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Appendix A. Additional Notes

  • The Oracle WebLogic Server class-loading mechanism does not provide access to the application JARs located in you application’s WEB-INF/lib directory, which can cause problems when looking to inject KIE-CDI classes. As a workaround, Red Hat JBoss BRMS includes a CDI extension that temporarily swaps class loaders to load the application: org.kie.workbench.backend.weblogic.SwapClassloaderExtension.

    Enabling CDI Extension workaround

    • Get the extension’s class file either by using the pre-compiled SwapClassloaderExtension.class file found in Business Central’s business-central.war/WEB-INF/classes/org/kie/workbench/backend/weblogic/ subdirectory, or by downloading and compiling its source. Put the file in your application’s /WEB-INF/classes/org/kie/workbench/backend/weblogic/ directory.

    • Enable the extension by putting its fully qualified name in the WEB-INF/classes/META-INF/services/javax.enterprise.inject.spi.Extension file in your application. If the file does not exist, create it.

      Contents of javax.enterprise.inject.spi.Extension

      org.kie.workbench.backend.weblogic.SwapClassloaderExtension

    Note

    When using Business Central, these steps are not necessary—​the workaround has already been applied.

  • If using a non-exploded archive, Weblogic packs contents of Business Central’s WEB-INF/classes into WEB-INF/lib/_wl_cls_gen.jar. If a developer aims to create KieBase and KieSession from resources, KIE-Spring cannot find the classes. For this reason, the recommended deployment method is to use the exploded archives contained within the product’s ZIP file.
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