private static async Task FailScheduledCommand <TAggregate>(
IEventSourcedRepository <TAggregate> repository,
IScheduledCommand <TAggregate> scheduled,
Exception exception = null,
TAggregate aggregate = null)
where TAggregate : class, IEventSourced
{
var failure = (CommandFailed)createMethod
.MakeGenericMethod(scheduled.Command.GetType())
.Invoke(null, new object[] { scheduled.Command, scheduled, exception });
var previousAttempts = scheduled.IfHas <int>(s => s.Metadata.NumberOfPreviousAttempts)
.ElseDefault();
failure.NumberOfPreviousAttempts = previousAttempts;
if (aggregate != null)
{
// TODO: (FailScheduledCommand) refactor so that getting hold of the handler is simpler
var scheduledCommandOfT = scheduled.Command as Command <TAggregate>;
if (scheduledCommandOfT != null)
{
if (scheduledCommandOfT.Handler != null)
{
await scheduledCommandOfT.Handler
.HandleScheduledCommandException((dynamic)aggregate,
(dynamic)failure);
}
}
if (!(exception is ConcurrencyException))
{
try
{
await repository.Save(aggregate);
}
catch (Exception ex)
{
// TODO: (FailScheduledCommand) surface this more clearly
Trace.Write(ex);
}
}
else if (scheduled.Command is ConstructorCommand <TAggregate> )
{
failure.Cancel();
scheduled.Result = failure;
return;
}
}
if (!failure.IsCanceled &&
failure.RetryAfter == null &&
failure.NumberOfPreviousAttempts < DefaultNumberOfRetriesOnException)
{
failure.Retry(TimeSpan.FromMinutes(Math.Pow(failure.NumberOfPreviousAttempts + 1, 2)));
}
scheduled.Result = failure;
}
private static ScheduledCommandResult FailScheduledCommand <TAggregate>(
IEventSourcedRepository <TAggregate> repository,
IScheduledCommand <TAggregate> scheduled,
Exception exception = null,
TAggregate aggregate = null)
where TAggregate : class, IEventSourced
{
var failure = (CommandFailed)createMethod
.MakeGenericMethod(scheduled.Command.GetType())
.Invoke(null, new object[] { scheduled.Command, scheduled, exception });
var previousAttempts = scheduled.IfHas <int>(s => s.Metadata.NumberOfPreviousAttempts)
.ElseDefault();
failure.NumberOfPreviousAttempts = previousAttempts;
if (aggregate != null)
{
// TODO: (FailScheduledCommand) refactor so that getting hold of the handler is simpler
scheduled.Command
.IfTypeIs <Command <TAggregate> >()
.ThenDo(c =>
{
if (c.Handler != null)
{
Task task = c.Handler
.HandleScheduledCommandException((dynamic)aggregate,
(dynamic)failure);
task.Wait();
}
});
if (!(exception is ConcurrencyException))
{
try
{
repository.Save(aggregate);
}
catch (Exception ex)
{
// TODO: (FailScheduledCommand) surface this more clearly
Trace.Write(ex);
}
}
}
else
{
if (failure.NumberOfPreviousAttempts < 5)
{
failure.Retry(TimeSpan.FromMinutes(failure.NumberOfPreviousAttempts + 1));
}
}
return(failure);
}