What are the technologies employed in building Google Wave?
Edit: I have moved and amalgamated the answers into an answer below, rather than here in the question where they were.
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- Real-time editing - some kind of Ajax/Comet for server side calls.
- Version-control.
- Built in Google Web Toolkit (GWT).
- GWT involves Java, Javascript, CSS, HTML.
- Custom built protocol. Wave protocol.
- Uses the xmmp standard
- Rich text-editor.
- Language translation.
- Google Gears, for drag and drop (of files) functionality. Trying to get it into the HTML5 spec.
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It's using HTML5 for the interface and XMPP (Jabber's protocol) for the communication stuff.
ArcaTech
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The revolutionary part is Operational Transform. Based on the Jupiter collaborative system.
You may like to watch this video: Google I/O 2009 - Google Wave Under the hood
Daniel Paull
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I believe Google Wave is built on HTML5.
Nathaniel Flath
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Which HTML5 technologies? - Offline storage. - Geolocation? - Canvas? - Multithreading/processes? – Laz May 30 '09 at 02:05
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(One) better question may be: what technologies does the new version of GWT use/require. It looks like the demo runs on Chrome, Safari 4, and Firefox 3.5(?) so perhaps HTML 5 and canvas are baseline requirements. Will IE 8 work? – Jared Updike Jul 19 '09 at 20:53
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I understand that they use an Extension to the Jabber protocol for the federated wave servers.
The realtime editing is based on an algorithm sometimes called jupiter algorithm and described in this paper. More informations can be found on http://www.waveprotocol.org/whitepapers
Janusz
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