Drools 6 - 如何着火規則

我有麻煩解決了Drools 6.0.1.Final中的一條簡單規則。這是規則：Drools 6 - 如何着火規則

package org.drools.test 
rule "test rule" 
when 
    eval(true) 
then 
    System.out.println("success"); 
end

這是測試代碼，控制檯不不輸出success。

試驗1

// Create kie file system 
KieServices kieServices = KieServices.Factory.get(); 
KieFileSystem kfs = kieServices.newKieFileSystem(); 

// Add rule 
Resource resource = ResourceFactory.newByteArrayResource(src.getBytes()); 
kfs.write("org.drools.test.testrule.drl", resource); 
kieServices.newKieBuilder(kfs).buildAll(); 

// Create session 
KieContainer kieContainer = kieServices.newKieContainer(kieServices.getRepository().getDefaultReleaseId()); 
KieBaseConfiguration kbaseConf = KnowledgeBaseFactory.newKnowledgeBaseConfiguration(null, RuleBaseConfiguration.class.getClassLoader()); 
KieBase kieBase = kieContainer.newKieBase(kbaseConf); 
KieSession kieSession = kieBase.newKieSession(); 
kieSession.insert("Test object"); 

// Fire 
kieSession.fireAllRules(); 
kieSession.dispose();

相比之下，按預期運行下面的代碼段中，並在控制檯輸出success。問題是不建議使用方法newStatefulKnowledgeSession。據我所知，這不是做事情的Drools 6

測試2

Resource resource = ResourceFactory.newByteArrayResource(src.getBytes()); 
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); 
kbuilder.add(resource, ResourceType.DRL); 
StatefulKnowledgeSession ksession = kbuilder.newKnowledgeBase().newStatefulKnowledgeSession(); 
ksession.insert("Test object"); 
ksession.fireAllRules(); 
ksession.dispose();

調試信息

的方式我加了一些調試線，嘗試和理解測試1出了什麼問題。

kieSession.addEventListener(new DebugAgendaEventListener()); 
kieSession.addEventListener(new DebugRuleRuntimeEventListener());

的輸出是：

==>[ObjectInsertedEventImpl: getFactHandle()=[fact 0:1:1784206373:1217562221:1:DEFAULT:NON_TRAIT:Test object], getObject()=Test object, getKnowledgeRuntime()[email protected], getPropagationContext()=PhreakPropagationContext [entryPoint=EntryPoint::DEFAULT, factHandle=[fact 0:1:1784206373:1217562221:1:DEFAULT:NON_TRAIT:Test object], leftTuple=null, originOffset=-1, propagationNumber=2, rule=null, type=0]]

而在試驗2，輸出爲：

==>[ObjectInsertedEventImpl: getFactHandle()=[fact 0:1:1784206373:1217562221:1:DEFAULT:NON_TRAIT:Test object], getObject()=Test object, getKnowledgeRuntime()[email protected], getPropagationContext()=PhreakPropagationContext [entryPoint=EntryPoint::DEFAULT, factHandle=[fact 0:1:1784206373:1217562221:1:DEFAULT:NON_TRAIT:Test object], leftTuple=null, originOffset=-1, propagationNumber=2, rule=null, type=0]] 
==>[ActivationCreatedEvent: getActivation()=[[ test rule active=false ] [ null [fact 0:0:1771273200:1306428912:0:DEFAULT:NON_TRAIT:[email protected]] ] ], getKnowledgeRuntime()[email protected]] 
==>[BeforeActivationFiredEvent: getActivation()=[[ test rule active=false ] [ null [fact 0:0:1771273200:1306428912:0:DEFAULT:NON_TRAIT:[email protected]] ] ], getKnowledgeRuntime()[email protected]] 
success 
==>[AfterActivationFiredEvent: getActivation()=[[ test rule active=false ] [ null [fact 0:0:1771273200:1306428912:0:DEFAULT:NON_TRAIT:[email protected]] ] ], getKnowledgeRuntime()[email protected]]

底線

爲什麼試驗1沒有觸發規則，而測試2是？

來源

2015-01-12 Jonathan Hartnagel

如果您直接使用KieFileSystem，則必須確保內容反映所需的maven結構。所以，你應該寫：

kfs.write("src/main/resources/org.drools.test.testrule.drl", resource);

在可替代的，集資源上的SOURCEPATH，它直接寫：

resource.setSourcePath("org.drools.test.testrule.drl"); 
kfs.write(resource);

來源

2015-01-12 20:08:02

那不是幫助，如果火勢*方法，如果將知識拋出一個異常基地完全沒有規則？我相信我們也有類似的問題，即使在5.x – laune

感謝Davide，這個伎倆。 –

Drools 6 - 如何着火規則

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