Nicolas,
I see what the problem is. Check out this code in
ExternalPermutationWorkerFactory<http://code.google.com/p/google-web-toolkit/source/browse/releases/1.6/dev/core/src/com/google/gwt/dev/ExternalPermutationWorkerFactory.java#246>
:
// Cook up the classpath, main class, and extra args
args.addAll(Arrays.asList("-classpath",
ManagementFactory.getRuntimeMXBean().getClassPath(),
CompilePermsServer.class.getName(), "-host", "localhost", "-port",
String.valueOf(port), "-logLevel", logLevel.toString(), "-cookie",
cookie));
This is getting the system-level classpath in order to fork a new process,
which in the Maven case is wrong. I guess the other option would be to check
if (this.getClass().getClassLoader() instanceof URLClassLoader)... if that's
true, we should be able to send over the classpath for the ClassLoader that
contains gwt-dev-*.jar.
Bob, do you have any thoughts on this? This is your code I think.
Scott
On Thu, Feb 19, 2009 at 10:30 AM, nicolas.deloof
<[email protected]>wrote:
>
> Hi,
>
> I'm trying to upgrade the gwt-maven plugin to support 1.6 release.
> I've applied the shell / compiler changes and now try to launch the
> compiler. I got a strange error :
>
> [INFO] Compiling 15 permutations
> [INFO] Process output
> [INFO] [ERROR] java.lang.NoClassDefFoundError: com/google/gwt/
> dev/CompilePermsServer
> [INFO] [ERROR] Caused by: java.lang.ClassNotFoundException:
> com.google.gwt.dev.CompilePermsServer
> [INFO] [ERROR] at java.net.URLClassLoader$1.run
> (URLClassLoader.java:200)
> [INFO] [ERROR] at java.security.AccessController.doPrivileged
> (Native Method)
> [INFO] [ERROR] at java.net.URLClassLoader.findClass
> (URLClassLoader.java:188)
> [INFO] [ERROR] at java.lang.ClassLoader.loadClass
> (ClassLoader.java:307)
> [INFO] [ERROR] at sun.misc.Launcher$AppClassLoader.loadClass
> (Launcher.java:301)
> [INFO] [ERROR] at java.lang.ClassLoader.loadClass
> (ClassLoader.java:252)
> [INFO] [ERROR] at java.lang.ClassLoader.loadClassInternal
> (ClassLoader.java:320)
> [INFO] [ERROR] Could not find the main class:
> com.google.gwt.dev.CompilePermsServer. Program will exit.
> [INFO] [ERROR] Exception in thread "main"
>
> The plugin creates a native command script, like this one :
>
> "D:\jdk6\jre\bin\java" -Xmx512M -cp "D:\repository\org\codehaus\mojo
> \gwt-maven-plugin\1.1-SNAPSHOT\gwt-maven-plugin-1.1-SNAPSHOT.jar"
> org.codehaus.mojo.gwt.fork.ForkBooter "D:\projets\webapp\target
> \gwt.classpath" com.google.gwt.dev.Compiler -gen "D:\projets\webapp
> \target\gen" -logLevel INFO -style OBF -war "D:\projets\webapp\target
> \webapp-1.0.0-SNAPSHOT" -localWorkers 2 com.sfr.bios.rc.CADM
>
> The "ForkBooter" class is used to bypass Windows command line length
> limitation. It created a child classloader based on project
> dependencies list. In my case, the gwt.classpath file looks like :
>
> D:\projets\webapp\src\main\java
> D:\projets\webapp\target\generated-sources\gwt
> D:\projets\webapp\src\main\resources
> D:\projets\webapp\target\classes
> D:\repository\com\google\gwt\gwt-user\1.6.0\gwt-user-1.6.0.jar
> D:\repository\com\google\gwt\gwt-dev\1.6.0\gwt-dev-1.6.0-windows.jar
> D:\repository\com\google\gwt\gwt-servlet\1.6.0\gwt-servlet-1.6.0.jar
> ...
>
> As you can notice, the expected gwt-dev jar is present.
>
> I suppose the "Compiling * permutations - Process output" step has
> some Classloader issue that doesn't support our nested ClassLoader.
> Maybe it uses SystemClassloader directly ?
>
> I didn't get further with this issue debugging the compiler to
> understand what's wrong, maybe you've got an idea ?
>
> Nicolas
> >
>
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