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redis_simple_cache.go
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/
redis_simple_cache.go
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package dorm
import (
"context"
"github.com/dtapps/go-library/utils/gojson"
"time"
)
const (
SerializerJson = "json"
SerializerString = "string"
)
type JsonGttFunc func() interface{}
type DBGttFunc func() string
// SimpleCache 缓存
type SimpleCache struct {
Operation *StringOperation // 操作类
Expire time.Duration // 过去时间
DBGetter DBGttFunc // 缓存不存在的操作 DB
JsonGetter JsonGttFunc // 缓存不存在的操作 JSON
Serializer string // 序列化方式
}
// NewSimpleCache 构造函数
func (r *RedisClient) NewSimpleCache(operation *StringOperation, expire time.Duration, serializer string) *SimpleCache {
return &SimpleCache{
Operation: operation, // 操作类
Expire: expire, // 过去时间
Serializer: serializer, // 缓存不存在的操作 DB
}
}
// SetCache 设置缓存
func (c *SimpleCache) SetCache(ctx context.Context, key string, value interface{}) {
c.Operation.Set(ctx, key, value, WithExpire(c.Expire)).Unwrap()
}
// GetCache 获取缓存
func (c *SimpleCache) GetCache(ctx context.Context, key string) (ret interface{}) {
if c.Serializer == SerializerJson {
f := func() string {
obj := c.JsonGetter()
b, err := gojson.Marshal(obj)
if err != nil {
return ""
}
return string(b)
}
ret = c.Operation.Get(ctx, key).UnwrapOrElse(f)
c.SetCache(ctx, key, ret)
} else if c.Serializer == SerializerString {
f := func() string {
return c.DBGetter()
}
ret = c.Operation.Get(ctx, key).UnwrapOrElse(f)
c.SetCache(ctx, key, ret)
}
return
}