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Editorial Team
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Asked: 2026-05-16T04:56:20+00:00

I’m writing a site on GAE-Java + Objectify which lets users create their own

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I’m writing a site on GAE-Java + Objectify which lets users create their own pages, with unique URL. I haven’t been able to figure out a clear way to ensure that when two users try to claim the same url at the same time, only one user gets it.

This is what I’m trying to avoid:

  • User 1 does a check – its available
  • User 2 does a check – its available
  • Meanwhile, User 1 creates page and stores it.
  • User 2 creates a page and overwrites User 1.

Any ideas on how to solve this on GAE?

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1 Answer

  1. Editorial Team

    Why not just run your code in a transaction? I don’t see where the issue is. Do you have a sample of something you’ve tried and had problems with?

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