StatAnnotationAdvisor是一个以druidStatInterceptor为advice和一个以Stat的注解为pointcut的advisor

src/main/java/com/alibaba/druid/support/spring/stat/annotation/StatAnnotationAdvisor.java

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+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.support.spring.stat.annotation;
+
+import org.aopalliance.aop.Advice;
+import org.springframework.aop.Pointcut;
+import org.springframework.aop.support.AbstractPointcutAdvisor;
+import org.springframework.aop.support.ComposablePointcut;
+import org.springframework.aop.support.annotation.AnnotationMatchingPointcut;
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.BeanFactory;
+import org.springframework.beans.factory.BeanFactoryAware;
+
+import com.alibaba.druid.support.spring.stat.DruidStatInterceptor;
+
+@SuppressWarnings("serial")
+public class StatAnnotationAdvisor extends AbstractPointcutAdvisor implements BeanFactoryAware {
+
+	private Advice advice;
+	private Pointcut pointcut;
+	private DruidStatInterceptor druidStatInterceptor;
+	
+	public StatAnnotationAdvisor(DruidStatInterceptor druidStatInterceptor) {
+		this.druidStatInterceptor = druidStatInterceptor;
+		this.advice = buildAdvice();
+		this.pointcut = buildPointcut();
+	}
+
+	public Pointcut getPointcut() {
+		return this.pointcut;
+	}
+
+	public Advice getAdvice() {
+		return this.advice;
+	}
+
+	public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
+		if (this.advice instanceof BeanFactoryAware) {
+			((BeanFactoryAware) this.advice).setBeanFactory(beanFactory);
+		}
+	}
+	
+	protected Advice buildAdvice() {
+		return druidStatInterceptor;
+	}
+
+	protected Pointcut buildPointcut() {
+		Pointcut cpc = new AnnotationMatchingPointcut(Stat.class, true);
+		Pointcut mpc = AnnotationMatchingPointcut.forMethodAnnotation(Stat.class);
+		
+		ComposablePointcut result = new ComposablePointcut(cpc).union(mpc);
+		
+		return result;
+	}
+
+}