reshuffle/examples/persistence/SQLExample.js

Reshuffle is a fast, unopinionated, minimalist integration framework

const { Reshuffle, CronConnector, SQLStoreAdapter } = require('../..')
const { Pool } = require('pg')
const app = new Reshuffle()

const connector = new CronConnector(app)

// see https://node-postgres.com/features/connecting on how to configure the pool
const pool = new Pool()
const persistentStore = new SQLStoreAdapter(pool, 'reshuffledb')
app.setPersistentStore(persistentStore)

connector.on({ expression: '*/5 * * * * *' }, async (event, app) => {
  const store = app.getPersistentStore()
  // single server setup
  let times = (await store.get('scripts/times-said-hello')) || 0
  console.log(`Hello World! ${times} times.`)
  times++
  await store.set('scripts/times-said-hello', times)

  // for destributed setup with many reshuffle servers set() should be replaced with update()
  let safe_count_times = (await store.get('scripts/times-said-hello-safe_count_times')) || 0
  console.log(`Hello World! safe count = ${safe_count_times} times.`)
  await store.update('scripts/times-said-hello-safe_count_times', (safe_count_times) => {
    return safe_count_times === undefined ? 1 : safe_count_times + 1
  })
})

app.start()