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From Mark Struberg <strub...@yahoo.de>
Subject Re: Classpath Scanner proposal
Date Sun, 27 Feb 2011 18:34:42 GMT
I think it should be enough if the classscanner implementation itself shades any such 3rd party
jar into a inner dependency.
My main focus currently is to design the API flexible enough to allow all necessary use cases
to work.

LieGrue,
strub

--- On Sun, 2/27/11, Jan-Kees van Andel <jankeesvanandel@gmail.com> wrote:

> From: Jan-Kees van Andel <jankeesvanandel@gmail.com>
> Subject: Re: Classpath Scanner proposal
> To: dev@openwebbeans.apache.org, dev@geronimo.apache.org
> Date: Sunday, February 27, 2011, 1:35 PM
> +1, although I think Jar hell is a
> real issue. Think about libraries like
> cglib, asm or commons-*** and the pain they sometimes
> cause.
> 
> But we can easily work around it, for example by packaging
> all
> using-frameworks as uber-jars and renaming
> the "org.apache.commons.classscan" packages to something
> like "org.apache.myfaces.org.apache.commons.classscan"
> and "org.apache.webbeans.org.apache.commons.classscan".
> This way we prevent
> any future versioning issues that libraries like cglib and
> asm currently
> have.
> 
> Regards,
> Jan-Kees
> 
> 
> 2011/2/27 Mark Struberg <struberg@yahoo.de>
> 
> > Hi Jan-Kees!
> >
> > Txs for this info!
> >
> > Of course, I think the downside of getting another
> dependency to myfaces
> > would highly be outvalued by the benefit we'd gain
> from it :)
> >
> > LieGrue,
> > strub
> >
> > --- On Sun, 2/27/11, Jan-Kees van Andel <jankeesvanandel@gmail.com>
> wrote:
> >
> > > From: Jan-Kees van Andel <jankeesvanandel@gmail.com>
> > > Subject: Re: Classpath Scanner proposal
> > > To: dev@openwebbeans.apache.org,
> dev@geronimo.apache.org,
> "Mark
> > Struberg" <struberg@yahoo.de>
> > > Date: Sunday, February 27, 2011, 12:58 PM
> > > Hey Mark,
> > >
> > > About the JSR proposal. I've actually been
> talking to some
> > > Oracle folks
> > > about this idea some (like 3?) years ago. They
> didn't
> > > really like it, since
> > > the classpath is only a VM implementation
> detail.
> > > I proposed it, because back then there were
> already rumours
> > > about module
> > > systems and writing a mechanism that relies on
> the
> > > classpath seemed like a
> > > bad idea at that time. A JSR (like 277 back then)
> could
> > > keep annotation
> > > scanning in mind while writing the spec.
> > > I pinged them again (I think it was last year)
> and they
> > > responded that they
> > > would think about adding an annotation scanner to
> Jigsaw,
> > > but a JSR was out
> > > of the question.
> > >
> > > I think mentioning their names here is
> inappropriate, but
> > > they're influential people in the Java/JCP
> world...
> > >
> > > This is not a reason to not write a framework or
> to not
> > > submit a JSR, but I
> > > thought I'd mention it...
> > >
> > > Ps. Maybe it's a good idea to "promote" XBean
> Finder and
> > > use it in
> > > MyFaces/OWB/etc...?
> > > Ps2. IIRC, we implemented our own scanner for
> MyFaces, for
> > > the simple reason
> > > that it removes an additional dependency. But,
> OTOH, using
> > > XBean Finder with
> > > the Maven Shade Plugin would also work...
> > >
> > > Regards,
> > > Jan-Kees
> > >
> > >
> > > 2011/2/27 Mark Struberg <struberg@yahoo.de>
> > >
> > > > Hi Ivan!
> > > >
> > > > Yes, I already prepared for the addition of
> a
> > > xbean-finder based
> > > > ClassScanner implementation. But since I
> didn't reach
> > > David yesterday and I
> > > > personally don't know xbean-finder well
> enough, I just
> > > started hacking on a
> > > > scannotation based one (similar to the one
> we use in
> > > OpenWebBeans).
> > > >
> > > >
> > > > LieGrue,
> > > > strub
> > > >
> > > > --- On Sun, 2/27/11, Ivan <xhhsld@gmail.com>
> > > wrote:
> > > >
> > > > > From: Ivan <xhhsld@gmail.com>
> > > > > Subject: Re: Classpath Scanner
> proposal
> > > > > To: dev@openwebbeans.apache.org,
> > > dev@geronimo.apache.org
> > > > > Date: Sunday, February 27, 2011, 12:01
> PM
> > > > > Totally agree the idea, in Geronimo,
> > > > > it is definitely an issue, as many
> > > > > components need to scan the target
> application,
> > > and we are
> > > > > trying to improve
> > > > > this, e,g. In the xbean-finder, we use
> some
> > > filter to limit
> > > > > the scanning
> > > > > scope. Also, we hope to have a
> sharable
> > > annotation scanning
> > > > > tool, and open a
> > > > > JIRA to track this.
> > > > >
> > > > > [1] https://issues.apache.org/jira/browse/GERONIMO-5644
> > > > > [2]
> > > > >
> > > >
> > https://svn.apache.org/repos/asf/geronimo/xbean/trunk/xbean-bundleutils/src/main/java/org/apache/xbean/osgi/bundle/util/ResourceDiscoveryFilter.java
> > > > >
> > > > > 2011/2/27 Mark Struberg <struberg@yahoo.de>
> > > > >
> > > > > > hi folks!
> > > > > >
> > > > > > Since I'm tired of waiting for my
> EE stack
> > > to startup
> > > > > because each and
> > > > > > every library implements it's own
> classpath
> > > scanner
> > > > > over and over again, I
> > > > > > thought about introducing a
> proposal for a
> > > framework
> > > > > which allows to first
> > > > > > register 'ScanJobs' and then just
> does all
> > > the
> > > > > necessary classpath scanning
> > > > > > only once.
> > > > > >
> > > > > > If it turns out to work well, then
> I even
> > > consider
> > > > > this to get submitted as
> > > > > > JSR...
> > > > > >
> > > > > > But before this point gets
> reached, a lot of
> > > work is
> > > > > still waiting.
> > > > > >
> > > > > > I hope a few people are interested
> in this
> > > work and
> > > > > help me
> > > > > > specifying/testing the needs!
> > > > > >
> > > > > > The api and a bit of docs can be
> found at my
> > > github
> > > > > repo [1][2].
> > > > > >
> > > > > > I'm currently working on
> 'scannizing'
> > > OpenWebBeans
> > > > > (and later MyFaces) as a
> > > > > > real world example.
> > > > > >
> > > > > > LieGrue,
> > > > > > strub
> > > > > >
> > > > > > [1] https://github.com/struberg/Apache-commons-classscanner/
> > > > > > [2]
> > > > > >
> > > >
> > https://github.com/struberg/Apache-commons-classscanner/wiki/Apache-Commons-ClassScan-proposal
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > > --
> > > > > Ivan
> > > > >
> > > >
> > > >
> > > >
> > > >
> > >
> >
> >
> >
> >
> 


      

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