import { hash } from 'ohash'
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const CacheInvalidationStrategy = Object.freeze({
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CLEAR_ALL: 'clear_all',
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CLEAR_CURRENT: 'clear_current',
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CLEAR_PAGINATION: 'clear_pagination',
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KEEP_ALL: 'keep_all'
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})
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class TableCache {
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constructor(cacheTime = 5 * 60 * 1e3, maxSize = 50, enableLog = false) {
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this.cache = new Map()
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this.cacheTime = cacheTime
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this.maxSize = maxSize
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this.enableLog = enableLog
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}
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// 内部日志工具
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log(message, ...args) {
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if (this.enableLog) {
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console.log(`[TableCache] ${message}`, ...args)
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}
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}
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// 生成稳定的缓存键
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generateKey(params) {
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return hash(params)
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}
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// 🔧 优化：增强类型安全性
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generateTags(params) {
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const tags = /* @__PURE__ */ new Set()
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const searchKeys = Object.keys(params).filter(
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(key) =>
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!['current', 'size', 'total'].includes(key) &&
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params[key] !== void 0 &&
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params[key] !== '' &&
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params[key] !== null
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)
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if (searchKeys.length > 0) {
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const searchTag = searchKeys.map((key) => `${key}:${String(params[key])}`).join('|')
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tags.add(`search:${searchTag}`)
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} else {
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tags.add('search:default')
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}
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tags.add(`pagination:${params.size || 10}`)
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tags.add('pagination')
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return tags
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}
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// 🔧 优化：LRU 缓存清理
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evictLRU() {
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if (this.cache.size <= this.maxSize) return
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let lruKey = ''
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let minAccessCount = Infinity
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let oldestTime = Infinity
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for (const [key, item] of this.cache.entries()) {
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if (
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item.accessCount < minAccessCount ||
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(item.accessCount === minAccessCount && item.lastAccessTime < oldestTime)
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) {
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lruKey = key
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minAccessCount = item.accessCount
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oldestTime = item.lastAccessTime
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}
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}
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if (lruKey) {
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this.cache.delete(lruKey)
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this.log(`LRU 清理缓存: ${lruKey}`)
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}
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}
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// 设置缓存
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set(params, data, response) {
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const key = this.generateKey(params)
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const tags = this.generateTags(params)
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const now = Date.now()
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this.evictLRU()
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this.cache.set(key, {
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data,
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response,
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timestamp: now,
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params: key,
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tags,
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accessCount: 1,
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lastAccessTime: now
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})
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}
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// 获取缓存
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get(params) {
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const key = this.generateKey(params)
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const item = this.cache.get(key)
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if (!item) return null
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if (Date.now() - item.timestamp > this.cacheTime) {
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this.cache.delete(key)
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return null
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}
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item.accessCount++
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item.lastAccessTime = Date.now()
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return item
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}
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// 根据标签清除缓存
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clearByTags(tags) {
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let clearedCount = 0
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for (const [key, item] of this.cache.entries()) {
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const hasMatchingTag = tags.some((tag) =>
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Array.from(item.tags).some((itemTag) => itemTag.includes(tag))
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)
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if (hasMatchingTag) {
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this.cache.delete(key)
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clearedCount++
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}
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}
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return clearedCount
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}
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// 清除当前搜索条件的缓存
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clearCurrentSearch(params) {
|
const key = this.generateKey(params)
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const deleted = this.cache.delete(key)
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return deleted ? 1 : 0
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}
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// 清除分页缓存
|
clearPagination() {
|
return this.clearByTags(['pagination'])
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}
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// 清空所有缓存
|
clear() {
|
this.cache.clear()
|
}
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// 获取缓存统计信息
|
getStats() {
|
const total = this.cache.size
|
let totalSize = 0
|
let totalAccess = 0
|
for (const item of this.cache.values()) {
|
totalSize += JSON.stringify(item.data).length
|
totalAccess += item.accessCount
|
}
|
const sizeInKB = (totalSize / 1024).toFixed(2)
|
const avgHits = total > 0 ? (totalAccess / total).toFixed(1) : '0'
|
return {
|
total,
|
size: `${sizeInKB}KB`,
|
hitRate: `${avgHits} avg hits`
|
}
|
}
|
// 清理过期缓存
|
cleanupExpired() {
|
let cleanedCount = 0
|
const now = Date.now()
|
for (const [key, item] of this.cache.entries()) {
|
if (now - item.timestamp > this.cacheTime) {
|
this.cache.delete(key)
|
cleanedCount++
|
}
|
}
|
return cleanedCount
|
}
|
}
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export { CacheInvalidationStrategy, TableCache }
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