SpringBoot+RabbitMQ （保證消息100%投遞成功并被消費）

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一、先扔一張圖

• 簡略介紹163郵箱授權(quán)碼的獲取

• 編寫發(fā)送郵件工具類

• 編寫RabbitMQ配置文件

• 生產(chǎn)者發(fā)起調(diào)用

• 消費者發(fā)送郵件

• 定時任務定時拉取投遞失敗的消息, 重新投遞

• 各種異常情況的測試驗證

org.springframework.boot
spring-boot-starter-amqp



org.springframework.boot
spring-boot-starter-mail

# rabbitmq
spring.rabbitmq.host=localhost
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest
# 開啟confirms回調(diào) P -> Exchange
spring.rabbitmq.publisher-confirms=true
# 開啟returnedMessage回調(diào) Exchange -> Queue
spring.rabbitmq.publisher-returns=true
# 設置手動確認(ack) Queue -> C
spring.rabbitmq.listener.simple.acknowledge-mode=manual
spring.rabbitmq.listener.simple.prefetch=100

# mail
spring.mail.host=smtp.163.com
spring.mail.username=18621142249@163.com
spring.mail.password=123456wangzai
spring.mail.from=18621142249@163.com
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true

CREATE TABLE `msg_log` (
 ?`msg_id` varchar(255) NOT NULL DEFAULT '' COMMENT '消息唯一標識',
 ?`msg` text COMMENT '消息體, json格式化',
 ?`exchange` varchar(255) NOT NULL DEFAULT '' COMMENT '交換機',
 ?`routing_key` varchar(255) NOT NULL DEFAULT '' COMMENT '路由鍵',
 ?`status` int(11) NOT NULL DEFAULT '0' COMMENT '狀態(tài): 0投遞中 1投遞成功 2投遞失敗 3已消費',
 ?`try_count` int(11) NOT NULL DEFAULT '0' COMMENT '重試次數(shù)',
 ?`next_try_time` datetime DEFAULT NULL COMMENT '下一次重試時間',
 ?`create_time` datetime DEFAULT NULL COMMENT '創(chuàng)建時間',
 ?`update_time` datetime DEFAULT NULL COMMENT '更新時間',
 ?PRIMARY KEY (`msg_id`),
 ?UNIQUE KEY `unq_msg_id` (`msg_id`) USING BTREE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='消息投遞日志';

@Component
@Slf4j
public class MailUtil {

 ? ?@Value("${spring.mail.from}")
 ? ?private String from;

 ? ?@Autowired
 ? ?private JavaMailSender mailSender;

 ? ?/**
 ? ? * 發(fā)送簡單郵件
 ? ? *
 ? ? * @param mail
 ? ? */
 ? ?public boolean send(Mail mail) {
 ? ? ? ?String to = mail.getTo();// 目標郵箱
 ? ? ? ?String title = mail.getTitle();// 郵件標題
 ? ? ? ?String content = mail.getContent();// 郵件正文

 ? ? ? ?SimpleMailMessage message = new SimpleMailMessage();
 ? ? ? ?message.setFrom(from);
 ? ? ? ?message.setTo(to);
 ? ? ? ?message.setSubject(title);
 ? ? ? ?message.setText(content);

 ? ? ? ?try {
 ? ? ? ? ? ?mailSender.send(message);
 ? ? ? ? ? ?log.info("郵件發(fā)送成功");
 ? ? ? ? ? ?return true;
 ? ? ? ?} catch (MailException e) {
 ? ? ? ? ? ?log.error("郵件發(fā)送失敗, to: {}, title: {}", to, title, e);
 ? ? ? ? ? ?return false;
 ? ? ? ?}
 ? ?}

}

@Configuration
@Slf4j
public class RabbitConfig {

 ? ?@Autowired
 ? ?private CachingConnectionFactory connectionFactory;

 ? ?@Autowired
 ? ?private MsgLogService msgLogService;

 ? ?@Bean
 ? ?public RabbitTemplate rabbitTemplate() {
 ? ? ? ?RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
 ? ? ? ?rabbitTemplate.setMessageConverter(converter());

