[Building Sakai] Best supported Lessons version for Sakai 2.9.2?

[Daniel Merino]

Hi everybody.

 From a mail of Charles Hedrick, I have understood that Lessons 10.0 is 
supported by Sakai 2.9.2. I have built it without problems, but I have 
found an issue when restarting Tomcat:

     Exception in introspection java.lang.ClassNotFoundException: 
org.sakaiproject.util.api.LinkMigrationHelper
     loader org.apache.catalina.loader.StandardClassLoader at 48e29820

     2014-07-28 14:10:18,881 ERROR pool-2-thread-1 
org.springframework.web.context.ContextLoader - Context initialization 
failed
     org.springframework.beans.factory.BeanCreationException: Error 
creating bean with name 
'org.sakaiproject.lessonbuildertool.service.LessonBuilderAccessService' 
defined in ServletContext resource [/WEB-INF/applicationContext.xml]: 
Invocation of init method failed; nested exception is 
java.lang.AbstractMethodError: 
org.sakaiproject.lessonbuildertool.model.SimplePageToolDaoImpl.findProperty(Ljava/lang/String;)Lorg/sakaiproject/lessonbuildertool/SimplePageProperty;
         at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1338)
         at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
         at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)


It seems that is from this piece of code at 
tool/src/java/org/sakaiproject/lessonbuildertool/service/LessonBuilderEntityProducer.java 
:


       // LinkMigrationHelper is not present before 2.10. So this code 
can compile on older systems,
       // find it via introspection.

       try {
           linkMigrationHelper = 
RequestFilter.class.getClassLoader().loadClass("org.sakaiproject.util.api.LinkMigrationHelper");
           // this is in the kernel, so it should already be loaded
           linkMigrationHelperInstance = 
ComponentManager.get(linkMigrationHelper);
           if (linkMigrationHelper != null)
               migrateAllLinks = 
linkMigrationHelper.getMethod("migrateAllLinks", new Class[] { 
Set.class, String.class });
       } catch (Exception e) {
           System.out.println("Exception in introspection " + e);
           System.out.println("loader " + 
RequestFilter.class.getClassLoader());
       }


Is it possible to fix it without updating Kernel? Or I should try 
another Lessons version for 2.9.2?

Thanks in advance.
Best regards.
-- 
Daniel Merino Echeverría
daniel.merino at unavarra.es
Gestor de E-learning - Centro Superior de Innovación Educativa.
Tfno: 948-168489 - Universidad Pública de Navarra.