[drools-user] Custom ClassLoader

[Lukas Fuellemann]

Hi,

Because I have to exchange classes at runtime, I want to use my own class 
loader together with drools.
I modified RuleSetCompiler to use "smf-classLoader" from RuleBaseContext and 
also tell RuleSetLoader to use that class loader.
The problem is now JCI, which uses its own class loader.

The relevant code in RuleSetCompiler.compile():

ResourceStoreClassLoader classLoader = new ResourceStoreClassLoader( 
parentClassLoader,
    new ResourceStore[]{dst} );

The debug output shows that parentClassLoader really is my own class loader. 
This means, the ResourceStorClassLoader uses my class loader as 
parentClassLoader.

The problem: JCI does never use my class loader and therefore cannot resolve 
the classes declared in the parameters of my rules.

I use this code in my main class:

      RuleBaseContext context = new RuleBaseContext();
      context.put("smf-classLoader", classLoader);

      RuleSetLoader ruleSetLoader = new RuleSetLoader();
      ruleSetLoader.addFromReader(new StringReader(rules), context);

      RuleBaseLoader ruleBaseLoader = new RuleBaseLoader();
      ruleBaseLoader.addFromRuleSetLoader(ruleSetLoader);
      ruleBase = ruleBaseLoader.buildRuleBase();

Can anybody help me?

Thanks in advance,
Lukas Fuellemann