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# Technical Challenges

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The key technical challenge in this architecture lies in integrating components into a cohesive system. For example, this architecture requires a specific TopLink integration with the application server or J2EE container.

Other issues include the following:

- External JDBC Pools

- JTA/JTS Integration

- Cache Coordination

- Maintaining Bidirectional Relationships

- Managing Dependent Objects

- Managing Collections of EJBObject Objects