[rules-users] Null pointer exception when adding drools to existing project

[Mark Proctor]

There is no ksession called “ksession-rules”, or it can’t find one. Which means your kmodule.xml is incorrectly defined, or cannot be found.

Take the simplest project, copy it. And use that as a starting point, changing the drl files to have the rule content you want and adding your domain classes.
Either this one:
https://github.com/droolsjbpm/drools/tree/master/drools-examples-api/default-kiesession

Or this one:
https://github.com/droolsjbpm/drools/tree/master/drools-examples-api/named-kiesession

Mark
On 31 Jan 2014, at 02:11, kashili <kashili at yahoo.com> wrote:

> I infact looked at the docs and examples and could not reach to conclusion
> (because they are aimed at getting started and api details). None of them
> show how to convert an existing project into drools (there were bits and
> pieces there, which I believe I covered in my question). I did look at my
> project under properties->java build path ->libraries and I see drools
> library with almost 20 files there; so I am thinking the problem is not
> classpath related (may be related to directory structure or kmodule.xml is
> not linking the class files with rules file correctly). I am newbie to
> drools..
> 
> 
> 
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