<dependency>
	<groupId>org.apache.rocketmq</groupId>
	<artifactId>rocketmq-spring-boot-starter</artifactId>
</dependency>

# within rocketmq
rocketmq:
  name-server: xxx.xx.x.xx:9876; xxx.xx.x.xx:9876
  producer:
    group: cloud-group

@Override
public void delete(String orderNo) {
	Order order = orderMapper.selectByNo(orderNo);
	//如果訂單存在且狀態(tài)為有效，進行業(yè)務處理
	if (order != null && CloudConstant.VALID_STATUS.equals(order.getStatus())) {
		String transactionId = UUID.randomUUID().toString();
		//如果可以刪除訂單則發(fā)送消息給rocketmq，讓用戶中心消費消息
		rocketMQTemplate.sendMessageInTransaction("add-amount",
				MessageBuilder.withPayload(
						UserAddMoneyDTO.builder()
								.userCode(order.getAccountCode())
								.amount(order.getAmount())
								.build()
				)
				.setHeader(RocketMQHeaders.TRANSACTION_ID, transactionId)
				.setHeader("order_id",order.getId())
				.build()
				,order
		);
	}
}

public TransactionSendResult sendMessageInTransaction(String destination, Message<?> message, Object arg) throws MessagingException {
	try {
		if (((TransactionMQProducer)this.producer).getTransactionListener() == null) {
			throw new IllegalStateException("The rocketMQTemplate does not exist TransactionListener");
		} else {
			org.apache.rocketmq.common.message.Message rocketMsg = this.createRocketMqMessage(destination, message);
			return this.producer.sendMessageInTransaction(rocketMsg, arg);
		}
	} catch (MQClientException var5) {
		throw RocketMQUtil.convert(var5);
	}
}

@Slf4j
@RocketMQTransactionListener
@RequiredArgsConstructor(onConstructor = @__(@Autowired))
public class AddUserAmountListener implements RocketMQLocalTransactionListener {
    private final OrderService orderService;
    private final RocketMqTransactionLogMapper rocketMqTransactionLogMapper;
    /**
     * 執(zhí)行本地事務
     */
    @Override
    public RocketMQLocalTransactionState executeLocalTransaction(Message message, Object arg) {
        log.info("執(zhí)行本地事務");
        MessageHeaders headers = message.getHeaders();
        //獲取事務ID
        String transactionId = (String) headers.get(RocketMQHeaders.TRANSACTION_ID);
        Integer orderId = Integer.valueOf((String)headers.get("order_id"));
        log.info("transactionId is {}, orderId is {}",transactionId,orderId);
 
        try{
            //執(zhí)行本地事務，并記錄日志
            orderService.changeStatuswithRocketMqLog(orderId, CloudConstant.INVALID_STATUS,transactionId);
            //執(zhí)行成功，可以提交事務
            return RocketMQLocalTransactionState.COMMIT;
        }catch (Exception e){
            return RocketMQLocalTransactionState.ROLLBACK;
        }
    }
 
    /**
     * 本地事務的檢查，檢查本地事務是否成功
     */
    @Override
    public RocketMQLocalTransactionState checkLocalTransaction(Message message) {
 
        MessageHeaders headers = message.getHeaders();
        //獲取事務ID
        String transactionId = (String) headers.get(RocketMQHeaders.TRANSACTION_ID);
        log.info("檢查本地事務,事務ID:{}",transactionId);
        //根據(jù)事務id從日志表檢索
        QueryWrapper<RocketmqTransactionLog> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("transaction_id",transactionId);
        RocketmqTransactionLog rocketmqTransactionLog = rocketMqTransactionLogMapper.selectOne(queryWrapper);
        if(null != rocketmqTransactionLog){
            return RocketMQLocalTransactionState.COMMIT;
        }
        return RocketMQLocalTransactionState.ROLLBACK;
    }
}

@Transactional(rollbackFor = RuntimeException.class)
@Override
public void changeStatuswithRocketMqLog(Integer id,String status,String transactionId){
    //將訂單狀態(tài)置位無效
	orderMapper.changeStatus(id,status);
    //插入事務表
	rocketMqTransactionLogMapper.insert(
			RocketmqTransactionLog.builder()
					.transactionId(transactionId)
					.log("執(zhí)行刪除訂單操作")
			.build()
	);
}

@Slf4j
@Service
@RocketMQMessageListener(topic = "add-amount",consumerGroup = "cloud-group")
@RequiredArgsConstructor(onConstructor = @__(@Autowired) )
public class AddUserAmountListener implements RocketMQListener<UserAddMoneyDTO> {
    private final AccountMapper accountMapper;
    /**
     * 收到消息的業(yè)務邏輯
     */
    @Override
    public void onMessage(UserAddMoneyDTO userAddMoneyDTO) {
        log.info("received message: {}",userAddMoneyDTO);
        accountMapper.increaseAmount(userAddMoneyDTO.getUserCode(),userAddMoneyDTO.getAmount());
        log.info("add money success");
    }
}