golang实现redis的延时消息队列功能示例

$ brew install redis
$ go get github.com/garyburd/redigo/redis

$ go get gopkg.in/mgo.v2/bson

func producer() {
 count := 0
 //生成100000个任务
 for count < 100000 {
 count++
 dealTime := int64(rand.Intn(5)) + time.Now().Unix()
 uuid := bson.NewObjectId().Hex()
 redis.Client.AddJob(&job.JobMessage{
 Id: uuid,
 DealTime: dealTime,
 }, + int64(dealTime))
 }
}

// 添加任务
func (client *RedisClient) AddJob(msg *job.JobMessage, dealTime int64) {
 conn := client.Get()
 defer conn.Close()

 key := "JOB_MESSAGE_QUEUE"
 conn.Do("zadd", key, dealTime, util.JsonEncode(msg))
}

// 消费者
func consumer() {
 // 启动10个go routine一起去拿
 count := 0
 for count < 10 {
 go func() {
 for {
 jobs := redis.Client.GetJob()
 if len(jobs) <= 0 {
  time.Sleep(time.Second * 1)
  continue
 }
 currentJob := jobs[0]
 // 如果当前抢redis队列成功，
 if redis.Client.DelJob(currentJob) > 0 {
  var jobMessage job.JobMessage
  util.JsonDecode(currentJob, &jobMessage) //自定义的json解析函数
  handleMessage(&jobMessage)
 }

 }

 }()
 count++
 }
}

// 处理任务用函数
func handleMessage(msg *job.JobMessage) {
 fmt.Printf("deal job: %s, require time: %d \n", msg.Id, msg.DealTime)
 go func() {
 countChan <- true
 }()
}

// 获取任务
func (client *RedisClient) GetJob() []string {
 conn := client.Get()
 defer conn.Close()

 key := "JOB_MESSAGE_QUEUE"
 timeNow := time.Now().Unix()
 ret, err := redis.Strings(conn.Do("zrangebyscore", key, 0, timeNow, "limit", 0, 1))
 if err != nil {
 panic(err)
 }
 return ret
}

// 删除当前任务， 用来判断是否抢到了当前任务
func (client *RedisClient) DelJob(value string) int {
 conn := client.Get()
 defer conn.Close()

 key := "JOB_MESSAGE_QUEUE"
 ret, err := redis.Int(conn.Do("zrem", key, value))
 if err != nil {
 panic(err)
 }
 return ret
}