微服务的架构越来越流行, 很多老旧项目面临着解耦重构, 复杂项目的解耦通常会引入一些中间件来帮助我们更好的完成工作, 本章, 我们就来通过实例了解下消息中间件的用法.
因为鱼哥的项目上了阿里的云, 所以选择很简单, 就用RocketMQ即可, 看官们根据实际情况择优选择.
注意, 本文使用了4.0sdk,截止到文章发表, ali已推出5.0SDK
关于阿里的RocketMQ的介绍官方有详细的文档, 这里就不啰嗦了
官方已SDK提供了简单的接入方式, 需要注意的是, 官方提供了两种协议的SDK
HTTP协议
采用RESTful风格,方便易用,快速接入,跨网络能力强. 支持Java、C++、.NET、Go、Python、Node.js和PHP七种语言客户端
TCP协议
区别于HTTP简单的接入方式,提供更为专业、可靠、稳定的TCP协议的SDK接入服务. 支持的语言包括Java、C/C++ 以及.NET
注意, 使用的话需要自费开通对应的服务, 通过后才能使用, 大部分管理功能都能在阿里云的控制台中找到.
下面我们就springboot来实际使用下RocketMQ.
为了较好的使用, 我们同时演示tcp何http两种方式
pom引入依赖
com.aliyun.openservices
ons-client
${ali-mq-tcp.version}
com.aliyun.mq
mq-http-sdk
${ali-mq-http.version}
jar-with-dependencies
定义mq配置类
@Getter
@Setter
@Component
@ConfigurationProperties(prefix = "aliyun.rocketmq.tcp")
public class MqTcpProperties {
//AccessKey ID,身份验证,在RAM控制台创建
private String accessKeyId;
//AccessKey Secret,身份验证,在RAM控制台创建
private String accessKeySecret;
//实例TCP协议接入地址(内网)
private String nameSrvAddr;
//发送超时时间: 3s
private String sendMsgTimeoutMillis = "3000";
//线程数目:默认20
private String consumeThreadNums = "20";
//订阅方式: 集群
private String messageModel = "CLUSTERING";
public Properties getMqProperties() {
Properties properties = new Properties();
properties.setProperty(PropertyKeyConst.AccessKey, this.accessKeyId);
properties.setProperty(PropertyKeyConst.SecretKey, this.accessKeySecret);
properties.setProperty(PropertyKeyConst.NAMESRV_ADDR, this.nameSrvAddr);
// 设置发送超时时间,单位毫秒
properties.setProperty(PropertyKeyConst.SendMsgTimeoutMillis, this.sendMsgTimeoutMillis);
// 设置消费者线程数为20个(默认20)
properties.setProperty(PropertyKeyConst.ConsumeThreadNums, this.consumeThreadNums);
// 订阅方式设置
properties.put(PropertyKeyConst.MessageModel, this.messageModel);
return properties;
}
}
定义Topic配置类
@Getter
@Setter
@Configuration
@ConfigurationProperties(prefix = "aliyun.rocketmq.tcp")
public class MqTcpTopicProperties {
private String topic;
private String groupId;
private String tag;
}
封装一个工具类
@Slf4j
public class MqTcpUtil {
@Autowired
private ProducerBean producer;
@Autowired
private MqTcpProperties mqTcpProperties;
@Autowired
private MqTcpTopicProperties mqTcpTopicProperties;
private ConsumerBean consumerBean;
/**
* 同步发送消息 - 配置默认topic
*
* @param msgTag 标签,可用于消息小分类标注
* @param messageBody 消息body内容,生产者自定义内容
* @param msgKey 消息key值,建议设置全局唯一,可不传,不影响消息投递
* @return success:SendResult or error:null
*/
public SendResult sendMsg(String msgTag, String messageBody, String msgKey) {
Message msg = new Message(mqTcpTopicProperties.getTopic(), msgTag, msgKey, messageBody.getBytes());
return this.send(msg, Boolean.FALSE);
}
/**
* 同步发送消息 - 配置默认topic - 重试次数
*
* @param msgTag 标签,可用于消息小分类标注
* @param messageBody 消息body内容,生产者自定义内容
* @param msgKey 消息key值,建议设置全局唯一,可不传,不影响消息投递
* @param retryTimes 重试次数,注意实际请求次数为 retryTimes + 1
