can a session bean return a local entity bean object?

[David Thielen]

Hi;

If in a session bean (which is accessed remotely), can it return a
entity bean object (which is accessed locally) to the remote caller? I
know that changes to the entity bean object returned would not be
written to the database. But I just need a read/only copy of the data.

thanks - dave



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[Bryce (Work)]

Hi;

If in a session bean (which is accessed remotely), can it return a
entity bean object (which is accessed locally) to the remote caller? I
know that changes to the entity bean object returned would not be
written to the database. But I just need a read/only copy of the data.

Use Value objects pattern.
http://java.sun.com/blueprints/corej2eepatterns/Patterns/TransferObject.html

Hides the implementation of your entity beans from the non-local
clients. Basically, just create a bean with the fields you need. I
usually have no setters, just getters.

 

[Marek Lange]

Hi;

If in a session bean (which is accessed remotely), can it return a
entity bean object (which is accessed locally) to the remote caller? I
know that changes to the entity bean object returned would not be
written to the database. But I just need a read/only copy of the data.

A local interface is designed for in-VM use only. You have to use an
object which is serializable for the transport to the caller (--> value
objects).

-marek