void JobManager::EndJob(InternalJob::Pointer ptr_job, IStatus::Pointer result, bool notify)
{
Poco::Timestamp::TimeDiff rescheduleDelay(InternalJob::T_NONE);
{
Poco::ScopedLock<Poco::Mutex> lock ( m_mutex);
// if the job is finishing asynchronously, there is nothing more to do for now
if (result == Job::ASYNC_FINISH)
return;
//if job is not known then it cannot be done
if (ptr_job->GetState() == Job::NONE)
return;
ptr_job->SetResult(result);
ptr_job->SetProgressMonitor(IProgressMonitor::Pointer(nullptr));
ptr_job->SetThread(nullptr);
rescheduleDelay = ptr_job->GetStartTime().epochMicroseconds();
InternalJob::Pointer sptr_job(ptr_job);
ChangeState(sptr_job, Job::NONE);
}
//notify listeners outside sync block
bool reschedule = m_active && rescheduleDelay > InternalJob::T_NONE && ptr_job->ShouldSchedule();
if (notify)
m_JobListeners.Done(ptr_job.Cast<Job>(), result, reschedule);
//reschedule the job if requested and we are still active
if (reschedule)
Schedule(ptr_job, rescheduleDelay, reschedule);
}
bool JobManager::IsBlocking(InternalJob::Pointer sptr_runningJob)
{
{
Poco::ScopedLock<Poco::Mutex> lockMe (m_mutex);
// if this job isn't running, it can't be blocking anyone
if (sptr_runningJob->GetState() != Job::RUNNING)
return false;
// if any job is queued behind this one, it is blocked by it
InternalJob::Pointer ptr_previous = sptr_runningJob->Previous();
while (ptr_previous != 0)
{
// ignore jobs of lower priority (higher priority value means lower priority)
if (ptr_previous->GetPriority() < sptr_runningJob->GetPriority())
{
if (!ptr_previous->IsSystem())
return true;
// TODO Implicit Jobs
// implicit jobs should interrupt unless they act on behalf of system jobs
// if (previous instanceof ThreadJob && ((ThreadJob) previous).shouldInterrupt())
// return true;
}
ptr_previous = ptr_previous->previous;
}
// none found
return false;
}
}
IProgressMonitor::Pointer JobManager::CreateMonitor(InternalJob::Pointer sptr_job, IProgressMonitor::Pointer group, int ticks)
{
{
Poco::ScopedLock<Poco::Mutex> managerLock(m_mutex);
//group must be set before the job is scheduled
//this includes the ABOUT_TO_SCHEDULE state, during which it is still
//valid to set the progress monitor
if (sptr_job->GetState() != Job::NONE)
{
IProgressMonitor::Pointer dummy(nullptr);
return dummy;
}
IProgressMonitor::Pointer sptr_monitor(nullptr);
if (m_sptr_progressProvider != 0)
sptr_monitor = m_sptr_progressProvider->CreateMonitor(sptr_job.Cast<Job>() , group, ticks);
if (sptr_monitor == 0)
{
// return a default NullprogressMonitor
NullProgressMonitor::Pointer sptr_defaultMonitor(new NullProgressMonitor() );
return sptr_defaultMonitor;
}
return sptr_monitor;
}
}
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();
}
void JobManager::WakeUp(InternalJob::Pointer job, Poco::Timestamp::TimeDiff delay)
{
poco_assert(delay >= 0); // "Scheduling delay is negative"
{
Poco::ScopedLock<Poco::Mutex> m_managerLock (m_mutex);
//cannot wake up if it is not sleeping
if (job->GetState() != Job::SLEEPING)
return;
DoSchedule(job, delay);
}
//call the pool outside sync block to avoid deadlock
m_Pool->JobQueued();
/// IListenerExtension only notify of wake up if immediate
if (delay == 0)
m_JobListeners.Awake(job.Cast<Job>());
}
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;
}