* @return success:SendResult or error:null
*/
public SendResult sendMsg(String msgTag, String messageBody, String msgKey, Integer retryTimes) {
Message msg = new Message(mqTcpTopicProperties.getTopic(), msgTag, msgKey, messageBody.getBytes());
SendResult result = this.send(msg, Boolean.FALSE);
if (ObjectUtil.isNotEmpty(result) || retryTimes == 0) {
return result;
}
return this.sendMsg(msgTag, messageBody, msgKey, --retryTimes);
}
/**
* 同步发送消息
*
* @param topic topic名
* @param msgTag 标签,可用于消息小分类标注
* @param messageBody 消息body内容,生产者自定义内容
* @param msgKey 消息key值,建议设置全局唯一,可不传,不影响消息投递
* @return success:SendResult or error:null
*/
public SendResult sendMsg(String topic, String msgTag, String messageBody, String msgKey) {
Message msg = new Message(topic, msgTag, msgKey, messageBody.getBytes());
return this.send(msg, Boolean.FALSE);
}
/**
* 同步发送单向消息
*
* @param topic topic名
* @param msgTag 标签,可用于消息小分类标注
* @param messageBody 消息body内容,生产者自定义内容
* @param msgKey 消息key值,建议设置全局唯一,可不传,不影响消息投递
*/
public void sendOneWayMsg(String topic, String msgTag, String messageBody, String msgKey) {
Message msg = new Message(topic, msgTag, msgKey, messageBody.getBytes());
this.send(msg, Boolean.TRUE);
}
/**
* 发送普通消息
*
* @param msg 消息
* @param isOneWay 是否单向发送
*/
private SendResult send(Message msg, Boolean isOneWay) {
try {
if (isOneWay) {
//由于在 oneway 方式发送消息时没有请求应答处理,一旦出现消息发送失败,则会因为没有重试而导致数据丢失。
//若数据不可丢,建议选用同步或异步发送方式。
producer.sendOneway(msg);
success(msg, "单向消息MsgId不返回");
return null;
} else {
//可靠同步发送
SendResult sendResult = producer.send(msg);
//获取发送结果,不抛异常即发送成功
assert sendResult != null;
success(msg, sendResult.getMessageId());
return sendResult;
}
} catch (Exception e) {
error(msg, e);
return null;
}
}
/**
* 成功日志打印
*
* @param msg
* @param messageId
*/
private void success(Message msg, String messageId) {
log.info("发送MQ消息成功 -- Topic:{} ,msgId:{} , Key:{}, tag:{}, body:{}"
, msg.getTopic(), messageId, msg.getKey(), msg.getTag(), new String(msg.getBody()));
}
/**
* 异常日志打印
*
* @param msg
* @param e
*/
private void error(Message msg, Exception e) {
log.error("发送MQ消息失败-- Topic:{}, Key:{}, tag:{}, body:{}"
, msg.getTopic(), msg.getKey(), msg.getTag(), new String(msg.getBody()));
log.error("errorMsg", e);
}
@PostConstruct
public void init() {
log.info("[Init] tcp consumerBean init");
consumerBean = new ConsumerBean();
}
public ConsumerBean getConsumer() {
return consumerBean;
}
public ConsumerBean getDefaultConsumer(MessageListener messageListener) {
//配置文件
Properties properties = mqTcpProperties.getMqProperties();
//消费者
properties.setProperty(PropertyKeyConst.GROUP_ID, mqTcpTopicProperties.getGroupId());
//设置消费者线程数为20个(默认20)
properties.setProperty(PropertyKeyConst.ConsumeThreadNums, mqTcpProperties.getConsumeThreadNums());
