private void DoExecute(JobExecutionRequest jobExecutionRequest)
{
_topLevelJob.Value = jobExecutionRequest;
Log($"Executing {jobExecutionRequest.JobSummary()}");
Interlocked.Increment(ref _outstandingCount);
var task = jobExecutionRequest.ExecuteJob();
WithLock(() => _outstandingTasks.Add(task),
() => Log($"Failed to add job {jobExecutionRequest.JobSummary()} to running list"));
try
{
task.Wait();
}
finally
{
Log($"Finished executing {jobExecutionRequest.JobSummary()}");
WithLock(lockObject =>
{
_outstandingTasks.Remove(task);
Interlocked.Decrement(ref _outstandingCount);
Monitor.Pulse(lockObject);
},
() => Log($"Failed to remove job {jobExecutionRequest.JobSummary()} from running list"));
if (ReferenceEquals(_topLevelJob.Value, jobExecutionRequest))
{
_topLevelJob.Value = null;
}
}
}
public Task <TResult> SubmitJob <TResult>(Job <TResult> job)
{
var jobExecutionRequest = new JobExecutionRequest <TResult>(job, Environment.StackTrace);
var executionPolicy = _policies.FirstOrDefault(x => x.AppliesTo(job)) ?? _defaultPolicy;
var applicableExecutor = executionPolicy.EngineFor(job);
applicableExecutor.ExecuteJob(jobExecutionRequest);
return(jobExecutionRequest.ResultTask);
}
public bool ExecuteJob(JobExecutionRequest jobExecutionRequest)
{
if (!_running)
{
Log($"Not enqueing {jobExecutionRequest.JobSummary()} as executionEngine is stopped");
return(false);
}
ExecuteRequest(jobExecutionRequest);
return(true);
}
private void ExecuteRequest(JobExecutionRequest jobExecutionRequest)
{
Log($"Executing {jobExecutionRequest.JobSummary()}");
try
{
var executionTask = jobExecutionRequest.ExecuteJob();
executionTask.Wait();
}
catch (Exception e)
{
Log($"Job execution {jobExecutionRequest.JobSummary()} failed - {e.Message}");
}
}
private void ExecuteRequest(JobExecutionRequest jobExecutionRequest)
{
if (_topLevelJob.Value != null)
{
Log($"Executing {jobExecutionRequest.JobSummary()} directly as called within context of existing job");
jobExecutionRequest.ExecuteJob().Wait();
}
else
{
Log($"Enqueing {jobExecutionRequest.JobSummary()}");
_jobTaskFactory.StartNew(() => DoExecute(jobExecutionRequest));
}
}
public bool ExecuteJob(JobExecutionRequest jobExecutionRequest)
{
if (_cancellationTokenSource.IsCancellationRequested)
{
Log($"Not enqueing {jobExecutionRequest.JobSummary()} as executionEngine is stopped");
jobExecutionRequest.Cancel();
return(false);
}
WithLock(lockObject =>
{
Log($"Enqueuing job {jobExecutionRequest.JobSummary()}");
_executionQueue.Enqueue(jobExecutionRequest);
Monitor.Pulse(lockObject);
},
() => throw new Exception(
$"Failed to enqueue job {jobExecutionRequest.JobSummary()} as lock could not be obtained in time"));
return(true);
}
private void ExecutionLoop()
{
Log("Starting");
_stopped.Reset();
var cancellationToken = _cancellationTokenSource.Token;
var continueToProcessWork = true;
while (continueToProcessWork)
{
JobExecutionRequest jobExecutionRequest = null;
WithLock(lockObject =>
{
if (_executionQueue.Count > 0)
{
jobExecutionRequest = _executionQueue.Dequeue();
}
else
{
if (!cancellationToken.IsCancellationRequested)
{
Monitor.Wait(lockObject);
}
else
{
continueToProcessWork = false;
}
}
},
() => { });
if (jobExecutionRequest != null)
{
ExecuteRequest(jobExecutionRequest);
}
}
Log("Execution loop ending");
_stopped.Set();
}
public abstract bool ExecuteJob(JobExecutionRequest jobExecutionRequest);
