public async Task StartJob()
{
Job currentJob;
if (PendingJobs.NotEmpty() && !Cancelled)
{
lock (PendingJobs)
currentJob = PendingJobs.Dequeue();
lock (ScheduledJobs)
ScheduledJobs.Add(currentJob);
await jobSemaphore.WaitAsync();
if (ScheduledJobs.NotEmpty() && !Cancelled)
{
lock (ScheduledJobs)
ScheduledJobs.Remove(currentJob);
lock (ExecutingJobs)
ExecutingJobs.Add(currentJob);
await currentJob.Execute(ImageMaker);
if (!Cancelled)
{
lock (ExecutingJobs)
ExecutingJobs.Remove(currentJob);
}
jobSemaphore.Release();
}
}
}
/// <summary>
/// Attempts to process executing <see cref="GeolocationBatchUpdateJob"/>s'
/// <see cref="IPGeolocationUpdateRequest"/>s based on the available <see cref="JobItemBatchSize"/>
/// </summary>
private void TryProcessExecutingJobItems()
{
if (!ExecutingJobs.Any())
{
return;
}
foreach (var bufferItem in Buffer)
{
// Retrieve buffered items by item batch size specification
var itemsToProcess = bufferItem.Value.Take(JobItemBatchSize).ToList();
// Retrieve matching job
var job = ExecutingJobs.FirstOrDefault(x => x.Id == bufferItem.Key);
if (job == null)
{
continue;
}
// Invoke delegate to process the series of job items
job.Processor.Invoke(itemsToProcess);
// Remove processed job items from the buffer for the current job
itemsToProcess.ForEach(x => Buffer.FirstOrDefault(i => i.Key == bufferItem.Key)
.Value.Remove(x));
job.RemainingItemCount -= itemsToProcess.Count;
if (!bufferItem.Value.Any())
{
MoveExecutingToCompleted(job);
}
}
}
/// <summary>
/// Moves the provided <see cref="GeolocationBatchUpdateJob"/> from executing to completed
/// </summary>
/// <param name="job">The <see cref="GeolocationBatchUpdateJob"/> to move</param>
private void MoveExecutingToCompleted(GeolocationBatchUpdateJob job)
{
ExecutingJobs.Remove(job);
CompletedJobs.Add(job);
Buffer.Remove(job.Id);
}
/// <summary>
/// Moves the provided <see cref="GeolocationBatchUpdateJob"/> from pending to executing
/// </summary>
/// <param name="job">The <see cref="GeolocationBatchUpdateJob"/> to move</param>
private void MovePendingToExecuting(GeolocationBatchUpdateJob job)
{
PendingJobs.Remove(job);
ExecutingJobs.Add(job);
Buffer.Add(job.Id, job.Request as List <IPGeolocationUpdateRequest>);
}