/// <summary>
/// Enqueue a job for execution.
/// </summary>
/// <param name="job">The job.</param>
public void Enqueue(Job job)
{
lock (this.queueLock)
{
this.queue.Enqueue(job);
}
this.jobQueuedEvent.Set();
}
/// <summary>
/// Moves the owner queues of a job forward. This means each queue is stepped to the job after this one.
/// </summary>
/// <param name="job">The job.</param>
private void MoveToNextJob(Job job)
{
if (job is MasterJob)
{
this.queuesLock.Enter();
try
{
this.masterQueueJobs.Remove(job);
}
finally
{
this.queuesLock.Exit();
}
}
foreach (JobQueue owner in job.GetOwners())
{
owner.MoveNext();
}
}
/// <summary>
/// Handle a job pending execution.
/// </summary>
/// <param name="sender">The sender of the event.</param>
/// <param name="job">The job.</param>
private void Job_IsPendingChanged(object sender, Job job)
{
if (job.IsPending)
{
if (!job.IsSkipRequested)
{
// Enqueue this job to be executed
this.jobPool.Enqueue(job);
}
else
{
// Skip the job by moving each owner queue forward
this.MoveToNextJob(job);
}
}
}
/// <summary>
/// Handle a job entering the completed state.
/// </summary>
/// <param name="sender">The sender of the event.</param>
/// <param name="job">The job.</param>
private void Job_Completed(object sender, Job job)
{
this.MoveToNextJob(job);
}
/// <summary>
/// Enqueues a job.
/// </summary>
/// <param name="job">The job.</param>
public void Enqueue(Job job)
{
bool jobIsPending;
this.queueLock.Enter();
try
{
if (this.pendingJob != null)
{
this.queue.Enqueue(job);
jobIsPending = false;
}
else
{
this.pendingJob = job;
jobIsPending = true;
}
}
finally
{
this.queueLock.Exit();
}
// Indicate to the job that this queue is pending. If this queue is the last to pend, enqueue for execution
if (jobIsPending)
{
job.IncrementPendingQueues(this.FlaggedForRemoval);
}
}
/// <summary>
/// Moves to the next job in the queue.
/// </summary>
public void MoveNext()
{
Job nextJob;
this.queueLock.Enter();
try
{
if (this.queue.Count > 0)
{
nextJob = this.pendingJob = this.queue.Dequeue();
}
else
{
nextJob = this.pendingJob = null;
}
}
finally
{
this.queueLock.Exit();
}
if (nextJob != null)
{
// Indicate to the job that this queue is pending
nextJob.IncrementPendingQueues(this.FlaggedForRemoval);
}
else
{
// The queue is now idle
if (this.Idle != null)
{
this.Idle(this, this);
}
}
}
