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<p style="margin: 10px 0 0 0; margin-top: 0">According to EE.6.2.3.7 CDI should be setting a TCCL during the invocation of observer methods.</p>
</blockquote> <p style="margin: 10px 0 0 0">Not true. EE.6.2.3.7 only requires that <em>"...containers provide a per thread context class loader that can be used to load top level application classes..."</em> and refers to section EE.8.2.5 “Dynamic Class Loading” which gives an example of a technique which should be used by libraries to load the classes:</p> <p style="margin: 10px 0 0 0"></p>
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<td style=" line-height: 1.4em !important; padding: 0em; vertical-align: top;; padding: 0px; border-collapse: collapse"> <pre style="font-size: 1em; margin: 0 10px; margin-top: 10px; width: auto; padding: 0;; margin: 10px 0 0 0; margin-top: 0"><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">ClassLoader cl = Thread.currentThread().getContextClassLoader(); </span><span style="color: #008200; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">// Shortened for clarity</span></pre> </td>
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<td style=" line-height: 1.4em !important; padding: 0em; vertical-align: top;; padding: 0px; border-collapse: collapse"> <pre style="font-size: 1em; margin: 0 10px; width: auto; padding: 0;; margin: 10px 0 0 0; margin-top: 0"><span style="color: #006699; font-weight: bold; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">if</span><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;"> (cl != </span><span style="color: #006699; font-weight: bold; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">null</span><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">) {</span></pre> </td>
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<td style=" line-height: 1.4em !important; padding: 0em; vertical-align: top;; padding: 0px; border-collapse: collapse"> <pre style="font-size: 1em; margin: 0 10px; width: auto; padding: 0;; margin: 10px 0 0 0; margin-top: 0"><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;"> </span><span style="color: #006699; font-weight: bold; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">try</span><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;"> {</span></pre> </td>
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<td style=" line-height: 1.4em !important; padding: 0em; vertical-align: top;; padding: 0px; border-collapse: collapse"> <pre style="font-size: 1em; margin: 0 10px; width: auto; padding: 0;; margin: 10px 0 0 0; margin-top: 0"><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;"> clazz = Class.forName(name, </span><span style="color: #006699; font-weight: bold; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">false</span><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">, cl);</span></pre> </td>
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<td style=" line-height: 1.4em !important; padding: 0em; vertical-align: top;; padding: 0px; border-collapse: collapse"> <pre style="font-size: 1em; margin: 0 10px; width: auto; padding: 0;; margin: 10px 0 0 0; margin-top: 0"><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;"> } </span><span style="color: #006699; font-weight: bold; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">catch</span><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;"> (ClassNotFoundException ex) {</span></pre> </td>
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<td style=" line-height: 1.4em !important; padding: 0em; vertical-align: top;; padding: 0px; border-collapse: collapse"> <pre style="font-size: 1em; margin: 0 10px; width: auto; padding: 0;; margin: 10px 0 0 0; margin-top: 0"><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;"> clazz = Class.forName(name);</span></pre> </td>
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<td style=" line-height: 1.4em !important; padding: 0em; vertical-align: top;; padding: 0px; border-collapse: collapse"> <pre style="font-size: 1em; margin: 0 10px; width: auto; padding: 0;; margin: 10px 0 0 0; margin-top: 0"><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;"> }</span></pre> </td>
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<td style=" line-height: 1.4em !important; padding: 0em; vertical-align: top;; padding: 0px; border-collapse: collapse"> <pre style="font-size: 1em; margin: 0 10px; margin-bottom: 10px; width: auto; padding: 0;; margin: 10px 0 0 0; margin-top: 0"><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">}
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<p style="margin: 10px 0 0 0; margin-top: 0">Codebases, such as Apache DeltaSpike, have been written to assume that the TCCL will be the web application's ClassLoader...</p>
</blockquote> <p style="margin: 10px 0 0 0">That's wrong assumption.</p>
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<p style="margin: 10px 0 0 0; margin-top: 0">We cannot set the TCCL for two different web applications at the same time.</p>
</blockquote> <p style="margin: 10px 0 0 0">First of all, the problem is only related to container lifecycle event notifications. Weld notifies all the observers using the thread which started the bootstrap, ie. calls <tt>org.jboss.weld.bootstrap.api.Bootstrap</tt> methods. It's the responsibility of the EE container/integrator to set the correct TCCL there. Weld has no way to identify the correct TCCL (container-specific) which should be used.</p>
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<p style="margin: 10px 0 0 0; margin-top: 0">It seems OWB set the TCCL to the web application's classloader. </p>
</blockquote> <p style="margin: 10px 0 0 0">Can you point me to the place where OWB does the trick? I briefly browsed the OWB codebase and I did not find anything related. My guess would be that it works in OWB due to a different interpretation of <b>@ApplicationScoped, extension lifecycle and bean archives in EARs</b> (see also the very long discussion under <a href="https://issues.jboss.org/browse/CDI-129" title="Clarify behaviour of @ApplicationScoped in EARs" class="issue-link" data-issue-key="CDI-129" style="color: #3b73af; text-decoration: none">CDI-129</a>).</p> </td>
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