/// <summary>
/// Get attributes decorated on the method handle of the handler
/// </summary>
/// <param name="handlerContext"></param>
/// <returns></returns>
protected virtual IEnumerable<FilterAttribute> GetHandlerAttributes(HandlerContext handlerContext)
{
MethodInfo[] allMethods = handlerContext.HandlerType.GetMethods(BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.Public);
var mInfo = allMethods.FirstOrDefault(x => x.Name == "Handle" &&
x.GetParameters().Length == 1 &&
x.GetParameters()[0].ParameterType == handlerContext.MessageType);
return mInfo != null
? (IEnumerable<FilterAttribute>) ReflectedAttributeCache.GetMethodFilterAttributes(mInfo)
: new FilterAttribute[0];
}
/// <summary>
/// Initialize an instance of ExceptionContext
/// </summary>
/// <param name="handlerContext"></param>
/// <param name="exception"></param>
public ExceptionContext(HandlerContext handlerContext, Exception exception)
{
if (exception == null)
{
throw new ArgumentNullException("exception");
}
Exception = exception;
MetaData = handlerContext.MetaData;
MessageHandled = handlerContext.MessageHandled;
HandlerType = handlerContext.HandlerType;
MessageType = handlerContext.MessageType;
}
/// <summary>
/// Get all filters for the current HandlerContext
/// </summary>
/// <param name="handlerContext"></param>
/// <returns></returns>
public virtual IEnumerable<Filter> GetFilters(HandlerContext handlerContext)
{
if (handlerContext != null)
{
foreach (FilterAttribute attr in GetHandlerAttributes(handlerContext))
{
yield return new Filter(attr, FilterScope.Handler, order: null);
}
foreach (FilterAttribute attr in GetHandlerMethodAttributes(handlerContext))
{
yield return new Filter(attr, FilterScope.Action, order: null);
}
foreach (FilterAttribute attr in GetMessageAttributes(handlerContext))
{
yield return new Filter(attr, FilterScope.Message, order: null);
}
}
}
/// <summary>
/// Get attributes decorated on the message
/// </summary>
/// <param name="handlerContext"></param>
/// <returns></returns>
protected virtual IEnumerable<FilterAttribute> GetMessageAttributes(HandlerContext handlerContext)
{
return ReflectedAttributeCache.GetTypeFilterAttributes(handlerContext.MessageType);
}
/// <summary>
/// Get attributes decorated on the handler class
/// </summary>
/// <param name="handlerContext"></param>
/// <returns></returns>
protected virtual IEnumerable<FilterAttribute> GetHandlerMethodAttributes(HandlerContext handlerContext)
{
return ReflectedAttributeCache.GetTypeFilterAttributes(handlerContext.HandlerType);
}