protected virtual EventHandleResult <Subscriber <TKey> > FetchSubscribers(
EventSettings <TKey> settings, SignalEvent <TKey> signalEvent)
{
EventHandleResult <Subscriber <TKey> > subscribers = _subscribersFetcher.Select(settings, signalEvent);
return(subscribers);
}
//methods
public virtual EventHandleResult <SignalDispatch <TKey> > ProcessEvent(
EventSettings <TKey> settings, SignalEvent <TKey> signalEvent)
{
//check is any active templates exist
bool hasActiveTemplates = settings.Templates.Any(x => x.IsActive);
if (hasActiveTemplates == false)
{
return(new EventHandleResult <SignalDispatch <TKey> >()
{
Result = ProcessingResult.Success,
Items = new List <SignalDispatch <TKey> >(),
IsFinished = true
});
}
//select subscribers
EventHandleResult <Subscriber <TKey> > subscribers = FetchSubscribers(settings, signalEvent);
if (subscribers.Result != ProcessingResult.Success)
{
return(EventHandleResult <SignalDispatch <TKey> > .FromResult(subscribers.Result));
}
//build dispatches
EventHandleResult <SignalDispatch <TKey> > dispatches = BuildDispatches(settings, signalEvent, subscribers.Items);
if (dispatches.Result != ProcessingResult.Success)
{
return(dispatches);
}
//schedule send time
ProcessingResult scheduleResult = ScheduleDispatches(settings, signalEvent, subscribers.Items, dispatches.Items);
if (scheduleResult != ProcessingResult.Success)
{
return(EventHandleResult <SignalDispatch <TKey> > .FromResult(scheduleResult));
}
//update subscribers
ProcessingResult updateResult = UpdateSubscribers(settings, signalEvent, subscribers.Items, dispatches.Items);
if (updateResult != ProcessingResult.Success)
{
return(EventHandleResult <SignalDispatch <TKey> > .FromResult(updateResult));
}
//remember latest subscriber handled to resume on next iteration
SetCurrentProgress(signalEvent, subscribers.Items);
return(new EventHandleResult <SignalDispatch <TKey> >()
{
Result = ProcessingResult.Success,
Items = dispatches.Items,
IsFinished = subscribers.IsFinished
});
}
protected virtual EventHandleResult <SignalDispatch <TKey> > BuildDispatches(
EventSettings <TKey> settings, SignalEvent <TKey> signalEvent, List <Subscriber <TKey> > subscribers)
{
EventHandleResult <SignalDispatch <TKey> > dispatches = _dispatchBuilder.Build(
settings, signalEvent, subscribers);
return(dispatches);
}
protected virtual EventHandleResult <Subscriber <TKey> > QuerySubscribers(
EventSettings <TKey> eventSettings, SignalEvent <TKey> signalEvent, SubscribersRangeParameters <TKey> rangeParameters)
{
if (eventSettings.Subscription == null)
{
_logger.LogError(SenderInternalMessages.Common_ParameterMissing, nameof(eventSettings.Subscription));
return(EventHandleResult <Subscriber <TKey> > .FromResult(ProcessingResult.Fail));
}
//use TopicId from SignalEvent over default one in EventSettings
//if both are null will not query for topic
rangeParameters.TopicId = signalEvent.TopicId ?? eventSettings.Subscription.TopicId;
//overwrite Subscription filters data with SignalEvent filters data
rangeParameters.SubscriberFilters = new Dictionary <string, string>();
rangeParameters.SubscriberFilters.Merge(eventSettings.Subscription.SubscriberFiltersData);
rangeParameters.SubscriberFilters.Merge(signalEvent.SubscriberFiltersData);
bool categoryParameterChecked = eventSettings.Subscription.CheckCategoryLastSendDate ||
eventSettings.Subscription.CheckCategoryEnabled ||
eventSettings.Subscription.CheckCategorySendCountNotGreater != null;
rangeParameters.SelectFromCategories = eventSettings.Subscription.CategoryId != null &&
categoryParameterChecked;
bool topicParameterChecked = eventSettings.Subscription.CheckTopicLastSendDate ||
eventSettings.Subscription.CheckTopicEnabled ||
eventSettings.Subscription.CheckTopicSendCountNotGreater != null;
//if delivery type is not specified, will look for topic settings for all delivery types
rangeParameters.SelectFromTopics = eventSettings.Subscription.CategoryId != null &&
rangeParameters.TopicId != null &&
topicParameterChecked;
List <Subscriber <TKey> > subscribers = _subscriberQueries
.Select(eventSettings.Subscription, rangeParameters).Result;
return(new EventHandleResult <Subscriber <TKey> >()
{
Items = subscribers,
IsFinished = subscribers.Count < rangeParameters.Limit,
Result = ProcessingResult.Success
});
}
