public MethodAopSwitcherAttribute(string methodName)
{
this.useAspect = UseAopType.after;
this.methodName = methodName;
}
public override IMessage Invoke(IMessage msg)
{
UseAopType useAspect = 0;
string uselog = "";
IMethodCallMessage call = (IMethodCallMessage)msg;
//查询目标方法是否使用了启用AOP的MethodAopSwitcherAttribute
foreach (Attribute attr in call.MethodBase.GetCustomAttributes(false))
{
MethodAopSwitcherAttribute mehodAopAttr = attr as MethodAopSwitcherAttribute;
if (mehodAopAttr != null)
{
useAspect = mehodAopAttr.UseAspect;
uselog = mehodAopAttr.Userlog;
break;
//if (mehodAopAttr.UseAspect==1)
//{
// useAspect = 1;
// break;
//}
}
}
if (useAspect == UseAopType.before)
{
this.PreProcess(msg); //执行方法之前的操作
}
//如果触发的是构造函数，此时target的构建还未开始
IConstructionCallMessage ctor = call as IConstructionCallMessage;
if (ctor != null)
{
//获取最底层的默认真实代理
RealProxy default_proxy = RemotingServices.GetRealProxy(this.target);
default_proxy.InitializeServerObject(ctor);
MarshalByRefObject tp = (MarshalByRefObject)this.GetTransparentProxy(); //自定义的透明代理 this
return(EnterpriseServicesHelper.CreateConstructionReturnMessage(ctor, tp));
}
if (useAspect == UseAopType.before)
{
//#region 若不想运行目标方法可以执行该代码，如果直接return null会导致异常发生
//IMethodCallMessage callMsg = msg as IMethodCallMessage;
//return new ReturnMessage(callMsg.InArgs, null, 0, null, callMsg);
//#endregion
#region 调用目标方法代码
IMethodMessage result_msg;
result_msg = RemotingServices.ExecuteMessage(this.target, call);
return(result_msg);
#endregion
}
else
{
#region 调用目标方法代码
IMethodMessage result_msg;
result_msg = RemotingServices.ExecuteMessage(this.target, call);
object result = null;
if (result_msg is ReturnMessage)
{
result = (result_msg as ReturnMessage).ReturnValue;
}
//IMethodReturnMessage result_msg = RemotingServices.ExecuteMessage(this.target, call);
#endregion
if (useAspect == UseAopType.after)
{
this.PostProcess(msg, result_msg, result, uselog); //执行方法结束后的操作
}
return(result_msg);
}
}
public MethodAopSwitcherAttribute(UseAopType useAop, string methodName)
{
this.useAspect = useAop;
this.methodName = methodName;
}