Thanks Robert. In the end I found another way to do what I needed which did not involve Maven exec, but will keep that in mind as I should in the first place. :-)
After all, when to use debug flags if not when debugging... :D pozdrawiam, Tomasz Borek 2012/9/10 Robert Scholte <rfscho...@codehaus.org> > Try to run Maven with the logginglevel on debug, so: mvn -X test > This will show you the commandline being executed, which should give you a > hint what's going wrong. > > Robert > > ------------------------------ > From: tomasz.bo...@gmail.com > Date: Mon, 10 Sep 2012 14:31:25 +0200 > To: user@mojo.codehaus.org > Subject: [mojo-user] Re: Classloader problem with main class > > > Hi again, > > I found few promising links, with issues. There seems to be some > classloader / config related problem resulting in that exception. > > http://jira.codehaus.org/browse/MNG-3888 > http://jira.codehaus.org/browse/MEXEC-32 > > http://mail-archives.apache.org/mod_mbox/maven-users/200607.mbox/< > 58ca838c0607260414w5c61ddcjea269f5c19944...@mail.gmail.com> > Tried the config from the last one and got ClassNotFound again. > > So, it would seem that the classpath isn't set. Will try setting it > manually. > > regards, > Tomasz Borek > > > 2012/9/10 Tomasz Borek <tomasz.bo...@gmail.com> > > Hi, > > Plug-in has a problem with finding a class and wanted to use mailing list > members expertise on it. It may well be I'm using it wrong, if so, please > point where. Also, if you know a better way of doing what I need to achieve > - also please share. > I tried searching archive but this ain't possible due to 404 page when > accessing the link that should point there*. > > *What I'm trying to achieve:* > I have a class that makes a naming check (adheres standards or not) and I > wish to run it during build and fail the build with explanation if findings > are not to my liking. I have the check, it works, reports findings as it > should. Now, I wish to plug that in Maven build, so even folks who run mvn > clean install -DskipTests would get the message if needed. > > Enter exec plugin. > > I wish to run my main class with it, and set a system property which then > will be checked for by "enforce". > > *How I'm going > * > > 1) In my <build> I've added this: > > <plugin> > <groupId>org.codehaus.mojo</groupId> > <artifactId>exec-maven-plugin</artifactId> > <version>1.2.1</version> > <executions> > <execution> > <id>REST-naming-standard</id> > <phase>test</phase> <goals> <goal>exec</goal> </goals> > </execution> > </executions> > <configuration> > > <executable>java</executable> > <arguments> > > <argument>-classpath</argument> > <classpath/> > > <argument>com.company.naming.RestPathNameITest.Main</argument> > </arguments> > </configuration> > </plugin> > > 2) You might want to say, I should try <goal>java</goal> with the required > parameter: <mainClass>. Well, I did. Very similar section with <mainClass> > and without argument with main class was my other try.* * > > <plugin> > <groupId>org.codehaus.mojo</groupId> > <artifactId>exec-maven-plugin</artifactId> > <version>1.2.1</version> > <executions> > <execution> > <id>REST-naming-standard</id> > <phase>test</phase> > <goals> > <goal>java</goal> > </goals> > </execution> > </executions> > <configuration> > <executable>java</executable> > > <mainClass>com.company.naming.RestPathNameITest.Main</mainClass> > <arguments> > <argument>-classpath</argument> > <classpath/> > </arguments> > </configuration> > </plugin> > > * > Errors I'm getting: > *Both are classloader related and (most likely) are thrown by > FindClassInClasspath.isClassInClasspath, either on normal path or exception > path. > > 1) If I go as in 1, above, Maven can't find the class, though > documentation suggests making argument -classpath with empty <classpath/> > will result in full project classpath, and the class I'm trying to run is a > test class. > > Documentation: > http://mojo.codehaus.org/exec-maven-plugin/examples/example-exec-for-java-programs.html > > [INFO] [exec:exec {execution: REST-naming-standard}] > Exception in thread "main" java.lang.NoClassDefFoundError: > com/company/naming/RestPathNameITest/Main > Caused by: java.lang.ClassNotFoundException: > com.company.naming.RestPathNameITest.Main > at java.net.URLClassLoader$1.run(URLClassLoader.java:202) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:190) > at java.lang.ClassLoader.loadClass(ClassLoader.java:306) > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) > at java.lang.ClassLoader.loadClass(ClassLoader.java:247) > Could not find the main class: com.company.naming.RestPathNameITest.Main. > Program will exit. > [INFO] > ------------------------------------------------------------------------ > [ERROR] BUILD ERROR > [INFO] > ------------------------------------------------------------------------ > [INFO] Command execution failed. > > > 2) The other error is more intriguing, it (I think) occurs when the > isClassInClasspath function does the forName and catches exception. Arrays > suggest that something attempted to load the class from one classloader > into another. > > [INFO] Preparing exec:java > [WARNING] Removing: java from forked lifecycle, to prevent recursive > invocation. > [INFO] No goals needed for project - skipping > [INFO] > ------------------------------------------------------------------------ > [ERROR] FATAL ERROR > [INFO] > ------------------------------------------------------------------------ > [INFO] null > [INFO] > ------------------------------------------------------------------------ > [INFO] Trace > java.lang.ArrayStoreException > at java.util.ArrayList.toArray(ArrayList.java:305) > at > org.codehaus.plexus.component.configurator.converters.composite.ArrayConverter.fromConfiguration(ArrayConverter.java:141) > at > org.codehaus.plexus.component.configurator.converters.ComponentValueSetter.configure(ComponentValueSetter.java:247) > at > org.codehaus.plexus.component.configurator.converters.composite.ObjectWithFieldsConverter.processConfiguration(ObjectWithFieldsConverter.java:137) > at > org.codehaus.plexus.component.configurator.BasicComponentConfigurator.configureComponent(BasicComponentConfigurator.java:56) > at > org.apache.maven.plugin.DefaultPluginManager.populatePluginFields(DefaultPluginManager.java:1357) > at > org.apache.maven.plugin.DefaultPluginManager.getConfiguredMojo(DefaultPluginManager.java:724) > at > org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:468) > at > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694) > at > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556) > at > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535) > at > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387) > at > org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348) > at > org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180) > at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328) > at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138) > at org.apache.maven.cli.MavenCli.main(MavenCli.java:362) > at > org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) > at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) > at > org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) > at org.codehaus.classworlds.Launcher.main(Launcher.java:375) > [INFO] > ------------------------------------------------------------------------ > [INFO] Total time: 49 seconds > [INFO] Finished at: Mon Sep 10 13:19:35 CEST 2012 > [INFO] Final Memory: 124M/404M > [INFO] > ------------------------------------------------------------------------ > > > Any ideas? > > regards, > Tomasz Borek > * Page I found the link: > http://mojo.codehaus.org/exec-maven-plugin/mail-lists.html > Link itself: http://archive.codehaus.org/lists/org.codehaus.mojo.user > > >
