cache.ts•1.6 kB
/**
* 缓存工具类，缓存组件信息
*/
interface CacheOptions {
/**
* 缓存过期时间（毫秒）
*/
ttl: number
}
interface CacheItem<Value> {
/**
* 过期时间戳
*/
expireAt: number
/**
* 缓存值
*/
value: Value
}
const DEFAULT_TTL = 1000 * 60 * 10;
/**
* 缓存工具类
* 默认过期时间 10 分钟
*/
export class Cache<CacheData extends Record<string, any>> {
private cache: Map<keyof CacheData, CacheItem<CacheData[keyof CacheData]>> = new Map()
private ttl: number;
constructor(options?: CacheOptions) {
this.ttl = options?.ttl || DEFAULT_TTL;
}
/**
* 缓存组件信息
* @param key
* @param value
*/
public set<CacheKey extends keyof CacheData>(key: CacheKey, value: CacheData[CacheKey]) {
this.cache.set(key, {
expireAt: Date.now() + this.ttl,
value
})
}
/**
* 获取组件信息
* @param key 组件key
* @returns 组件信息
*/
public get<CacheKey extends keyof CacheData>(key: CacheKey): CacheData[CacheKey] | undefined {
const value = this.cache.get(key)
if (!value) return undefined
if (value.expireAt <= Date.now()) {
this.cache.delete(key)
return undefined
}
return value.value
}
/**
* 删除组件信息
* @param key 组件key
*/
public delete(key: keyof CacheData) {
this.cache.delete(key)
}
/**
* 清空缓存
*/
public clear() {
this.cache.clear()
}
}