qus-node-redis-cache
Version:
redis cache for nestjs
139 lines (138 loc) • 7.25 kB
JavaScript
;
var __esDecorate = (this && this.__esDecorate) || function (ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {
function accept(f) { if (f !== void 0 && typeof f !== "function") throw new TypeError("Function expected"); return f; }
var kind = contextIn.kind, key = kind === "getter" ? "get" : kind === "setter" ? "set" : "value";
var target = !descriptorIn && ctor ? contextIn["static"] ? ctor : ctor.prototype : null;
var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});
var _, done = false;
for (var i = decorators.length - 1; i >= 0; i--) {
var context = {};
for (var p in contextIn) context[p] = p === "access" ? {} : contextIn[p];
for (var p in contextIn.access) context.access[p] = contextIn.access[p];
context.addInitializer = function (f) { if (done) throw new TypeError("Cannot add initializers after decoration has completed"); extraInitializers.push(accept(f || null)); };
var result = (0, decorators[i])(kind === "accessor" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);
if (kind === "accessor") {
if (result === void 0) continue;
if (result === null || typeof result !== "object") throw new TypeError("Object expected");
if (_ = accept(result.get)) descriptor.get = _;
if (_ = accept(result.set)) descriptor.set = _;
if (_ = accept(result.init)) initializers.unshift(_);
}
else if (_ = accept(result)) {
if (kind === "field") initializers.unshift(_);
else descriptor[key] = _;
}
}
if (target) Object.defineProperty(target, contextIn.name, descriptor);
done = true;
};
var __runInitializers = (this && this.__runInitializers) || function (thisArg, initializers, value) {
var useValue = arguments.length > 2;
for (var i = 0; i < initializers.length; i++) {
value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);
}
return useValue ? value : void 0;
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __setFunctionName = (this && this.__setFunctionName) || function (f, name, prefix) {
if (typeof name === "symbol") name = name.description ? "[".concat(name.description, "]") : "";
return Object.defineProperty(f, "name", { configurable: true, value: prefix ? "".concat(prefix, " ", name) : name });
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.StringCachingService = void 0;
/*
* MIT License
*
* Copyright (c) 2025 Quantum Unit Solutions
* Author: David Meikle
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
const common_1 = require("@nestjs/common");
const redis_1 = require("redis");
let StringCachingService = (() => {
let _classDecorators = [(0, common_1.Injectable)()];
let _classDescriptor;
let _classExtraInitializers = [];
let _classThis;
var StringCachingService = _classThis = class {
constructor(ttl, keyPrefix, url) {
var _a;
this.ttl = ttl;
this.keyPrefix = keyPrefix;
this._client = null;
this.logger = new common_1.Logger(this.constructor.name);
this.url = (_a = process.env.REDIS_SERVER) !== null && _a !== void 0 ? _a : 'redis://localhost:6379';
if (url) {
this.url = url;
}
this._client = (0, redis_1.createClient)({ url: this.url });
this._client.connect().catch(err => this.logger.error('Redis connection error', err));
}
getClient() {
if (!this._client) {
throw new Error('Redis client not obtained');
}
return this._client;
}
getFromCache(key, fetchData, ...args) {
return __awaiter(this, void 0, void 0, function* () {
const client = this.getClient();
const prefixedKey = `${this.keyPrefix}${key}`;
if (yield client.exists(prefixedKey)) {
const cacheResult = yield client.get(prefixedKey);
if (cacheResult) {
return cacheResult;
}
}
const result = yield fetchData(key, ...args);
yield client.setEx(prefixedKey, this.ttl, result);
return result;
});
}
getKeyPrefix() {
return this.keyPrefix;
}
clearCache(key) {
return __awaiter(this, void 0, void 0, function* () {
const client = this.getClient();
const prefixedKey = `${this.keyPrefix}${key}`;
yield client.del(prefixedKey);
});
}
};
__setFunctionName(_classThis, "StringCachingService");
(() => {
const _metadata = typeof Symbol === "function" && Symbol.metadata ? Object.create(null) : void 0;
__esDecorate(null, _classDescriptor = { value: _classThis }, _classDecorators, { kind: "class", name: _classThis.name, metadata: _metadata }, null, _classExtraInitializers);
StringCachingService = _classThis = _classDescriptor.value;
if (_metadata) Object.defineProperty(_classThis, Symbol.metadata, { enumerable: true, configurable: true, writable: true, value: _metadata });
__runInitializers(_classThis, _classExtraInitializers);
})();
return StringCachingService = _classThis;
})();
exports.StringCachingService = StringCachingService;