Re: additional classpath for tomcat5x not working

> Wow.  Seems like you have done a lot of work here.  I'll paste your notes
> into the Jira.
>
> To clarify the use case, you basically want to patch a class that exists
> in
> the webapp classloader externally somehow?
>
> class A extends class B
> class A is what you want to add to the classpath
> class B is in a webapp classloader, ex. WEB-INF/lib/my.jar
>
> is that right?
>
> thanks,
> -Adrian
>
> On Mon, Feb 9, 2009 at 12:09 PM, Paul Hammes <Paul.Hammes@...> wrote:
>
> > Hi Adrian,
> >
> > I have done a lot of testing and debugging and I hope I've identified
> the
> > problem.
> >
> > As location in the configuration of cargo the path to the classes are
> > defined. This path will be set in the StandardClassLoader.
> > The class A which will be loaded per reflection can be found in the
> > specified path but extends a class B stored in a jar.
> > As defined in the policy of Java the StandardClassLoader will try to
> load
> > class A before the WebappClassLoader. The problem here is that the
> > StandardClassLoader has no information about class B.
> >
> > I tried to remove the location dependency and put the jar with class A
> to
> > WEB_INF/lib of the container and it works. But this is not a solution
> for
> > me. You can't define the project as a dependency to itself.
> >
> > A solution would be to give the paths defined as location dependencies
> to
> > the WebappClassLoader.
> >
> > Cheers
> >
> > Paul
> >
> >
> >
> > Hi, Paul.
> >
> > If you can do the following, it would help identify the problem. We
> don't
> > have an integration test for a folder element in the classpath, yet. I
> > cannot get to that today or tomorrow, but it seems worthwhile. In the
> > meantime, I can review debug for at least a second set of eyes.
> >
> > Why don't you attach your pom.xml and the output of mvn -X into the
> jira?
> >
> > On Thu, Feb 5, 2009 at 1:52 PM, Paul Hammes <Paul...@...> wrote:
> >
> > Hi Adrian,
> >
> > I moved the classes folder to ${basedir}/target/tomcat/target/main. This
> > has no effect. I also tried to specify the path absolutly but it doesn't
> > work. If the classes were packed as jar and copied to WEB-INF/lib
> everything
> > works fine. But this way of doing it is not a possible solution for me.
> >
> > Any other idea how to solve this issue?
> >
> > Cheers
> >
> > Paul
> >
> > -------- Original-Nachricht --------
> >
> > Datum: Thu, 5 Feb 2009 13:02:36 +0000 Von: Adrian Cole
> <fern...@...>
> > An: us...@... Betreff: Re: [cargo-user] additional
> > classpath for tomcat5x not working
> >
> > Thanks for trying the patch. I think there is also a relative path
> issue,
> > Paul.
> >
> > You've specifed: target/main/classes The container runs from its home:
> > ${basedir}/target/tomcat
> >
> > So, it is looking for: ${basedir}/target/tomcat/target/main/classes, if
> I'm
> > not mistaken.
> >
> > Can you check into this?
> >
> > Best of luck, -Adrian On Thu, Feb 5, 2009 at 11:08 AM, Paul Hammes <
> > Paul...@...> wrote:
> >
> > Hi Adrian,
> >
> > I have tested the artifact cargo-core-uberjar-1.0-SNAPSHOT.jar listed in
> > CARGO-TRUNKM2JDK15-265 after you have done the fix. I have the same
> problem
> > as before.
> >
> > my pom:
> >
> > <plugin> <groupId>org.codehaus.cargo</groupId>
> > <artifactId>cargo-maven2-plugin</artifactId>
> <version>1.0-beta-2</version>
> > <dependencies> <dependency> <groupId>org.codehaus.cargo</groupId>
> > <artifactId>cargo-core-uberjar</artifactId>
> <version>1.0-SNAPSHOT</version>
> > </dependency> </dependencies> ...
> >
> > What have I did wrong?
> >
> > I debugged my application and read out the classpath using
> > System.getProperty("java.class.path") and the path specified in the
> location
> > was listed in the classpath. A Class.forName(clazz) throws the
> > NoClassDefFoundException.