// 广播订阅方式设置
properties.put(PropertyKeyConst.MessageModel, mqTcpProperties.getMessageModel());
consumerBean.setProperties(properties);
//订阅消息
Map subscriptionTable = new HashMap<>();
//订阅消息
Subscription smsSubscription = new Subscription();
smsSubscription.setTopic(mqTcpTopicProperties.getTopic());
smsSubscription.setExpression(mqTcpTopicProperties.getTag());
subscriptionTable.put(smsSubscription, messageListener);
consumerBean.setSubscriptionTable(subscriptionTable);
return consumerBean;
}
}
自动注入类
/**
* rocketMq服务自动配置类
* 业务系统要使用rocketMq服务服务,需要在配置文件中增加如下配置
* 【
* aliyun.rocketmq.tcp.enable=true
* aliyun.rocketmq.tcp.accessKeyId=
* aliyun.rocketmq.tcp.accessKeySecret=
* aliyun.rocketmq.tcp.nameSrvAddr=
* aliyun.rocketmq.tcp.default.topic=
* aliyun.rocketmq.tcp.default.groupId=
* aliyun.rocketmq.tcp.default.tag=
*/
@Slf4j
@Configuration
@EnableConfigurationProperties({MqTcpProperties.class, MqTcpTopicProperties.class})
@ConditionalOnClass({ProducerBean.class, ConsumerBean.class})
@ConditionalOnProperty(prefix = "aliyun.rocketmq.tcp", value = "enable", havingValue = "true")
public class MqTcpDefaultAutoConfiguration {
@Autowired
private MqTcpProperties mqTcpProperties;
@PostConstruct
public void init() {
log.info("[Auto Config] MqTcpDefaultAutoConfiguration loading......");
}
@Bean(initMethod = "start", destroyMethod = "shutdown")
@ConditionalOnMissingBean
public ProducerBean buildProducer() {
ProducerBean producer = new ProducerBean();
producer.setProperties(mqTcpProperties.getMqProperties());
return producer;
}
@Bean
public MqTcpUtil mqTcpUtil() {
return new MqTcpUtil();
}
}
核心功能基本完成, 我们可以通过MqTcpUtil执行消息的发送了
新增个测试类
@Test
public void mqTcpTest() {
// 自定义一条body内容
JSONObject body = new JSONObject();
UUID uuid = UUID.randomUUID();
body.put("notice", "这是一条tcp通知类信息");
//同步发送消息-不带返回值的(一般使用该方法)
log.info(String.valueOf(mqTcpUtil.sendMsg("topic", "tag_dev", body.toJSONString(), String.valueOf(uuid))));
}
最后我们加上Ali RocketMq的配置即可
## AK
aliyun.rocketmq.tcp.enable=true
aliyun.rocketmq.tcp.accessKeyId=
aliyun.rocketmq.tcp.accessKeySecret=
## TCP
aliyun.rocketmq.tcp.nameSrvAddr=
aliyun.rocketmq.tcp.sendMsgTimeoutMillis=3000
aliyun.rocketmq.tcp.consumeThreadNums=20
aliyun.rocketmq.tcp.messageModel=CLUSTERING
## topic
aliyun.rocketmq.tcp.topic=
aliyun.rocketmq.tcp.groupId=
aliyun.rocketmq.tcp.tag=
以上完成了核心功能的接入与开发, 我们已经能正常发送MQ消息了, 通俗点讲就是生产者就绪了, 我们还需要消费者去消费这些消息.
合理的拆分是生产者和消费者分服务部署, 这里为了演示, 鱼哥就直接自产自销了.
定义消费者监听器MqMessageListener
@Slf4j
@Component
public class MqMessageListener implements MessageListener {
@Override
public Action consume(Message message, ConsumeContext context) {
log.info("接收到MQ详细信息:{}", message);
log.info("解析MQ-Body自定义内容:{}", new String(message.getBody()));
try {
//do something..
