@AfterReturning配置

AfterReturning和before，after，around不同是可以获取织入函数的返回值，配置复杂一点。

如果切入点如下：

package com.leanyu.lcsystem.pointcut;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Pointcut;/** * @author pandlvs *描述：切入点定义 */@Aspectpublic class PointcutsDefinition { public static final String ASPECT_SERVICE_EXCUTION = "execution(* com.leanyu.lcsystem.service.*.*(..))";  /**  * 服务层的切入点  */ @Pointcut(ASPECT_SERVICE_EXCUTION) public void inServiceLayer(){}}

则around和AfterReturning的配置区别如下，注意AfterReturning配置必须有argNames参数，且参数值和returning值一样，这样在织入代码里面便可通过returning的值获取被织入函数的返回值。

package com.leanyu.lcsystem.permission.impl;import org.apache.log4j.Logger;import org.aspectj.lang.JoinPoint;import org.aspectj.lang.ProceedingJoinPoint;import org.aspectj.lang.Signature;import org.aspectj.lang.annotation.AfterReturning;import org.aspectj.lang.annotation.Around;import org.aspectj.lang.annotation.Aspect;import org.springframework.beans.factory.annotation.Autowired;import com.leanyu.lcsystem.beans.UserBean;import com.leanyu.lcsystem.permission.ICheckPermission;import com.leanyu.lcsystem.service.log.SyslogService;import com.leanyu.rpc.request.AbstractRequest;import com.leanyu.rpc.response.ObjectResponse;import com.leanyu.rpc.response.RpcResponse;/** * @author pandlvs *  * 使用@Aspect 注解的类， Spring 将会把它当作一个特殊的Bean（一个切面），也就是  * 不对这个类本身进行动态代理  */  @Aspectpublic class PermissionInterceptor   {private Logger logger = Logger.getLogger(PermissionInterceptor.class);@Autowiredprivate ICheckPermission checkPermission;@Autowiredprivate SyslogService syslogService;/** * spring中Around通知   * @param joinPoint * @return * @throws Throwable  */@Around("com.leanyu.lcsystem.pointcut.PointcutsDefinition.inServiceLayer()")   public Object checkPermissionAround( ProceedingJoinPoint joinPoint )      {try{  Object[] args           = joinPoint.getArgs(); AbstractRequest request =  (AbstractRequest)args[0]; int userId          = request.getUserId(); String password     = request.getPassword(); Signature signature = joinPoint.getSignature(); String service      = signature.getDeclaringTypeName(); String method       = signature.getName();   if ( checkPermission.hasServicePermission(userId, service , method , password) ) { Object result = joinPoint.proceed( args );   return result; }  }catch(Throwable e) { logger.error(e.toString(), e); } return null;}/** * AfterReturning 三个参数必须有 * @param joinPoint * @param retVal */@SuppressWarnings("unchecked")@AfterReturning(value = "com.leanyu.lcsystem.pointcut.PointcutsDefinition.inServiceLayer()",argNames = "retVal",returning = "retVal")public void logInfo(JoinPoint joinPoint,Object retVal){Object[] object = joinPoint.getArgs();if(object.length>1) return;int userId;if("logout".equals(joinPoint.getSignature().getName()) || "login".equals(joinPoint.getSignature().getName())){if(((ObjectResponse<UserBean>)retVal).getErrorCode()!=0) return;userId = ((ObjectResponse<UserBean>)retVal).getData().getUserId();}else{if("query".equals(joinPoint.getSignature().getName().substring(0, 5))) return;if(((RpcResponse)retVal).getErrorCode()!=0) return;userId = ((AbstractRequest)object[0]).getUserId();}String action = joinPoint.getSignature().getName();String service = joinPoint.getSignature().getDeclaringTypeName();syslogService.addSyslog(userId, action, service);} }