> >
> > Cheers
> >
> > Paul
> >
> > -------- Original-Nachricht --------
> >
> > Datum: Thu, 5 Feb 2009 10:07:07 +0000 Von: Adrian Cole
> <fern...@...>
> > An: us...@... Betreff: Re: [cargo-user] additional
> > classpath for tomcat5x not
> >
> > working
> >
> > No worries. Have a look at the jira, I believe this fix may not be
> >
> > in
> >
> > the
> >
> > beta you are using.
> >
> > Cheers, -Adrian
> >
> > On Thu, Feb 5, 2009 at 9:44 AM, Paul Hammes <Paul...@...> wrote:
> >
> > Hi Adrian,
> >
> > thanks for your fast reply. I've recorded this issue as CARGO-663.
> >
> > Cheers,
> >
> > Paul
> >
> > -------- Original-Nachricht --------
> >
> > Datum: Thu, 5 Feb 2009 09:28:27 +0000 Von: Adrian Cole
> <fern...@...>
> > An: us...@... Betreff: Re: [cargo-user] additional
> > classpath for tomcat5x not
> >
> > working
> >
> > This is a bug I ran across recently. If you don't mind, open a
> >
> > Jira
> >
> > on
> >
> > it
> >
> > and I'll fix it.
> >
> >
> http://jira.codehaus.org/secure/CreateIssue!default.jspa<http://jira.codehaus.org/secure/CreateIssue%21default.jspa>
> > <http://jira.codehaus.org/secure/CreateIssue%21default.jspa>
> >
> > <http://jira.codehaus.org/secure/CreateIssue%21default.jspa>
> >
> > <http://jira.codehaus.org/secure/CreateIssue%21default.jspa>
> >
> > Cheers, -Adrian
> >
> > On Thu, Feb 5, 2009 at 9:22 AM, Paul Hammes <Paul...@...> wrote:
> >
> > Hi all,
> >
> > we have an application which is divided into serveral projects.
> >
> > One
> >
> > project
> >
> > containing all resources for the client (js, css, ...) is
> >
> > packaged
> >
> > as a
> >
> > war
> >
> > and will be deployed to tomcat5x in another project. This
> >
> > second
> >
> > project
> >
> > can
> >
> > only be packaged as jar due to deployment issues of another
> >
> > team
> >
> > in
> >
> > our
> >
> > company. As I read in the documentation of the cargo plugin an
> >
> > additional
> >
> > classpath
> >
> > can be specified within a <location> as a dependency. This has
> >
> > no
> >
> > effect
> >
> > at
> >
> > runtime even the tomcat lists this path in the
> >
> > JspRuntimeContext
> >
> > at
> >
> > startup.
> >
> > A NoClassDefFoundError is thrown when instantiating a class out
> >
> > of
> >
> > the
> >
> > specified location. The jars listed in JspRuntimeContext are working
> > correctly. You can find my pom file below. I tried to specify the
> dependency
> > to the second project as a
> >
> > jar
> >
> > but
> >
> > this
> >
> > is a cycle dependency.
> >
> > I hope you can help me.
> >
> > Kind regards
> >
> > Paul
> >
> > <plugin> <groupId>org.codehaus.cargo</groupId>
> > <artifactId>cargo-maven2-plugin</artifactId>
> <version>1.0-beta-2</version>
> > <configuration> <configuration> <type>existing</type>
> > <home>${basedir}/target/tomcat</home> <properties>
> > <cargo.jvmargs><![CDATA[-Xdebug
> >
> > -Xrunjdwp:transport=dt_socket,address=5555,server=y,suspend=n]]>
> >
> > </cargo.jvmargs> </properties> <deployables> <deployable>
> > <artifactId>webresources</artifactId>
> <groupId>${project.groupId}</groupId>
> > <type>war</type> <properties> <context>myproject</context> </properties>
> > </deployable> </deployables> </configuration> <container>
> > <containerId>tomcat5x</containerId>
> <home>${basedir}/target/tomcat</home>
> > <dependencies> <dependency> <location>target/main/classes</location>
> > </dependency> </dependencies> </container> </configuration> </plugin>
> >
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> >
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> >
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