[Mulgara-general] Not yet for newbie

[Paul Gearon]

As David says, you really don't want to put kowari-1.2.0.jar into your lib
directory.  This is the jar for the server!  You want the client jar:
itql-1.2.0.jar.  This contains everything a client needs, and is 2.1MB in
size.

As for using ItqlInterpreterBean, this is reasonably simple.  Look at the
old Kowari docs for some sample code.  The page you want is at "System
Architecture | iTQL Bean":
http://www.kowari.org/oldsite/528.htm

>From memory, the executeQuery() method can throw a QueryException, and the
Answer.next() method can throw a TuplesException.  There may be other
exceptions, but these are the main ones to catch (the example page just
catches all Exception objects indiscriminately).

Paul

On 11/20/06, David Wood <dwood at softwarememetics.com> wrote:
>
> Also, you *really* don't want to put kowari-1.2.jar in your lib
> directory!  Your code will find the classes, but not the running instance.
> Regards,
> Dave
>
>
> On 20 Nov2006, at 16:10, Paul Gearon wrote:
>
> I am concerned at your use of JRDF to access Kowari.  There was a hack in
> JRDF which violated the ACID requirements on the database.  That probably
> won't affect a single-user system, but it can lead to problems.
>
> Since you're already using ItqlInterpreterBean, is there any reason you
> can't use iTQL?  This interface is correctly supported.
>
> Paul
>
> On 11/20/06, Guojun Zhu <shmilylemon at yahoo.com> wrote:
> >
> > Dear Paul,
> >
> > Thanks for your message. Actually that is exactly what
> > I did.  I wrote a java class to access the
> > kowari-store, then call this class from jsp.  I first
> > use the topelo2, then I try to use jrdf.  None of them
> > work.  Firstly, the tomcat5.5 cannot find the
> > itqlinterpreterbean class once I deploy although I
> > have put the kowari-1.2.0.jar in the WEB-INF/lib.
> > Then I pu t the kowari-1.2.0.jar to the common/lib and
> > it works but I cannot establish the connection with
> > rmi.  On the other linux server, it does work for a
> > while but then stop to work for some reasons.
> >
> > The major problem is that part of the projects has
> > already finished with tupelo2 and kowari1.2 by someone
> > else.   Mine actually is just a minor part.
> >
> > Sincerely
> > Zhu, Guojun
> >
> > --- Paul Gearon <gearon at ieee.org> wrote:
> >
> > > Hi Guojun,
> > >
> > > On 11/20/06, David Wood < dwood at softwarememetics.com>
> > > wrote:
> > > >
> > > > Hi Guojin,
> > > >
> > > > Thanks for your description of our documentation
> > > problems.  We can
> > > > use your mail to address the documentation before
> > > the next Mulgara
> > > > release.
> > > >
> > > > It is unfortunate that you are trying to use the
> > > JSP library with
> > > > Mulgara.  I do not believe that the JSP library
> > > has been touched in
> > > > years and it is only tested via the unit tests.
> > > You are therefore
> > > > probably right about Java 1.5. classes causing
> > > problems with it.
> > > >
> > >
> > >
> > > I notice that you talk about using Kowari-1.2, and
> > > NOT Mulgara.  The JSP
> > > code did once work in Kowari (I have no idea of it's
> > > state now), but Kowari
> > > is not compatible with Java 1.5.  This will almost
> > > certainly cause problems
> > > for you if you run Kowari with Java 1.5 (the server
> > > will run, but the
> > > libraries used by JSPs have changed from Java 1.4 to
> > > 1.5, so this
> > > functionality may have problems.
> > >
> > > Mulgara is compatible with Java 1.5, but we have not
> > > looked at the JSP code
> > > at all.
> > >
> > > A workaround to any problems with the JSP tags would
> > > be to create a
> > > connection directly, using Java code in the JSP
> > > file.  This is not clean
> > > JSP, but can get the job done if needed.
> > >
> > > Regards,
> > > Paul
> > >
> >
> >
> >
> >
> >
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