82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
/*
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* Copyright 2025 coze-dev Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package jsoncache
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import (
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"context"
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"encoding/json"
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"fmt"
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"github.com/redis/go-redis/v9"
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)
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type JsonCache[T any] struct {
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cache *redis.Client
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prefix string
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}
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func New[T any](prefix string, cache *redis.Client) *JsonCache[T] {
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return &JsonCache[T]{
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prefix: prefix,
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cache: cache,
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}
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}
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func (g *JsonCache[T]) Save(ctx context.Context, k string, v *T) error {
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if v == nil {
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return fmt.Errorf("cannot save nil value for key: %s", k)
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}
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data, err := json.Marshal(v)
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if err != nil {
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return fmt.Errorf("marshal failed for type %T: %w", *v, err)
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}
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key := g.prefix + k
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if err := g.cache.Set(ctx, key, data, 0).Err(); err != nil {
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return fmt.Errorf("redis set failed for key %s: %w", k, err)
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}
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return nil
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}
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// Get returns default T if key not found
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func (g *JsonCache[T]) Get(ctx context.Context, k string) (*T, error) {
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key := g.prefix + k
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var obj T
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data, err := g.cache.Get(ctx, key).Result()
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if err == redis.Nil {
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return &obj, nil
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}
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if err != nil {
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return nil, fmt.Errorf("failed to get key %s: %w", k, err)
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}
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if err := json.Unmarshal([]byte(data), &obj); err != nil {
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return nil, fmt.Errorf("failed to unmarshal json for key %s: %w", k, err)
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}
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return &obj, nil
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}
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func (g *JsonCache[T]) Delete(ctx context.Context, k string) error {
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if err := g.cache.Del(ctx, k).Err(); err != nil {
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return fmt.Errorf("failed to delete key %s: %w", k, err)
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}
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return nil
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}
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