/
processqueue.go
61 lines (49 loc) · 1.37 KB
/
processqueue.go
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package main
import (
"github.com/garyburd/redigo/redis"
"github.com/octoblu/circularqueue"
"github.com/octoblu/claimablejob"
)
// A ProcessQueue processes the circular work queue and dump jobs into the linear work queue
type ProcessQueue interface {
Process() error
}
// A RedisProcessQueue processes the circular work queue and dump jobs into the linear work queue
type RedisProcessQueue struct {
_conn redis.Conn
}
// NewProcessQueue constructs a new Redis Process Queue instance
func NewProcessQueue() *RedisProcessQueue {
return new(RedisProcessQueue)
}
// Process processes the circular work queue and dump jobs into the linear work queue
func (redisProcessQueue *RedisProcessQueue) Process() error {
conn,err := redisProcessQueue.conn()
if err != nil {
return err
}
queue := circularqueue.New(conn)
job,err := queue.Pop()
if err != nil {
return err
}
claimableJob := claimablejob.NewFromJob(job, conn)
if claimed, err := claimableJob.Claim(); err != nil {
return err
} else if !claimed {
return nil
}
claimableJob.PushKeyIntoQueue("linear-job-queue")
return nil
}
func (redisProcessQueue *RedisProcessQueue) conn() (redis.Conn,error) {
if redisProcessQueue._conn != nil {
return redisProcessQueue._conn, nil
}
conn,err := redis.Dial("tcp", ":6379")
if err != nil {
return nil, err
}
redisProcessQueue._conn = conn
return conn, nil
}