return Action.CommitMessage;
} catch (Exception e) {
log.error("消费MQ消息失败,msgId:" + message.getMsgID() + ",ExceptionMsg:" + e.getMessage());
return Action.ReconsumeLater;
}
}
}
申明消费者类, 这里我们定义两种消费者, 一种是默认配置的, 一种是主定义配置的,两者选一即可
@Component
public class MqConsumerClient {
// @Autowired
// private MqTcpProperties mqTcpProperties;
@Autowired
private MqMessageListener mqMessageListener;
// @Autowired
// private MqTcpTopicProperties mqTcpTopicProperties;
@Autowired
private MqTcpUtil mqTcpUtil;
// //自定义消费者
// @Bean(initMethod = "start", destroyMethod = "shutdown")
// public ConsumerBean messageBuildConsumer() {
// ConsumerBean consumerBean = mqTcpUtil.getConsumer();
// //配置文件
// Properties properties = mqTcpProperties.getMqProperties();
// //消费者
// properties.setProperty(PropertyKeyConst.GROUP_ID, mqTopicProperties.getGroupId());
// //设置消费者线程数为20个(默认20)
// properties.setProperty(PropertyKeyConst.ConsumeThreadNums, "20");
// consumerBean.setProperties(properties);
// //订阅消息
// Map subscriptionTable = new HashMap<>();
// // 广播订阅方式设置
// properties.put(PropertyKeyConst.MessageModel, PropertyValueConst.BROADCASTING);
// //订阅消息
// Subscription smsSubscription = new Subscription();
// smsSubscription.setTopic(mqTopicProperties.getTopic());
// smsSubscription.setExpression(mqTopicProperties.getTag());
// subscriptionTable.put(smsSubscription, mqMessageListener);
// consumerBean.setSubscriptionTable(subscriptionTable);
// return consumerBean;
// }
// 默认消费者
@Bean(initMethod = "start", destroyMethod = "shutdown")
public ConsumerBean defaultConsumer() {
ConsumerBean consumerBean = mqTcpUtil.getDefaultConsumer(mqMessageListener);
return consumerBean;
}
}
最后启动服务, 即可看到消息消费的输出信息
定义mq配置类
@Getter
@Setter
@Configuration
@ConfigurationProperties(prefix = "aliyun.rocketmq.http")
public class MqHttpProperties {
//AccessKey ID,身份验证,在RAM控制台创建
private String accessKeyId;
//AccessKey Secret,身份验证,在RAM控制台创建
private String accessKeySecret;
//实例TCP协议接入地址(内网)
private String nameSrvAddr;
//实例TCP协议接入地址(内网)
private String sendMsgTimeoutMillis = "3000";
//线程数目:默认20
private String consumeThreadNums = "20";
//线程数目:默认20
private String messageModel = "CLUSTERING";
public Properties getMqProperties() {
Properties properties = new Properties();
properties.setProperty(PropertyKeyConst.AccessKey, this.accessKeyId);
properties.setProperty(PropertyKeyConst.SecretKey, this.accessKeySecret);
properties.setProperty(PropertyKeyConst.NAMESRV_ADDR, this.nameSrvAddr);
// 设置发送超时时间,单位毫秒
properties.setProperty(PropertyKeyConst.SendMsgTimeoutMillis, this.sendMsgTimeoutMillis);
// 设置消费者线程数为20个(默认20)
properties.setProperty(PropertyKeyConst.ConsumeThreadNums, this.consumeThreadNums);
// 广播订阅方式设置
properties.put(PropertyKeyConst.MessageModel, this.messageModel);
return properties;
}
定义Topic配置类
@Getter
@Setter
@Configuration
@ConfigurationProperties(prefix = "aliyun.rocketmq.http")
public class MqHttpTopicProperties {
private String topic;
private String groupId;
private String tag;
}
定义操作工具类
@Slf4j
public class MqHttpUtil {
@Autowired
private MqHttpProperties mqHttpProperties;
@Autowired
private MqHttpTopicProperties mqHttpTopicProperties;
private MQProducer producer;
private MQConsumer consumer;
private MQClient mqClient;
@PostConstruct
public void init() {
