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
