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mtr-cache

v1.1.0

Published

Library ini akan menyimpan response ke dalam Redis' cache ### Dependency Library ini menggunakan package [**bluebird v3.5.5**](https://www.npmjs.com/package/bluebird) dan [**redis v2.8.0**](https://www.npmjs.com/package/redis). ### Installation ```bas

Downloads

2

Readme

Health Check Library

Library ini akan menyimpan response ke dalam Redis' cache

Dependency

Library ini menggunakan package bluebird v3.5.5 dan redis v2.8.0.

Installation

npm i git+ssh://[email protected]/mtr-platform/libs/redis-cache#v1.1.0

Penggunaan

Deklarasikan module library di dalam file app.js.

const { setRedis } = require('mtr-cache');

const redisHost = env.REDIS_HOST || '127.0.0.1';
const redisPort = Number(env.REDIS_PORT) || '6379';
setRedis(redisHost, redisPort);

Buat sebuah middleware untuk melakukan pengecekan cache, middleware dapat dibuat secara individu per endpoint atau dapat dibuat secara global pada app.js. Berikut adalah contoh bila dibuat secara individu per endpoint:

const { response } = require('mtr-response');
const { mwCache } = require('mtr-cache');

const { env } = process;
const svc = env.SVC_NAME || 'Meteor';

module.exports = async (req, res, next) => {
  const {
    'x-forwarded-path': Path, 'x-forwarded-method': Method, 'x-app-key': appKey, 'x-forwarded-authorization': Authorization,
  } = req.headers;
  const key = `${svc}-svc_p:${(path.split('?')[0])}_m:${Method}_k:${appKey}_a:${Authorization}`;
  await mwCache(key)
    .then(ok => response(200, ok, res))
    .catch(err => response(400, err, res));
};

Menyimpan Cache

Berikut adalah contoh penggunaanya:

const { storeCache } = require('mtr-cache');

const svcName = env.SVC_NAME || 'Meteor';

module.exports = async (req, res) => {
  const key = `${svcName}-svc_p:${(path.split('?')[0])}_m:${method}_k:${xAppKey}_a:${auth !== undefined ? auth : '-'}`;
  const redisVal = 'OK';
  const ttl = 15;
  await storeCache(key, redisVal, ttl)
    .then(() => response(200, { key, redisVal }, res))
    .catch(err => response(400, err, res));
};

Pembersihan Cache

Seluruh cache dari satu service dapat dibersihkan dengan function purgeCache(keypart). Berikut adalah contoh penggunaannya:

const { response } = require('mtr-response');
const { purgeCache } = require('mtr-cache');

const svcName = env.SVC_NAME || 'Meteor';

module.exports = async (req, res) => {
  const replies = await purgeCache(`${svcName}-svc`);
  if (replies) response(200, 'Cache purged!', res);
  response(400, 'Cache purge failed!', res);
};