Hi,

Why the maven plugins doesn´t load all libraries declared in pom.xml?
I tried to use the initClassLoader because this code works in 
jaxws-maven-plugin.
In the code of jaxws-maven-plugin there is:

" Need to build a URLClassloader since Maven removed it form the chain "

Why?

Thanks


-----Mensagem original-----
De: Tim Kettler [mailto:[EMAIL PROTECTED]
Enviada em: quarta-feira, 21 de maio de 2008 10:57
Para: Maven Users List
Assunto: Re: Problem with classloader in maven plugin

Hi,

you've missunderstood the concept of a context classloader.

A documentation bug [1] is open since a long time. Setting the context
classloader doesn't mean that all classes created from that point on are
created through this classloader. See here [2] and [3] for more information.

[1] http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4868493
[2] http://www.javaworld.com/javaqa/2003-06/01-qa-0606-load.html
[3] http://www.javageeks.com/Papers/ClassForName/index.html

-Tim

Claudio Ranieri schrieb:
> Hi
>
> I am trying to create a maven plugin to jboss wsconsume, but I have a problem 
> with classloader in plugin.
> My plugin is based in an ant task (WSConsumeTask).
> I am using maven 2.0.8 on Windows machine.
> When I created a simple Java project with libraries necessary, my code works.
> How shown below:
>
> public static void main(String[] args) {
>   WSConsumeTask t = new WSConsumeTask();
>   t.setWsdl("https://xxx/crypto?wsdl";);
>   t.setVerbose(true);
>   t.setKeep(true);
>   t.execute();
> }
>
> But when I am using into maven plugin, I got problem with classloader.
> I got this exception:
>
> C:\eclipse\workspace\TestePluginMaven\output\com\buscape\bean\CryptoService.java:7:
>  cannot find symbol
> symbol  : class Service
> location: package javax.xml.ws
> import javax.xml.ws.Service;
>                     ^
> C:\eclipse\workspace\TestePluginMaven\output\com\buscape\bean\CryptoService.java:8:
>  cannot find symbol
> symbol  : class WebEndpoint
> location: package javax.xml.ws
> import javax.xml.ws.WebEndpoint;
>                     ^
> C:\eclipse\workspace\TestePluginMaven\output\com\buscape\bean\CryptoService.java:9:
>  cannot find symbol
> symbol  : class WebServiceClient
> location: package javax.xml.ws
> import javax.xml.ws.WebServiceClient;
>
> The plugin classloader doesn´t load the jaxws libraries. But this libraries 
> was added in pom.xml of plugin.
> I tried to add dependencies tag in my plugin config, but didn´t works. How 
> shown below:
>
> <plugin>
>   <groupId>jboss</groupId>
>   <artifactId>maven-jbossws-plugin</artifactId>
>   <version>1.0.0</version>
>   <configuration>
>     <verbose>true</verbose>
>     <keep>true</keep>
>     <wsdl>https://xxx/crypto?wsdl</wsdl>
>   </configuration>
>   <dependencies>
>     <dependency>
>       <groupId>jboss.jbossws</groupId>
>       <artifactId>jaxws-tools</artifactId>
>       <version>3.0.1-native-2.0.4.GA</version>
>       <scope>compile</scope>
>     </dependency>
>     <dependency>
>       <groupId>jboss.jbossws</groupId>
>       <artifactId>jboss-jaxws</artifactId>
>       <version>3.0.1-native-2.0.4.GA</version>
>       <scope>compile</scope>
>     </dependency>
>   </dependencies>
> </plugin>
>
> I tried too to use an initClassLoader based in jaxws-maven-plugin source, how 
> shown below:
>
>    private String initClassLoader(ClassLoader parent) throws 
> MojoExecutionException {
>                     try {
>                                 List classpathFiles = 
> project.getCompileClasspathElements();
>                         URL[] urls = new URL[classpathFiles.size() + 4];
>                         StringBuffer classPath = new StringBuffer();
>                         for (int i = 0; i < classpathFiles.size(); ++i) {
>                             getLog().debug((String)classpathFiles.get(i));
>                             urls[i] = new 
> File((String)classpathFiles.get(i)).toURL();
>                             classPath.append((String)classpathFiles.get(i));
>                             classPath.append(File.pathSeparatorChar);
>                         }
>                         urls[classpathFiles.size()] = new 
> File(project.getBuild().getOutputDirectory()).toURL();
>
>                         urls[classpathFiles.size() + 1] = 
> getArtifact("jboss.jbossws:jboss-jaxws");
>
>                         urls[classpathFiles.size() + 2] = 
> getArtifact("jboss.jbossws:jaxws-tools");
>
>                         File toolsJar = new 
> File(System.getProperty("java.home"),"../lib/tools.jar");
>                         if (!toolsJar.exists()) {
>                                 toolsJar = new 
> File(System.getProperty("java.home"),"lib/tools.jar");
>                         }
>                         urls[classpathFiles.size() + 3] = toolsJar.toURL();
>
>                         System.out.println("urls: "+Arrays.toString(urls));
>
>                         URLClassLoader cl = new URLClassLoader(urls,parent);
>                         // Set the new classloader
>                         Thread.currentThread().setContextClassLoader(cl);
>                         
> System.setProperty("java.class.path",classPath.toString());
>                         String sysCp = System.getProperty("java.class.path");
>                         return sysCp;
>                     }
>                     catch (MalformedURLException e) {
>                         throw new MojoExecutionException(e.getMessage(),e);
>                     }
>                     catch (DependencyResolutionRequiredException e) {
>                         throw new MojoExecutionException(e.getMessage(),e);
>                     }
>
>     }
>
>     public void execute() throws MojoExecutionException {
>                   // Need to build a URLClassloader since Maven removed it 
> form the chain
>         ClassLoader parent = this.getClass().getClassLoader();
>         String originalSystemClasspath = this.initClassLoader( parent );
>
>         try {
>
>                         // Execute WSConsumeTask
>                         WSConsumeTask t = new WSConsumeTask();
>                                   t.setWsdl(wsdl);
>                                   t.setVerbose(verbose);
>                                   t.setKeep(keep);
>                                   t.execute();
>         }
>         finally {
>                 // Set back the old classloader
>           Thread.currentThread().setContextClassLoader(parent);
>           System.setProperty("java.class.path",originalSystemClasspath);
>         }
>     }
>
> But, it doesn´t works.
> Please, can someone help me?
> Thanks
>


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