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<a class="user-hover" rel="ThomasGo" id="email_ThomasGo" href="https://issues.jboss.org/secure/ViewProfile.jspa?name=ThomasGo" style="color:#003366;">Thomas Goettlich</a>
updated <img src="https://issues.jboss.org/images/icons/health.gif" height="16" width="16" border="0" align="absmiddle" alt="Enhancement"> <a style='color:#003366;text-decoration:none;' href='https://issues.jboss.org/browse/WELD-1162'>WELD-1162</a>
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<a style='color:#003366;text-decoration:none;' href='https://issues.jboss.org/browse/WELD-1162'><strong>Intercept brigde methods with a different signature</strong></a>
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<strong style="font-weight:normal;color:#505050;">Change By:</strong>
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<a class="user-hover" rel="ThomasGo" id="email_ThomasGo" href="https://issues.jboss.org/secure/ViewProfile.jspa?name=ThomasGo" style="color:#003366;">Thomas Goettlich</a>
(10/Jul/12 7:49 AM)
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<strong style="font-weight:normal;color:#505050;">Description:</strong>
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<span class="diffcontext">According to WELD-568 bridge methods for covariant return types should not be intercepted.<br><br>However, bridge methods that have a different signature, e.g. by using generics, should be interceptable.<br><br>Consider the following case using generic EJB methods:<br>{code}<br>//base definitions<br>public class BaseParam {}<br><br>public interface BaseInterface<T extends BaseParam> {<br> public void doSomething( T param);<br>}<br></span>
<span class="diffaddedchars" style="background-color:#ddfade;">{code}</span>
<span class="diffcontext"><br></span>
<span class="diffaddedchars" style="background-color:#ddfade;">{code}<br></span>
<span class="diffcontext">//extension and ejb<br>public class SpecialParam extends BaseParam{}<br><br>public interface SpecialService extends BaseInterface<SpecialParam> {}<br><br>@Stateless<br>@Local(SpecialService.class)<br>@SomeCDIInterceptorBinding<br>public class SpecialServiceImpl implements SpecialService {<br> public void doSomething( SpecialParam param) {}<br>}<br></span>
<span class="diffaddedchars" style="background-color:#ddfade;">{code}</span>
<span class="diffcontext"><br></span>
<span class="diffaddedchars" style="background-color:#ddfade;">{code}<br></span>
<span class="diffcontext">//call in another EJB<br>@EJB<br>private SpecialService s;<br><br>...<br><br>s.doSomething(new SpecialParam());<br>{code}<br><br>For this call the invocation context contains the method signature "SpecialServiceImpl.doSomething(BaseParam)" which is the bridge method generated due to the generic parameter.<br><br>However, the method "Beans.getInterceptableMethods(WeldClass)" ignores this method when registering the interceptor because it is a bridge method:<br>{code}<br>boolean businessMethod = !annotatedMethod.isStatic()<br> && !annotatedMethod.isAnnotationPresent(Inject.class)<br> && !annotatedMethod.getJavaMember().isBridge();<br>{code}<br><br>Due to this, calls to bridge methods within EJBs are not intercepted.<br><br><br>Possible solution:<br><br>Bridge methods are not ignored by default but are replaced by non-bridge methods having the same signature when the interceptable methods are collected. That should solve this issue as well as WELD-568.</span>
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<strong style="font-weight:normal;color:#505050;">Forum Reference:</strong>
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<span class="diffcontext">https://community.jboss.org/thread/202278?tstart=0</span>
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