wwweww
63 lines
1.4 KiB
Go
63 lines
1.4 KiB
Go
package adapter
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import (
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"bytes"
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"context"
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"encoding/gob"
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"errors"
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"fmt"
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"time"
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"ariga.io/entcache"
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"github.com/redis/go-redis/v9"
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)
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type RedisCache struct {
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redis *redis.ClusterClient
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}
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func NewRedisCache(redis *redis.ClusterClient) *RedisCache {
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return &RedisCache{redis: redis}
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}
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func (c *RedisCache) Del(ctx context.Context, key entcache.Key) error {
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if k, ok := key.(string); !ok {
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return fmt.Errorf("key is not a string")
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} else {
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c.redis.Del(ctx, k)
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return nil
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}
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}
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func (c *RedisCache) Add(ctx context.Context, key entcache.Key, entry *entcache.Entry, duration time.Duration) error {
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k, ok := key.(string)
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if !ok {
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return fmt.Errorf("key is not a string")
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}
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var buf bytes.Buffer
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if err := gob.NewEncoder(&buf).Encode(entry); err != nil {
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return fmt.Errorf("failed to encode entry: %w", err)
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}
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return c.redis.Set(ctx, k, buf.Bytes(), duration).Err()
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}
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func (c *RedisCache) Get(ctx context.Context, key entcache.Key) (*entcache.Entry, error) {
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k, ok := key.(string)
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if !ok {
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return nil, fmt.Errorf("key is not a string")
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}
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val, err := c.redis.Get(ctx, k).Bytes()
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if err != nil {
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if errors.Is(err, redis.Nil) {
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// 缓存未命中
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return nil, nil
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}
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return nil, err
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}
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var entry entcache.Entry
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if err := gob.NewDecoder(bytes.NewReader(val)).Decode(&entry); err != nil {
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return nil, fmt.Errorf("failed to decode entry: %w", err)
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}
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return &entry, nil
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}
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