void JobManager::DoSchedule(InternalJob::Pointer job,
Poco::Timestamp::TimeDiff delay)
{
Poco::ScopedLock<Poco::Mutex> managerLock(m_mutex);
//job may have been canceled already
int state = job->InternalGetState();
if (state != InternalJob::ABOUT_TO_SCHEDULE && state != Job::SLEEPING)
return;
//if it's a decoration job with no rule, don't run it right now if the system is busy
if (job->GetPriority() == Job::DECORATE && job->GetRule() == 0)
{
Poco::Timestamp::TimeDiff tmp_minDelay = m_running.size() * 100;
delay = std::max(delay, tmp_minDelay);
}
if (delay > 0)
{
job->SetStartTime(Poco::Timestamp() + delay * 100);
InternalJob::Pointer sptr_job(job);
ChangeState(sptr_job, Job::SLEEPING);
}
else
{
job->SetStartTime(Poco::Timestamp() + DelayFor(job->GetPriority()) * 100);
job->SetWaitQueueStamp(m_waitQueueCounter++);
InternalJob::Pointer sptr_job(job);
ChangeState(sptr_job, Job::WAITING);
}
}
bool JobManager::Sleep(InternalJob::Pointer job)
{
{
Poco::ScopedLock<Poco::Mutex> lockMe (m_mutex);
InternalJob::Pointer sptr_job(job);
switch (job->GetState())
{
case Job::RUNNING :
//cannot be paused if it is already running (as opposed to ABOUT_TO_RUN)
if (job->InternalGetState() == Job::RUNNING)
return false;
//job hasn't started running yet (aboutToRun listener)
break;
case Job::SLEEPING :
//update the job wake time
job->SetStartTime(InternalJob::T_INFINITE);
//change state again to re-shuffle the sleep queue
ChangeState(sptr_job, Job::SLEEPING);
return true;
case Job::NONE :
return true;
case Job::WAITING :
//put the job to sleep
break;
}
job->SetStartTime(InternalJob::T_INFINITE);
ChangeState(sptr_job, Job::SLEEPING);
}
m_JobListeners.Sleeping(job.Cast<Job>());
return true;
}
void JobManager::Schedule(InternalJob::Pointer job, Poco::Timestamp::TimeDiff delay, bool reschedule)
{
if (!m_active)
throw Poco::IllegalStateException("Job manager has been shut down.");
poco_assert(job); // "Job is null"
poco_assert(delay >= 0); // "Scheduling delay is negative"
{
Poco::ScopedLock<Poco::Mutex> managerLock (m_mutex);
//if the job is already running, set it to be rescheduled when done
if (job->GetState() == Job::RUNNING)
{
job->SetStartTime(delay);
return;
}
//can't schedule a job that is waiting or sleeping
if (job->InternalGetState() != Job::NONE)
return;
//remember that we are about to schedule the job
//to prevent multiple schedule attempts from succeeding (bug 68452)
InternalJob::Pointer sptr_job(job);
ChangeState(sptr_job, InternalJob::ABOUT_TO_SCHEDULE);
}
//notify listeners outside sync block
m_JobListeners.Scheduled(job.Cast<Job>(), delay, reschedule);
//schedule the job
DoSchedule(job, delay);
//call the pool outside sync block to avoid deadlock
m_Pool->JobQueued();
}
bool JobManager::Cancel(InternalJob::Pointer sptr_job)
{
IProgressMonitor::Pointer sptr_progressMonitor(nullptr);
bool runCanceling = false;
{
Poco::ScopedLock<Poco::Mutex> mangerMutex (m_mutex);
switch (sptr_job->GetState())
{
case Job::NONE :
return true;
case Job::RUNNING :
//cannot cancel a job that has already started (as opposed to ABOUT_TO_RUN)
if (sptr_job->InternalGetState() == Job::RUNNING)
{
sptr_progressMonitor = sptr_job->GetProgressMonitor();
runCanceling = sptr_job->IsRunCanceled();
if(runCanceling)
sptr_job->SetRunCanceled(true);
break ;
}
//signal that the job should be canceled before it gets a chance to run
sptr_job->SetAboutToRunCanceled(true);
return false;
default :
ChangeState(sptr_job, Job::NONE);
}
}
//call monitor outside sync block
if (sptr_progressMonitor != 0)
{
if(runCanceling)
{
if (!sptr_progressMonitor->IsCanceled())
sptr_progressMonitor->SetCanceled(true);
sptr_job->Canceling();
}
return false;
}
//only notify listeners if the job was waiting or sleeping
m_JobListeners.Done(sptr_job.Cast<Job>(), Status::CANCEL_STATUS(BERRY_STATUS_LOC), false);
return true;
}
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();
}