@biothings-explorer/query_graph_handler/src/redis-client.js

A nodejs module to query TRAPI Query Graph

const redis = require('redis');
const { promisify } = require('util');

let client;

const enableRedis = !(process.env.REDIS_HOST === undefined) && !(process.env.REDIS_PORT === undefined);

if (enableRedis === true) {
  client = redis.createClient({
    port: process.env.REDIS_PORT,
    host: process.env.REDIS_HOST,
  });
}

const redisClient =
  enableRedis === true
    ? {
        ...client,
        getAsync: promisify(client.get).bind(client),
        setAsync: promisify(client.set).bind(client),
        // hmsetAsync: promisify(client.hmset).bind(client),
        // keysAsync: promisify(client.keys).bind(client),
        // existsAsync: promisify(client.exists).bind(client),
      }
    : {};

module.exports = redisClient;