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.register(connector);

// 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);

app.when(connector.on({'interval':5000}), async (event) =>  {
  let store = event.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()