JAR in a WAR Classloading a .class from the WARs web-inf/class

Question

A little backround on my environment:
I have a jar that contains some common functionality (common.jar) that is shared among all my web apps. There is a scheduler function in the JAR that queries the applications datasource for schedules to run. Each schedule contains a class that implements the interface ScheduleCommand and has an execute method. The ScheduleManager get the list of schedules from the db and uses a classloader to load the schedule command and call the execute method.
ScheduleCommand cmd = (ScheduleCommand) Class.forName(scheduleCommands.getClassName()).newInstance();
The issue:
I have some common schedule command in the common.jar like clean temp folder, monitor memory, etc. I also want to be able to include additional schedule commands in the WAR that are unique to that web app.
WAR
--web-inf
----classes
------CustomScheduleCommand.class
----lib
------common.jar
When I do this however the ScheduleManager in the common.jar is not able to find the CustomScheduleCommand.class in the WAR�s web-inf/classes. Do I need to use a different classloader or do I need to add a classpath to the manifest of the WAR?

Answer 1

Hi Michael,
there are diffrent options to do this, depending on whats needs to be achieved.
a) Easiest way (but only possible, if no action has to go back to your template): Create an RRI-Jump-Target to your ABAP report
b) Also only possible when no additional interaction on your template has to take place: Create a bsp and call the bsp when clicking on the button. Advantage in comparison to a) you could get a new window with for example a sucess or error message
c) Use an own helpservice class. Now this as you have seen can get more complex, as interaction with your webtemplate can take place. In principal you need to create a class inherit from cl_rsr_www_help_window and overwrite the process_cmd method. Now you can paste your coding inside and you are finished (when you register the help service class to a web item).
Heike