Message driven beans and object binding

Question

          I want to write a message driven bean, and use javax.naming.Context's "bind(String,
          Object)" method to bind the data to a key and eventually do a unbind(String) to
          look up the data . Is binding/unbinding of object is allowed inside a message
          driven bean or this violates the EJB2.0 spec? Also, does this have any negative
          consequences if I use a Weblogic cluster as opposed to a single instance? Any
          suggestions
          

Answer 1

Hi Austin,
          - I don't know if it is "legal" in EJB 2.0
          to call bind/unbind within an MDB. I
          would assume so, but I'm not sure. You can try confirming with
          the jndi and ejb newsgroups. Of course, if you don't
          ask, then no one can tell you "no". ;-)
          - Bind/unbind is a relatively expensive call performance-wise. I
          suspect one might want to avoid doing too many of these per
          second (the jndi newsgroup may be able to give pointers here.)
          - Servers in a cluster do not instantly propagate bind/unbind info
          to other servers in cluster, and JNDI may have trouble
          efficiently supporting larger objects: both potential drawbacks
          to using JNDI for data caching purposes.
          Tom, BEA
          Austin P wrote:
          > I want to write a message driven bean, and use javax.naming.Context's "bind(String,
          > Object)" method to bind the data to a key and eventually do a unbind(String) to
          > look up the data . Is binding/unbinding of object is allowed inside a message
          > driven bean or this violates the EJB2.0 spec? Also, does this have any negative
          > consequences if I use a Weblogic cluster as opposed to a single instance? Any
          > suggestions