2013年11月13日 · Steve's answer is solid, but the major changes brought in drools 6 make the code obsolete. I am posting below a rewrite of Steve's code which takes into account the new api:

2013年11月18日 · As 'salaboy' mentions in his answer, coming soon as part of Drools 6, there is Drools Workbench. This is a major re-working of Guvnor. The following blog post lets you know what to expect:

Once you get into the business of storing multiple version of rules in a data store you are really looking for the Business Rule Management (BRMS) features of Guvnor (in Drools 5.x) or the Drools-WB/KIE-WB workbenches in Drools 6.0. Those solutions have solved for versioning, storage, and deployment of multiple rule versions out of the box.

2012年2月24日 · 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. –

It does work, i.e., the rule is correct, tested using Drools 5.5.0. - Can you write a Java program that accesses a Room object created as shown and where room.getTags().contains( "protocol" ) returns true? –

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2020年7月11日 · Drools optimizes the checking of conditions on the LHS, but executes the consequences on the RHS as-is. So by moving conditions to the RHS, you are causing your rules to be less performant because you're bypassing the optimization Drools provides. The correct way would be -- as you probably figured out -- to have two rules like follows. (Since ...

2011年2月4日 · and I want to transform it into rules in Drools Expert. The use of insertLogical has been proposed. Drools documentation says this about insertLogical: insertLogical(new Something()); is similar to insert, but the object will be automatically retracted when there are no more facts to support the truth of the currently firing rule.

2018年9月10日 · Anyway, this works because Drools evaluates all of the left hand side conditions in order to decide whether the rule should be triggered. So if we look at our example rule, it checks that there exists a Detail inside of Organization that meets our condition (has name of …

2016年6月17日 · The above condition is working fine. Now how do I add multiple boolean conditions in a rule? For eg. The above rule could be summarized as : a and b so if I want to create a rule : (a and b) or c then what would be actual drl syntax for it. I am new to drools so kindly help me with the syntax of the rule (a and b) or c. I did create a syntax