 ? ? ? ?// 消息是否成功發(fā)送到Exchange
 ? ? ? ?rabbitTemplate.setConfirmCallback((correlationData, ack, cause) -> {
 ? ? ? ? ? ?if (ack) {
 ? ? ? ? ? ? ? ?log.info("消息成功發(fā)送到Exchange");
 ? ? ? ? ? ? ? ?String msgId = correlationData.getId();
 ? ? ? ? ? ? ? ?msgLogService.updateStatus(msgId, Constant.MsgLogStatus.DELIVER_SUCCESS);
 ? ? ? ? ? ?} else {
 ? ? ? ? ? ? ? ?log.info("消息發(fā)送到Exchange失敗, {}, cause: {}", correlationData, cause);
 ? ? ? ? ? ?}
 ? ? ? ?});

 ? ? ? ?// 觸發(fā)setReturnCallback回調(diào)必須設置mandatory=true, 否則Exchange沒有找到Queue就會丟棄掉消息, 而不會觸發(fā)回調(diào)
 ? ? ? ?rabbitTemplate.setMandatory(true);
 ? ? ? ?// 消息是否從Exchange路由到Queue, 注意: 這是一個失敗回調(diào), 只有消息從Exchange路由到Queue失敗才會回調(diào)這個方法
 ? ? ? ?rabbitTemplate.setReturnCallback((message, replyCode, replyText, exchange, routingKey) -> {
 ? ? ? ? ? ?log.info("消息從Exchange路由到Queue失敗: exchange: {}, route: {}, replyCode: {}, replyText: {}, message: {}", exchange, routingKey, replyCode, replyText, message);
 ? ? ? ?});

 ? ? ? ?return rabbitTemplate;
 ? ?}

 ? ?@Bean
 ? ?public Jackson2JsonMessageConverter converter() {
 ? ? ? ?return new Jackson2JsonMessageConverter();
 ? ?}

 ? ?// 發(fā)送郵件
 ? ?public static final String MAIL_QUEUE_NAME = "mail.queue";
 ? ?public static final String MAIL_EXCHANGE_NAME = "mail.exchange";
 ? ?public static final String MAIL_ROUTING_KEY_NAME = "mail.routing.key";

 ? ?@Bean
 ? ?public Queue mailQueue() {
 ? ? ? ?return new Queue(MAIL_QUEUE_NAME, true);
 ? ?}

 ? ?@Bean
 ? ?public DirectExchange mailExchange() {
 ? ? ? ?return new DirectExchange(MAIL_EXCHANGE_NAME, true, false);
 ? ?}

 ? ?@Bean
 ? ?public Binding mailBinding() {
 ? ? ? ?return BindingBuilder.bind(mailQueue()).to(mailExchange()).with(MAIL_ROUTING_KEY_NAME);
 ? ?}

}

@Service
public class TestServiceImpl implements TestService {

 ? ?@Autowired
 ? ?private MsgLogMapper msgLogMapper;

 ? ?@Autowired
 ? ?private RabbitTemplate rabbitTemplate;

 ? ?@Override
 ? ?public ServerResponse send(Mail mail) {
 ? ? ? ?String msgId = RandomUtil.UUID32();
 ? ? ? ?mail.setMsgId(msgId);

 ? ? ? ?MsgLog msgLog = new MsgLog(msgId, mail, RabbitConfig.MAIL_EXCHANGE_NAME, RabbitConfig.MAIL_ROUTING_KEY_NAME);
 ? ? ? ?msgLogMapper.insert(msgLog);// 消息入庫

 ? ? ? ?CorrelationData correlationData = new CorrelationData(msgId);
 ? ? ? ?rabbitTemplate.convertAndSend(RabbitConfig.MAIL_EXCHANGE_NAME, RabbitConfig.MAIL_ROUTING_KEY_NAME, MessageHelper.objToMsg(mail), correlationData);// 發(fā)送消息

