pipIrr-SV.git - Gitblit

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			package com.dy.common.multiDataSource;

			import com.dy.common.contant.Constant;
			import com.mysql.cj.util.StringUtils;
			import lombok.extern.slf4j.Slf4j;
			import org.aspectj.lang.ProceedingJoinPoint;
			import org.aspectj.lang.annotation.Around;
			import org.aspectj.lang.annotation.Aspect;
			import org.aspectj.lang.annotation.Pointcut;
			import org.aspectj.lang.reflect.MethodSignature;
			import org.springframework.core.annotation.Order;
			import org.springframework.stereotype.Component;

			import java.lang.reflect.Method;
			import java.util.Objects;

			/**
			* 多数据源应用中，通过注解确定某个数据源
			* 例如在Services层方法上注解：
			* @DataSource("test")
			* 表示应用数据源test
			*/
			@Slf4j
			@Aspect
			@Order(Constant.AspectOrderDataSource)
			@Component
			public class DataSourceAspect {

			@Pointcut("@annotation(com.dy.common.multiDataSource.DataSource)")
			public void dataSourcePointCut() {
			}

			@Around("dataSourcePointCut()")
			public Object around(ProceedingJoinPoint point) throws Throwable {
			MethodSignature signature = (MethodSignature) point.getSignature();
			Method method = signature.getMethod();
			DataSource dataSource = method.getAnnotation(DataSource.class);

			if (Objects.nonNull(dataSource) && !StringUtils.isNullOrEmpty(dataSource.value())) {
			//log.info("切换数据源为" + dataSource.value());
			//强制转成方法上配置的数据源，替换掉DataSourceContext中保存的数据源
			DataSourceContext.set(dataSource.value());
			}else{
			String dataSourceName = DataSourceContext.get() ;
			if(!StringUtils.isNullOrEmpty(dataSourceName)){
			log.info("当前数据源为" + dataSourceName);
			}
			}

			try {
			log.info("数据库操作开始" + dataSource.value());
			return point.proceed();
			} finally {
			// 销毁数据源在执行方法之后
			log.info("数据源操作完毕" + dataSource.value());
			DataSourceContext.remove();
			}
			}

			}