[jboss-user] [JBoss Microcontainer] - Using a deployer to add jars to a webapp classpath.

[Stan Silvert]

Stan Silvert [http://community.jboss.org/people/stan.silvert%40jboss.com] created the discussion

"Using a deployer to add jars to a webapp classpath."

To view the discussion, visit: http://community.jboss.org/message/536136#536136

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In AS5 this was fairly straightforward.  But in AS6 the same code doesn't work.

I want to add the JSF impl jars on the fly using a JSFDeployer.  The reason is that I want to allow different JSF impls or no impl at all.

I did the following:
* Removed jsf-libs directory from the classpath in jbossweb.sar/META-INF/jboss-structure.xml
* extend AbstractSimpleVFSRealDeployer<JBossWebMetaData>
* In constructor, setStage(DeploymentStages.POST_PARSE)
* In deploy(VFSDeploymentUnit unit, JBossWebMetaData metaData), do this:

{code}private void addClasspath(VFSDeploymentUnit unit, URL url) throws MalformedURLException
   {
       // note: url points to the directory where the JSF impl jars live
      try
      {                  
         // add jar files if url is a directory
         if (vFile.isDirectory())
         { 
            for (VirtualFile jarFile : vFile.getChildrenRecursively(JAR_FILTER))
            {               
               unit.addClassPath(jarFile);
               System.out.println("$2 Added " + jarFile + " to classpath for " + unit.getName());
            }
         }
      }
      catch (IOException e)
      {
         log.warn("Unable to add URL to classpath: " + url.toString());
      }
      catch (URISyntaxException e)
      {
         log.warn("Unable to add URL to classpath: " + url.toString());
      }
   }{code}

 The System.out shows me that the code found all the correct jars and called unit.AddClassPath().
{quote}14:13:35,261 INFO  [STDOUT] $2 Added "/C:/projects/astrunk/build/target/jboss-6.0.0-SNAPSHOT/server/default/deployers/jsf.deployer/Mojarra-2.0/jsf-api.jar" to classpath for vfs:///C:/projects/astrunk/build/target/jboss-6.0.0-SNAPSHOT/server/default/deploy/jboss-jsf-20test-jsfunit.war
14:13:35,267 INFO  [STDOUT] $2 Added "/C:/projects/astrunk/build/target/jboss-6.0.0-SNAPSHOT/server/default/deployers/jsf.deployer/Mojarra-2.0/jsf-impl.jar" to classpath for vfs:///C:/projects/astrunk/build/target/jboss-6.0.0-SNAPSHOT/server/default/deploy/jboss-jsf-20test-jsfunit.war{quote}

But in AS6, Tomcat is no longer able to load the JSF impl classes.  The only reason it finds JBossJSFConfigureListener is because I unjarred the class and put it in the root of deployers/jsf.deployer:

{quote}14:13:54,446 INFO  [TomcatDeployment] deploy, ctxPath=/jboss-jsf-20test-jsfunit
14:13:54,507 ERROR [[/jboss-jsf-20test-jsfunit]] Error configuring application listener of class org.jboss.jsf.integration.config.JBossJSFConfigureListener: java.lang.NoClassDefFoundError: com/sun/faces/config/ConfigureListener
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
        at org.jboss.classloader.spi.base.BaseClassLoader.access$200(BaseClassLo
ader.java:70)
        at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.
java:668)
        at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.
java:627)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseC
lassLoader.java:626)
        at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseC
lassLoader.java:603){quote}

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