Improve Redis efficiency and speed with pipelining

src/redis.go

@@ -27,78 +27,31 @@ func (r *Redis) Connect() error {
 	return r.Client.Ping(ctx).Err()
 }
 
-func (r *Redis) Exists(key string) (bool, error) {
+func (r *Redis) Get(key string) ([]byte, time.Duration, error) {
 	if r.Client == nil {
-		return false, nil
+		return nil, 0, nil
 	}
 
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
 
 	defer cancel()
 
-	res := r.Client.Exists(ctx, key)
+	p := r.Client.Pipeline()
 
-	if err := res.Err(); err != nil {
-		return false, err
+	value := p.Get(ctx, key)
+	ttl := p.TTL(ctx, key)
+
+	if _, err := p.Exec(ctx); err != nil {
+		if err == redis.Nil {
+			return nil, 0, nil
 		}
 
-	val, err := res.Result()
-
-	return val == 1, err
+		return nil, 0, err
 	}
 
-func (r *Redis) TTL(key string) (time.Duration, error) {
-	if r.Client == nil {
-		return 0, nil
-	}
+	data, err := value.Bytes()
 
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
-
-	defer cancel()
-
-	res := r.Client.TTL(ctx, key)
-
-	if err := res.Err(); err != nil {
-		return 0, err
-	}
-
-	return res.Result()
-}
-
-func (r *Redis) GetString(key string) (string, error) {
-	if r.Client == nil {
-		return "", nil
-	}
-
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
-
-	defer cancel()
-
-	res := r.Client.Get(ctx, key)
-
-	if err := res.Err(); err != nil {
-		return "", nil
-	}
-
-	return res.Result()
-}
-
-func (r *Redis) GetBytes(key string) ([]byte, error) {
-	if r.Client == nil {
-		return nil, nil
-	}
-
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
-
-	defer cancel()
-
-	res := r.Client.Get(ctx, key)
-
-	if err := res.Err(); err != nil {
-		return nil, err
-	}
-
-	return res.Bytes()
+	return data, ttl.Val(), err
 }
 
 func (r *Redis) Set(key string, value interface{}, ttl time.Duration) error {

src/routes.go

@@ -38,9 +38,9 @@ func JavaStatusHandler(ctx *fiber.Ctx) error {
 		return err
 	}
 
-	ctx.Set("X-Cache-Hit", strconv.FormatBool(expiresAt != nil))
+	ctx.Set("X-Cache-Hit", strconv.FormatBool(expiresAt != 0))
 
-	if expiresAt != nil {
+	if expiresAt != 0 {
 		ctx.Set("X-Cache-Time-Remaining", strconv.Itoa(int(expiresAt.Seconds())))
 	}
 
@@ -64,9 +64,9 @@ func BedrockStatusHandler(ctx *fiber.Ctx) error {
 		return err
 	}
 
-	ctx.Set("X-Cache-Hit", strconv.FormatBool(expiresAt != nil))
+	ctx.Set("X-Cache-Hit", strconv.FormatBool(expiresAt != 0))
 
-	if expiresAt != nil {
+	if expiresAt != 0 {
 		ctx.Set("X-Cache-Time-Remaining", strconv.Itoa(int(expiresAt.Seconds())))
 	}
 
@@ -86,9 +86,9 @@ func IconHandler(ctx *fiber.Ctx) error {
 		return err
 	}
 
-	ctx.Set("X-Cache-Hit", strconv.FormatBool(expiresAt != nil))
+	ctx.Set("X-Cache-Hit", strconv.FormatBool(expiresAt != 0))
 
-	if expiresAt != nil {
+	if expiresAt != 0 {
 		ctx.Set("X-Cache-Time-Remaining", strconv.Itoa(int(expiresAt.Seconds())))
 	}
 

src/status.go

@@ -87,117 +87,89 @@ type Mod struct {
 	Version string `json:"version"`
 }
 
-func GetJavaStatus(host string, port uint16) (*JavaStatusResponse, *time.Duration, error) {
+func GetJavaStatus(host string, port uint16) (*JavaStatusResponse, time.Duration, error) {
 	cacheKey := fmt.Sprintf("java:%s-%d", host, port)
 
