vtils/utils/asyncMemoize.js

一个面向业务的 JavaScript/TypeScript 实用程序库。

/**
 * 异步函数执行缓存。
 *
 * @param asyncFn 异步函数
 * @param options 选项
 */
export function asyncMemoize(asyncFn, options) {
  if (options === void 0) {
    options = {};
  }
  var _options = options,
    _options$cacheKey = _options.cacheKey,
    cacheKey = _options$cacheKey === void 0 ? function () {
      return arguments.length <= 0 ? undefined : arguments[0];
    } : _options$cacheKey,
    cacheTTL = _options.cacheTTL;
  var cache = new Map();
  var call = function call() {
    var _cacheKey = cacheKey.apply(void 0, arguments);
    var cacheValue = cache.get(_cacheKey);
    var currentMs = Date.now();
    if (cacheValue && (cacheValue.expiredAt ? currentMs < cacheValue.expiredAt : true)) {
      return cacheValue.value;
    }
    var cacheValueNew = asyncFn.apply(void 0, arguments);
    cacheValueNew.catch(function () {
      return cache.delete(_cacheKey);
    });
    cache.set(_cacheKey, {
      value: cacheValueNew,
      expiredAt: cacheTTL ? currentMs + cacheTTL : 0
    });
    return cacheValueNew;
  };
  call.cache = cache;
  return call;
}