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am using Drools 5.x (drools-compiler 5.2.1.Final, drools-decisiontables 5.4.0.Final, and drools-templates 5.4.0.Final; jbpm-flow 5.1.1.Final, jbpm-bmpn2 5.1.1.Final and with their respective dependencies) for my Java job, I build/run it with Java 1.7.0_21. My current set up works properly. I am using a decision table (spreadsheet).

I am able to build/run my project with Java 1.8.0_162 using drools 5.x as described above; however, when the java job runs it loads the decision table (spreadsheet) but it does not fire up any of the rules, I am not getting an exception in the last line that gets executed:

Java
Properties props = new Properties();
    
    KnowledgeBuilderConfiguration configuration = KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(props);
    
    KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newDecisionTableConfiguration(configuration);
    
    DecisionTableConfiguration config = KnowledgeBuilderFactory.newDecisionTableConfiguration();
    
    config.setInputType(DecisionTableInputType.XLS);
    
    kbuilder.add(ResourceFactory.newClassPathResource(spreadsheetFile), ResourcType.DTABLE, config);  // last line executed and then job exists and completes successfully.

Prior to the last line getting executed I put some debug logs and they show the following:

>> Properties (props):  {}

>> KnowledgeBuilderConfiguration (configuration): org.drools.compiler.PackageBuilderConfiguration@630cb4a4

>> KnowledgeBuilder (kbuilder):  org.drools.builder.impl.KnowledgeBuilderImpl@239bof9d

>> ResourceFactory.newClassPathResource(spreadsheetFile):  [ClassPathResource path='spreadsheet.xls']

>> ResourceType.DTABLE:  ResourceType = 'Decision Table'

>> DecisionTableConfiguration (config):  org.drools.builder.conf.impl.DecisionTableConfigurationImpl@150ab4ed

>> DecisionTableConfiguration (config.getInputType()):  XLS




So I decided to upgrade from drools 5.5.0 to 7.5.0 and use kie-api/kie-ci; I had to do some refactoring because now drools is part of the KIE (Knowledge Is Everything) umbrella, see the code below:

Java
KieServices ks = KieServices.Factory.get();
KieContainer kc = ks.getKieClasspathContainer();
KieSession ks = kc.newKieSession("ksession-dtables");  //stateful session
FactHandle fh = ks.insert(fact);
ks.fireAllRules();


....

The packages and rules are loaded into the Knowledge Base but only the first rules fire up and then it stops, do I need to upgrade my decision table (spreadsheet) in order to work for drools 7.5.0 with Java 8?



Any suggestions are welcome.



Thanks!!

What I have tried:

Figuring out if I need to modify my decision table (spreadsheet) and debug the code to find the culprit.
Posted
Updated 3-Aug-20 9:36am
v2

I used drools 6.5.0 and everything seems to work properly. It seems like drools 7.0.0 and higher use a different decision table (spreadsheet) format.
 
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I worked on Drools on 2012 and again working on it now with 7 version.
Seems like Im able to make it work with this code

private void getKieRepository() {
if(kieServices == null) {
kieServices = KieServices.Factory.get();
}
final KieRepository kieRepository = kieServices.getRepository();
kieRepository.addKieModule(new KieModule() {
public ReleaseId getReleaseId() {
return kieRepository.getDefaultReleaseId();
}
});
}

@Bean
public KieSession getKieSession() {
System.setProperty("drools.dateformat","MMddyyyy");
getKieRepository();
generateDrl();
KieFileSystem kieFileSystem = kieServices.newKieFileSystem();
kieFileSystem.write(ResourceFactory.newClassPathResource(RULES_PATH + "rules.xlsx"));
KieBuilder kb = kieServices.newKieBuilder(kieFileSystem);
kb.buildAll();
Results results = kb.getResults();
if(results.hasMessages(Message.Level.ERROR)) {
for(Message message : results.getMessages()) {
System.out.println(message.getText());
}
throw new IllegalStateException("###errrors###");
}
KieModule kieModule = kb.getKieModule();
KieContainer kContainer = kieServices.newKieContainer(kieServices.getRepository().getDefaultReleaseId());
KieSession kieSession = kContainer.newKieSession();
return kContainer.newKieSession();
}
 
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