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queue_redis.go
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/
queue_redis.go
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package taskqueueworker
import (
"context"
"errors"
"github.com/golangid/candi/tracer"
"github.com/gomodule/redigo/redis"
)
// redisQueue queue
type redisQueue struct {
pool *redis.Pool
}
// NewRedisQueue init inmem queue
func NewRedisQueue(redisPool *redis.Pool) QueueStorage {
if redisPool == nil {
panic("Task queue backend require redis")
}
return &redisQueue{pool: redisPool}
}
func (r *redisQueue) PushJob(ctx context.Context, job *Job) (n int64) {
tracer.Log(ctx, "redis.queue:push_job", job.ID)
conn := r.pool.Get()
defer conn.Close()
n, _ = redis.Int64(conn.Do("RPUSH", job.TaskName, job.ID))
return
}
func (r *redisQueue) PopJob(ctx context.Context, taskName string) string {
conn := r.pool.Get()
defer conn.Close()
id, _ := redis.String(conn.Do("LPOP", taskName))
return id
}
func (r *redisQueue) NextJob(ctx context.Context, taskName string) string {
tracer.Log(ctx, "redis.queue:next_job", taskName)
conn := r.pool.Get()
defer conn.Close()
id, err := redis.String(conn.Do("LINDEX", taskName, 0))
if err != nil {
return ""
}
if len(id) == 0 {
return ""
}
return id
}
func (r *redisQueue) Clear(ctx context.Context, taskName string) {
conn := r.pool.Get()
defer conn.Close()
conn.Do("DEL", taskName)
}
func (r *redisQueue) Ping() error {
ping := r.pool.Get()
defer ping.Close()
_, err := ping.Do("PING")
if err != nil {
return errors.New("redis ping: " + err.Error())
}
return nil
}
func (r *redisQueue) Type() string {
return "Redis Queue"
}