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tim-schwalbe-NZ
November 15, 2017
Solved

Problem using Rome for RSS

  • November 15, 2017
  • 6 replies
  • 2688 views

Hello guys,

I ran into a problem using the rome library for creating RSS Feeds. https://rometools.github.io/

If I just add the lib to my pom.xml and deploy it to an AEM instance and call a servlet which should use the library it just fails. Iam unable to debug into the servlet.

I think it is a class loading issue and on the website of the rome tools is a hint to set the system property 'rome.pluginmanager.useloadclass' to true. How can I achieve this? just as startup parameter or is there a way to do in inside apache felix console or another place inside AEM?

In the error log i got the following message:

failure loooking up method bindRssFeed(org.osgi.framework.ServiceReference) in class class com.xxx.aem.relaunch.servlets.rssfeed.RssFeedServlet. Assuming no such method. (java.lang.NoClassDefFoundError: com/rometools/rome/io/FeedException)

java.lang.NoClassDefFoundError: com/rometools/rome/io/FeedException

at java.lang.Class.getDeclaredMethods0(Native Method)

at java.lang.Class.privateGetDeclaredMethods(Unknown Source)

at java.lang.Class.getDeclaredMethod(Unknown Source)

at org.apache.felix.scr.impl.helper.BaseMethod.getMethod(BaseMethod.java:316)

at org.apache.felix.scr.impl.helper.BindMethod.getServiceReferenceMethod(BindMethod.java:392)

at org.apache.felix.scr.impl.helper.BindMethod.doFindMethod(BindMethod.java:113)

at org.apache.felix.scr.impl.helper.BaseMethod.findMethod(BaseMethod.java:171)

at org.apache.felix.scr.impl.helper.BaseMethod.access$400(BaseMethod.java:37)

at org.apache.felix.scr.impl.helper.BaseMethod$NotResolved.resolve(BaseMethod.java:558)

at org.apache.felix.scr.impl.helper.BaseMethod$NotResolved.methodExists(BaseMethod.java:580)

at org.apache.felix.scr.impl.helper.BaseMethod.methodExists(BaseMethod.java:513)

at org.apache.felix.scr.impl.helper.BindMethod.getServiceObject(BindMethod.java:643)

at org.apache.felix.scr.impl.manager.DependencyManager.getServiceObject(DependencyManager.java:2137)

at org.apache.felix.scr.impl.manager.DependencyManager$SingleStaticCustomizer.prebind(DependencyManager.java:1048)

at org.apache.felix.scr.impl.manager.DependencyManager.prebind(DependencyManager.java:1457)

at org.apache.felix.scr.impl.manager.AbstractComponentManager.collectDependencies(AbstractComponentManager.java:983)

at org.apache.felix.scr.impl.manager.SingleComponentManager.getServiceInternal(SingleComponentManager.java:812)

at org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:774)

at org.apache.felix.framework.ServiceRegistrationImpl.getFactoryUnchecked(ServiceRegistrationImpl.java:347)

at org.apache.felix.framework.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:247)

at org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:344)

at org.apache.felix.framework.Felix.getService(Felix.java:3699)

at org.apache.felix.framework.BundleContextImpl.getService(BundleContextImpl.java:470)

at org.apache.felix.scr.impl.manager.SingleRefPair.getServiceObject(SingleRefPair.java:72)

at org.apache.felix.scr.impl.manager.DependencyManager.getService(DependencyManager.java:1396)

at org.apache.felix.scr.impl.manager.DependencyManager.getService(DependencyManager.java:1370)

at org.apache.felix.scr.impl.manager.ComponentContextImpl.locateService(ComponentContextImpl.java:135)

at org.apache.sling.servlets.resolver.internal.SlingServletResolver.createServlet(SlingServletResolver.java:979)

at org.apache.sling.servlets.resolver.internal.SlingServletResolver.bindServlet(SlingServletResolver.java:941)

at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.apache.felix.scr.impl.helper.BaseMethod.invokeMethod(BaseMethod.java:222)

at org.apache.felix.scr.impl.helper.BaseMethod.access$500(BaseMethod.java:37)

at org.apache.felix.scr.impl.helper.BaseMethod$Resolved.invoke(BaseMethod.java:615)

at org.apache.felix.scr.impl.helper.BaseMethod.invoke(BaseMethod.java:499)

at org.apache.felix.scr.impl.helper.BindMethod.invoke(BindMethod.java:41)

at org.apache.felix.scr.impl.manager.DependencyManager.doInvokeBindMethod(DependencyManager.java:1660)

at org.apache.felix.scr.impl.manager.DependencyManager.invokeBindMethod(DependencyManager.java:1636)

at org.apache.felix.scr.impl.manager.SingleComponentManager.invokeBindMethod(SingleComponentManager.java:370)

at org.apache.felix.scr.impl.manager.DependencyManager$MultipleDynamicCustomizer.addedService(DependencyManager.java:319)

at org.apache.felix.scr.impl.manager.DependencyManager$MultipleDynamicCustomizer.addedService(DependencyManager.java:295)

