internal Status UpdateIndex()
{
UpdateJob proposedJob = Storage.CreateUpdateJob(ViewsInGroup().Select(x => x.Storage));
UpdateJob nextJob = null;
var updateQueue = _UpdateQueueFactory.ListForGroup(GroupName());
updateQueue.Lock();
try {
if (updateQueue.Count > 0)
{
nextJob = updateQueue.FirstOrDefault(x => x.Equals(proposedJob));
if (nextJob == null)
{
QueueUpdate(proposedJob);
nextJob = proposedJob;
}
}
else
{
QueueUpdate(proposedJob);
nextJob = proposedJob;
nextJob.Run();
}
} finally {
updateQueue.Unlock();
}
nextJob.Wait();
return(nextJob.Result);
}
private UpdateJob QueueUpdate(UpdateJob job)
{
job.Finished += (sender, e) => {
UpdateJob nextJob;
_updateQueue.TryDequeue(out nextJob);
if (_updateQueue.TryPeek(out nextJob))
{
nextJob.Run();
}
};
_updateQueue.Enqueue(job);
if (_updateQueue.Count == 1)
{
job.Run();
}
return(job);
}