public bool Rebuild(Type projectionType, ProjectionVersion version, DateTime replayUntil)
{
DateTime startRebuildTimestamp = DateTime.UtcNow;
int progressCounter = 0;
log.Info(() => $"Start rebuilding projection `{projectionType.Name}` for version {version}. Deadline is {replayUntil}");
var projection = FastActivator.CreateInstance(projectionType) as IProjectionDefinition;
var projectionEventTypes = GetInvolvedEvents(projectionType).ToList();
projectionStore.InitializeProjectionStore(version);
snapshotStore.InitializeProjectionSnapshotStore(version);
var indexState = index.GetIndexState();
if (indexState.IsPresent() == false)
{
return(false);
}
foreach (var eventType in projectionEventTypes)
{
log.Debug(() => $"Rebuilding projection `{projectionType.Name}` for version {version} using eventType `{eventType}`. Deadline is {replayUntil}");
var indexId = new EventStoreIndexEventTypeId(eventType);
IEnumerable <ProjectionCommit> indexCommits = index.EnumerateCommitsByEventType(indexId);
foreach (var indexCommit in indexCommits)
{
progressCounter++;
if (progressCounter % 1000 == 0)
{
log.Trace(() => $"Rebuilding projection {projectionType.Name} => PROGRESS:{progressCounter} Version:{version} EventType:{eventType} Deadline:{replayUntil} Total minutes working:{(DateTime.UtcNow - startRebuildTimestamp).TotalMinutes}. logId:{Guid.NewGuid().ToString()}");
}
// if the replay did not finish in time (specified by the AR) we need to abort.
if (DateTime.UtcNow >= replayUntil)
{
log.Info(() => $"Rebuilding projection `{projectionType.Name}` stopped bacause the deadline has been reached. PROGRESS:{progressCounter} Version:{version} EventType:`{eventType}` Deadline:{replayUntil}.");
return(false);
}
IAggregateRootId arId = GetAggregateRootId(indexCommit.EventOrigin.AggregateRootId);
IEventStore eventStore = eventStoreFactory.GetEventStore(tenantResolver.Resolve(arId));
EventStream stream = eventStore.Load(arId, theId => projectionType.GetBoundedContext().BoundedContextName);
foreach (AggregateCommit arCommit in stream.Commits)
{
for (int i = 0; i < arCommit.Events.Count; i++)
{
IEvent theEvent = arCommit.Events[i].Unwrap();
if (projectionEventTypes.Contains(theEvent.GetType().GetContractId()))
{
var origin = new EventOrigin(Convert.ToBase64String(arCommit.AggregateRootId), arCommit.Revision, i, arCommit.Timestamp);
projectionRepository.Save(projectionType, theEvent, origin); // overwrite
}
}
}
}
}
log.Info(() => $"Finish rebuilding projection `{projectionType.Name}` for version {version}. Deadline was {replayUntil}");
return(true);
}