清理代码

pkg/middleware/config/config_memory.go

@@ -0,0 +1,106 @@
+package config
+
+import (
+	"context"
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"sync"
+	"time"
+
+	"go.uber.org/zap"
+)
+
+// ConfigMemory 一个简单的内存配置归档，仅用于测试
+type ConfigMemory struct {
+	data  sync.Map
+	store string
+}
+
+func NewConfigMemory(store string) (KVConfig, error) {
+	ret := &ConfigMemory{
+		store: store,
+		data:  sync.Map{},
+	}
+	if store != "" {
+		zap.L().Info("parse config from store", zap.String("store", store))
+		if err := os.MkdirAll(filepath.Dir(store), 0o755); err != nil && !os.IsExist(err) {
+			return nil, err
+		}
+		item := make(map[string]ConfigContent)
+		data, err := os.ReadFile(store)
+		if err != nil && !os.IsNotExist(err) {
+			return nil, err
+		}
+		if err == nil {
+			err = json.Unmarshal(data, &item)
+			if err != nil {
+				return nil, err
+			}
+		}
+		for key, content := range item {
+			if content.Ttl == nil || time.Now().Before(*content.Ttl) {
+				ret.data.Store(key, content)
+			}
+		}
+		clear(item)
+	}
+	return ret, nil
+}
+
+type ConfigContent struct {
+	Data string     `json:"data"`
+	Ttl  *time.Time `json:"ttl,omitempty"`
+}
+
+func (m *ConfigMemory) Put(ctx context.Context, key string, value string, ttl time.Duration) error {
+	d := time.Now().Add(ttl)
+	td := &d
+	if ttl == -1 {
+		td = nil
+	}
+	m.data.Store(key, ConfigContent{
+		Data: value,
+		Ttl:  td,
+	})
+	return nil
+}
+
+func (m *ConfigMemory) Get(ctx context.Context, key string) (string, error) {
+	if value, ok := m.data.Load(key); ok {
+		content := value.(ConfigContent)
+		if content.Ttl != nil && time.Now().After(*content.Ttl) {
+			return "", os.ErrNotExist
+		}
+		return content.Data, nil
+	}
+	return "", os.ErrNotExist
+}
+
+func (m *ConfigMemory) Delete(ctx context.Context, key string) error {
+	m.data.Delete(key)
+	return nil
+}
+
+func (m *ConfigMemory) Close() error {
+	defer m.data.Clear()
+	if m.store != "" {
+		item := make(map[string]ConfigContent)
+		now := time.Now()
+		m.data.Range(
+			func(key, value interface{}) bool {
+				content := value.(ConfigContent)
+				if content.Ttl == nil || now.Before(*content.Ttl) {
+					item[key.(string)] = content
+				}
+				return true
+			})
+		zap.L().Debug("回写内容到本地存储", zap.String("store", m.store), zap.Int("length", len(item)))
+		saved, err := json.Marshal(item)
+		if err != nil {
+			return err
+		}
+		return os.WriteFile(m.store, saved, 0o600)
+	}
+	return nil
+}