Domains & Promises

domains-and-promises.js

var domain = require('domain');
var d = domain.create();

// Example 1: callback style
d.run(() => {
  console.log('Initial domain is', process.domain);
  setTimeout(() => {
    console.log('Final domain is', process.domain); // good
  }, 1000);
});

// Example 2: promises
d.run(() => {
  console.log('Initial domain is', process.domain);
  Promise.resolve('foo').then(() => {
    console.log('Final domain is', process.domain); // undefined!
  });
});

// Example 3: Bluebird promises (tested with 3.5.0)
var Promise = require('bluebird');
d.run(() => {
  console.log('Initial domain is', process.domain);
  Promise.resolve('foo').then(() => {
    console.log('Final domain is', process.domain); // good
  });
});

// Solution: global.Promise = require('bluebird');