Re: Updating DataMap through ROP client

From: Andrey Razumovsky (razumovsky.andre..mail.com)
Date: Tue Feb 17 2009 - 12:20:40 EST

  • Next message: Zissis Trabaris: "RE: Updating DataMap through ROP client"

    The most common case to fetch Configuration instance in server is via
    Configuration.getSharedConfiguration(). But I still don't understand why you
    don't want to apply all changes on server side. This way, in theory, no
    reloading will be required on server (except cache cleaning).

    2009/2/17 Zissis Trabaris <z.trabari..nsysware.com>

    > I can clear the EntityResolver on the client side but since I don't know
    > how to get to the Configuration instance on the server side I can't
    > re-load the maps. Without re-loading the maps on the server side, I will
    > always get an entity not found exception when I try to use a newly added
    > ObjEntity.
    >
    > Zissis Trabaris * Chief Technology Officer * INSYSWARE * 3235 West River
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    > -----Original Message-----
    > From: Andrey Razumovsky [mailto:razumovsky.andre..mail.com]
    > Sent: Monday, February 16, 2009 3:15 PM
    > To: use..ayenne.apache.org
    > Subject: Re: Updating DataMap through ROP client
    >
    > I don't know details of Hessian, but I don't think HessianServlet caches
    > any
    > data. Have you tried simply clearing client context's cache?
    >
    > 2009/2/16 Zissis Trabaris <z.trabari..nsysware.com>
    >
    > > I have solved the DataMap problem with the following: I have created
    > an
    > > HTTP back-channel that send the map xmls to the client. The client
    > then
    > > creates a new Configuration instance, modifies the data maps,
    > serializes
    > > the results to XML, sends them to the server and the server saves them
    > > to disk. The remaining problems to solve are the following:
    > >
    > > 1) I need to somehow refresh the configuration instances that are in
    > > memory for the HessianServlet.
    > > 2) Once refreshed, I need to somehow clear the object caches of the
    > > HessianServlet.
    > >
    > > All of this without dropping any connections that the HessianServlet
    > is
    > > servicing.
    > >
    > > Zissis Trabaris * Chief Technology Officer * INSYSWARE * 3235 West
    > River
    > > Road, Grand Island, New York, 14072, USA
    > > Mobile (716) 930-5654 * Office (518) 636-4118 * Fax (716) 625-1305 *
    > > z.trabari..nsysware.com * www.insysware.com
    > >
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    > >
    > >
    > > -----Original Message-----
    > > From: Andrey Razumovsky [mailto:razumovsky.andre..mail.com]
    > > Sent: Sunday, February 15, 2009 1:10 PM
    > > To: use..ayenne.apache.org
    > > Subject: Re: Updating DataMap through ROP client
    > >
    > > Hi Zissis,
    > >
    > > DbEntities are not being sent to client (and DataMap is sent trimmed).
    > > So I
    > > don't think you can perform DataMap changes from client. What I would
    > > try to
    > > do is to write a custom query which performs your operations and the
    > > fire it
    > > from the client. I'm not sure this will work though.
    > >
    > > Regards,
    > > Andrey
    > >
    > > 2009/2/15 Zissis Trabaris <z.trabari..nsysware.com>
    > >
    > > > We have an ROP client that acts as a modeler for our runtime
    > > > application. Is there any way to modify a DataMap via an ROP client
    > > > layer, synchronize the DB schema like I would do using
    > > > ExecutingMergerContext at the server layer and then clear the server
    > > and
    > > > client object caches without dropping the ROP connection?
    > > >
    > > >
    > > >
    > > > Zissis Trabaris * Chief Technology Officer * INSYSWARE * 3235 West
    > > River
    > > > Road, Grand Island, New York, 14072, USA
    > > > Mobile (716) 930-5654 * Office (518) 636-4118 * Fax (716) 625-1305 *
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