protected override Task OnBeforeEventHandling(EventHandleFlowContext context)
{
if (context.Event.Version != context.NowState.NextVersion)
{
throw new VersionErrorException(context.NowState.Version, context.Event.Version);
}
return(Task.CompletedTask);
}
protected override Task OnAfterEventHandled(EventHandleFlowContext context,
IState newState)
{
_eventHandledNotificationFlow.OnNewEventHandled(new EventNotifierContext
{
Event = context.Event,
CurrentState = newState,
OldState = context.NowState
});
return(Task.CompletedTask);
}
protected override Task OnBeforeEventHandling(EventHandleFlowContext context)
{
context.Event.Version = context.NowState.NextVersion;
return(SaveEvent(context.Event));
async Task SaveEvent(IEvent evt)
{
try
{
_logger.LogTrace("start to save event {@event}", evt);
await _eventSaver.SaveEventAsync(evt);
}
catch (EventSavingException e)
{
_logger.LogError(e,
"failed to save event, please check event store {@event}", evt);
throw;
}
}
}
protected override Task OnAfterEventHandled(EventHandleFlowContext context, IState newState)
{
return(Task.CompletedTask);
}
