[jbossseam-issues] [JBoss JIRA] Commented: (JBSEAM-3323) JPA example on Tomcat 6.X and glassfish throws a IllegalStateException: Cannot load WEB-INF/classes/org/jboss/seam/example/jpa/Hotel.class

[Yannick Lazzari (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBSEAM-3323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12429124#action_12429124 ] 

Yannick Lazzari commented on JBSEAM-3323:
-----------------------------------------

I did a diff between the sources of BETA1 and the nightly build of September 11th and if what I found is the fix for this problem, I think there still might be some issues.  First of all, I see that it's now hardcoded to exclude the folders "WEB-INF/classes/*" and "/WEB-INF/classes/*" when scanning the war root.  Doesn't that effectively prevent to have any Seam components deployed in those folders because they're going to be skipped in the whole scanning process?  I guess the workaround would be to always have your components in an archive in the WEB-INF/lib folder but I don't understand the limitation.  Plus, I wanted to try the Wicket integration and I had the same problem with the classes that are deployed in the "WEB-INF/wicket" folder.  Should that folder be added to the list of excluded folders as well?  Maybe the solution would be to refactor the way the AbstractDeploymentHandler turns filenames into class names (static method filenameToClassname).  Instead of ignoring the folders, we could simply remove the "WEB-INF/classes", "/WEB-INF/classes" or "WEB-INF/wicket" prefix from the file name before turning it into a class name.  I'm using Glassfish too by the way.  Is this an application server specific problem?  I guess I could write my own deployment handler and find a way to override Seam's default ComponentDeploymentHandler but I'm sure other people could benefit from this.  Thanks.

> JPA example on Tomcat 6.X and glassfish throws a IllegalStateException: Cannot load WEB-INF/classes/org/jboss/seam/example/jpa/Hotel.class
> ------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: JBSEAM-3323
>                 URL: https://jira.jboss.org/jira/browse/JBSEAM-3323
>             Project: Seam
>          Issue Type: Bug
>          Components: Examples, Platform interoperability
>    Affects Versions: 2.1.0.BETA1
>            Reporter: Jay Balunas
>            Assignee: Pete Muir
>            Priority: Critical
>             Fix For: 2.1.0.CR1
>
>
> When deploying the JPA example without embedded  I see the exception below.  
> I have added the hsql.jar file to tomcat, and deployed the war from the "dist-tomcat6" directory.  I do not believe it is related, but the instructions in the readme say to deploy the war in "dist-jboss" which does not exist.  This is probably a typo.  Just to be sure I did attempt to deploy the war in the "dist-jboss" but it failed with other errors because it does not package all the right jars.
> SEVERE: Exception sending context initialized event to listener instance of class org.jboss.seam.servlet.SeamListener
> java.lang.IllegalStateException: Cannot load WEB-INF/classes/org/jboss/seam/example/jpa/Hotel.class from WebappClassLoader
>   delegate: false
>   repositories:
>     /WEB-INF/classes/
> ----------> Parent Classloader:
> org.apache.catalina.loader.StandardClassLoader at 12a54f9
>  (using getResourceAsStream() returned null)
>         at org.jboss.seam.deployment.AbstractDeploymentHandler.getClassFile(AbstractDeploymentHandler.java:41)
>         at org.jboss.seam.deployment.ComponentDeploymentHandler.handle(ComponentDeploymentHandler.java:57)
>         at org.jboss.seam.deployment.DeploymentStrategy.handle(DeploymentStrategy.java:177)
>         at org.jboss.seam.deployment.AbstractScanner.handleItem(AbstractScanner.java:30)
>         at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:141)
>         at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137)
>         at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137)
>         at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137)
>         at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137)
>         at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137)
>         at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137)
>         at org.jboss.seam.deployment.URLScanner.handleDirectory(URLScanner.java:137)
>         at org.jboss.seam.deployment.URLScanner.scanDirectories(URLScanner.java:40)
>         at org.jboss.seam.deployment.StandardDeploymentStrategy.scan(StandardDeploymentStrategy.java:107)
>         at org.jboss.seam.init.Initialization.create(Initialization.java:113)
>         at org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:34)
>         at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3843)
>         at org.apache.catalina.core.StandardContext.start(StandardContext.java:4350)
>         at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
>         at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
>         at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
>         at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:829)
>         at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:718)
>         at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490)
>         at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1215)
>         at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:293)
>         at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
>         at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1337)
>         at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
>         at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
>         at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
>         at java.lang.Thread.run(Thread.java:595)

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