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David Chandler's Journal of Java Web and Mobile Development

  • David M. Chandler


    Web app developer since 1994 and former Developer Advocate with Google now residing in Colorado. Besides tech, I enjoy landscape photography and share my work at ColoradoPhoto.gallery.

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AppEngine JDO tip regarding detachCopy()

Posted by David Chandler on November 11, 2009

In order to avoid JDO and/or serialization exceptions, I always call some form of persistenceManager.detachCopy() before returning objects from the Datastore back to GWT. I discovered today that you must set any non-persistent properties of the object after calling detachCopy(). My initial inclination is that detachCopy() does not copy properties annotated with @NotPersistent, but I have to do a little more testing…

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This entry was posted on November 11, 2009 at 11:59 pm and is filed under AppEngine, Google Web Toolkit. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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