[opencms-dev] Challange! External Program access to OpenCMS I nstance...
ambiesense at gmx.de
ambiesense at gmx.de
Sun Nov 16 00:19:01 CET 2003
Hi Marcus,
Yes, but I would take me another week to understand EJB. I am affraid that I
do not have enough time for that. I will try the have a RMIServer running in
OpenCMS which provides interface methods for all sort of manipulation I want
to make. It should run by tomorrow.
Thank you and Gute Nacht :-),
Ralf
> Ralf,
>
> we have OpenCMS running within JBoss. This way you have the EJB
> technology running in the same VM and is really easy to access the
> already existing OpenCMS object and read eg. the user information out of
> it. The OpenCMS user can be mad serializable or you just create your own
> user object which holds the same information. This can be done in a few
> minutes.
>
> --Marcus
>
> > -----Original Message-----
> > From: opencms-dev-admin at opencms.org
> > [mailto:opencms-dev-admin at opencms.org] On Behalf Of Ralf Bierig
> > Sent: Saturday, November 15, 2003 10:47 PM
> > To: opencms-dev at opencms.org
> > Subject: Re: [opencms-dev] Challange! External Program access
> > to OpenCMS I nstance...
> >
> >
> > Yes, I actually only need to store and read user and
> > usergroup information. Sound logical...
> >
> > I have some more questions in the meantime.
> >
> > How can I insert a User in OpenCMS when I have the OpenCms
> > object. In particular, do I need the CmsObject for that ? How
> > can I create the CmsObject object from the OpenCms object?
> > Maybe you can provide some code?
> >
> > Kind Regards with new hope :-),
> > Ralf
> >
> > > What you could do is to make a server that offers commands like the
> > > CmsShell which you call over RMI and the server operates on the
> > > OpenCms.
> > >
> > > ----- Original Message -----
> > > From: "Ralf Bierig" <ambiesense at gmx.de>
> > > To: <opencms-dev at opencms.org>
> > > Sent: Saturday, November 15, 2003 10:28 PM
> > > Subject: Re: [opencms-dev] Challange! External Program access to
> > > OpenCMS I nstance...
> > >
> > >
> > > > Hi Stephan,
> > > >
> > > > yes, I got a NotSerializableException. It seems that I cannot use
> > > > RMI interface to connect to OpenCMS. It seems that OpenCMS is not
> > > > made for
> > > any
> > > other
> > > > access then web.
> > > >
> > > > It is quite disappointing...
> > > >
> > > > Ralf
> > > >
> > > > > Hi Ralf,
> > > > >
> > > > > it won't help to mark the OpenCms class as serializable. All
> > > > > members
> > > of
> > > > > OpenCms and the members' members have to be
> > serializable as well
> > > > > (or transient, but thats surely not what you want).
> > > > >
> > > > > Bye,
> > > > > Stephan
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Ralf Bierig" <ambiesense at gmx.de>
> > > > > To: <opencms-dev at opencms.org>
> > > > > Sent: Saturday, November 15, 2003 9:43 PM
> > > > > Subject: RE: [opencms-dev] Challange! External Program access to
> > > OpenCMS
> > > I
> > > > > nstance...
> > > > >
> > > > >
> > > > > > Hello,
> > > > > >
> > > > > > I followed your tip and programmed a RMI Server, which is
> > > > > > initiateed
> > > by
> > > > > the
> > > > > > OpenCmsHTTPServlet class when the opencms servlet it
> > called. The
> > > server
> > > > > is
> > > > > > up
> > > > > > and running.
> > > > > >
> > > > > > However when I access the server and want to get the OpenCms
> > > > > > object
> > > I
> > > > > get
> > > > > > the following message:
> > > > > >
> > > > > > System RemoteExceptionjava.rmi.UnmarshalException: error
> > > unmarshalling
> > > > > > return; nested exception is:
> > > > > > java.io.WriteAbortedException: writing aborted;
> > > > > > java.io.NotSerializableException: com.opencms.core.OpenCms
> > > > > >
> > > > > > The OpenCms object does indeed not implement the Serializable
> > > interface.
> > > > > My
> > > > > > question now is, when I modify the OpenCms class file and add
> > > > > > that
> > > it
> > > > > > implements Serializable will it work then and will it work
> > > > > > properly?
> > > > > >
> > > > > > Is the problem another one and how can I fix it. I am soooo
> > > > > > close
> > > and
> > > > > there
> > > > > > should be a way...
> > > > > >
> > > > > >
> > > > > > Cheers,
> > > > > > Ralf
> > > > > >
> > > > > > > You will need RMI to call the wrapper class if you start
> > > > > > > another application with "java myApplication"
> > because then you
> > > > > > > start a new JVM,
> > > different
> > > > > than
> > > > > > > the JVM which is started by your web application
> > and in which
> > > > > > > your
> > > > > wrapper
> > > > > > > class was initialized.
> > > > > > > w
> > > > > > >
> > > > > > > -----Original Message-----
> > > > > > > From: ambiesense at gmx.de [mailto:ambiesense at gmx.de]
> > > > > > > Sent: mercredi 12 novembre 2003 14:32
> > > > > > > To: opencms-dev at opencms.org
> > > > > > > Subject: RE: [opencms-dev] Challange! External
> > Program access
> > > > > > > to
> > > > > OpenCMS
> > > > > > > I nstance...
