Exemple #1
0
// AddProcWatcher will add a watcher on proc.
func (watcher *Watcher) AddProcWatcher(proc process.ProcContainer) {
	watcher.Lock()
	defer watcher.Unlock()
	if _, ok := watcher.watchProcs[proc.Identifier()]; ok {
		log.Warnf("A watcher for this process already exists.")
		return
	}
	procWatcher := &ProcWatcher{
		procStatus:  make(chan *ProcStatus, 1),
		proc:        proc,
		stopWatcher: make(chan bool, 1),
	}
	watcher.watchProcs[proc.Identifier()] = procWatcher
	go func() {
		log.Infof("Starting watcher on proc %s", proc.Identifier())
		state, err := proc.Watch()
		procWatcher.procStatus <- &ProcStatus{
			state: state,
			err:   err,
		}
	}()
	go func() {
		defer delete(watcher.watchProcs, procWatcher.proc.Identifier())
		select {
		case procStatus := <-procWatcher.procStatus:
			log.Infof("Proc %s is dead, advising master...", procWatcher.proc.Identifier())
			log.Infof("State is %s", procStatus.state.String())
			watcher.restartProc <- procWatcher.proc
			break
		case <-procWatcher.stopWatcher:
			break
		}
	}()
}
Exemple #2
0
func (master *Master) updateStatus(proc process.ProcContainer) {
	if proc.IsAlive() {
		proc.SetStatus("running")
	} else {
		proc.NotifyStopped()
		proc.SetStatus("stopped")
	}
}
Exemple #3
0
// NOT thread safe method. Lock should be acquire before calling it.
func (master *Master) start(proc process.ProcContainer) error {
	if !proc.IsAlive() {
		err := proc.Start()
		if err != nil {
			return err
		}
		master.Watcher.AddProcWatcher(proc)
		proc.SetStatus("running")
	}
	return nil
}
Exemple #4
0
// NOT thread safe method. Lock should be acquire before calling it.
func (master *Master) stop(proc process.ProcContainer) error {
	if proc.IsAlive() {
		waitStop := master.Watcher.StopWatcher(proc.Identifier())
		err := proc.GracefullyStop()
		if err != nil {
			return err
		}
		if waitStop != nil {
			<-waitStop
			proc.NotifyStopped()
			proc.SetStatus("stopped")
		}
		log.Infof("Proc %s successfully stopped.", proc.Identifier())
	}
	return nil
}
Exemple #5
0
func (master *Master) delete(proc process.ProcContainer) error {
	return proc.Delete()
}