cache-panda
Version:
🐼 A flexible, decorator-based smart cache module for NestJS with TTL, key prefixing, and conditional caching based on method execution time.
55 lines • 2.8 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.CachePandaSet = void 0;
const cache_constants_1 = require("../constants/cache.constants");
const XXH = __importStar(require("xxhashjs"));
const reduce_args_util_1 = require("../utils/reduce-args.util");
const cache_panda_service_1 = require("../services/cache-panda.service");
function CachePandaSet(cacheOptions) {
return (target, propertyKey, descriptor) => {
const originalMethod = descriptor.value;
descriptor.value = async function (...args) {
const { ttl, prefix, name, argsIndex, executionTimeLimit = 0, } = cacheOptions;
const cachePandaService = cache_panda_service_1.CachePandaService.getInstance();
const argsKey = (0, reduce_args_util_1.reduceArgsArrayToString)(args, argsIndex, "_");
const hash = XXH.h32(JSON.stringify({ method: propertyKey, args }), cache_constants_1.CACHE_KEY_HASH_SEED).toString();
const keyParts = [prefix, name, argsKey, hash].filter(Boolean);
const cacheKey = keyParts.join(":");
const cachedResult = await cachePandaService.getCache(cacheKey);
if (cachedResult)
return JSON.parse(cachedResult);
const startTime = performance.now();
const result = await originalMethod.apply(this, args);
const execTime = performance.now() - startTime;
if (execTime >= executionTimeLimit) {
await cachePandaService.setCache(cacheKey, JSON.stringify(result), ttl);
}
return result;
};
};
}
exports.CachePandaSet = CachePandaSet;
//# sourceMappingURL=cache-panda-set.decorator.js.map