at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1215)

at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1136)

at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.trackAdding(ServiceTracker.java:945)

at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.track(ServiceTracker.java:881)

at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:1167)

at org.apache.felix.scr.impl.BundleComponentActivator$ListenerInfo.serviceChanged(BundleComponentActivator.java:120)

at org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:991)

at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:839)

at org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:546)

at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4557)

at org.apache.felix.framework.Felix.registerService(Felix.java:3549)

at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:348)

at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:869)

at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:857)

at org.apache.felix.scr.impl.manager.RegistrationManager.changeRegistration(RegistrationManager.java:133)

at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:915)

at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:715)

at org.apache.felix.scr.impl.manager.DependencyManager$SingleStaticCustomizer.addedService(DependencyManager.java:954)

at org.apache.felix.scr.impl.manager.DependencyManager$SingleStaticCustomizer.addedService(DependencyManager.java:915)

at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1215)

at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.java:1136)

at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.trackAdding(ServiceTracker.java:945)

at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.track(ServiceTracker.java:881)

at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:1167)

at org.apache.felix.scr.impl.BundleComponentActivator$ListenerInfo.serviceChanged(BundleComponentActivator.java:120)

at org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:991)

at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:839)

at org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:546)

at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4557)

at org.apache.felix.framework.Felix.registerService(Felix.java:3549)

at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:348)

at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:869)

at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:857)

at org.apache.felix.scr.impl.manager.RegistrationManager.changeRegistration(RegistrationManager.java:133)

at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:915)

at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:715)

at org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManager.java:399)

at org.apache.felix.scr.impl.config.ConfigurableComponentHolder.enableComponents(ConfigurableComponentHolder.java:676)

at org.apache.felix.scr.impl.BundleComponentActivator.initialEnable(BundleComponentActivator.java:339)

at org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:360)

at org.apache.felix.scr.impl.Activator.access$000(Activator.java:53)

at org.apache.felix.scr.impl.Activator$ScrExtension.start(Activator.java:260)

at org.apache.felix.utils.extender.AbstractExtender.createExtension(AbstractExtender.java:259)

at org.apache.felix.utils.extender.AbstractExtender.modifiedBundle(AbstractExtender.java:232)

at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:482)

at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:415)

at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:232)

at org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:444)

at org.apache.felix.framework.util.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:916)

at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:835)

at org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:517)

at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4541)

at org.apache.felix.framework.Felix.startBundle(Felix.java:2172)

at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:998)

at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:984)

at org.apache.sling.installer.core.impl.tasks.BundleStartTask.execute(BundleStartTask.java:97)

at org.apache.sling.installer.core.impl.OsgiInstallerImpl.doExecuteTasks(OsgiInstallerImpl.java:894)

at org.apache.sling.installer.core.impl.OsgiInstallerImpl.executeTasks(OsgiInstallerImpl.java:729)

at org.apache.sling.installer.core.impl.OsgiInstallerImpl.run(OsgiInstallerImpl.java:286)

at java.lang.Thread.run(Unknown Source)

Caused by: java.lang.ClassNotFoundException: com.rometools.rome.io.FeedException not found by com.xxx.aem.xx-com-relaunch.core

    This post is no longer active and is closed to new replies. Need help? Start a new post to ask your question.
    Best answer by tim-schwalbe-NZ

    So thanks to everyone,

    I solved the issue by adding the following to my pom file. Is this the right way to do?

    <Embed-Dependency>

      rome,

      rome-utils,

      jdom2

    </Embed-Dependency>

    6 replies

    kautuk_sahni
    Community Manager
    kautuk_sahniCommunity Manager
    Community Manager
    November 15, 2017

    Just FYI.. Check this Adobe Experience Manager Help | Creating an Adobe Experience Manager RSS component

    Kautuk Sahni
    R
    ramesisv
    July 21, 2020
    Hi! Do you know where this link was moved to?
    smacdonald2008
    smacdonald2008
    November 15, 2017

    What is happening here is although you are referecning the lib in your POM file to build the OSGi bunlde - you need to ALSO place the JAR file into a OSGi bunlde and deploy. An OSGi bunlde in AEM needs to export this Java API.

    smacdonald2008
    smacdonald2008
    November 15, 2017

    Look how we wrapped the SIMPLE JSON file into an OSGi bundle in this article --

    Scott's Digital Community: Submitting Adobe Experience Manager form data to custom Sling Servlets

    YOu can also watch the Video.

    T
    tim-schwalbe-NZAuthorAccepted solution
    November 16, 2017

    So thanks to everyone,

    I solved the issue by adding the following to my pom file. Is this the right way to do?

    <Embed-Dependency>

      rome,

      rome-utils,

      jdom2

    </Embed-Dependency>

      smacdonald2008
      smacdonald2008
      November 16, 2017

      That is one way to satisfy the requirement to get the JARs into an OSGi bundle.

        R
        ramesisv
        July 21, 2020
        Hi! Did you ever get ROME to work in AEM? I am having a hard time and was wondering if you were able to do it and how you setup your POM files.
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