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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| package service | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "time" | ||
|
|
||
| "github.com/go-redis/redis/v8" | ||
| "github.com/mstgnz/cdn/pkg/observability" | ||
| "github.com/rs/zerolog" | ||
| ) | ||
|
|
||
| type CacheService interface { | ||
| Get(key string) ([]byte, error) | ||
| Set(key string, value []byte, expiration time.Duration) error | ||
| Delete(key string) error | ||
| GetResizedImage(bucket, path string, width, height uint) ([]byte, error) | ||
| SetResizedImage(bucket, path string, width, height uint, data []byte) error | ||
| } | ||
|
|
||
| type redisCache struct { | ||
| client *redis.Client | ||
| logger zerolog.Logger | ||
| } | ||
|
|
||
| func NewCacheService(redisURL string) (CacheService, error) { | ||
| opt, err := redis.ParseURL(redisURL) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| client := redis.NewClient(opt) | ||
| if err := client.Ping(context.Background()).Err(); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return &redisCache{ | ||
| client: client, | ||
| logger: observability.Logger(), | ||
| }, nil | ||
| } | ||
|
|
||
| func (c *redisCache) Get(key string) ([]byte, error) { | ||
| start := time.Now() | ||
| defer func() { | ||
| duration := time.Since(start).Seconds() | ||
| observability.StorageOperationDuration.WithLabelValues("cache_get", "redis").Observe(duration) | ||
| }() | ||
|
|
||
| return c.client.Get(context.Background(), key).Bytes() | ||
| } | ||
|
|
||
| func (c *redisCache) Set(key string, value []byte, expiration time.Duration) error { | ||
| start := time.Now() | ||
| defer func() { | ||
| duration := time.Since(start).Seconds() | ||
| observability.StorageOperationDuration.WithLabelValues("cache_set", "redis").Observe(duration) | ||
| }() | ||
|
|
||
| return c.client.Set(context.Background(), key, value, expiration).Err() | ||
| } | ||
|
|
||
| func (c *redisCache) Delete(key string) error { | ||
| return c.client.Del(context.Background(), key).Err() | ||
| } | ||
|
|
||
| func (c *redisCache) GetResizedImage(bucket, path string, width, height uint) ([]byte, error) { | ||
| key := fmt.Sprintf("resize:%s:%s:%d:%d", bucket, path, width, height) | ||
| return c.Get(key) | ||
| } | ||
|
|
||
| func (c *redisCache) SetResizedImage(bucket, path string, width, height uint, data []byte) error { | ||
| key := fmt.Sprintf("resize:%s:%s:%d:%d", bucket, path, width, height) | ||
| // Cache for 24 hours | ||
| return c.Set(key, data, 24*time.Hour) | ||
| } |