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package cache
import (
"fmt"
"log"
"strconv"
"github.com/appwilldev/sharetrace/conf"
redisPool "github.com/mediocregopher/radix.v2/pool"
"github.com/mediocregopher/radix.v2/redis"
)
var (
ValueNilError = fmt.Errorf("redis_nil_value")
Pools = make(map[string]*redisPool.Pool)
)
func init() {
var err error
for name, config := range conf.RedConfig {
Pools[name], err =
redisPool.New(
"tcp",
fmt.Sprintf("%s:%d", config.Host, config.Port),
256)
if err != nil {
log.Fatalf("Failed to init redis pool: " + err.Error())
}
}
}
func getConnFromPool(dbName string) (*redis.Client, error) {
pool := Pools[dbName]
if pool == nil {
log.Println("No cache instance found for %s", dbName)
return nil, fmt.Errorf("No cache instance found for %s", dbName)
}
return pool.Get()
}
func putConnToPool(conn *redis.Client, resp *redis.Resp, dbName string) {
if resp.IsType(redis.IOErr) {
log.Println("get redis connect timeout")
Pools[dbName].Empty()
return
}
Pools[dbName].Put(conn)
}
func Set(dbName string, key string, value string, expireTime int) error {
conn, err := getConnFromPool(dbName)
if err != nil {
return err
}
var res *redis.Resp
if expireTime > 0 {
res = conn.Cmd("set", key, value, "EX", expireTime)
} else {
res = conn.Cmd("set", key, value)
}
defer putConnToPool(conn, res, dbName)
if res.Err != nil {
return res.Err
}
return res.Err
}
func Get(dbName string, key string) (string, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return "", err
}
res := conn.Cmd("get", key)
defer putConnToPool(conn, res, dbName)
if res.Err != nil {
return "", res.Err
}
if res.IsType(redis.Nil) {
return "", ValueNilError
}
return res.Str()
}
func IncrByCount(dbName string, key string, count int64) (int, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return 0, err
}
res := conn.Cmd("incrby", key, count)
defer putConnToPool(conn, res, dbName)
return res.Int()
}
func Expire(dbName string, key string, expireTime int) error {
conn, err := getConnFromPool(dbName)
if err != nil {
return err
}
res := conn.Cmd("expire", key, expireTime)
defer putConnToPool(conn, res, dbName)
return res.Err
}
func Delete(dbName string, key string) error {
conn, err := getConnFromPool(dbName)
if err != nil {
return err
}
res := conn.Cmd("del", key)
defer putConnToPool(conn, res, dbName)
return res.Err
}
func Exists(dbName string, key string) (bool, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return false, err
}
res := conn.Cmd("exists", key)
defer putConnToPool(conn, res, dbName)
if res.Err != nil {
return false, res.Err
}
r, err := res.Int()
if r == 0 || err != nil {
return false, err
}
return true, nil
}
func ListPush(dbName string, key string, value string) error {
conn, err := getConnFromPool(dbName)
if err != nil {
return err
}
res := conn.Cmd("lpush", key, value)
defer putConnToPool(conn, res, dbName)
return res.Err
}
func ListPop(dbName string, key string) error {
conn, err := getConnFromPool(dbName)
if err != nil {
return err
}
res := conn.Cmd("rpop", key)
defer putConnToPool(conn, res, dbName)
return res.Err
}
func ListLen(dbName string, key string) (int, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return 0, err
}
res := conn.Cmd("llen", key)
defer putConnToPool(conn, res, dbName)
return res.Int()
}
func ListRange(dbName string, key string, start int, end int) ([]string, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return nil, err
}
res := conn.Cmd("lrange", key, start, end)
defer putConnToPool(conn, res, dbName)
if res.Err != nil {
return nil, res.Err
}
respList, err := res.Array()
if err != nil {
return nil, err
}
resList := make([]string, len(respList))
for i, resp := range respList {
resList[i], _ = resp.Str()
}
return resList, nil
}
func ListElementDelete(dbName string, key string, value string) (err error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return err
}
res := conn.Cmd("lrem", key, 0, value)
