go-pkg/asynq
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Use (*rdb).forward in poller

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This commit is contained in:
Ken Hibino 2019-11-26 06:52:58 -08:00
parent cff5e67018
commit d2a6cc127d
2 changed files with 5 additions and 59 deletions
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20
poller.go
View File

@ -3,10 +3,7 @@ package asynq
import (
"fmt"
"log"
"strconv"
"time"
"github.com/go-redis/redis/v7"
)
type poller struct {
@ -56,21 +53,8 @@ func (p *poller) start() {
func (p *poller) exec() {
for _, zset := range p.zsets {
// Get next items in the queue with scores (time to execute) <= now.
now := time.Now().Unix()
msgs, err := p.rdb.zRangeByScore(zset, &redis.ZRangeBy{Min: "-inf", Max: strconv.Itoa(int(now))})
if err != nil {
log.Printf("radis command ZRANGEBYSCORE failed: %v\n", err)
continue
}
fmt.Printf("[DEBUG] got %d tasks from %q\n", len(msgs), zset)
for _, m := range msgs {
// TODO(hibiken): Make this move operation atomic.
if err := p.rdb.move(zset, m); err != nil {
log.Printf("could not move task %+v to queue %q: %v", m, m.Queue, err)
continue
}
if err := p.rdb.forward(zset); err != nil {
log.Printf("[ERROR] could not forward scheduled tasks from %q: %v", zset, err)
}
}
}

44
rdb.go
View File

@ -4,7 +4,6 @@ import (
"encoding/json"
"errors"
"fmt"
"log"
"strconv"
"time"
@ -103,45 +102,6 @@ func (r *rdb) zadd(zset string, zscore float64, msg *taskMessage) error {
return nil
}
func (r *rdb) zRangeByScore(key string, opt *redis.ZRangeBy) ([]*taskMessage, error) {
jobs, err := r.client.ZRangeByScore(key, opt).Result()
if err != nil {
return nil, fmt.Errorf("command ZRANGEBYSCORE %s %v failed: %v", key, opt, err)
}
var msgs []*taskMessage
for _, j := range jobs {
fmt.Printf("[debug] j = %v\n", j)
var msg taskMessage
err = json.Unmarshal([]byte(j), &msg)
if err != nil {
log.Printf("[WARNING] could not unmarshal task data %s: %v\n", j, err)
continue
}
msgs = append(msgs, &msg)
}
return msgs, nil
}
// move moves taskMessage from zfrom to the specified queue.
func (r *rdb) move(from string, msg *taskMessage) error {
// TODO(hibiken): Lua script, make this atomic.
bytes, err := json.Marshal(msg)
if err != nil {
return errSerializeTask
}
if r.client.ZRem(from, string(bytes)).Val() > 0 {
err = r.enqueue(msg)
if err != nil {
log.Printf("[SERVERE ERROR] could not push task to queue %q: %v\n",
msg.Queue, err)
// TODO(hibiken): Handle this error properly.
// Add back to zfrom?
return fmt.Errorf("could not push task %v from %q: %v", msg, msg.Queue, err)
}
}
return nil
}
const maxDeadTask = 100
const deadExpirationInDays = 90
@ -188,6 +148,7 @@ func (r *rdb) moveAll(src, dst string) error {
// forward moves all tasks with a score less than the current unix time
// from the given zset to the default queue.
// TODO(hibiken): Find a better method name that reflects what this does.
func (r *rdb) forward(from string) error {
script := redis.NewScript(`
local msgs = redis.call("ZRANGEBYSCORE", KEYS[1], "-inf", ARGV[1])
@ -199,6 +160,7 @@ func (r *rdb) forward(from string) error {
return msgs
`)
now := float64(time.Now().Unix())
_, err := script.Run(r.client, []string{from, allQueues, defaultQueue}, now).Result()
res, err := script.Run(r.client, []string{from, allQueues, defaultQueue}, now).Result()
fmt.Printf("[DEBUG] got %d tasks from %q\n", len(res.([]interface{})), from)
return err
}