I feel Java Message serices (JMS) seems more
appropriate approach to this type of system.



---Chris Emery  wrote:
>
> Hello all,
>
> I've been through many of the basic EJB
tutorials/examples listed in
> books
> or on web sites, but I'm looking for a different
type of example.  The
> ones
> I've seen all seem to touch on the same type of
subject, for example: A
> user/client accesses his/her bank account and can
add or withdraw money
> from
> it.  The EJB server authenticates the user and
updates the user's
> account as
> necessary and persists the account information in
some for, etc, etc.
>
> What I'm looking for is an example, direction, or
advice on the
> following
> type of scenario:  The server provides a stock
ticker type of service.
> The
> server is continually receiving "live" stock data
for some data feed and
> is
> storing the data in some database.  Users can
connect to the server to
> receive this live stock data.
>
> How does this type of service get implemented in an
EJB server?  I can't
> see
> the stock ticker service being a session bean since
it exists and is
> "running" even when there are no clients.  Does
than mean that it should
> be
> an entity bean?  All of the examples I've seen
describe entity beans as
> EJBs
> that represent objects that are to be persisted, so
that would seen to
> suggest that the actual stock data would be
represented by an entity
> bean,
> not the stock ticker service itself.
>
> Would the stock ticker service be a non-EJB service
that session EJBs
> accessed on behalf of the client?  Any help,
suggestions, examples would
> be
> greatly appreciated.
>
> Doug
>
>
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