Accessing Node's module cache to build a collection of event processors

gistfile1.js

// My app uses event sourcing, and I need a collection of all the app's event processors.
// I don't want to maintain this collection by hand, changing every time I add a new processor.
// So, I build up the collection dynamically when the app starts by examining the module cache.
// Caveat: I have no idea whether accessing `require.cache` is supported.
// Note: An event processor is any exported constructor function that ends with 'EventProcessor'.
exports.buildEventProcessorCollection = function() {
  var eventProcessors = { };

  for (var id in require.cache) {
    var mod = require.cache[id];
    for (var id in mod.exports) {
      var exp = mod.exports[id];
      // in non-sample code this would probably be an endsWith function added to String's prototype.
      if (id.indexOf("EventProcessor", id.length - 14) !== -1 && typeof(exp) === 'function')
        eventProcessors[id] = new exp();
    }
  }

  return eventProcessors;
}