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| 1 | +package top.cadecode.common.datasource; |
| 2 | + |
| 3 | +import lombok.extern.slf4j.Slf4j; |
| 4 | +import org.aspectj.lang.JoinPoint; |
| 5 | +import org.aspectj.lang.annotation.After; |
| 6 | +import org.aspectj.lang.annotation.Aspect; |
| 7 | +import org.aspectj.lang.annotation.Before; |
| 8 | +import org.springframework.core.annotation.Order; |
| 9 | +import org.springframework.stereotype.Component; |
| 10 | +import top.cadecode.common.datasource.DynamicDataSource.DynamicDataSourceHolder; |
| 11 | + |
| 12 | +/** |
| 13 | + * @author Li Jun |
| 14 | + * @date 2021/12/3 |
| 15 | + * @description 动态数据源切换 AOP 类 |
| 16 | + */ |
| 17 | +@Slf4j |
| 18 | +@Aspect |
| 19 | +@Component |
| 20 | +@Order(-1) // 设置 Order 使切面在 @Transactional 之前执行 |
| 21 | +public class DynamicDataSourceAspect { |
| 22 | + |
| 23 | + /** |
| 24 | + * 切换数据源 |
| 25 | + */ |
| 26 | + @Before("@annotation(dataSource)") |
| 27 | + public void switchDataSource(JoinPoint point, DataSource dataSource) { |
| 28 | + String dataSourceKey = dataSource.value(); |
| 29 | + if (!DynamicDataSourceHolder.containDataSourceKey(dataSourceKey)) { |
| 30 | + log.info("数据源 {} 不存在,将使用默认数据源", dataSource.value()); |
| 31 | + } else { |
| 32 | + // 切换数据源 |
| 33 | + DynamicDataSourceHolder.setDataSourceKey(dataSource.value()); |
| 34 | + log.info("切换数据源到 {},在方法 [{}]", dataSourceKey, point.getSignature()); |
| 35 | + } |
| 36 | + } |
| 37 | + |
| 38 | + /** |
| 39 | + * 重置数据源 |
| 40 | + */ |
| 41 | + @After("@annotation(dataSource)") |
| 42 | + public void resetDataSource(JoinPoint point, DataSource dataSource) { |
| 43 | + // 将数据源重置置为默认数据源 |
| 44 | + DynamicDataSourceHolder.clearDataSourceKey(); |
| 45 | + log.info("重置默认数据源,在方法 [{}]", point.getSignature()); |
| 46 | + } |
| 47 | + |
| 48 | +} |
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