/// <summary>
/// Any exceptions thrown by individual subscribers are
/// caught and passed to the input exceptionHandler delegate.
/// </summary>
public static void PublishWithExceptionStrategy(this MulticastDelegate eventDelegate,
object[] parameters,
IExceptionStrategy exceptionHandler)
{
if (eventDelegate != null)
{
foreach (Delegate subscriber in eventDelegate.GetInvocationList())
{
try
{
//Uses MethodInfo.Invoke method to publish event because
//Delegate.DynamicInvoke method is not available in Compact Framework 3.5.
//DynamicInvoke does essentially the same thing TODO:(? check IL to confirm.)
subscriber.Method.Invoke(subscriber.Target, parameters);
}
catch (Exception e)
{
// Method.Invoke() wraps any exceptions thrown within the method in a
// "TargetInvocationException". We unwrap it here.
if (e.InnerException != null)
{
exceptionHandler.ProcessException(e.InnerException);
}
else
{
exceptionHandler.ProcessException(e);
}
}
}
}
}
/// <summary>
/// Event delegates are invoked asynchronously.
/// Any exceptions thrown by individual subscribers are
/// caught and passed to the input exceptionHandler.
/// </summary>
public static void PublishWithExceptionStrategyAsync(this MulticastDelegate eventDelegate,
object[] parameters,
IExceptionStrategy exceptionHandler)
{
if (eventDelegate != null)
{
foreach (Delegate subscriber in eventDelegate.GetInvocationList())
{
Delegate eventHandler = subscriber;
//Uses MethodInfo.Invoke method to publish event because
//Delegate.DynamicInvoke method is not available in Compact Framework 3.5.
ThreadPool.QueueUserWorkItem(
state =>
{
try
{
eventHandler.Method.Invoke(eventHandler.Target, parameters);
}
catch (Exception exception)
{
// Method.Invoke() wraps any exceptions thrown within the method in a
// "TargetInvocationException". We unwrap it here.
if (exception.InnerException != null)
{
exceptionHandler.ProcessException(exception.InnerException);
}
else
{
exceptionHandler.ProcessException(exception);
}
}
});
}
}
}
