Hello everyone! I am sorry to reply to my own email but I would really like to know whether there is somebody who was able to get aspectj and load-time weaving running with Apache Karaf.
I am really stuck on this so any hint would be hihgly appreciated! Best Regards Martin Zukal From: Martin Zukal <[email protected]> Sent: Saturday, August 27, 2022 11:42 AM To: '[email protected]' <[email protected]> Subject: Aspectj in Apache Karaf 4.4.1 Hello everyone! I am trying to enable aspectj in Apache Karaf version 4.4.1 and I am unable to get it to work. I have a project based on Spring which I want to run in Apache Karaf. This project contains the aspects and includes the following lines in the configuration: <context:load-time-weaver aspectj-weaving="on" /> <aop:aspectj-autoproxy /> Which is why I need aspectj in the runtime. What I should probably also mention is that the project uses Gemini Blueprint version 3.0.0.M01 to publish the Spring services into the OSGi context. I was not able to find any recent tutorial how to enable aspects in Apache Karaf so I followed this blog post: http://dywicki.pl/2011/11/running-aspects-under-osgi-4-2-with-karaf/ and adapted the procedure slightly. What I did so far is: * Changed the framework from felix to equinox * Placed the three bundles (org.eclipse.equinox.weaving.aspectj, org.eclipse.equinox.weaving.caching and org.eclipse.equinox.weaving.hook) into the system directory * Added entries for the above mentioned bundles to startup.properties Apache karaf starts fine with the above described configuration and I can see all weaving bundles as active in the console (org.eclipse.equinox.weaving.hook is a fragment so there it says fragment). However, when I try to deploy the bundle with my Spring project I get the following exception: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.context.config.internalAspectJWeavingEnabler': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'loadTimeWeaver': Initialization of bean failed; nested exception is java.lang.IllegalStateException: ClassLoader [org.eclipse.gemini.blueprint.util.BundleDelegatingClassLoader] does NOT provide an 'addTransformer(ClassFileTransformer)' method. Specify a custom LoadTimeWeaver or start your Java virtual machine with Spring's agent: -javaagent:spring-instrument-{version}.jar I tried to start Apache Karaf with the -javaagent option but it did not help. I am coming from Eclipse Virgo and the aspects were working there quite fine. One of the settings which was needed to add was osgi.framework.extensions = org.eclipse.equinox.weaving.hook. Is there a possibility how to add this setting to Apache Karaf? Is there any recent tutorial how to get aspects working in Apache Karaf? I would really appreciate any help with this topic! Best Regards Martin Zukal
