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Spring Roo 1.1 Cookbook by Ashish Sarin

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Deploying a Spring Web MVC application on GAE

As of Spring Roo 1.1.5, the Roo-generated Spring Web MVC application doesn't work on GAE. The reason for this is related to mismatch in the JSTL version used by GAE and by the Roo-generated Spring MVC application. Also, Roo-generated JPA entities support only unowned relationships (refer http://code.google.com/appengine/docs/java/datastore/jdo/relationships.html to learn about owned and unowned relationships). In this recipe, we'll look at a Spring 3.0 Web MVC application (which uses JSTL tags that work on GAE) consisting of FlightDescription and Flight JPA entities and demonstrates how to create a unidirectional owned one-to-many relationship between JPA entities. The FlightDescription entity is on ...

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