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EJB design: Helper class or EJB

  1. Helper class or EJB (1 messages)

    When writing a utility class to be used by EJBs, is there every any reason or advantage to make the class an EJB, rather than a standard java helper class?

    Cheers,

    Nick..

    Threaded Messages (1)

  2. Helper class or EJB[ Go to top ]

    In general I'd say no.

    Reasons for making it an EJB would include:

      - The class needs to be distributed, i.e. the operation needs to be performed in a different EJB server to that containing the client.

      - The operations on the helper class need their own transactional semantics -- for instance an operation must happen in a seperate transaction to the operation being performed by the client of the helper class.

      - The helper class contains some information from a datasource, *and* you wish to use an entity bean to manage it.

    But if in doubt, make it an ordinary class. It can always turn into an EJB behind a facade later if it needs to.

    Tom