[rules-users] Truth maintenance and RHS variables

[juankera]

Ok, i was working on cleaning the code and i've found the reason (now it will
be great to understand why :))

As i'm working with code from an open source platform, i have these lines in
my example:

KnowledgeAgentConfiguration aconf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
aconf.setProperty("drools.agent.newInstance", "false");

When i remove the second line, it works (i can see the "not working" rule
firing). When i put it back, the "not working" rule is not fired.

I've read that this property is related to new instances of KnowledgeBase
when resources changes... 

c&p from:
http://grepcode.com/file/repository.jboss.org/maven2/org.drools/drools-api/5.0.0.M4/org/drools/agent/KnowledgeAgentFactory.java

/aconf.setProperty( "drools.agent.newInstance",
                          "true" ); // resource changes results in a new
instance of the KnowledgeBase being built, 
                                    // this cannot currently be set to false
for incremental building/

So, why is this property changing the behaviour of the rules?

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