How does nodejs execute code (event loop)?

[Bodo Kaiser]

Hello,

this question is coming up in me for a while since I have learned more and more about the features nodejs can provide.

1. I would like to know how a nodejs lifecycle looks like that mean from the kernel which is sharing events through kqueue, epoll and so on.

2. I also would like to know how I can imagine concurrency and how they get the async calls to be not blocking.

Would be great if someone could answer me the questions or share some links.

Regards,

Bodo

[Angel Java Lopez]

Hi people!

Bodo, one link I read:

http://blog.mixu.net/2011/02/01/understanding-the-node-js-event-loop/

But now, node.js is based on libuv, instead of libev:

https://github.com/joyent/libuv

Excellent resource:

http://nikhilm.github.com/uvbook/

From http://nikhilm.github.com/uvbook/introduction.html#who-this-book-is-for

Background

The node.js project began in 2009 as a JavaScript environment decoupled from the browser. Using Google’s V8 and Marc Lehmann’s libev, node.js combined a model of I/O – evented – with a language that was well suited to the style of programming; due to the way it had been shaped by browsers. As node.js grew in popularity, it was important to make it work on Windows, but libev ran only on Unix. The Windows equivalent of kernel event notification mechanisms like kqueue or (e)poll is IOCP. libuv is an abstraction around libev or IOCP depending on the platform, providing users an API based on libev. As of the node-v0.9.0 version of libuv, libev has been removed and libuv directly interfaces with Unix.

Another resource

http://blog.nodejs.org/2012/09/30/bert-belder-libuv-lxjs-2012/

Angel "Java" Lopez

@ajlopez

gh:ajlopez

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[Bodo Kaiser]

Hey,

I found this section answering my question: http://nikhilm.github.com/uvbook/basics.html

Thank you for sharing the links, I wish you a nice weekend.

Regards,

Bodo