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redis.go
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redis.go
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package common
import (
"time"
"github.com/RichardKnop/machinery/v1/config"
"github.com/gomodule/redigo/redis"
)
var (
defaultConfig = &config.RedisConfig{
MaxIdle: 3,
IdleTimeout: 240,
ReadTimeout: 15,
WriteTimeout: 15,
ConnectTimeout: 15,
DelayedTasksPollPeriod: 20,
}
)
// RedisConnector ...
type RedisConnector struct{}
// NewPool returns a new pool of Redis connections
func (rc *RedisConnector) NewPool(socketPath, host, password string, db int, cnf *config.RedisConfig) *redis.Pool {
if cnf == nil {
cnf = defaultConfig
}
return &redis.Pool{
MaxIdle: cnf.MaxIdle,
IdleTimeout: time.Duration(cnf.IdleTimeout) * time.Second,
MaxActive: cnf.MaxActive,
Wait: cnf.Wait,
Dial: func() (redis.Conn, error) {
c, err := rc.open(socketPath, host, password, db, cnf)
if err != nil {
return nil, err
}
if db != 0 {
_, err = c.Do("SELECT", db)
if err != nil {
return nil, err
}
}
return c, err
},
// PINGs connections that have been idle more than 10 seconds
TestOnBorrow: func(c redis.Conn, t time.Time) error {
if time.Since(t) < time.Duration(10*time.Second) {
return nil
}
_, err := c.Do("PING")
return err
},
}
}
// Open a new Redis connection
func (rc *RedisConnector) open(socketPath, host, password string, db int, cnf *config.RedisConfig) (redis.Conn, error) {
var opts = []redis.DialOption{
redis.DialDatabase(db),
redis.DialReadTimeout(time.Duration(cnf.ReadTimeout) * time.Second),
redis.DialWriteTimeout(time.Duration(cnf.WriteTimeout) * time.Second),
redis.DialConnectTimeout(time.Duration(cnf.ConnectTimeout) * time.Second),
}
if password != "" {
opts = append(opts, redis.DialPassword(password))
}
if socketPath != "" {
return redis.Dial("unix", socketPath, opts...)
}
return redis.Dial("tcp", host, opts...)
}