Realtime Blocky

[David Daza]

Hi,

I'm thinking about implement a feature to a Blockly app I'm doing. The idea is to have a realtime collaborative workspace, like google docs but with Blocky.

Since the server is running on Nodejs I'm planning to do this using socket.io package by saving the xml of the blocks, broadcast it, and reconstructing the blocks. That's my initial idea.

What do you guys think? Should I use another technology besides web sockets?

Thank you so much in advance

[Rachel Fenichel]

Here's a doc that Neil put together with a plan for realtime collaboration: https://docs.google.com/document/d/1KyF6X7yrc3phPqLGzpPdngLMMzZ0jvXOFK5W43IAwbY/edit

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[David Daza]

Well, I'm actually doing some advances, you can check it here, by now, the app it's only working in one direction, pretty weird, but I'm going to try to send the xml in another format, following the advises within the Neil's document you attached. Thank you so much, you're welcome to collaborate and of course I'll post any advance I make

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David E. Daza Lacera

Docente en formación

Licenciatura en Electrónica

Universidad Pedagógica Nacional

[David Daza]

Well, we got a nice first approach :D. You can take a look here

[Carlos Galarza]

It is a good approach, it can be improved using the Blockly event system sending fine grained events over the socket for improving performance.

[Evan Patton]

The Blockly event system definitely helps. At MIT App Inventor we've been working on real-time collaboration, and sending the JSON-serialized blocks via socket.io is pretty straightforward. The challenge is more correctly implementing the operational transforms so that once you have more than a couple users that the blocks don't randomly disappear out from under you. Good luck!

Evan

[David Daza]

Thank you so much Evan, we're going to really take into account your feedback! :D

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[Matthew Bishop]

Rachel, I'm interested in the state of realtime Blockly across multiple clients. Has this seen any work in the last couple of years?