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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Change By:</th> 
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                                                    <td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <span class="diffcontext">h2. Motivation<br>CDI apps usually consist of user business logic, libraries (e.g. DeltaSpike) and integration stuff (e.g. WildFly subsystems - JSF, Bean Validation, Batch). Most applications only use a small part of the beans provided by libraries and integrations. However, Weld has to retain the metadata for all beans in memory. <br><br>Measurements showed that a simple bean/producer method takes approx. 1-2 KB. Batch subsystem which is automatically enabled in WildFly registers ~ 60 beans (producers). One could exclude the subsystem completely but this approach has drawbacks. E.g. if you only use one the beans you cannot exclude the whole subsystem/bean archive.<br><br>h2. Solution<br>Allow to instruct Weld to find "unused" beans and drop their metadata after bootstrap. An unused bean:<br>* is not a built-in bean, extension, interceptor, decorator<br>* does not have a name<br>* does not declare an observer<br>* is not eligible for injection to any injection point<br>* does not declare a producer which is eligible for injection to any injection point<br><br>h2. Problems:<br># Programmatic lookup - no easy way to detect, at least {{Instance&lt;&gt;}} injection points should be considered<br># EE components might be installed after Weld initialization finished - this cleanup must be performed after all EE components are installed<br><br>h2. Configuration<br>User should be able to exclude some beans from removal. E.g. a regular expression might be used to match the bean classes which are</span> <span class="diffaddedchars" style="background-color:#ddfade;"> included/</span> <span class="diffcontext"> excluded.<br><br>h2. Integrators<br></span> <span class="diffaddedchars" style="background-color:#ddfade;">-</span> <span class="diffcontext">We should probably add a new method to {{org.jboss.weld.bootstrap.api.Bootstrap}} with the following contract:</span> <span class="diffaddedchars" style="background-color:#ddfade;">-</span> <span class="diffcontext"><br>*</span> <span class="diffaddedchars" style="background-color:#ddfade;"> -</span> <span class="diffcontext"> optional - an integrator is not required to invoke this method</span> <span class="diffaddedchars" style="background-color:#ddfade;">-</span> <span class="diffcontext"><br>*</span> <span class="diffaddedchars" style="background-color:#ddfade;"> -</span> <span class="diffcontext"> must be invoked after {{Bootstrap.endInitialization()}} and after all EE components which support injection are installed (i.e. relevant {{ProcessInjectionTarget}} was fired)</span> <span class="diffaddedchars" style="background-color:#ddfade;">-</span> <span class="diffcontext"><br>*</span> <span class="diffaddedchars" style="background-color:#ddfade;"> -</span> <span class="diffcontext"> attempts to optimize stored metadata to save memory</span> <span class="diffaddedchars" style="background-color:#ddfade;">-<br><br>See also {{[ConfigurationKey#ALLOW_OPTIMIZED_CLEANUP|https://github.com/weld/core/blob/master/impl/src/main/java/org/jboss/weld/config/ConfigurationKey.java#L272]}}.</span> </td> 
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