-	exists, err := r.Exists(cacheKey)
+	cache, ttl, err := r.Get(cacheKey)
 
 	if err != nil {
-		return nil, nil, err
-	}
-
-	if exists {
-		data, err := r.GetBytes(cacheKey)
-
-		if err != nil {
-			return nil, nil, err
+		return nil, 0, err
 	}
 
+	if cache != nil {
 		var response JavaStatusResponse
 
-		if err = json.Unmarshal(data, &response); err != nil {
-			return nil, nil, err
-		}
+		err = json.Unmarshal(cache, &response)
 
-		ttl, err := r.TTL(cacheKey)
-
-		return &response, &ttl, err
+		return &response, ttl, err
 	}
 
 	response, err := FetchJavaStatus(host, port)
 
 	if err != nil {
-		return nil, nil, err
+		return nil, 0, err
 	}
 
 	data, err := json.Marshal(response)
 
 	if err != nil {
-		return nil, nil, err
+		return nil, 0, err
 	}
 
 	if err := r.Set(cacheKey, data, config.Cache.JavaStatusDuration); err != nil {
-		return nil, nil, err
+		return nil, 0, err
 	}
 
-	return response, nil, nil
+	return response, 0, nil
 }
 
-func GetBedrockStatus(host string, port uint16) (*BedrockStatusResponse, *time.Duration, error) {
+func GetBedrockStatus(host string, port uint16) (*BedrockStatusResponse, time.Duration, error) {
 	cacheKey := fmt.Sprintf("bedrock:%s-%d", host, port)
 
-	exists, err := r.Exists(cacheKey)
+	cache, ttl, err := r.Get(cacheKey)
 
 	if err != nil {
-		return nil, nil, err
-	}
-
-	if exists {
-		data, err := r.GetBytes(cacheKey)
-
-		if err != nil {
-			return nil, nil, err
+		return nil, 0, err
 	}
 
+	if cache != nil {
 		var response BedrockStatusResponse
 
-		if err = json.Unmarshal(data, &response); err != nil {
-			return nil, nil, err
-		}
+		err = json.Unmarshal(cache, &response)
 
-		ttl, err := r.TTL(cacheKey)
-
-		return &response, &ttl, err
+		return &response, ttl, err
 	}
 
 	response, err := FetchBedrockStatus(host, port)
 
 	if err != nil {
-		return nil, nil, err
+		return nil, 0, err
 	}
 
 	data, err := json.Marshal(response)
 
 	if err != nil {
-		return nil, nil, err
+		return nil, 0, err
 	}
 
 	if err := r.Set(cacheKey, data, config.Cache.BedrockStatusDuration); err != nil {
-		return nil, nil, err
+		return nil, 0, err
 	}
 
-	return response, nil, nil
+	return response, 0, nil
 }
 
-func GetServerIcon(host string, port uint16) ([]byte, *time.Duration, error) {
+func GetServerIcon(host string, port uint16) ([]byte, time.Duration, error) {
 	cacheKey := fmt.Sprintf("icon:%s-%d", host, port)
 
-	exists, err := r.Exists(cacheKey)
+	cache, ttl, err := r.Get(cacheKey)
 
 	if err != nil {
-		return nil, nil, err
+		return nil, 0, err
 	}
 
-	if exists {
-		data, err := r.GetBytes(cacheKey)
-
-		if err != nil {
-			return nil, nil, err
-		}
-
-		ttl, err := r.TTL(cacheKey)
-
-		return data, &ttl, err
+	if cache != nil {
+		return cache, ttl, err
 	}
 
 	icon := defaultIcon
@@ -208,17 +180,17 @@ func GetServerIcon(host string, port uint16) ([]byte, *time.Duration, error) {
 		data, err := base64.StdEncoding.DecodeString(strings.TrimPrefix(*status.Favicon, "data:image/png;base64,"))
 
 		if err != nil {
-			return nil, nil, err
+			return nil, 0, err
 		}
 
 		icon = data
 	}
 
 	if err := r.Set(cacheKey, icon, config.Cache.IconDuration); err != nil {
-		return nil, nil, err
+		return nil, 0, err
 	}
 
-	return icon, nil, nil
+	return icon, 0, nil
 }
 
 func FetchJavaStatus(host string, port uint16) (*JavaStatusResponse, error) {