log.info("[Init] http producer init");
mqClient = new MQClient(
// 设置HTTP协议客户端接入点,进入消息队列RocketMQ版控制台实例详情页面的接入点区域查看。
mqHttpProperties.getNameSrvAddr(),
// AccessKey ID,身份验证,在阿里云RAM控制台创建。
mqHttpProperties.getAccessKeyId(),
// AccessKey Secret,身份验证,在阿里云RAM控制台创建。
mqHttpProperties.getAccessKeySecret()
);
}
/**
* 同步发送消息
*
* @param topic topic名
* @param msgTag 标签,可用于消息小分类标注
* @param messageBody 消息body内容,生产者自定义内容
* @param msgKey 消息key值,建议设置全局唯一,可不传,不影响消息投递
* @return success:SendResult or error:null
*/
public TopicMessage sendMsg(String topic, String msgTag, String messageBody, String msgKey) {
producer = mqClient.getProducer(topic);
TopicMessage msg = new TopicMessage(
messageBody.getBytes(),
msgTag);
msg.setMessageId(msgKey);
try {
//可靠同步发送
TopicMessage sendResult = producer.publishMessage(msg);
//获取发送结果,不抛异常即发送成功
assert sendResult != null;
success(topic, msg);
return sendResult;
} catch (Exception e) {
error(topic, msg, e);
return null;
}
}
public MQClient getMqClient() {
return mqClient;
}
public MQConsumer getDefaultConsumer() {
consumer = mqClient.getConsumer(mqHttpTopicProperties.getTopic(), mqHttpTopicProperties.getGroupId(), mqHttpTopicProperties.getTag());
return consumer;
}
/**
* 成功日志打印
*
* @param msg
*/
private void success(String topic, TopicMessage msg) {
log.info("发送MQ消息成功 -- Topic:{} ,msgId:{} , tag:{}, body:{}"
, topic, msg.getMessageId(), msg.getMessageTag(), msg.getMessageBodyString());
}
/**
* 异常日志打印
*
* @param msg
* @param e
*/
private void error(String topic, TopicMessage msg, Exception e) {
log.error("发送MQ消息失败-- Topic:{}, msgId:{}, tag:{}, body:{}"
, topic, msg.getMessageId(), msg.getMessageTag(), msg.getMessageBodyString());
log.error("errorMsg", e);
}
自动注入
/**
* rocketMq服务自动配置类
* 业务系统要使用rocketMq服务服务,需要在配置文件中增加如下配置
* 【
* aliyun.rocketmq.http.enable=true
* aliyun.rocketmq.http.accessKeyId=
* aliyun.rocketmq.http.accessKeySecret=
* aliyun.rocketmq.http.nameSrvAddr=
* aliyun.rocketmq.http.default.topic=
* aliyun.rocketmq.http.default.groupId=
* aliyun.rocketmq.http.default.tag=
*/
@Slf4j
@Configuration
@ConditionalOnProperty(prefix = "aliyun.rocketmq.http", value = "enable", havingValue = "true")
public class MqHttpDefaultAutoConfiguration {
@PostConstruct
public void init() {
log.info("[Auto Config] MqHttpDefaultAutoConfiguration loading......");
}
@Bean
public MqHttpUtil mqHttpUtil() {
return new MqHttpUtil();
}
}
最后测试下
@Test
public void mqHttpTest() {
// 自定义一条body内容
JSONObject body = new JSONObject();
UUID uuid = UUID.randomUUID();
body.put("notice", "这是一条http通知类信息");
//同步发送消息-不带返回值的(一般使用该方法)
log.info(String.valueOf(mqHttpUtil.sendMsg("topic", "tag_dev", body.toJSONString(), String.valueOf(uuid))));
}
最后增加配置
#***********************MQ-http*********************************
## AK
aliyun.rocketmq.http.enable=true
aliyun.rocketmq.http.accessKeyId=
aliyun.rocketmq.http.accessKeySecret=
## HTTP
aliyun.rocketmq.http.nameSrvAddr=
aliyun.rocketmq.http.sendMsgTimeoutMillis=3000
aliyun.rocketmq.http.consumeThreadNums=20
aliyun.rocketmq.http.messageModel=CLUSTERING
## topic
aliyun.rocketmq.http.topic=topic
aliyun.rocketmq.http.groupId=group_dev
aliyun.rocketmq.http.tag=tag_dev
注意: 案例需要配置你自己申请的RocketMQ配置,否则无法启动.
https://github.com/MrCoderStack/SpringBootDemo/tree/master/sb-alibaba-rocketmq