[shrinkwrap-issues] [JBoss JIRA] (SHRINKWRAP-369) ShrinkWrapClassLoader does not find service provider in WAR

[Martin Kouba (Commented) (JIRA)]

    [ https://issues.jboss.org/browse/SHRINKWRAP-369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12651499#comment-12651499 ] 

Martin Kouba commented on SHRINKWRAP-369:
-----------------------------------------

This issue applies to WAR. Change your testcase to:
{code}
    /**
     * SHRINKWRAP-369
     */
    @Test
    public void shouldBeAbleToFindServiceProvider() throws Exception {
        final WebArchive archive = ShrinkWrap.create(WebArchive.class).addAsServiceProvider(Cloneable.class,
            String.class);
        System.out.println(archive.toString(true));
        final ShrinkWrapClassLoader cl = new ShrinkWrapClassLoader((ClassLoader) null, archive);
        final Enumeration<URL> found = cl.findResources("META-INF/services/java.lang.Cloneable");
        if(found.hasMoreElements())
            System.out.println(found.nextElement().toString());
        else
           fail("Resource not found");
    }
{code}

Final archive is:
{code}
5a267a22-f1e4-4af8-821f-b00fae01543c.war:
/WEB-INF/
/WEB-INF/classes/
/WEB-INF/classes/META-INF/
/WEB-INF/classes/META-INF/services/
/WEB-INF/classes/META-INF/services/java.lang.Cloneable
{code}

And the resource is not found. The problem is that shrinkwrap builds correct archive however later on when Weld EE Embedded uses ShrinkWrapClassloader to load service providers. Its ServiceLoader (that works BTW in the same way as standard java.util.ServiceLoader) tries to find "META-INF/services/javax.enterprise.inject.spi.Extension" and fails.

This was discussed in SHRINKWRAP-266 in detail. In the end the *addAsServiceProvider* method was added in order to add service providers in WEB-INF/classes/META-INF/services. This works ok for archive building but not for loading service providers via ShrinkWrapClassloader. 
                
> ShrinkWrapClassLoader does not find service provider in WAR
> -----------------------------------------------------------
>
>                 Key: SHRINKWRAP-369
>                 URL: https://issues.jboss.org/browse/SHRINKWRAP-369
>             Project: ShrinkWrap
>          Issue Type: Bug
>          Components: api
>    Affects Versions: 1.0.0-beta-3
>            Reporter: Martin Kouba
>
> I ran into this issue when working with *Arquillian* and *Weld EE 1.1 Embedded container* (that uses ShrinkWrapClassLoader under the hood). ShrinkWrap correctly builds web archive with CDI extension (using org.jboss.shrinkwrap.api.container.ManifestContainer.addAsServiceProvider(Class<?>, Class<?>...); this was also discussed in SHRINKWRAP-266).
> Output:
> {code}
> test.war
> /WEB-INF/
> /WEB-INF/classes/
> /WEB-INF/classes/META-INF/
> /WEB-INF/classes/META-INF/services/
> /WEB-INF/classes/META-INF/services/javax.enterprise.inject.spi.Extension
> {code}
> However no extensions are found. *org.jboss.shrinkwrap.api.classloader.ShrinkWrapClassLoader* probably does not find any resource when looking for "META-INF/services/javax.enterprise.inject.spi.Extension".
> Note that I'm not quite sure whether it's ShrinkWrapClassLoader or WeldEEMockContainer issue.

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