begin new project

src/main/java/com/peanut/datasource/aspect/DataSourceAspect.java

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+/**
+ * Copyright (c) 2018 人人开源 All rights reserved.
+ *
+ * https://www.renren.io
+ *
+ * 版权所有，侵权必究！
+ */
+
+package com.peanut.datasource.aspect;
+
+
+import com.peanut.datasource.annotation.DataSource;
+import com.peanut.datasource.config.DynamicContextHolder;
+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.Ordered;
+import org.springframework.core.annotation.Order;
+import org.springframework.stereotype.Component;
+
+import java.lang.reflect.Method;
+
+/**
+ * 多数据源，切面处理类
+ *
+ * @author Mark sunlightcs@gmail.com
+ */
+@Aspect
+@Component
+@Order(Ordered.HIGHEST_PRECEDENCE)
+public class DataSourceAspect {
+    protected Logger logger = LoggerFactory.getLogger(getClass());
+
+    @Pointcut("@annotation(com.peanut.datasource.annotation.DataSource) " +
+            "|| @within(com.peanut.datasource.annotation.DataSource)")
+    public void dataSourcePointCut() {
+
+    }
+
+    @Around("dataSourcePointCut()")
+    public Object around(ProceedingJoinPoint point) throws Throwable {
+        MethodSignature signature = (MethodSignature) point.getSignature();
+        Class targetClass = point.getTarget().getClass();
+        Method method = signature.getMethod();
+
+        DataSource targetDataSource = (DataSource)targetClass.getAnnotation(DataSource.class);
+        DataSource methodDataSource = method.getAnnotation(DataSource.class);
+        if(targetDataSource != null || methodDataSource != null){
+            String value;
+            if(methodDataSource != null){
+                value = methodDataSource.value();
+            }else {
+                value = targetDataSource.value();
+            }
+
+            DynamicContextHolder.push(value);
+            logger.debug("set datasource is {}", value);
+        }
+
+        try {
+            return point.proceed();
+        } finally {
+            DynamicContextHolder.poll();
+            logger.debug("clean datasource");
+        }
+    }
+}