 ? ? ? ?return ServerResponse.success(ResponseCode.MAIL_SEND_SUCCESS.getMsg());
 ? ?}

}

@Component
@Slf4j
public class MailConsumer {

 ? ?@Autowired
 ? ?private MsgLogService msgLogService;

 ? ?@Autowired
 ? ?private MailUtil mailUtil;

 ? ?@RabbitListener(queues = RabbitConfig.MAIL_QUEUE_NAME)
 ? ?public void consume(Message message, Channel channel) throws IOException {
 ? ? ? ?Mail mail = MessageHelper.msgToObj(message, Mail.class);
 ? ? ? ?log.info("收到消息: {}", mail.toString());

 ? ? ? ?String msgId = mail.getMsgId();

 ? ? ? ?MsgLog msgLog = msgLogService.selectByMsgId(msgId);
 ? ? ? ?if (null == msgLog || msgLog.getStatus().equals(Constant.MsgLogStatus.CONSUMED_SUCCESS)) {// 消費冪等性
 ? ? ? ? ? ?log.info("重復消費, msgId: {}", msgId);
 ? ? ? ? ? ?return;
 ? ? ? ?}

 ? ? ? ?MessageProperties properties = message.getMessageProperties();
 ? ? ? ?long tag = properties.getDeliveryTag();

 ? ? ? ?boolean success = mailUtil.send(mail);
 ? ? ? ?if (success) {
 ? ? ? ? ? ?msgLogService.updateStatus(msgId, Constant.MsgLogStatus.CONSUMED_SUCCESS);
 ? ? ? ? ? ?channel.basicAck(tag, false);// 消費確認
 ? ? ? ?} else {
 ? ? ? ? ? ?channel.basicNack(tag, false, true);
 ? ? ? ?}
 ? ?}

}

@Component
@Slf4j
public class ResendMsg {

 ? ?@Autowired
 ? ?private MsgLogService msgLogService;

 ? ?@Autowired
 ? ?private RabbitTemplate rabbitTemplate;

 ? ?// 最大投遞次數(shù)
 ? ?private static final int MAX_TRY_COUNT = 3;

 ? ?/**
 ? ? * 每30s拉取投遞失敗的消息, 重新投遞
 ? ? */
 ? ?@Scheduled(cron = "0/30 * * * * ?")
 ? ?public void resend() {
 ? ? ? ?log.info("開始執(zhí)行定時任務(重新投遞消息)");

 ? ? ? ?ListmsgLogs = msgLogService.selectTimeoutMsg();
 ? ? ? ?msgLogs.forEach(msgLog -> {
 ? ? ? ? ? ?String msgId = msgLog.getMsgId();
 ? ? ? ? ? ?if (msgLog.getTryCount() >= MAX_TRY_COUNT) {
 ? ? ? ? ? ? ? ?msgLogService.updateStatus(msgId, Constant.MsgLogStatus.DELIVER_FAIL);
 ? ? ? ? ? ? ? ?log.info("超過最大重試次數(shù), 消息投遞失敗, msgId: {}", msgId);
 ? ? ? ? ? ?} else {
 ? ? ? ? ? ? ? ?msgLogService.updateTryCount(msgId, msgLog.getNextTryTime());// 投遞次數(shù)+1

 ? ? ? ? ? ? ? ?CorrelationData correlationData = new CorrelationData(msgId);
 ? ? ? ? ? ? ? ?rabbitTemplate.convertAndSend(msgLog.getExchange(), msgLog.getRoutingKey(), MessageHelper.objToMsg(msgLog.getMsg()), correlationData);// 重新投遞

 ? ? ? ? ? ? ? ?log.info("第 " + (msgLog.getTryCount() + 1) + " 次重新投遞消息");
 ? ? ? ? ? ?}
 ? ? ? ?});

 ? ? ? ?log.info("定時任務執(zhí)行結(jié)束(重新投遞消息)");
 ? ?}

}

七、拓展: 使用動態(tài)代理實現(xiàn)消費端冪等性驗證和消費確認(ack)

八、總結(jié)

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