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engine_redis.go
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/
engine_redis.go
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package dbcommon
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"time"
"github.com/go-redis/redis"
)
/*************************
* author: Dev0026
* createTime: 19-4-2
* updateTime: 19-4-2
* description:
*************************/
func NewRedisEngine(cfg RedisConfig) (*redis.ClusterClient, error) {
if len(cfg.Addrs) == 0 && cfg.Platform != "" {
HandleRedisConfigEncryFields(&cfg)
}
var opt = &redis.ClusterOptions{
// A seed list of host:port addresses of cluster nodes.
Addrs: cfg.Addrs,
// The maximum number of retries before giving up. Command is retried
// on network errors and MOVED/ASK redirects.
// Default is 16.
MaxRedirects: cfg.MaxRedirects,
// Enables read-only commands on slave nodes.
ReadOnly: cfg.ReadOnly,
// Allows routing read-only commands to the closest master or slave node.
RouteByLatency: cfg.RouteByLatency,
RouteRandomly: cfg.RouteRandomly,
// Following options are copied from Options struct.
MaxRetries: cfg.MaxRetries,
Password: cfg.Password,
IdleTimeout: time.Duration(cfg.IdleTimeout) * time.Minute,
// PoolSize applies per cluster node and not for the whole cluster.
PoolSize: cfg.PoolSize,
IdleCheckFrequency: cfg.IdleCheckFrequency,
}
cluster := redis.NewClusterClient(opt)
str, err := cluster.Ping().Result()
if nil != err {
er := fmt.Errorf("NewRedisEngine [ cfg %+v ] redis.NewClusterClient err %v ", cfg, err)
return nil, er
}
fmt.Printf(" %+v redis cluster engine start success, ping %v \n", cfg.Addrs, str)
redisEngines = append(redisEngines, cluster)
return cluster, nil
}
func NewRedisScriptCli(cli *redis.ClusterClient) *RedisScriptCli {
return &RedisScriptCli{
Cli: cli,
}
}
func (cc *RedisScriptCli) LoadScripts(dir string) error {
cc.scriptDir = dir
fInfo, err := os.Stat(dir)
if nil != err {
er := fmt.Errorf("*RedisScriptCli.LoadScript [ dir %v ] Stat err: %v", dir, err)
return er
} else if fInfo.IsDir() {
err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
if info.IsDir() && path == dir {
return nil
} else if info.IsDir() && path != dir {
return cc.LoadScripts(path)
} else {
shaStr, err := cc.LoadScriptFile(path)
if nil != err {
return err
} else {
cc.sha1Map.Store(info.Name(), shaStr)
return nil
}
}
})
return err
} else {
shaStr, err := cc.LoadScriptFile(dir)
if nil != err {
return err
} else {
cc.sha1Map.Store(dir, shaStr)
return nil
}
}
}
func (cc *RedisScriptCli) LoadScriptFile(fileName string) (string, error) {
bin, err := ioutil.ReadFile(fileName)
if nil != err {
er := fmt.Errorf("*RedisScriptCli.LoadScriptFile [ fileName %v ] ioutil.ReadFile err: %v", fileName, err)
return "", er
}
scriptStr := string(bin)
str, err := cc.Cli.ScriptLoad(scriptStr).Result()
if nil != err {
er := fmt.Errorf("*RedisScriptCli.LoadScript [ scriptStr %v ] ScriptLoad err: %v", scriptStr, err)
return "", er
} else {
return str, nil
}
}
func (cc *RedisScriptCli) EvalSha(luaFileName string, keys []string, args ...interface{}) (interface{}, error) {
if val, ok := cc.sha1Map.Load(luaFileName); ok {
sha1 := val.(string)
//fmt.Println(sha1)
rst, err := cc.Cli.EvalSha(sha1, keys, args...).Result()
if nil != err && err.Error() == "NOSCRIPT No matching script. Please use EVAL." {
return cc.Eval(cc.scriptDir, luaFileName, keys, args...)
} else {
if err != err {
er := fmt.Errorf("EvalSha [ luaFileName %v keys [ %+v ] args [ %+v ] rst %v ] err: %v ", luaFileName, keys, args, rst, err)
return rst, er
}
return rst, nil
}
} else {
return cc.Eval(cc.scriptDir, luaFileName, keys, args...)
}
}
func (cc *RedisScriptCli) Eval(dir, luaFileName string, keys []string, args ...interface{}) (interface{}, error) {
var rst interface{}
var fileExist bool
err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
if info.IsDir() && path == cc.scriptDir {
return nil
} else if info.IsDir() {
rst, err = cc.Eval(path, luaFileName, keys, args...)
return err
} else if luaFileName == info.Name() {
fileExist = true
bin, err := ioutil.ReadFile(path)
if nil != err {
er := fmt.Errorf("*RedisScriptCli.LoadScriptFile [ fileName %v ] ioutil.ReadFile err: %v", path, err)
return er
}
scriptStr := string(bin)
rst, err = cc.Cli.Eval(scriptStr, keys, args...).Result()
return err
} else {
return nil
}
})
if !fileExist {
return rst, fmt.Errorf("*RedisScriptCli.Eval [ luaFileName %v ] file not found", luaFileName)
}
if err != err {
er := fmt.Errorf("Eval [ luaFileName %v keys [ %+v ] args [ %+v ] rst %v ] err: %v ", luaFileName, keys, args, rst, err)
return rst, er
}
return rst, err
}