private void ConsumeJobs(CancellationToken cancellationToken)
{
while (!cancellationToken.IsCancellationRequested)
{
var job = jobQueue.Take();
while (true)
{
var retryPeriodInMilliseconds = 5000;
try
{
dispatcher.Dispatch(BackgroundJobActions.MarkAsProcessing(job.Id));
// Check if the job is now obsolete (because a newer version of the project device exists)
var jobProjectDeviceVersion = dispatcher.Dispatch(ProjectDeviceActions.GetProjectDeviceVersion(job.ProjectDeviceVersionId));
var projectDeviceVersions = dispatcher.Dispatch(ProjectDeviceActions.GetProjectDeviceVersionsForProjectDevice(jobProjectDeviceVersion.ProjectDeviceId));
if (projectDeviceVersions.Select(pdv => pdv.Version).Max() > jobProjectDeviceVersion.Version)
{
dispatcher.Dispatch(BackgroundJobActions.MarkAsCancelled(job.Id, "A newer version of the project device now exists"));
break;
}
piSyncService.ProcessProjectDeviceVersion(job);
dispatcher.Dispatch(BackgroundJobActions.MarkAsComplete(job.Id));
break;
}
catch (Exception ex)
{
dispatcher.Dispatch(BackgroundJobActions.MarkAsErrored(job.Id, ex.Message, ex.StackTrace));
if (cancellationToken.IsCancellationRequested)
{
break;
}
cancellationToken.WaitHandle.WaitOne(retryPeriodInMilliseconds);
}
}
}
}
