Listen to All Emitted Events in Node.js

Question

In Node.js is there any way to listen to all events emitted by an EventEmitter object?

e.g., can you do something like...

event_emitter.on(\         


        

Answer 1

Here's a debug tool inspired by Martin's answer (https://stackoverflow.com/a/18087021/1264797). I just now used this to figure out what was going wrong in a set of streams by logging all of their events to the console. Works great. As Martin illustrates, OP could use it by replacing the console.log() call with a websocket sender.

function debug_emitter(emitter, name) {
    var orig_emit = emitter.emit;
    emitter.emit = function() {
        var emitArgs = arguments;
        console.log("emitter " + name + " " + util.inspect(emitArgs));
        orig_emit.apply(emitter, arguments);
    }
}