> > > > > > >
> > > > > > >
> > > > > > > Hello Wouter,
> > > > > > >
> > > > > > > can another Java program (started indepentendly with "java
> > > > > myApplication")
> > > > > > > call the static Wrapper embedded as part of the OpenCMS
> > > > > > > server? If
> > > > > this
> > > > > is
> > > > > > > possible, then I am fine.
> > > > > > >
> > > > > > > I think this is more a Java question then a OpenCMS
> > question.
> > > > > > > I
> > > > > appologise
> > > > > > > if I might have confused you.
> > > > > > >
> > > > > > > Ralf
> > > > > > >
> > > > > > > > I don't understand exactly what you are trying to
> > say. Why
> > > > > > > > don't
> > > you
> > > > > > > > consider the Wrapper class as being part of the OpenCms
> > > > > > > > server ?
> > > > > It's
> > > > > > > > the
> > > > > > > > client which afterwards calls the wrapper class
> > in order to
> > > > > > > > get
> > > > > acces
> > > > > > > > to the
> > > > > > > > singleton OpenCms.
> > > > > > > >
> > > > > > > > Concerning the other question , as long you keep the
> > > > > > > > singleton
> > > > > "single"
> > > > > > > > there no problem that different threads or
> > clients (possibly
> > > through
> > > > > > > > rmi)
> > > > > > > > make use of the singleton. They all use a
> > reference to the
> > > > > > > > same
> > > > > object.
> > > > > > > >
> > > > > > > > wouter
> > > > > > > >
> > > > > > > > -----Original Message-----
> > > > > > > > From: Ralf Bierig [mailto:ambiesense at gmx.de]
> > > > > > > > Sent: mercredi 12 novembre 2003 11:22
> > > > > > > > To: opencms-dev at opencms.org
> > > > > > > > Subject: Re: [opencms-dev] Challange! External Program
> > > > > > > > access to OpenCMS Instance...
> > > > > > > >
> > > > > > > >
> > > > > > > > Hi Matt and Wouter,
> > > > > > > >
> > > > > > > > the method is more direct. However using this
> > appraoch would
> > > change
> > > > > the
> > > > > > > > workflow. My initial idea was that OpenCMS with data and
> > > everything
> > > > > is
> > > > > > > > like
> > > > > > > > a
> > > > > > > > service and I have a client, who can access this without
> > > > > > > > HTTP/SOAP/Webservice but API(local)/RMI or Sockets.
> > > > > > > >
> > > > > > > > Wouter's method is good but change the workflow
> > in the way
> > > > > > > > that
> > > the
> > > > > > > > OpenCMS
> > > > > > > > server is acutally calling my application (the wrapper).
> > > > > > > > This
> > > would
> > > > > > > > turn
> > > > > > > > OpenCMS into a pseudo client and the application which was
> > > supposed
> > > > > to
> > > > > > > > be a
> > > > > > > > client into a pseudo server. The application would be
> > > > > > > > invoked by starting OpenCMS.
> > > > > > > > I would like it however the other way round. Would this be
> > > possible
> > > > > to
> > > > > > > > start
> > > > > > > > a RMI server/Socket Server with this extra line
> > and let the
> > > > > appliation
> > > > > > > > client connect to that, get the OpenCms Object
> > and work with
> > > > > > > > the singleton OpenCms
> > > > > > > > instance.
> > > > > > > >
> > > > > > > > If more then one client applications would connect like
> > > > > > > > that,
> > > would
> > > > > > > > this way
> > > > > > > > of accessing still ensure that each client sees the same
> > > > > > > > (files,
> > > > > users,
> > > > > > > > etc)?
> > > > > > > >
> > > > > > > > Another question based on the fact that I would
> > accept the
> > > > > > > > fact
> > > that
> > > > > > > > OpenCMS
> > > > > > > > starts the application. Could this line:
> > > > > > > >
> > > > > > > > // added by myself
> > > > > > > > opencms.addons.CmsWrapper.setOpenCms(m_opencms);
> > > > > > > > // end added by myself
> > > > > > > >
> > > > > > > > be extended to start a number of appliations (Wrappers)
> > > > > simultaniously
> > > > > > > > (i.e.
> > > > > > > > as Threads). Would this still ensure that each
> > application
> > > > > > > > would
> > > see
> > > > > > > > the
> > > > > > > > same OpenCMS instance with the same changes made
> > by others
> > > > > > > > (i.e.
> > > > > users,
> > > > > > > > files,
> > > > > > > > tasks...)?
> > > > > > > >
> > > > > > > > Cheers,
> > > > > > > > Ralf
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > > > Ralf Bierig wrote:
> > > > > > > > > > Hello Matt,
> > > > > > > > > >
> > > > > > > > > > thank you again for you competent answer.
> > > > > > > > > >
> > > > > > > > > > Do you agree that this solution should not have side
> > > effects,
> > > if
> > > > > > > > the
> > > > > > > > > only
> > > > > > > > > > user would be this Java programm and there would NO
> > > > > > > > > > OTHER
> > > user
> > > > > > > > logged in
> > > > > > > > > via
> > > > > > > > > > HTTP/Tomcat?
> > > > > > > > >
> > > > > > > > > I think that should be okay. wouter's method is probably
> > > better,
> > > > > > > > though
> > > > > > > > > -- esp. if you were planning on using RMI anyway.
> > > > > > > > >
> > > > > > > > > Matt
> > > > > > > > >
> > > > > > > > > _______________________________________________
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