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I am trying to sync Google Contacts and Calendar in my proprietary application which is based on AppEngine (java).

I have heard about carddav and caldav but I am still not sure how do we sync them two way.

There are few libraries sardine but none of them talk about sync.

I am interested in knowing how well the solution scales especially as we envision that we will land up having thousands of contacts per EACH user.

Thanks.

cloudpre
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1 Answers1

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In terms of libraries, you can have a look at Calconnect list of implementations.

If you need a scalable syncing solution, you want to leverage RFC 6578 (Collection Synchronization for WebDAV).

Community
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Arnaud Quillaud
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