// Attempt to use SETNX to assert that we have the control thread.
// If this happens, we have to set the expiration time.
func grabControlThread(c redis.Client) bool {
val, err := c.Setnx(CONTROL_THREAD_LOCK, []byte(fmt.Sprint(*hostId)))
if err == nil {
if val {
// New lock acquired, attempt to set expiry properly
log.Info("grabControlThread: Acquired lock")
c.Expire(CONTROL_THREAD_LOCK, CONTROL_THREAD_EXPIRY)
return true
} else {
// Already there
return false
}
} else {
log.Err("grabControlThread: " + err.Error())
return true
}
log.Warning("grabControlThread: Should never get here, defaulting to false")
return false
}
