public void Run()
{
if (running.IsCancellationRequested)
{
return;
}
Checkpoint projectionСhangeCheckpoint = checkpoints.Load(Checkpoint.PROJECTION_CHANGE);
Checkpoint regularCheckpoint = checkpoints.Load(Checkpoint.REGULAR);
IProjection[] projections = ioc.ResolveAll <IProjection>().ToArray();
// If regular checkpoint is undefined rebuild all projections
if (regularCheckpoint.IsUndefined)
{
MarkAsUnmodified(projections);
}
else
{
// 1. Update changed projection ONLY up to regular checkpoint
var modifiedProjections = versioningRepository.SelectModified(projections);
if (modifiedProjections.Any())
{
ShowProjectionsToRebuild(modifiedProjections);
Rebuild(projectionСhangeCheckpoint, regularCheckpoint, modifiedProjections);
if (running.IsCancellationRequested)
{
return;
}
MarkAsUnmodified(modifiedProjections);
}
}
// 2. Replay commit's tail for all projections
Rebuild(regularCheckpoint, new Checkpoint(Checkpoint.REGULAR), projections);
if (running.IsCancellationRequested)
{
return;
}
// 3. Replay commit's tail again to handle events which was fired during rebuild
Rebuild(regularCheckpoint, new Checkpoint(Checkpoint.REGULAR), projections);
}
