package com.ots.framework.aspectj;
import com.ots.common.utils.StringUtils;
import com.ots.framework.aspectj.lang.annotation.DataSource;
import com.ots.framework.datasource.DynamicDataSourceContextHolder;
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.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import java.lang.reflect.Method;

@Aspect
@Order(1)
@Component
public class DataSourceAspect {
    protected Logger logger = LoggerFactory.getLogger(getClass());
    @Pointcut("@annotation(com.ots.framework.aspectj.lang.annotation.DataSource)"
            + "|| @within(com.ots.framework.aspectj.lang.annotation.DataSource)")
    public void dsPointCut() {
    }
    @Around("dsPointCut()")
    public Object around(ProceedingJoinPoint point) throws Throwable {
        DataSource dataSource = getDataSource(point);
        if (StringUtils.isNotNull(dataSource)) {
            DynamicDataSourceContextHolder.setDataSourceType(dataSource.value().name());
        }
        try {
            return point.proceed();
        } finally {
            
            DynamicDataSourceContextHolder.clearDataSourceType();
        }
    }
    
    public DataSource getDataSource(ProceedingJoinPoint point) {
        MethodSignature signature = (MethodSignature) point.getSignature();
        Class<? extends Object> targetClass = point.getTarget().getClass();
        DataSource targetDataSource = targetClass.getAnnotation(DataSource.class);
        if (StringUtils.isNotNull(targetDataSource)) {
            return targetDataSource;
        } else {
            Method method = signature.getMethod();
            DataSource dataSource = method.getAnnotation(DataSource.class);
            return dataSource;
        }
    }
}