Examples of org.drools.KnowledgeBaseConfiguration

org.drools.KnowledgeBaseConfiguration
A class to store KnowledgeBase related configuration. It must be used at KnowledgeBase instantiation time or not used at all.

This class will automatically load default values from a number of places, accumulating properties from each location. This list of locations, in given priority is: System properties, home directory, working directory, META-INF/ of optionally provided classLoader META-INF/ of Thread.currentThread().getContextClassLoader() and META-INF/ of ClassLoader.getSystemClassLoader()

So if you want to set a default configuration value for all your new KnowledgeBase, you can simply set the property as a System property.

After the KnowledgeBase is created, it makes the configuration immutable and there is no way to make it mutable again. This is to avoid inconsistent behaviour inside KnowledgeBase.

The following properties are supported:
- drools.maintainTms = <true|false>
- drools.assertBehaviour = <identity|equality>
- drools.logicalOverride = <discard|preserve>
- drools.sequential = <true|false>
- drools.sequential.agenda = <sequential|dynamic>
- drools.removeIdentities = <true|false>
- drools.shareAlphaNodes = <true|false>
- drools.shareBetaNodes = <true|false>
- drools.alphaNodeHashingThreshold = <1...n>
- drools.compositeKeyDepth = <1..3>
- drools.indexLeftBetaMemory = <true/false>
- drools.indexRightBetaMemory = <true/false>
- drools.consequenceExceptionHandler = <qualified class name>
- drools.maxThreads = <-1|1..n>
- drools.multithreadEvaluation = <true|false>
The follow properties have not yet been migrated from the Drools 4.0 api:
- drools.executorService = <qualified class name>
- drools.conflictResolver = <qualified class name>
- drools.ruleBaseUpdateHandler = <qualified class name>

                "    not Event( )\n" +
                "then\n" +
                "    drools.halt();\n" +
                "end\n";


        KnowledgeBaseConfiguration kBaseConfig = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
        kBaseConfig.setOption(EventProcessingOption.STREAM);
        KnowledgeBase kbase = loadKnowledgeBaseFromString(kBaseConfig, str);
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();


        FactType eventType = kbase.getFactType("org.drools.test", "Event");

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import org.junit.Test;


public class FactHandleMarshallingTest {


    private RuleBase createRuleBase() { 
        KnowledgeBaseConfiguration config = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
        config.setOption( EventProcessingOption.STREAM );
        KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase( config );
        RuleBase ruleBase = ((KnowledgeBaseImpl) kbase).getRuleBase();
        return ruleBase;
    }

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        kbuilder.add( ResourceFactory.newReaderResource( new StringReader( str ) ),
                      ResourceType.DRL );
        if ( kbuilder.hasErrors() ) {
            throw new RuntimeException( kbuilder.getErrors().toString() );
        }
        KnowledgeBaseConfiguration config = KnowledgeBaseFactory
                .newKnowledgeBaseConfiguration();
        config.setOption( EventProcessingOption.STREAM );
        KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase( config );
        knowledgeBase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
        StatefulKnowledgeSession ksession = knowledgeBase.newStatefulKnowledgeSession();
        ksession.insert( new A() );
        MarshallerFactory.newMarshaller( knowledgeBase ).marshall( new ByteArrayOutputStream(), ksession );

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        kbuilder.add( ResourceFactory.newReaderResource( new StringReader( str ) ),
                      ResourceType.DRL );
        if ( kbuilder.hasErrors() ) {
            throw new RuntimeException( kbuilder.getErrors().toString() );
        }
        KnowledgeBaseConfiguration config = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
        config.setOption( EventProcessingOption.STREAM );
        KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase( config );
        knowledgeBase.addKnowledgePackages( kbuilder.getKnowledgePackages() );


        KnowledgeSessionConfiguration ksconf = KnowledgeBaseFactory.newKnowledgeSessionConfiguration();
        ksconf.setOption( ClockTypeOption.get( "pseudo" ) );

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                      ResourceType.DRL );
        if ( kbuilder.hasErrors() ) {
            throw new RuntimeException( kbuilder.getErrors().toString() );
        }


        KnowledgeBaseConfiguration config = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
        config.setOption( EventProcessingOption.STREAM );
        KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase( config );
        knowledgeBase.addKnowledgePackages( kbuilder.getKnowledgePackages() );


        KnowledgeSessionConfiguration ksconf = KnowledgeBaseFactory.newKnowledgeSessionConfiguration();
        ksconf.setOption( ClockTypeOption.get( "pseudo" ) );

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                      ResourceType.DRL );
        if ( kbuilder.hasErrors() ) {
            throw new RuntimeException( kbuilder.getErrors().toString() );
        }


        KnowledgeBaseConfiguration config = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
        config.setOption( EventProcessingOption.STREAM );
        KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase( config );
        knowledgeBase.addKnowledgePackages( kbuilder.getKnowledgePackages() );


        KnowledgeSessionConfiguration ksconf = KnowledgeBaseFactory.newKnowledgeSessionConfiguration();
        ksconf.setOption( ClockTypeOption.get( "pseudo" ) );

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                      ResourceType.DRL );
        if ( kbuilder.hasErrors() ) {
            throw new RuntimeException( kbuilder.getErrors().toString() );
        }


        KnowledgeBaseConfiguration config = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
        config.setOption( EventProcessingOption.STREAM );
        KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase( config );
        knowledgeBase.addKnowledgePackages( kbuilder.getKnowledgePackages() );


        KnowledgeSessionConfiguration ksconf = KnowledgeBaseFactory.newKnowledgeSessionConfiguration();
        ksconf.setOption( ClockTypeOption.get( "pseudo" ) );

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                      ResourceType.DRL );
        if ( kbuilder.hasErrors() ) {
            throw new RuntimeException( kbuilder.getErrors().toString() );
        }


        KnowledgeBaseConfiguration config = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
        config.setOption( EventProcessingOption.STREAM );
        KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase( config );
        knowledgeBase.addKnowledgePackages( kbuilder.getKnowledgePackages() );


        KnowledgeSessionConfiguration ksconf = KnowledgeBaseFactory.newKnowledgeSessionConfiguration();
        ksconf.setOption( ClockTypeOption.get( "pseudo" ) );

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        KnowledgeBuilder kb = KnowledgeBuilderFactory.newKnowledgeBuilder();
        kb.add( new ByteArrayResource( drl.getBytes() ), ResourceType.DRL );
        assertFalse( kb.hasErrors() );


        KnowledgeBaseConfiguration kbconf = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
        (( RuleBaseConfiguration) kbconf).setConflictResolver( SalienceConflictResolver.getInstance() );


        KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase( kbconf );
        knowledgeBase.addKnowledgePackages( kb.getKnowledgePackages() );
        StatefulKnowledgeSession knowledgeSession = knowledgeBase.newStatefulKnowledgeSession();

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        str += "     forall ( $a : Activation( department == 'sales' ) Activation( this == $a, active == false ) ) \n";
        str += "then \n";
        str += "    list.add( kcontext.rule.name + ':' + $s ); \n";
        str += "end \n";


        KnowledgeBaseConfiguration kconf = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
        kconf.setOption( DeclarativeAgendaOption.ENABLED );
        KnowledgeBase kbase = loadKnowledgeBaseFromString( kconf, str );
        StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
        List list = new ArrayList();
        ksession.setGlobal( "list",
                            list );

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