Re: Sandbox and multi Tier Qs

From: Andrus Adamchik (andru..bjectstyle.org)
Date: Tue May 17 2005 - 22:07:03 EDT

  • Next message: Derek Rendall: "Re: Sandbox and multi Tier Qs"

    Hmm, wouldn't a remote method call on the pier object solve this
    requirement?

    E.g.

    ClientUser {
       public Object doComplexOperation() {
           return callPeer("doComplexOperation");
       }
    }

    ServerUser {
       public Object doComplexOperation() {
           // ... actually do it
       }
    }

    Andrus

    On May 17, 2005, at 10:01 PM, Derek Rendall wrote:

    > On 5/18/05, Andrus Adamchik <andru..bjectstyle.org> wrote:
    >>
    >> On May 17, 2005, at 9:33 PM, Andrus Adamchik wrote:
    >>>> What about the ability to support other server side logic (say some
    >>>> ejb's, SOA based components or just some "sensitive" stuff that
    >>>> should NEVER be passed to client to look after)?
    >>>
    >>> We are not in business of replacing web services, RMI and such,
    >>> however I am planning to add support for executing server-side
    >>> business methods from the client "peer" objects.
    >>
    >> Derek,
    >>
    >> Do you have something specific in mind here?
    >>
    >> Theoretically you can feed data from any type of data services to
    >> Cayenne client. But if such data service has no predefined query
    >> language and update mechanism, using Cayenne would probably buy you
    >> nothing compared to say web service stubs compiled from WSDL. Or am I
    >> wrong?
    >>
    >
    > Ahhh - specifics :-)
    >
    > OK. We have a couple of web based apps (one WebObjects and one
    > WebSphere). The users are complaining about standard html as an
    > interface - "rich GUIs" are becoming a requirement (they are also
    > complaining about the WO scalability/performance in some cases). So,
    > enter in Eclipse RCP - looks great. Now, we want to use an ORM for our
    > data layer, and make sure that clients DONT have direct connections to
    > the database (enter in Cayenne 3T). We also have cases where we want
    > some of our complex logix to sit on the servers and be called from the
    > clients. One reason is data set size - we dont want large sets of data
    > transported down to the client if we can get a nice big fat server to
    > process it (pass some data in from the client, and the resulting
    > action requires significant resources to complete). At the moment this
    > could be logic sitting inside a webserver session, a call through to
    > an EJB (would use the EJB thread to pass in datacontext?) or possibly
    > a webservice. I know we could call these directly from the client, but
    > I would prefer to use the datacontext that already exists on the
    > server side in thos cases where I can.
    >
    > Make sense?
    >



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