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db.go
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db.go
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package main
import (
"context"
"strconv"
"github.com/redis/go-redis/v9"
"github.com/rs/zerolog/log"
)
var redisAddr = GetENV("REDIS_URL", "localhost:6379")
var rdb *redis.Client
var ctx = context.Background()
func ConnectRedis() {
log.Info().Msg("Initializing Redis connection")
// rdb = redis.NewClient(&redis.Options{
// Addr: redis_addr,
// Password: "",
// DB: 0,
// })
opt, err := redis.ParseURL(redisAddr)
if err != nil {
panic(err)
}
rdb = redis.NewClient(opt)
// TODO: use TLS and CRT/KEY; or SSH
// TODO: redis logger
// logger := &internal.Logging{
// Printf: loggingRedis,
// }
// redis.SetLogger(logger)
// TODO: config Context ctx
// TODO: health check
log.Info().Msg("Pinging Redis")
_, err = rdb.Ping(ctx).Result()
if err != nil {
log.Fatal().Err(err)
}
}
func QueryHash(hash string) string {
val, err := rdb.Incr(ctx, hash).Result()
if err != nil {
log.Debug().Err(err)
return "error"
}
return strconv.FormatInt(val, 10)
}
func IncrHashBy(hash string, cnt int64) int64 {
if cnt < 0 {
return -1
}
val, err := rdb.IncrBy(ctx, hash, cnt).Result()
if err != nil {
log.Debug().Err(err)
return -1
}
return val
}
func GetHash(hash string) string {
val, err := rdb.Get(ctx, hash).Result()
if err == redis.Nil { // key does not exist: initialize key
return "0"
} else if err != nil {
logError(err)
return "error"
}
return val
}