Bean-managed persistence is a technique in Java enterprise systems where the developer has to explicitly write the persistence logic in the Bean class. It provides more flexibility in managing the state between the bean instance and the database. Entity beans defined by complex joins, a combination of different databases, or other resources such as legacy systems benefit from bean-managed persistence.
The process of writing persistence code in the Bean class may seem complicated since the developer needs to have knowledge of which database type is used and how the bean class fields map to that database. However, this technique offers a more customized solution when the deployment tools are insufficient for mapping bean instance state to the database.
In contrast, container-managed persistence is an automated technique where the persistence code is generated automatically by the deployment tools. It is ideal for simpler configurations where the database structure is straightforward.
Overall, bean-managed persistence is suitable for developers seeking more control over the persistence logic and its implementation while sacrificing simplicity. On the other hand, container-managed persistence is ideal for simple applications with straightforward database structures.
FAQs
What is the benefit of using bean-managed persistence?
Bean-managed persistence offers more flexibility in managing the state between the bean instance and the database. It is suitable for complex database configurations where container-managed persistence may not be sufficient.
What are the disadvantages of using bean-managed persistence?
The disadvantage of using bean-managed persistence is that it requires more work to define the bean. You need to have knowledge of the database structure and develop the necessary logic to create, update, and remove data associated with an entity.
Which persistence technique is better, bean-managed or container-managed persistence?
It depends on the complexity of the application’s database structure. Bean-managed persistence is suitable for complex configurations while container-managed persistence is ideal for simpler configurations.
Conclusion
Bean-managed persistence is a technique that provides more control over the persistence logic implementation but sacrifices simplicity. It is suitable for complex database configurations that require more flexibility than what container-managed persistence can offer. However, it requires more work to define the bean.
