Non-blocking IO & Event Loop

How Node.js handles concurrency (by supporting non-blocking IO) using an Event Loop.

Transcript

1. non-blocking IO,
2. How to handle concurrency?
3. Start a new thread per each client
4. That sort things out right? Now you can rest easy
5. __Truth__
6. How do we perform computation?
7. =>Synchronous =>Fork a new process =>Threads
8. __Classic Example__ Kottu Joint
9. New Type of Kottu Joint
10. Event based Kottu Joint
11. So how is this implemented in Node?
12. Callbacks ^_^
13. app.router.get('/page/viewProject', function () { var response = this.res; var request = this.req; var projectid = url.parse(request.url, true).query.projectid; dataModel.Project.findOne({_id:projectid}, function(err,project){ app.render("viewProject", project, function(result){ response.writeHead(200, { 'Content-Type': 'text/html' }); response.end(result); }); });});
14. Single threaded solution
15. Why JavaScript?
16. JavaScript is by default an event based language. It’s support for callbacks is an excellent reason for choosing JavaScript to implement Node.js
17. __Details of implementation__ libuv
18. __Fini__