com.yuweix.kuafu.sharding.aspect.TableAspect Maven / Gradle / Ivy
package com.yuweix.kuafu.sharding.aspect;
import com.yuweix.kuafu.sharding.Shardable;
import com.yuweix.kuafu.sharding.annotation.Shard;
import com.yuweix.kuafu.sharding.context.TableHolder;
import com.yuweix.kuafu.sharding.utils.ShardAopUtil;
import com.yuweix.kuafu.sharding.utils.ShardingUtil;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
/**
* 逻辑表替换为物理表的切面。
* 针对{@link Shardable}子类中的public方法，凡是参数中带有{@link Shard}注解的都会被执行。
* @author yuwei
*/
@Aspect
public class TableAspect {
@Pointcut("execution(public * com.yuweix.kuafu.sharding.Shardable+.*(..))")
public void shard() {
}
@Around("shard()")
public Object onShard(ProceedingJoinPoint point) throws Throwable {
Object target = point.getTarget();
if (!(target instanceof Shardable)) {
return point.proceed();
}
Object shardingVal = ShardAopUtil.getAnnotationArgShardVal(point);
if (shardingVal == null) {
return point.proceed();
}
Shardable shardable = (Shardable) target;
try {
this.beforeSharding(shardable, shardingVal);
return point.proceed();
} finally {
this.afterSharding();
}
}
protected void beforeSharding(Shardable shardable, Object shardingVal) {
if (shardingVal == null) {
return;
}
Class clz = shardable.getPersistClz();
String srcTableName = ShardingUtil.getTableName(clz);
String targetTableName = ShardingUtil.getPhysicalTableName(clz, shardingVal);
TableHolder.set(srcTableName, targetTableName);
}
protected void afterSharding() {
TableHolder.remove();
}
}