defer putConnToPool(conn, res, dbName)
return res.Err
}
func HashGet(dbName string, hKey string, key string) (string, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return "", err
}
res := conn.Cmd("hget", hKey, key)
defer putConnToPool(conn, res, dbName)
if res.Err != nil {
return "", res.Err
}
if res.IsType(redis.Nil) {
return "", nil
}
return res.Str()
}
func SortedSetAdd(dbName string, key string, val string, score float64) error {
conn, err := getConnFromPool(dbName)
if err != nil {
return err
}
res := conn.Cmd("zadd", key, score, val)
defer putConnToPool(conn, res, dbName)
return res.Err
}
func SortedSetElementDelete(dbName string, key string, val string) error {
conn, err := getConnFromPool(dbName)
if err != nil {
return err
}
res := conn.Cmd("zrem", key, val)
defer putConnToPool(conn, res, dbName)
return res.Err
}
func SortedSetCards(dbName string, key string) (int, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return 0, err
}
res := conn.Cmd("zcard", key)
defer putConnToPool(conn, res, dbName)
return res.Int()
}
func SortedSetCardsBigInt(dbName string, key string) (int64, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return 0, err
}
res := conn.Cmd("zcard", key)
defer putConnToPool(conn, res, dbName)
return res.Int64()
}
func SortedSetElemIndex(dbName string, key string, elem string) (int, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return 0, err
}
res := conn.Cmd("zrevrank", key, elem)
defer putConnToPool(conn, res, dbName)
if res.Err != nil {
return 0, res.Err
}
if res.IsType(redis.Nil) {
return -1, nil
}
return res.Int()
}
func SortedSetScore(dbName string, key string, val string) (float64, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return -1, err
}
res := conn.Cmd("zscore", key, val)
defer putConnToPool(conn, res, dbName)
if res.Err != nil {
return -1, res.Err
}
if res.IsType(redis.Nil) {
return -1, ValueNilError
}
return res.Float64()
}
func SortedSetIncrScore(dbName string, key string, val string, score float64) (float64, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return -1, err
}
res := conn.Cmd("zincrby", key, score, val)
defer putConnToPool(conn, res, dbName)
if res.Err != nil {
return -1, res.Err
}
return res.Float64()
}
func SortedSetExist(dbName string, key string, val string) (bool, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return false, err
}
res := conn.Cmd("zscore", key, val)
defer putConnToPool(conn, res, dbName)
if res.Err != nil {
return false, res.Err
}
if res.IsType(redis.Nil) {
return false, nil
}
return true, nil
}
func SortedSetRevRange(dbName string, key string, start int, end int) ([]string, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return nil, err
}
res := conn.Cmd("zrevrange", key, start, end)
defer putConnToPool(conn, res, dbName)
if res.Err != nil {
return nil, res.Err
}
respList, err := res.Array()
if err != nil {
return nil, err
}
resList := make([]string, len(respList))
for i, resp := range respList {
resList[i], _ = resp.Str()
}
return resList, nil
}
func SortedSetRevRangeByScore(dbName string, cacheKey string, maxScore string, minScore string, count int) ([]string, []float64, error) {
conn, err := getConnFromPool(dbName)
if err != nil {
return nil, nil, err
}
res := conn.Cmd("zrevrangebyscore", cacheKey, maxScore, minScore, "withscores", "limit", 0, count)
defer putConnToPool(conn, res, dbName)
if res.Err != nil {
return nil, nil, fmt.Errorf("redis error: ", res.Err.Error())
}
redList, err := res.List()
if err != nil {
return nil, nil, fmt.Errorf("redis error: ", res.Err.Error())
}
// redis sorted set结构 ["id1", "score1", "id2", "score2"....]
listLen := len(redList)
idList := make([]string, listLen/2)
scoreList := make([]float64, listLen/2)
for ix := 0; ix < listLen; {
idList[ix/2] = redList[ix]
score, _ := strconv.ParseFloat(redList[ix+1], 10)
scoreList[ix/2] = score
ix += 2
}
return idList, scoreList, nil
}