How to use Node.js 0.8.x domains with express?

Question

How can I create Express/Connect middleware which wrap each request in its own domain?

Answer 1

I've had good luck replacing the stock

var app = express.createServer();

with:

var domainCreate = require('domain').create;
var app = express.createServer(function (req, res, next) {
    var domain = domainCreate();
    domain.run(next);
});

Then in your middleware you can add properties to process.domain or add additional error handling.