go延时队列

package main

import (
"errors"
"flag"
"fmt"
log "github.com/cihub/seelog"
"github.com/garyburd/redigo/redis"
"github.com/robfig/cron"
"runtime"
"strings"
"sync"
"time"
)

var ch chan int = make(chan int)

//声明一些全局变量
var (
pool *redis.Pool
redisServer = flag.String("h", "10.100.68.50:6379", "")
// redisServer = flag.String("h", "pre-mds-sa.bhptzj.0001.sae1.cache.amazonaws.com:6379", "")
redisPassword = flag.String("p", "", "")
redisDbName = flag.String("db", "1", "")
)

/**
* [timerLog description]
* @param {[type]} logFileName string [description]
* @param {[type]} logLevel string [Warning Debug Error Info]
* @param {[type]} logContent string [description]
* @return {[type]} [description]
*/
func timerLog(logLevel string, logContent string) {
config := `
<seelog>
<outputs formatid="testSeeLog">
<filter levels="debug,error,info">
<file path="./error.log" />
</filter>
</outputs>
<formats>
<format id="testSeeLog" format="%Date/%Time [%LEV] %Msg%n"/>
</formats>
</seelog>
`
defer log.Flush()
logger, _ := log.LoggerFromConfigAsBytes([]byte(config))
log.ReplaceLogger(logger)
if logLevel == "error" {
log.Error(logContent)
} else if logLevel == "debug" {
log.Error(logContent)
} else {
log.Info(logContent)
}

}

/**
* 初始化一个pool
*/
func newPool(server, password string) *redis.Pool {
return &redis.Pool{
MaxIdle: 3,
MaxActive: 5,
IdleTimeout: 240 * time.Second,
Dial: func() (redis.Conn, error) {
c, err := redis.Dial("tcp", server)
if err != nil {
fmt.Println("conn error:%s",err.Error())
timerLog("error", server+" conn error :"+err.Error())
return nil, err
}
if password != "" {
if _, err := c.Do("AUTH", password); err != nil {
c.Close()
fmt.Println("pass auth error :%s",err.Error())
timerLog("error", server+" pass auth error :"+err.Error())
return nil, err
}
}
if _, err := c.Do("SELECT", *redisDbName); err != nil {
fmt.Println("db exists error :%s",err.Error())
timerLog("error", server+" db exists error :"+err.Error())
c.Close()
return nil, err
}
return c, err
},
TestOnBorrow: func(c redis.Conn, t time.Time) error {
if time.Since(t) < time.Minute {
return nil
}
_, err := c.Do("PING")
return err
},
}
}

var ErrValueFormatError = errors.New("bucket: value format is error,may be topic,id")
var ErrValueTypeError = errors.New("bucket: value type is error,may be number")
var lock sync.Mutex

func timerProcess(key string) (string, error) {
lock.Lock()
pool = newPool(*redisServer, *redisPassword)
conn := pool.Get()
defer func() {
pool.Close()
conn.Close()
lock.Unlock()
}()
// conn.Do("select",*redisDbName)
t := time.Now().Unix()
rs, errGet := redis.Values(conn.Do("ZREVRANGEBYSCORE", key, t, 0))
if errGet != nil {
timerLog("error", key+":"+errGet.Error())
return key, errGet
}
for _, v := range rs {
value := string(v.([]byte))
topicAndId := strings.Split(value, ",")
var topic string
var queueId string
if len(topicAndId) == 2 {
topic = topicAndId[0]
queueId = topicAndId[1]
_, errSet := conn.Do("rpush", topic, queueId)
if errSet != nil {
timerLog("error", key+"-"+value+":"+errSet.Error())
} else {
_, errDel := conn.Do("zrem", key, value)
if errDel != nil {
timerLog("error", key+"-"+value+":"+errDel.Error())
}
}

} else {
timerLog("error", key+"-"+value+":"+ErrValueFormatError.Error())
}
}
ch <- 1
return "success", nil
}

var dbLock sync.Mutex

func main() {
flag.Parse()
// fmt.Println("begin")
runtime.GOMAXPROCS(runtime.NumCPU())
/**
Seconds | Yes | 0-59 | * / , -
Minutes | Yes | 0-59 | * / , -
Hours | Yes | 0-23 | * / , -
Day of month | Yes | 1-31 | * / , - ?
Month | Yes | 1-12 or JAN-DEC | * / , -
Day of week | Yes | 0-6 or SUN-SAT | * / , - ?
**/
c := cron.New()
spec := "*/1 * * * * *"
c.AddFunc(spec, func() {
dbLock.Lock()
pool = newPool(*redisServer, *redisPassword)
conn := pool.Get()
defer func() {
pool.Close()
conn.Close()
dbLock.Unlock()
}()
// conn.Do("SELECT",*redisDbName)
keys, errGet := redis.Values(conn.Do("keys", "DELAY_BUCKET_*"))
// fmt.Print(keys)
if errGet != nil {
timerLog("error", "get keys error:"+errGet.Error())
panic("get keys error:" + errGet.Error())
c.Stop()
}

for _, k := range keys {
key := string(k.([]byte))
// fmt.Println(key)
go timerProcess(key)
}

for i := 0; i < len(keys); i++ {
fmt.Println(i)
<-ch
}
})
c.Start()
select {}
}