package com.dy.common.multiDataSource;
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import com.dy.common.contant.Constant;
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import com.mysql.cj.util.StringUtils;
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import lombok.extern.slf4j.Slf4j;
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import org.aspectj.lang.ProceedingJoinPoint;
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import org.aspectj.lang.annotation.Around;
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import org.aspectj.lang.annotation.Aspect;
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import org.aspectj.lang.annotation.Pointcut;
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import org.aspectj.lang.reflect.MethodSignature;
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import org.springframework.core.annotation.Order;
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import org.springframework.stereotype.Component;
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import java.lang.reflect.Method;
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import java.util.Objects;
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@Slf4j
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@Aspect
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@Order(Constant.AspectOrderDataSource)
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@Component
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public class DataSourceAspect {
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@Pointcut("@annotation(com.dy.common.multiDataSource.DataSource)")
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public void dataSourcePointCut() {
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}
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@Around("dataSourcePointCut()")
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public Object around(ProceedingJoinPoint point) throws Throwable {
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MethodSignature signature = (MethodSignature) point.getSignature();
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Method method = signature.getMethod();
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DataSource dataSource = method.getAnnotation(DataSource.class);
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if (Objects.nonNull(dataSource) && !StringUtils.isNullOrEmpty(dataSource.value())) {
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log.info("切换数据源为" + dataSource.value());
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//强制转成方法上配置的数据源，替换掉DataSourceContext中保存的数据源
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DataSourceContext.set(dataSource.value());
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}else{
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String dataSourceName = DataSourceContext.get() ;
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if(!StringUtils.isNullOrEmpty(dataSourceName)){
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log.info("当前数据源为" + dataSourceName);
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}
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}
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try {
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log.info("数据库操作开始" + dataSource.value());
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return point.proceed();
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} finally {
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// 销毁数据源 在执行方法之后
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log.info("数据源操作完毕" + dataSource.value());
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DataSourceContext.remove();
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}
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}
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}
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