@srsl/tools/constructors/redis.js

JavaScript tools for common interfaces

const bluebird = require('bluebird')
const { createClient, RedisClient, Multi } = require('redis')

const { sleep } = require('../utils')

module.exports = async (
  attempts = Infinity,
  interval = 3000,
  onError = (e) => console.error('[Redis] Connection Error', e),
  host = process.env.REDIS_HOST,
  port = process.env.REDIS_PORT
) => {
  console.log(`[Redis] Connecting to redis host ${host}:${port}...`)
  try {
    /* Use promises for Redis methods */
    bluebird.promisifyAll(RedisClient.prototype)
    bluebird.promisifyAll(Multi.prototype)
    const client = await createClient({
      host,
      port,
    })
    client.on('error', err => console.error('[Redis] Error:', err))
    console.log('[Redis] Connected.')
    return client
  } catch (e) {
    onError(e)
    await sleep(interval)
    if (attempts === 0) return onError()
    return run(attempts, interval, onError)
  }
}