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RE: InstantDB: RE: IDB Driver problems


Hi George,

>From within my servlet, I tried this (just to see if it could find it)

//manually instantiate it (means it's in the classpath)
idbDriver driver = new idbDriver();

//instantiate via .forName() (means I can get to it from
//the servlet classloader)
try {
	Class cl = Class.forName("org.enhydra.instantdb.jdbc.idbDriver");
	Object instance = cl.newInstance();
	Debug.println (this, 0, "Got instance");
} catch (Exception e) {
	Debug.println (this, 0, "Got error:"+e);
}

Both of these worked, which makes me think there's no fundamental reason why
it _can't_ be loaded by the servlet classloader. However, Enhydra's
StandardApplication calls StandardDatabaseManager, and it looks to me like
that class is trying to load it using the system classloader.

I don't have anything more specific than that yet... (but I'm in hot pursuit
of the details ;-)

Christian

------------------------------------------------
Christian Cryder
Software Engineer, Rocks
Lutris Technologies, Inc.
christianc@lutris.com
------------------------------------------------
       "What a great time to be a Geek"
------------------------------------------------
 http://www.lutris.com ~ http://xmlc.enhydra.org


> -----Original Message-----
> From: owner-instantDB@enhydra.org [mailto:owner-instantDB@enhydra.org]On
> Behalf Of george stewart
> Sent: Friday, November 17, 2000 7:06 AM
> To: instantDB@enhydra.org
> Subject: Re: InstantDB: RE: IDB Driver problems
>
>
> Hi Christian,
> --- Christian Cryder <christian.cryder@lutris.com>
> wrote:
> >
> > In the short term, I think I can move forward by
> > just adding it to my
> > enhydra classpath, but ultimately I'd like to figure
> > out how to access from
> > the Servlet web-inf's /lib directory. I'm guessing
> > the problem is somewhere
> > either in Enhydra or Tomcat, but I'm not fully sure
> > how to proceed...
> >
>
> Probably, the driver is instantiated with
> Class.forName("driverName").  My experience is that
> this will only find classes in Tomcat's classpath.  To
> load from Tomcat's web-inf's /lib directory you must
> specify the class loader.  Please see JDBC doc on
> Class and ClassLoader.
>
> What did you use to manually instantialte the driver?
>
> Regards, goerge
>
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