安全组需要增加一个端口 10909
其他错误:
https://blog.csdn.net/qq_14853889/article/details/81053145 https://blog.csdn.net/wangmx1993328/article/details/81588217#%E5%BC%82%E5%B8%B8%E8%AF%B4%E6%98%8E https://www.jianshu.com/p/bfd6d849f156 https://blog.csdn.net/wangmx1993328/article/details/81588217
开发消费者代码
接着上面的工程,直接上代码,PayConsumer 类如下所示:
package net.xdclass.xdclassmq.jms; import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer; import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext; import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus; import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently; import org.apache.rocketmq.client.exception.MQClientException; import org.apache.rocketmq.common.consumer.ConsumeFromWhere; import org.apache.rocketmq.common.message.Message; import org.apache.rocketmq.common.message.MessageExt; import org.springframework.stereotype.Component; import java.io.UnsupportedEncodingException; import java.util.List; @Component public class PayConsumer { private DefaultMQPushConsumer consumer; private String CONSUMER_GROUP = "pay_consumer_group"; private String NAME_SERVER = "192.168.0.104:9876"; private String TOPIC = "pay_test_topic"; public PayConsumer() throws MQClientException { consumer = new DefaultMQPushConsumer(CONSUMER_GROUP); consumer.setNamesrvAddr(this.NAME_SERVER); consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_LAST_OFFSET); consumer.subscribe(this.TOPIC, "*"); // consumer.registerMessageListener((MessageListenerConcurrently) (msgs, context) -> { // try { // Message msg = msgs.get(0); // System.out.printf("%s Receive New Messages: %s %n", Thread.currentThread().getName(), new String(msgs.get(0).getBody())); // String topic = msg.getTopic(); // String body = new String(msg.getBody(), "utf-8"); // String tags = msg.getTags(); // String keys = msg.getKeys(); // System.out.println("topic=" + topic + ", tags=" + tags + ", keys=" + keys + ", msg=" + body); // return ConsumeConcurrentlyStatus.CONSUME_SUCCESS; // } catch (UnsupportedEncodingException e) { // e.printStackTrace(); // return ConsumeConcurrentlyStatus.RECONSUME_LATER; // } // }); consumer.registerMessageListener(new MessageListenerConcurrently() { @Override public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs, ConsumeConcurrentlyContext context) { try { Message msg = msgs.get(0); System.out.printf("%s Receive New Messages: %s %n", Thread.currentThread().getName(), new String(msgs.get(0).getBody())); String topic = msg.getTopic(); String body = new String(msg.getBody(), "utf-8"); String tags = msg.getTags(); String keys = msg.getKeys(); System.out.println("topic=" + topic + ", tags=" + tags + ", keys=" + keys + ", msg=" + body); return ConsumeConcurrentlyStatus.CONSUME_SUCCESS; } catch (UnsupportedEncodingException e) { e.printStackTrace(); return ConsumeConcurrentlyStatus.RECONSUME_LATER; } } }); consumer.start(); System.out.println("consumer start ..."); } }
注释掉的部分采用 Lambda 表达式写法,效果是一样的。
常见问题
1、Caused by: org.apache.rocketmq.remoting.exception.RemotingConnectException: connect to <172.17.42.1:10911> failed 2、com.alibaba.rocketmq.client.exception.MQClientException: Send [1] times, still failed, cost [1647]ms, Topic: TopicTest1, BrokersSent: [broker-a, null, null] 3、org.apache.rocketmq.client.exception.MQClientException: Send [3] times, still failed, cost [497]ms, Topic: TopicTest, BrokersSent: [Book-Air.local, MacBook-Air.local, MacBook-Air.local] 解决:多网卡问题处理 1、设置producer: producer.setVipChannelEnabled(false); 2、编辑ROCKETMQ 配置文件:broker.conf(下列ip为自己的ip) namesrvAddr = 192.168.0.101:9876 brokerIP1 = 192.168.0.101 4、DESC: service not available now, maybe disk full, CL: 解决:修改启动脚本runbroker.sh,在里面增加一句话即可: JAVA_OPT="${JAVA_OPT} -Drocketmq.broker.diskSpaceWarningLevelRatio=0.98" (磁盘保护的百分比设置成98%,只有磁盘空间使用率达到98%时才拒绝接收producer消息) 常见问题处理 https://blog.csdn.net/sqzhao/article/details/54834761 https://blog.csdn.net/mayifan0/article/details/67633729 https://blog.csdn.net/a906423355/article/details/78192828
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