当我在方法中抛出异常时,Unity拦截出现了问题。请参考我下面的示例应用程序:
class Program
{
static void Main(string[] args)
{
var container = new UnityContainer();
container.RegisterType<IInterface1, Implementation1>();
container.RegisterType<ICallHandler, AuditLoggingCallHandler>();
container.RegisterInstance(typeof(IUnityContainer), container);
container.AddNewExtension<Interception>();
container.Configure<Interception>()
.SetInterceptorFor<IInterface1>(new InterfaceInterceptor());
var service = container.Resolve<IInterface1>();
service.Method1("xyz");
Console.ReadLine();
}
}
审核日志是实现以下代码的行为:
public class AuditLoggingAttribute : HandlerAttribute
{
public int RequestId { get; set; }
public override ICallHandler CreateHandler(IUnityContainer container)
{
return container.Resolve<ICallHandler>();
}
}
public class AuditLoggingCallHandler : ICallHandler
{
public IMethodReturn Invoke(IMethodInvocation input,
GetNextHandlerDelegate getNext)
{
LogEntry logEntry = new LogEntry();
logEntry.Message = "[BEGIN] " + input.MethodBase.Name + "()";
Logger.Write(logEntry);
IMethodReturn result = getNext()(input, getNext);
if (result.Exception != null)
{
logEntry = new LogEntry();
logEntry.Message = " [EXCEPTION] " + input.MethodBase.Name
+ "." + input.MethodBase.Name
+ "() ";
logEntry.ExtendedProperties
.Add("Exception Message", result.Exception.Message);
logEntry.ExtendedProperties
.Add("Exception StackTrace", result.Exception.StackTrace);
Logger.Write(logEntry);
}
logEntry = new LogEntry();
logEntry.Message = " [FINISH] " + input.MethodBase.Name + "()";
if (result.ReturnValue != null)
{
logEntry
.ExtendedProperties
.Add("Return value", result.ReturnValue.ToString());
}
Logger.Write(logEntry);
return result;
}
public int Order { get; set; }
}
以下是 Interface1.cs 和 Implementation1.cs:
public interface IInterface1
{
[AuditLogging]
IEnumerable<string> Method1(string name);
}
public class Implementation1 : IInterface1
{
public IEnumerable<string> Method1(string name)
{
if (name.Equals("xyz"))
{
throw new Exception("xyz are not allow");
}
yield return "ABC";
}
}
日志文件指出异常没有被记录下来。可能是我错过了什么,或者Unity拦截器没有按预期工作。以下是日志文件,请注意应该有[EXCEPTION]
,但实际上并没有:
----------------------------------------
Timestamp: 5/30/2013 9:29:07 AM
Message: [BEGIN] Method1()
Category: General
Priority: -1
EventId: 0
Severity: Information
Title:
Machine: XXXY
App Domain: ConsoleApplication10.vshost.exe
ProcessId: 8228
Thread Name:
Win32 ThreadId:1280
Extended Properties: Parameter values - [(String) name = 'xyz']
----------------------------------------
顺便说一下,我正在使用企业库版本5和Unity版本2.0。