David Chandler's Journal of Java Web and Mobile Development

  • David M. Chandler

    Web app developer since 1994 and Google Cloud Platform Instructor now residing in Colorado. Besides tech, I enjoy landscape photography and share my work at ColoradoPhoto.gallery.

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gwt-dispatch and com.google.gwt.user.client.rpc.SerializationException

Posted by David Chandler on October 2, 2009

I’d written a new gwt-dispatch ActionHandler with corresponding Action and Result classes and was getting the above exception. The cause turned out be very simple: Action and Result classes implement java.io.Serializable and GWT-RPC therefore requires that they have an empty constructor. So when you get the yellow squiggly in Eclipse that prompts you to generate a serial ID, add an empty constructor, too, and save yourself some grief.

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