/// <summary>
/// 實現Invoke方法
/// </summary>
/// <param name="msg"></param>
/// <returns></returns>
public override IMessage Invoke(IMessage msg)
{
IMethodReturnMessage methodReturnMessage = null;
IMethodCallMessage methodCallMessage = msg as IMethodCallMessage;
if (methodCallMessage != null)
{
IConstructionCallMessage constructionCallMessage = methodCallMessage as IConstructionCallMessage;
if (constructionCallMessage != null)
{
RealProxy defaultProxy = RemotingServices.GetRealProxy(_target);
defaultProxy.InitializeServerObject(constructionCallMessage);
methodReturnMessage = EnterpriseServicesHelper.CreateConstructionReturnMessage(constructionCallMessage, (MarshalByRefObject)GetTransparentProxy());
}
else
{
_interception.PreInvoke(methodCallMessage);
try
{
methodReturnMessage = RemotingServices.ExecuteMessage(_target, methodCallMessage);
}
catch { }
if (methodReturnMessage.Exception != null)
{
_interception.ExceptionHandle(methodReturnMessage);
}
else
{
_interception.PostInvoke(methodReturnMessage);
}
}
}
return(methodReturnMessage);
}
/// <summary>
/// 执行具体的拦截操作
/// </summary>
/// <param name="methodInfo"></param>
/// <param name="methodCallMessage"></param>
/// <returns></returns>
private IMethodReturnMessage Proceed(MethodInfo methodInfo, IMethodCallMessage methodCallMessage)
{
if (_enablePreInterception)
{
_interception.PreInvoke(methodInfo, methodCallMessage.Args,
_target);
}
// 问题1：使用 methodReturnMessage = RemotingServices.ExecuteMessage(_target, methodCallMessage) 方法 不能捕获异常
Exception methodException = null;
var methodReturnMessage = SafeExecute(methodCallMessage, ref methodException);
if (methodException != null)
{
_interception.ExceptionHandle(methodInfo, methodCallMessage.Args,
_target, methodException);
}
if (_enableAfterInterception)
{
_interception.AfterInvoke(methodInfo, methodCallMessage.Args,
_target);
}
return(methodReturnMessage);
}