一个transitional中操作两个不同的数据源的service

问题

问题就是使用了transitional注解之后会让DS注解失效。

解决办法

业务逻辑主入口这里正常使用@Transactional注解。

java 复制代码

package org.springblade.wlw.service.impl;

import com.baomidou.dynamic.datasource.annotation.DS;
import org.springblade.wlw.pojo.entity.waterdata.WaterDevice;
import org.springblade.wlw.pojo.entity.waterdata.WaterDistanceDeviceEx;
import org.springblade.wlw.pojo.vo.WaterDistanceDevice;
import org.springblade.wlw.service.IWaterDeviceService;
import org.springblade.wlw.service.IWaterDistanceDeviceExService;
import org.springblade.wlw.service.IWaterDistanceDeviceService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

@Service
public class WaterDistanceDeviceServiceImpl implements IWaterDistanceDeviceService {
	@Autowired
	private IWaterDeviceService waterDeviceService;
	@Autowired
	private IWaterDistanceDeviceExService waterDistanceDeviceExService;

	@Override
	@Transactional(propagation = Propagation.REQUIRED)
	public void insertFullRecored(WaterDistanceDevice waterDistanceDevice) {
		WaterDevice waterDevice = WaterDevice.fromWaterDistanceDevice(waterDistanceDevice);
		WaterDistanceDeviceEx deviceEx = WaterDistanceDeviceEx.fromWaterDistanceDevice(waterDistanceDevice);
		if (waterDevice == null || deviceEx == null) {
			return;
		}
		waterDeviceService.insertFullRecored(waterDevice);
		waterDistanceDeviceExService.insertFullRecored(deviceEx);
	}
}

两个单独的service也要声明事务，不过要指定为Propagation.REQUIRED_NEW. 每个Service上面要通过@DS注解指定数据源(这是一个正常的操作). 个人的一个建议：DS注解要么全部声明在service类上面，要么全部生命在mapper接口上面，避免到处都是。虽然DS可以声明在方法上面，但是还是避免吧，最好就是一个service控制一张表，是对一个表的增删改查，没有必要声明在方法上面。

java 复制代码

	@Override
	@Transactional(propagation = Propagation.REQUIRES_NEW)
	public void insertFullRecored(WaterDevice device) {
		this.waterDeviceMapper.insertFullRecord(device);
	}

java 复制代码

	@Override
	@Transactional(propagation = Propagation.REQUIRES_NEW)
	public void insertFullRecored(WaterDistanceDeviceEx deviceEx) {
		this.waterDistanceDeviceExMapper.insertFullRecord(deviceEx);
	}

参考

[1] https://blog.csdn.net/qq_16159433/article/details/120951554