Hi,
The Avalon support in Turbine appears to cause some very difficult to find
problems. In my case I have a Avalon component that uses the Quartz
scheduler. When I configure it incorrectly for datasource it fails in the
initialization of that component but does not catch the exception thrown by
the component. So you have to trace all the way down through Excalibur into
your component config and init to work out what is going on. In my case the
Quartz component is throwing an SQLException when the Quartz
PoolingConnectionProvider class calls into the commons dbcp.
public Connection getConnection() throws SQLException
{
return this.datasource.getConnection();
}
Which throws to a couple of Quartz methods until recoverjobs() throws a
JobPersistenceException which is not caught by anything and you are thrown
out completely with no idea what happened. A problem with Quartz 1.1.6 I
realize.
The point being that you are exposed to your components weaknesses. Also
because of the design of Turbine that you can end up with a double
initialization just because a component failed to init. To reproduce, you
need a component that does not catch an exception it throws during init,
then put a breakpoint on line 230 of turbine.java. Step over this line, it
will never return.
It seems that the apache CVS server does not support the -D option so I can
get the source code for commons-pool and commons-dbcp that is being used
(2003-08-25 20:45). Will have to try mocking up a use for dbcp in Turbine to
use the properties I am using for my Quartz setup.
Not sure what can be done about this fragile Avalon support?
David
> -----Original Message-----
> From: Henning Schmiedehausen [mailto:[EMAIL PROTECTED]
> Sent: 05 September 2003 16:49
> To: Turbine Users List
> Subject: RE: Torque as an Avalon Component [was: Re: Turbine Error]
>
>
> On Thu, 2003-09-04 at 21:13, David Wynter wrote:
>
> [...]
> > etc. up to 100 errors before it craps out. Just checked it again and it
> > behaves exactly the same.
> >
> > Then I had a look and found that it had copied the entire src
> tree into the
> > target tree.
>
> No. You didn't look close enough. Copying the tree from src/java to
> target/src is a necessary first step to actually compile the tree.
> Because the tree in target/src does not only contain the classes from
> src/java but also some additional files and especially the torque
> generated peers. The tree from src/java simply does not compile
> standalone as all the "I want to use a graphical IDE and not stinking
> maven" users noticed pretty fast. ;-)
>
> >From looking at the error messages, it seems to me that you did
> completely broke the build process by doing changes to the tree when you
> didn't actually understand how it is built. As it broke, you're free to
> keep both pieces. ;-)
>
> >
> > So then I pointed to the src but used the jar downloaded for JDK 1.4.2
> > (which I have switched to from 1.4.1_01 to be able to use the
> ready built
> > jar). Still no joy with my TorqueComponent.configure problem.
> Interestingly
> > I have another directory with HEAD (2.4 dev) in it and it
> builds fine on the
> > same PC.
>
> You can use the JDK 1.3 or the 1.4 jar with JSDK 1.4.1_01. It is only,
> that you should _not_ use the JDK 1.4.2 jar with JDK 1.3. I'm sorry,
> this should be more clear on the download site. I will fix this up.
>
> > Now I am the point where the Avalon components load and
> configure OK but I
> > have exactly the same problem as Jurgen, see his email and my
> last one for
> > details.
> >
> > That adds up to about 3 days work, bit at least I am closer now and know
> > more about Avalon. I am on W2K server
>
> I'm working exclusively on Linux, but actually I got a decent (> 2 GHz)
> Windows system yesterday, so I will give it a spin to see if I can
> reproduce the error. If yes, expect a patch till sunday.
>
> Regards
> Henning
>
>
> --
> Dipl.-Inf. (Univ.) Henning P. Schmiedehausen INTERMETA GmbH
> [EMAIL PROTECTED] +49 9131 50 654 0 http://www.intermeta.de/
>
> Java, perl, Solaris, Linux, xSP Consulting, Web Services
> freelance consultant -- Jakarta Turbine Development -- hero for hire
>
> "Dominate!! Dominate!! Eat your young and aggregate! I have
> grotty silicon!"
> -- AOL CD when played backwards (User Friendly - 200-10-15)
>
>
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