Drools - Ability to define rules at runtime?

Question

It is possible to define rules dynamically completely at runtime ? Also change the ruleset at runtime.

For example,

at time = t_1 the ruleset is { R1, R2, R3 } 
at time = t_2 the ruleset is { R1, R3, R4 } 
..... 

R1, R2 are rules that are defined at runtime.

Thanks.

Solution 1

Yes, Drools is completely dynamic. You can add/remove/replaces rules at runtime. All the existing sessions are automatically updated in order to keep consistency. Check the documentation/javadoc:

http://www.jboss.org/drools/documentation

And here you can see some integration tests:

DynamicRulesTest.java

Solution 2

Read the documentation and check out the tests about "KnowledeAgent" to see what you can do and how you can do it.

Comments

[bfrguci]

Is there a equivalent for Drools 7+ (I am using 7.27.0.Final). The code you point to uses internal classes/methods (KnowledgeBase and KnowledgeSession), while the KieBase class does not have a addPackage method.

[Liam Bohl]

Does anyone have the power to resurrect that lost file, DynamicRulesTest.java?

[DiegoAlfonso]

All the links from your answer are currently broken