code: protected boolean lockTrigger(TriggerKey triggerKey, T jedis){
          return jedis.set(redisSchema.triggerLockKey(triggerKey), schedulerInstanceId, "NX", "PX", TRIGGER_LOCK_TIMEOUT).equals("OK");
      }
docs: Lock the trigger with the given key to the current jobstore instance
  @param triggerKey the key of the desired trigger
  @param jedis a thread-safe Redis connection
  @return true if lock was acquired successfully; false otherwise