Cleaning up streams with internal intervals

[Kristian Lyngbæk]

I have subclassed a transform stream. As part of the constructor function I set up an interval. I need to make sure I clear this interval when the stream is done, so I don't have a memory leak. Where is the best place to do this?

I am considering using the end-of-stream module to detect when the stream instance is finished to trigger the clearTimeout. Is there any edge case I would miss by doing this?

var eos = require('end-of-stream');

function SomeTransformStream() {
    Transform.call(this);

    var self = this;
    // on constructor, setup timeout
    this._timeoutId = setTimeout(function () {
        self.doSomething(); // some code I need called
    });
    // on end of stream destroy self
    eos(this, function() {
        // is this thorough enough?
        clearTimeout(_self.timeoutId);
    });

    // ... some more stuff
}

Thanks in advance.