SpringBoot 中 使用RabbtiMq
如图使用redisTemplate 一样的简单方便
模拟发送邮件的情况
pom.xml
application.properties
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest
spring.rabbitmq.host=192.168.91.128
spring.rabbitmq.port=5672
## 根据自己情况而定，可以不用
spring.rabbitmq.listener.simple.acknowledge-mode=manual
spring.rabbitmq.listener.simple.prefetch=100
写在配置文件中，由 RabbitProperties 这个类进行读取，封装到ConnectionFactory 中。
MailConstants （常量）
public class MailConstants {
public static final Integer DELIVERING = 0;//消息投递中
public static final Integer SUCCESS = 1;//消息投递成功
public static final Integer FAILURE = 2;//消息投递失败
public static final Integer MAX_TRY_COUNT = 3;//最大重试次数
public static final Integer MSG_TIMEOUT = 1;//消息超时时间
public static final String MAIL_QUEUE_NAME = "javaboy.mail.queue";
public static final String MAIL_EXCHANGE_NAME = "javaboy.mail.exchange";
public static final String MAIL_ROUTING_KEY_NAME = "javaboy.mail.routing.key";
}
RabbitConfig （rabbitMq的配置类）
import org.javaboy.vhr.model.MailConstants;
import org.javaboy.vhr.service.MailSendLogService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.DirectExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class RabbitConfig {
public final static Logger logger = LoggerFactory.getLogger(RabbitConfig.class);
@Autowired
CachingConnectionFactory cachingConnectionFactory;
//发送邮件的
@Autowired
MailSendLogService mailSendLogService;
@Bean
RabbitTemplate rabbitTemplate() {
RabbitTemplate rabbitTemplate = new RabbitTemplate(cachingConnectionFactory);
//手动应答返回的标志
rabbitTemplate.setConfirmCallback((data, ack, cause) -> {
String msgId = data.getId();
if (ack) {
logger.info(msgId + ":消息发送成功");
mailSendLogService.updateMailSendLogStatus(msgId, 1);//修改数据库中的记录，消息投递成功
} else {
logger.info(msgId + ":消息发送失败");
}
});
rabbitTemplate.setReturnCallback((msg, repCode, repText, exchange, routingkey) -> {
logger.info("消息发送失败");
});
return rabbitTemplate;
}
@Bean
Queue mailQueue() {
return new Queue(MailConstants.MAIL_QUEUE_NAME, true);
}
@Bean
DirectExchange mailExchange() {
return new DirectExchange(MailConstants.MAIL_EXCHANGE_NAME, true, false);
}
@Bean
Binding mailBinding() {
return BindingBuilder.bind(mailQueue()).to(mailExchange()).with(MailConstants.MAIL_ROUTING_KEY_NAME);
}
}
MailSendTask（定时任务,发送）
@Component
public class MailSendTask {
@Autowired
MailSendLogService mailSendLogService;
@Autowired
RabbitTemplate rabbitTemplate;
@Autowired
EmployeeService employeeService;
@Scheduled(cron = "0/10 * * * * ?")
public void mailResendTask() {
List
if (logs == null || logs.size() == 0) {
return;
}
logs.forEach(mailSendLog->{
if (mailSendLog.getCount() >= 3) {
mailSendLogService.updateMailSendLogStatus(mailSendLog.getMsgId(), 2);//直接设置该条消息发送失败
}else{
mailSendLogService.updateCount(mailSendLog.getMsgId(), new Date());
Employee emp = employeeService.getEmployeeById(mailSendLog.getEmpId());
/**
* 参数1：交换机名称
* 参数2 ：路由key
* 参数三：数据
* 参数4：作为唯一标识
*
*/
rabbitTemplate.convertAndSend(MailConstants.MAIL_EXCHANGE_NAME, MailConstants.MAIL_ROUTING_KEY_NAME, emp, new CorrelationData(mailSendLog.getMsgId()));
}
});
}
}
MailReceiver（接收端）
@Component
public class MailReceiver {
public static final Logger logger = LoggerFactory.getLogger(MailReceiver.class);
@Autowired
JavaMailSender javaMailSender;
@Autowired
MailProperties mailProperties;
@Autowired
TemplateEngine templateEngine;
@Autowired
StringRedisTemplate redisTemplate;
@RabbitListener(queues = MailConstants.MAIL_QUEUE_NAME)
public void handler(Message message, Channel channel) throws IOException {
Employee employee = (Employee) message.getPayload();
MessageHeaders headers = message.getHeaders();
Long tag = (Long) headers.get(AmqpHeaders.DELIVERY_TAG);
String msgId = (String) headers.get("spring_returned_message_correlation");
if (redisTemplate.opsForHash().entries("mail_log").containsKey(msgId)) {
//redis 中包含该 key，说明该消息已经被消费过
logger.info(msgId + ":消息已经被消费");
channel.basicAck(tag, false);//确认消息已消费
return;
}
//收到消息，发送邮件
MimeMessage msg = javaMailSender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(msg);
try {
helper.setTo(employee.getEmail());
helper.setFrom(mailProperties.getUsername());
helper.setSubject("入职欢迎");
helper.setSentDate(new Date());
Context context = new Context();
context.setVariable("name", employee.getName());
context.setVariable("posName", employee.getPosition().getName());
context.setVariable("joblevelName", employee.getJobLevel().getName());
context.setVariable("departmentName", employee.getDepartment().getName());
//根据模板发送
String mail = templateEngine.process("mail", context);
helper.setText(mail, true);
javaMailSender.send(msg);
redisTemplate.opsForHash().put("mail_log", msgId, "javaboy");
channel.basicAck(tag, false);
logger.info(msgId + ":邮件发送成功");
} catch (MessagingException e) {
//手动应答， tag 消息id ，、
channel.basicNack(tag, false, true);
e.printStackTrace();
logger.error("邮件发送失败：" + e.getMessage());
}
}
}
使用总结
0. rabbtMq的本地服务，得开启。（跟redis差不多）
1. 写 application.properties中的rabbitMq的连接配置等
2. rabbitConfig配置文件。（包括：交换机选择与队列的配置，绑定），选择的模式在这里配置
3. 直接使用，导入rabbitTemplate类，使用rabbitTemplate.convertAndSend()方法
4. 接收类
@RabbitListener(queues = MailConstants.MAIL_QUEUE_NAME) public void handler(Message message, Channel channel) throws IOException {
业务逻辑了
手动接收等等
}
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