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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-2461" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-a33bd729-b83c-469b-9441-1e7395f27d5e" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://issues.jboss.org/browse/WELD-2461" style="color: #3b73af; text-decoration: none">WELD-2461</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-2461" style="color: #3b73af; text-decoration: none">ProcessBean observer method not notified of producer method beans</a> </span> </td>
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 3.0.2.Final </td>
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Events, Extensions </td>
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 02/Feb/18 8:26 PM </td>
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<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-1454eca6-d543-4b7b-8be0-fcf986109833" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </td>
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<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="ljnelson" id="email_ljnelson" href="https://issues.jboss.org/secure/ViewProfile.jspa?name=ljnelson" style="color:#3b73af;; color: #3b73af; text-decoration: none">Laird Nelson</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">(I've posted a summary on <a href="https://stackoverflow.com/questions/48591743/how-can-i-get-notified-of-processbean-events-for-a-producer-method-returning-a-t" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">StackOverflow</a>.)</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">In short, it is my understanding that a (valid) producer method returning type <tt>X</tt> is a bean whose bean types include <tt>X</tt> and should therefore be observable by a container lifecycle event observer method of the form:</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; margin-bottom: 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;">private</span><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;">final</span><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;">void</span><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;"> processBean(</span><span style="color: gray; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">@Observes</span><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;">final</span><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;"> ProcessBean<X> event) {</span><span style="color: #008200; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">/*...*/</span><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">}
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</div> <p style="margin: 10px 0 0 0"></p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">…in addition to being observable by an observer of the <tt>ProcessProducerMethod</tt> event type.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">But in fact it seems to me that the only way an observer of <tt>ProcessBean</tt> events can get notified of producer methods (a valid kind of bean) is to observe the unbounded wildcard or an equivalent construct, e.g.</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; margin-bottom: 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;">private</span><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;">final</span><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;">void</span><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;"> processBean(</span><span style="color: gray; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">@Observes</span><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;">final</span><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;"> ProcessBean<?> event) {</span><span style="color: #008200; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">/*...*/</span><span style="color: black; font-family: 'Consolas', 'Bitstream Vera Sans Mono', 'Courier New', Courier, monospace !important;">}
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</div> <p style="margin: 10px 0 0 0"></p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">(I'm obviously aware that I could define an observer method that observes <tt>ProcessProducerMethod</tt> events, but I am specifically interested in observing all beans, producers or not, of a particular type.)</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I am not sure of the culprit, but after debugging into Weld's innards I found that it looks to my naïve eyes like at some point the type parameters got reversed when Weld builds a <tt>ProcessProducerMethod</tt> event to fire, but perhaps only in certain cases since observing a <tt>ProcessProducerMethod</tt> directly works fine.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">That is, <tt>ProcessBean<X></tt>'s actual type parameter value gets "put" into the <tt>T</tt> "slot" of <tt>ProcessProducerMethod<T, X></tt> when Weld is preparing to notify my general-purpose <tt>ProcessBean</tt> observer method. Here is the string/debugger output of a <tt>Resolvable</tt> passed in to <tt>TypeSafeResolver#resolve()</tt> during the execution of <tt>ObserverNotifier#resolveObserverMethods()</tt>: </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; 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;">Types: [interface javax.enterprise.inject.spi.ProcessBean<class com.foo.HostBean>, interface javax.enterprise.inject.spi.ProcessProducerMethod<class java.lang.Integer,class com.foo.HostBean>, class java.lang.Object]; Bindings: [QualifierInstance {annotationClass=interface javax.enterprise.inject.Any, values={}}]
</span></pre> </td>
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</div> <p style="margin: 10px 0 0 0"></p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">It is my understanding from the CDI specification that this should be a <tt>ProcessBean<Integer></tt> and a <tt>ProcessProducerMethod<Integer, HostBean></tt>, but instead it is a <tt>ProcessBean<HostBean></tt> and a <tt>ProcessProducerMethod<Integer, HostBean></tt>.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">At any rate, I'm unfamiliar with this area of the codebase and may have analyzed it wrongly. My apologies if this is an invalid bug report.</p> </td>
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