private void DoProcessQueue()
{
// begin read model transaction scope
// get events for workitem.AggregateId
// pass events to read model
// commit
// we might see a work item for an aggregate twice in a row
// especially if we poke the queue when we receive events on
// the event bus
// in fact we can subscibe to events on the event bus and do our own poking
var doMore = true;
while (doMore)
{
var scope = this.scopeFactory();
using (scope)
{
var queue = this.queueFactory(scope);
var workItems = queue.Peek(this.maxItems);
var bus = new UnitOfWorkEventBus(this.context.EventBus);
scope.Add(bus);
foreach (var workItem in workItems)
{
if (this.cancel.IsCancellationRequested)
{
return;
}
var registration = this.registrations.FirstOrDefault(x => AggregateRootBase.GetAggregateTypeDescriptor(x.AggregateType) == workItem.AggregateType);
if (registration != null)
{
try
{
this.ProcessWorkItem(scope, registration, bus, workItem);
queue.Dequeue(workItem);
}
catch (Exception ex)
{
// TODO: handle sqlite busy exceptions
var topic = new DomainTopic(registration.AggregateType, workItem.Identity);
this.context.EventBus.Publish(new DomainNotification(topic, new ReadModelBuilderFaultedEvent(workItem.Identity, ex)));
throw;
}
}
}
scope.Commit();
doMore = workItems.Count == this.maxItems;
}
}
}
private void EnqueueReadModels(IReadModelQueueProducer queue, string aggregateType, IList <IAggregateEvent> events)
{
if (queue != null)
{
var groupedEvents = from evt in events
group evt by evt.AggregateId into g
select new { RootId = g.Key, Version = g.Min(x => x.Version) };
foreach (var g in groupedEvents)
{
var workItem = queue.Enqueue(g.RootId, aggregateType, g.Version);
if (workItem != null)
{
var topic = new DomainTopic(this.registration.AggregateType, g.RootId);
this.eventBus.Publish(new DomainNotification(topic, workItem));
}
}
}
}
private void DoProcessQueue()
{
// begin read model transaction scope
// get events for workitem.AggregateId
// pass events to read model
// commit
// we might see a work item for an aggregate twice in a row
// especially if we poke the queue when we receive events on
// the event bus
// in fact we can subscibe to events on the event bus and do our own poking
var doMore = true;
while (doMore)
{
var scope = this.scopeFactory();
using (scope)
{
var queue = this.queueFactory(scope);
var workItems = queue.Peek(this.maxItems);
var bus = new UnitOfWorkEventBus(this.context.EventBus);
scope.Add(bus);
foreach (var workItem in workItems)
{
if (this.cancel.IsCancellationRequested)
{
return;
}
var registration = this.registrations.FirstOrDefault(x => AggregateRootBase.GetAggregateTypeDescriptor(x.AggregateType) == workItem.AggregateType);
if (registration != null)
{
try
{
this.ProcessWorkItem(scope, registration, bus, workItem);
queue.Dequeue(workItem);
}
catch (Exception ex)
{
// TODO: handle sqlite busy exceptions
var topic = new DomainTopic(registration.AggregateType, workItem.Identity);
this.context.EventBus.Publish(new DomainNotification(topic, new ReadModelBuilderFaultedEvent(workItem.Identity, ex)));
throw;
}
}
}
scope.Commit();
doMore = workItems.Count == this.maxItems;
}
}
}
private void EnqueueReadModels(IReadModelQueueProducer queue, string aggregateType, IList<IAggregateEvent> events)
{
if (queue != null)
{
var groupedEvents = from evt in events
group evt by evt.AggregateId into g
select new { RootId = g.Key, Version = g.Min(x => x.Version)};
foreach (var g in groupedEvents)
{
var workItem = queue.Enqueue(g.RootId, aggregateType, g.Version);
if (workItem != null)
{
var topic = new DomainTopic(this.registration.AggregateType, g.RootId);
this.eventBus.Publish(new DomainNotification(topic, workItem));
}
}
}
}
