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79 lines
1.5 KiB
Go
79 lines
1.5 KiB
Go
package service
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import (
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"context"
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"encoding/json"
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"net"
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"strings"
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"github.com/go-redis/redis/v8"
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)
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type RedisPersistenceService struct {
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redis *redis.Client
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}
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func NewRedisPersistenceService(config *RedisPersistenceConfig) *RedisPersistenceService {
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client := redis.NewClient(&redis.Options{
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Addr: net.JoinHostPort(config.Host, config.Port),
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// Username: "", // username is only for redis 6.0
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Password: config.Password, // no password set
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DB: config.DB, // use default DB
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})
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return &RedisPersistenceService{
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redis: client,
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}
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}
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func (s *RedisPersistenceService) NewStore(id string, subIDs ...string) Store {
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if len(subIDs) > 0 {
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id += ":" + strings.Join(subIDs, ":")
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}
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return &RedisStore{
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redis: s.redis,
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ID: id,
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}
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}
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type RedisStore struct {
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redis *redis.Client
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ID string
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}
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func (store *RedisStore) Load(val interface{}) error {
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cmd := store.redis.Get(context.Background(), store.ID)
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data, err := cmd.Result()
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if err != nil {
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if err == redis.Nil {
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return ErrPersistenceNotExists
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}
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return err
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}
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if len(data) == 0 {
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return ErrPersistenceNotExists
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}
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return json.Unmarshal([]byte(data), val)
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}
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func (store *RedisStore) Save(val interface{}) error {
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data, err := json.Marshal(val)
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if err != nil {
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return err
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}
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cmd := store.redis.Set(context.Background(), store.ID, data, 0)
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_, err = cmd.Result()
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return err
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}
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func (store *RedisStore) Reset() error {
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_, err := store.redis.Del(context.Background(), store.ID).Result()
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return err
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}
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