Exemple #1
0
func slaveLoop(conn redis.Conn, delegate Worker, handle string) {
	var redisMsg redisMessage

	logger := logs.NewLogger("redis.slave")
	logger.Info("Started slave")

	for {
		reply, err := redis.Strings(conn.Do("BLPOP", "stop-"+handle, "tasks", 0))

		if len(reply) == 0 {
			panic("Empty task, usually means connection lost, shutting down")
		}

		if reply[0] == "stop-"+handle {
			conn.Do("RPUSH", "stopped-"+handle, true)
			break
		}

		if err == nil {

			redisMsg.WorkloadContext = context.New()

			json.Unmarshal([]byte(reply[1]), &redisMsg)

			go func(experiment string, replyTo string, workloadCtx context.Context) {
				result := delegate.Time(experiment, workloadCtx)
				var encoded []byte
				encoded, err = json.Marshal(result)
				logger.Debug("Completed slave task, replying")
				conn.Do("RPUSH", replyTo, string(encoded))
			}(redisMsg.Workload, redisMsg.Reply, redisMsg.WorkloadContext)
		}

		if err != nil {
			logger.Warnf("ERROR: slave encountered error: %v", err)
		}
	}
}
Exemple #2
0
func push(c redis.Conn, guid string, sample *experiment.Sample) {
	json, _ := json.Marshal(sample)
	c.Do("RPUSH", "experiment."+guid, json)
}