/// <summary>
/// Executes any scheduled jobs that are due.
/// </summary>
private void ExecuteScheduledJobs()
{
int count = this.MaximumConcurrency - this.ExecutingJobCount;
if (count > 0)
{
DateTime now = DateTime.UtcNow;
long heartbeat = this.lastScheduleCheck == null ? this.Heartbeat : (long)Math.Ceiling(now.Subtract(this.lastScheduleCheck.Value).TotalMilliseconds);
this.lastScheduleCheck = now;
var scheduleNames = this.Schedules.Select(s => s.Name);
var tuples = ScheduledJobTuple.GetExecutableTuples(this.ScheduledJobs, now, heartbeat, count);
using (IJobStoreTransaction trans = this.store.BeginTransaction())
{
try
{
foreach (ScheduledJobTuple tuple in tuples)
{
JobRecord record = ScheduledJob.CreateRecord(tuple.Schedule, tuple.ScheduledJob, now);
bool running = this.runs.GetAll().Any(
r => tuple.Schedule.Name.Equals(r.ScheduleName, StringComparison.OrdinalIgnoreCase) &&
tuple.ScheduledJob.JobType.StartsWith(record.JobType, StringComparison.OrdinalIgnoreCase));
if (!running)
{
IJob job = null;
Exception toJobEx = null;
try
{
job = ScheduledJob.CreateFromConfiguration(tuple.ScheduledJob);
}
catch (ConfigurationErrorsException ex)
{
toJobEx = ex;
this.RaiseEvent(this.Error, new JobErrorEventArgs(record, toJobEx));
}
if (job != null)
{
record.Name = job.Name;
record.JobType = JobRecord.JobTypeString(job);
record.Data = job.Serialize();
this.store.SaveJob(record, trans);
JobRun run = new JobRun(record.Id.Value, job);
run.Finished += new EventHandler<JobRunEventArgs>(this.JobRunFinished);
this.runs.Add(run);
run.Start();
this.RaiseEvent(this.ExecuteScheduledJob, new JobRecordEventArgs(record));
}
else
{
record.Status = JobStatus.FailedToLoadType;
record.FinishDate = now;
record.Exception = new ExceptionXElement(toJobEx).ToString();
}
this.store.SaveJob(record, trans);
}
}
this.runs.Flush();
trans.Commit();
}
catch
{
trans.Rollback();
throw;
}
}
}
}
/// <summary>
/// Dequeues pending jobs in the job store.
/// </summary>
private void DequeueJobs()
{
int count = this.MaximumConcurrency - this.ExecutingJobCount;
if (count > 0)
{
DateTime now = DateTime.UtcNow;
using (IJobStoreTransaction trans = this.store.BeginTransaction())
{
try
{
foreach (var record in this.store.GetJobs(JobStatus.Queued, count, now, trans))
{
record.Status = JobStatus.Started;
record.StartDate = now;
IJob job = null;
Exception toJobEx = null;
try
{
job = record.ToJob();
}
catch (InvalidOperationException ex)
{
toJobEx = ex.InnerException ?? ex;
this.RaiseEvent(this.Error, new JobErrorEventArgs(record, toJobEx));
}
if (job != null)
{
JobRun run = new JobRun(record.Id.Value, job);
run.Finished += new EventHandler<JobRunEventArgs>(this.JobRunFinished);
this.runs.Add(run);
run.Start();
}
else
{
record.Status = JobStatus.FailedToLoadType;
record.FinishDate = now;
record.Exception = new ExceptionXElement(toJobEx).ToString();
}
this.store.SaveJob(record, trans);
this.RaiseEvent(this.DequeueJob, new JobRecordEventArgs(record));
}
this.runs.Flush();
trans.Commit();
}
catch
{
trans.Rollback();
throw;
}
}
}
}