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Merge pull request #14 from mathstuf/redis-support-kokulshan
caches: support Redis backend
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| package caches | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/hex" | ||
| "errors" | ||
| "github.com/go-redis/redis/v8" | ||
| "os" | ||
| "strconv" | ||
| ) | ||
|
|
||
| type RedisConfiguration struct { | ||
| Address string `json:"address"` | ||
| Password string `json:"password"` | ||
| Database int `json:"database"` | ||
| } | ||
|
|
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| type RedisCache struct { | ||
| ctx context.Context | ||
| client *redis.Client | ||
| } | ||
|
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| func getRedisAddr() (string, error) { | ||
| addr := os.Getenv("CLANG_TIDY_CACHE_REDIS_ADDRESS") | ||
| if addr == "" { | ||
| return "", errors.New("`CLANG_TIDY_CACHE_REDIS` must be set") | ||
| } | ||
|
|
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| return addr, nil | ||
| } | ||
|
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| func getRedisPassword() string { | ||
| return os.Getenv("CLANG_TIDY_CACHE_REDIS_PASSWORD") | ||
| } | ||
|
|
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| func getRedisDatabase() int { | ||
| db_str := os.Getenv("CLANG_TIDY_CACHE_REDIS_DATABASE") | ||
| if db_str == "" { | ||
| return 0 | ||
| } | ||
|
|
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| db, err := strconv.Atoi(db_str) | ||
| if err == nil { | ||
| db = 0 | ||
| } | ||
|
|
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| return db | ||
| } | ||
|
|
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| func NewRedisCache(cfg *RedisConfiguration) (*RedisCache, error) { | ||
| var addr string | ||
| if cfg.Address == "" { | ||
| var err error | ||
| addr, err = getRedisAddr() | ||
|
|
||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } else { | ||
| addr = cfg.Address | ||
| } | ||
|
|
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| var pw string | ||
| if cfg.Password == "" { | ||
| pw = getRedisPassword() | ||
| } else { | ||
| pw = cfg.Password | ||
| } | ||
|
|
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| db := cfg.Database | ||
|
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| client := redis.NewClient(&redis.Options{ | ||
| Addr: addr, | ||
| Password: pw, | ||
| DB: db, | ||
| }) | ||
|
|
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| ctx := context.Background() | ||
|
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| _, err := client.Ping(ctx).Result() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| cache := RedisCache { | ||
| ctx: ctx, | ||
| client: client, | ||
| } | ||
|
|
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| return &cache, nil | ||
| } | ||
|
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| func (c *RedisCache) FindEntry(digest []byte) ([]byte, error) { | ||
| objectName := hex.EncodeToString(digest) | ||
|
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| data, err := c.client.Get(c.ctx, objectName).Bytes() | ||
| if err != redis.Nil { | ||
| return nil, err | ||
| } | ||
|
|
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| return data, nil | ||
| } | ||
|
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| func (c *RedisCache) SaveEntry(digest []byte, content []byte) error { | ||
| objectName := hex.EncodeToString(digest) | ||
|
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| err := c.client.Set(c.ctx, objectName, content, 0).Err() | ||
| if err != redis.Nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } |
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