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Managing Multiple Parent Persistence Problem in App Engine

We are in process of porting an entire application on google app engine. This application has persistence using JPA and as usual contains mapping between entities using annotations. The mapping like...

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Generating Charts In Wicket Application On Google App Engine

We are in process of porting an existing Wicket application on Google App engine. This application’s charting engine used Java color classes along with Swing components to generate dynamic images....

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Problems When Deploying Working Application on Google App Engine

Google Dev and production environment has differences. You may run into problems if you expect that application will also run fine on app engine if there are no errors on app engine development server....

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Improve Performance By Using Keys Only Query on Google App Engine

It has been around two months since we started to port an existing application on Google App engine. It used Hibernate for persistence, Wicket framework for web layer and Spring as an Ioc container....

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Implementing Multi-tenancy On Google App Engine

Google recently added support for multi-tenancy for applications via the Namespaces API. We are in process of porting an application to Google App engine. We were thinking of making our application...

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GAE Problems: Slim3 To The Rescue?

For the past few months we have been working on porting a time-sheet application on Google App Engine. The application we were trying to port had Spring for Dependency Injection, Hibernate for...

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Configuring Spring Application Using Configuration Annotation

A Spring Module called Java Config has been there for some time now. With the release of Spring 3.0 SpringSource has pulled this module into the core Spring Framework as @Configuration. How can we use...

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Working With Spring Data JPA

SpringSource have recently released the first milestone of Spring Data JPA project. What are its features? and how can we use them. Spring framework already provides support to build a JPA based data...

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