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Use pipeline for enqueue

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This commit is contained in:
Ken Hibino 2019-11-25 20:10:35 -08:00
parent faa9b6ee22
commit 199dcf8fdb
1 changed files with 10 additions and 11 deletions
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21
rdb.go
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@ -28,7 +28,7 @@ var (
errDeserializeTask = errors.New("could not decode task message from json")
)
// rdb encapsulates the interaction with redis server.
// rdb encapsulates the interactions with redis server.
type rdb struct {
client *redis.Client
}
@ -45,21 +45,20 @@ func (r *rdb) enqueue(msg *taskMessage) error {
return fmt.Errorf("could not encode task into JSON: %v", err)
}
qname := queuePrefix + msg.Queue
err = r.client.SAdd(allQueues, qname).Err()
pipe := r.client.Pipeline()
pipe.SAdd(allQueues, qname)
pipe.LPush(qname, string(bytes))
_, err = pipe.Exec()
if err != nil {
return fmt.Errorf("command SADD %q %q failed: %v",
allQueues, qname, err)
}
err = r.client.LPush(qname, string(bytes)).Err()
if err != nil {
return fmt.Errorf("command RPUSH %q %q failed: %v",
qname, string(bytes), err)
return fmt.Errorf("could not enqueue task %+v to %q: %v",
msg, qname, err)
}
return nil
}
// dequeue blocks until there is a taskMessage available to be processed,
// once available, it adds the task to "in progress" list and returns the task.
// dequeue blocks until there is a task available to be processed,
// once a task is available, it adds the task to "in progress" list
// and returns the task.
func (r *rdb) dequeue(qname string, timeout time.Duration) (*taskMessage, error) {
data, err := r.client.BRPopLPush(qname, inProgress, timeout).Result()
if err != nil {