// Signal sends the given signal to the given service.
func (instance *Execution) Signal(target *service.Service, what values.Signal) error {
instance.doRLock()
execution, ok := instance.executions[target]
if !ok {
instance.doRUnlock()
return service.AlreadyStoppedError{Name: target.Name()}
}
instance.doRUnlock()
return execution.Signal(what)
}
// Kill kills the given service.
func (instance *Execution) Kill(target *service.Service) error {
instance.doRLock()
execution, ok := instance.executions[target]
if !ok {
instance.doRUnlock()
return service.AlreadyStoppedError{Name: target.Name()}
}
instance.doRUnlock()
instance.registerStopRequestsFor(execution)
return execution.Kill()
}
func (instance *Execution) createAndRegisterNotExistingExecutionFor(target *service.Service) (*service.Execution, error) {
instance.doWLock()
defer instance.doWUnlock()
result, err := target.NewExecution(instance.executable.KeyStore())
if err != nil {
return nil, err
}
if _, ok := instance.executions[target]; ok {
return nil, service.AlreadyRunningError{Name: target.Name()}
}
instance.executions[target] = result
return result, nil
}
// Restart stops and restarts the given service.
func (instance *Execution) Restart(target *service.Service) error {
instance.doRLock()
if stopRequested, ok := instance.stopRequests[target]; ok && stopRequested {
instance.doRUnlock()
return service.AlreadyStoppedError{Name: target.Name()}
}
execution, ok := instance.executions[target]
if !ok {
instance.doRUnlock()
return instance.Start(target)
}
instance.restartRequests[target] = true
instance.doRUnlock()
execution.Stop()
return nil
}