private bool TryDispatchEventBatch()
{
using (var session = store.OpenSession())
{
RavenQueryStatistics stats;
var awaitingDispatching = session.Query <ExternalIntegrationDispatchRequest>().Statistics(out stats).Take(settings.ExternalIntegrationsDispatchingBatchSize).ToArray();
if (awaitingDispatching.Length == 0)
{
// If the index hasn't caught up, try again
return(stats.IndexEtag.CompareTo(latestEtag) < 0);
}
var allContexts = awaitingDispatching.Select(r => r.DispatchContext).ToArray();
if (Logger.IsDebugEnabled)
{
Logger.Debug($"Dispatching {allContexts.Length} events.");
}
var eventsToBePublished = eventPublishers.SelectMany(p => p.PublishEventsForOwnContexts(allContexts, session));
foreach (var eventToBePublished in eventsToBePublished)
{
if (Logger.IsDebugEnabled)
{
Logger.Debug("Publishing external event on the bus.");
}
try
{
bus.Publish(eventToBePublished);
}
catch (Exception e)
{
Logger.Error("Failed dispatching external integration event.", e);
var m = new ExternalIntegrationEventFailedToBePublished
{
EventType = eventToBePublished.GetType()
};
try
{
m.Reason = e.GetBaseException().Message;
}
catch (Exception)
{
m.Reason = "Failed to retrieve reason!";
}
bus.Publish(m);
}
}
foreach (var dispatchedEvent in awaitingDispatching)
{
session.Delete(dispatchedEvent);
}
session.SaveChanges();
}
return(true);
}
async Task <bool> TryDispatchEventBatch()
{
using (var session = store.OpenAsyncSession())
{
var awaitingDispatching = await session
.Query <ExternalIntegrationDispatchRequest>()
.Statistics(out var stats)
.Take(settings.ExternalIntegrationsDispatchingBatchSize)
.ToListAsync()
.ConfigureAwait(false);
if (awaitingDispatching.Count == 0)
{
// If the index hasn't caught up, try again
return(stats.IndexEtag.CompareTo(latestEtag) < 0);
}
var allContexts = awaitingDispatching.Select(r => r.DispatchContext).ToArray();
if (Logger.IsDebugEnabled)
{
Logger.Debug($"Dispatching {allContexts.Length} events.");
}
var eventsToBePublished = new List <object>();
foreach (var publisher in eventPublishers)
{
var events = await publisher.PublishEventsForOwnContexts(allContexts, session)
.ConfigureAwait(false);
eventsToBePublished.AddRange(events);
}
foreach (var eventToBePublished in eventsToBePublished)
{
if (Logger.IsDebugEnabled)
{
Logger.Debug("Publishing external event on the bus.");
}
try
{
await bus.Publish(eventToBePublished)
.ConfigureAwait(false);
}
catch (Exception e)
{
Logger.Error("Failed dispatching external integration event.", e);
var m = new ExternalIntegrationEventFailedToBePublished
{
EventType = eventToBePublished.GetType()
};
try
{
m.Reason = e.GetBaseException().Message;
}
catch (Exception)
{
m.Reason = "Failed to retrieve reason!";
}
await domainEvents.Raise(m)
.ConfigureAwait(false);
}
}
foreach (var dispatchedEvent in awaitingDispatching)
{
session.Delete(dispatchedEvent);
}
await session.SaveChangesAsync()
.ConfigureAwait(false);
}
return(true);
}