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<td class="page-title-pattern-first-line " style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://issues.jboss.org/browse/WELD" style="color: #3b73af; text-decoration: none">Weld</a> / <a href="https://issues.jboss.org/browse/WELD-2304" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-5f029509-85d9-4c1e-9cc7-069a5244ae89" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://issues.jboss.org/browse/WELD-2304" style="color: #3b73af; text-decoration: none">WELD-2304</a> </td>
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<td style="vertical-align: top;; padding: 0px; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://issues.jboss.org/browse/WELD-2304" style="color: #3b73af; text-decoration: none">Unexpected observer resolution of alternative beans selected using @Priority</a> </span> </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Issue Type:</th>
<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-5f029509-85d9-4c1e-9cc7-069a5244ae89" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 3.0.0.Beta1, 2.4.1.Final, 2.3.5.Final </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Assignee:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Components:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Events </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 08/Jan/17 7:00 AM </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Priority:</th>
<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-major-7566b29d-67df-4e9b-84c3-ae6e1046790c" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Reporter:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="sermojohn" id="email_sermojohn" href="https://issues.jboss.org/secure/ViewProfile.jspa?name=sermojohn" style="color:#3b73af;; color: #3b73af; text-decoration: none">Ioannis Sermetziadis</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0; margin-top: 0">When trying to combine observer methods with alternative beans that are selected/enabled using @Priority an unexpected behaviour was identified.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">This unit test exposes this "possible" issue:<br> <a href="https://github.com/sermojohn/core/commit/ec63f1579652af58b1e01cd141720be906b6d222" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">https://github.com/sermojohn/core/commit/ec63f1579652af58b1e01cd141720be906b6d222</a></p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">When enabling an alternative bean of some type using a higher @Priority value than another alternative bean of the same type, if both beans define an observer method that can received an event of the same type, only the enabled bean would be expected to receive the fired events. However, both alternative beans receive the event. This restricts modularity because bean defined in a bean archive that defines an observer method cannot be replaced at runtime. When trying to do the exact same thing scenario using alternatives enabled through beans.xml, only the observer of the enabled alternative is triggered.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">If this is not an issue, probably it should be considered as a clarification improvement for CDI specification. </p> </td>
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