[jboss-jira] [JBoss JIRA] (DROOLS-3277) KieScanner in Scala fat-jar application does not work due to Plexus configuration

[Mario Fusco (Jira)]

     [ https://issues.redhat.com/browse/DROOLS-3277?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco resolved DROOLS-3277.
---------------------------------
    Resolution: Explained


See https://docs.jboss.org/drools/release/7.25.0.Final/drools-docs/html_single/#_building_and_running_drools_in_a_fat_jar

> KieScanner in Scala fat-jar application does not work due to Plexus configuration
> ---------------------------------------------------------------------------------
>
>                 Key: DROOLS-3277
>                 URL: https://issues.redhat.com/browse/DROOLS-3277
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>    Affects Versions: 7.13.0.Final
>            Reporter: Michael Reynolds
>            Assignee: Mario Fusco
>            Priority: Major
>         Attachments: components.xml, out.log
>
>
> The configuration required for all the KIE related components wired together with Sisu and in Plexus is spread out among many files with the same name/location in various library jars.
> The SBT assembly plugin is the standard for building a Scala fat-jar application. When it multiple versions of the same file when squashing the jars together it attempts to apply a merge strategy to them. For the Sisu configuration, it is simple enough to apply a "concat" merge strategy. However, the META-INF/plexus/components.xml cannot be automatically merged. Unless all the elements are present, various component lookups will fail when using the KieScanner.
> I've provided the following attachments related to this case:
> ||File||Description||
> |out.log|Output of starting the fat-jar application without properly merging the Sisu and Plexus configuration files|
> |components.xml|The merged components.xml file I created that resolves this issue.|



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