Job::Pointer JobManager::StartJob()
{
Job::Pointer job(nullptr);
while (true)
{
job = NextJob();
if (!job)
return Job::Pointer(nullptr);
//must perform this outside sync block because it is third party code
bool shouldRun = job->ShouldRun();
//check for listener veto
if (shouldRun)
m_JobListeners.AboutToRun(job);
//listeners may have canceled or put the job to sleep
bool endJob = false;
{
Poco::ScopedLock<Poco::Mutex> lock(m_mutex);
InternalJob::Pointer internal = job;
if (internal->InternalGetState() == InternalJob::ABOUT_TO_RUN)
{
if (shouldRun && !internal->IsAboutToRunCanceled())
{
internal->SetProgressMonitor(CreateMonitor(job));
//change from ABOUT_TO_RUN to RUNNING
internal->InternalSetState(Job::RUNNING);
break;
}
internal->SetAboutToRunCanceled(false);
endJob = true;
//fall through and end the job below
}
}
if (endJob)
{
//job has been vetoed or canceled, so mark it as done
EndJob(job,Status::CANCEL_STATUS(BERRY_STATUS_LOC), true);
continue;
}
}
m_JobListeners.Running(job);
return job;
}
void JobManager::ChangeState(InternalJob::Pointer sptr_job, int newState)
{
bool blockedJobs = false;
{
Poco::ScopedLock<Poco::Mutex> m_managerLock(m_mutex);
int tmp_oldState = sptr_job->InternalGetState();
switch (tmp_oldState)
{
case Job::NONE:
case InternalJob::ABOUT_TO_SCHEDULE:
break;
case InternalJob::BLOCKED:
//remove this job from the linked list of blocked jobs
sptr_job->Remove();
break;
case Job::WAITING:
m_JobQueueWaiting.Remove(sptr_job);
// assert(false, "Tried to remove a job that wasn't in the queue");
break;
case Job::SLEEPING:
m_JobQueueSleeping.Remove(sptr_job);
// assert(false, "Tried to remove a job that wasn't in the queue");
case Job::RUNNING:
case InternalJob::ABOUT_TO_RUN:
m_running.remove(sptr_job);
//add any blocked jobs back to the wait queue
InternalJob::Pointer sptr_blocked(sptr_job->Previous());
sptr_job->Remove();
blockedJobs = sptr_blocked != 0;
while (sptr_blocked != 0)
{
InternalJob::Pointer previous = sptr_blocked->Previous();
ChangeState(sptr_blocked, Job::WAITING);
sptr_blocked = previous;
}
break;
// default :
// Assert.isLegal(false, "Invalid job state: " + job + ", state: " + oldState);
}
sptr_job->InternalSetState(newState);
switch (newState)
{
case Job::NONE:
sptr_job->SetStartTime(InternalJob::T_NONE);
sptr_job->SetWaitQueueStamp(InternalJob::T_NONE);
case InternalJob::BLOCKED:
break;
case Job::WAITING:
m_JobQueueWaiting.Enqueue(sptr_job);
break;
case Job::SLEEPING:
//try {
m_JobQueueSleeping.Enqueue(sptr_job);
//} catch (RuntimeException e) {
// throw new RuntimeException("Error changing from state: " + oldState);
//}
break;
case Job::RUNNING:
case InternalJob::ABOUT_TO_RUN:
sptr_job->SetStartTime(InternalJob::T_NONE);
sptr_job->SetWaitQueueStamp(InternalJob::T_NONE);
m_running.insert(sptr_job);
break;
case InternalJob::ABOUT_TO_SCHEDULE:
break;
// default :
// Assert.isLegal(false, "Invalid job state: " + job + ", state: " + newState);
}
}
//notify queue outside sync block
if (blockedJobs)
m_Pool->JobQueued();
}