Drools ksession.insert error when using Fact object











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I am planning to create a dynamic object based on the JSON payload using FactTemplate instead of using POJO but I'm getting an error when inserting Fact org.drools.core.facttemplates.Fact in knowledge base.




java.lang.NullPointerException at
org.drools.core.phreak.PropagationEntry$Insert.execute(PropagationEntry.java:134)
at
org.drools.reteoo.common.RetePropagationList.addEntry(RetePropagationList.java:36)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.addPropagation(StatefulKnowledgeSessionImpl.java:2095)
at
org.drools.reteoo.common.ReteWorkingMemory.addPropagation(ReteWorkingMemory.java:238)
at
org.drools.core.reteoo.EntryPointNode.assertObject(EntryPointNode.java:225)
at
org.drools.core.common.NamedEntryPoint.insert(NamedEntryPoint.java:278)
at
org.drools.core.common.NamedEntryPoint.insert(NamedEntryPoint.java:239)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:1535)
at
org.drools.reteoo.common.ReteWorkingMemory.insert(ReteWorkingMemory.java:285)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:1481)
at
org.drools.impl.adapters.KnowledgeRuntimeAdapter.insert(KnowledgeRuntimeAdapter.java:263)
at com.pexa.au.DroolsMain.main(DroolsMain.java:100)




Here is my code:



InternalKnowledgePackage pkg = new KnowledgePackageImpl("test");

final FieldTemplate ft = new FieldTemplateImpl( "person",

                0,

                String.class );



final FieldTemplate fields1 = new FieldTemplate{ft};



final FactTemplate factTemplate = new FactTemplateImpl( pkg,

                "PersonDetails",

                fields1 );





 final Fact personFact = factTemplate.createFact( 10 );

 personFact.setFieldValue( "person",

       "NAMEE!!" );



 ksession.insert(personFact);



 ksession.fireAllRules();


Any suggestions will be highly appreciated! :)






java drools







share|improve this question
























  • I've found the Type Declaration best suits for my scenario rather than using FactTemplate.
    – james leeroy Dator
    23 hours ago















up vote
0
down vote

favorite












I am planning to create a dynamic object based on the JSON payload using FactTemplate instead of using POJO but I'm getting an error when inserting Fact org.drools.core.facttemplates.Fact in knowledge base.




java.lang.NullPointerException at
org.drools.core.phreak.PropagationEntry$Insert.execute(PropagationEntry.java:134)
at
org.drools.reteoo.common.RetePropagationList.addEntry(RetePropagationList.java:36)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.addPropagation(StatefulKnowledgeSessionImpl.java:2095)
at
org.drools.reteoo.common.ReteWorkingMemory.addPropagation(ReteWorkingMemory.java:238)
at
org.drools.core.reteoo.EntryPointNode.assertObject(EntryPointNode.java:225)
at
org.drools.core.common.NamedEntryPoint.insert(NamedEntryPoint.java:278)
at
org.drools.core.common.NamedEntryPoint.insert(NamedEntryPoint.java:239)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:1535)
at
org.drools.reteoo.common.ReteWorkingMemory.insert(ReteWorkingMemory.java:285)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:1481)
at
org.drools.impl.adapters.KnowledgeRuntimeAdapter.insert(KnowledgeRuntimeAdapter.java:263)
at com.pexa.au.DroolsMain.main(DroolsMain.java:100)




Here is my code:



InternalKnowledgePackage pkg = new KnowledgePackageImpl("test");

final FieldTemplate ft = new FieldTemplateImpl( "person",

                0,

                String.class );



final FieldTemplate fields1 = new FieldTemplate{ft};



final FactTemplate factTemplate = new FactTemplateImpl( pkg,

                "PersonDetails",

                fields1 );





 final Fact personFact = factTemplate.createFact( 10 );

 personFact.setFieldValue( "person",

       "NAMEE!!" );



 ksession.insert(personFact);



 ksession.fireAllRules();


Any suggestions will be highly appreciated! :)






java drools







share|improve this question
























  • I've found the Type Declaration best suits for my scenario rather than using FactTemplate.
    – james leeroy Dator
    23 hours ago













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I am planning to create a dynamic object based on the JSON payload using FactTemplate instead of using POJO but I'm getting an error when inserting Fact org.drools.core.facttemplates.Fact in knowledge base.




java.lang.NullPointerException at
org.drools.core.phreak.PropagationEntry$Insert.execute(PropagationEntry.java:134)
at
org.drools.reteoo.common.RetePropagationList.addEntry(RetePropagationList.java:36)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.addPropagation(StatefulKnowledgeSessionImpl.java:2095)
at
org.drools.reteoo.common.ReteWorkingMemory.addPropagation(ReteWorkingMemory.java:238)
at
org.drools.core.reteoo.EntryPointNode.assertObject(EntryPointNode.java:225)
at
org.drools.core.common.NamedEntryPoint.insert(NamedEntryPoint.java:278)
at
org.drools.core.common.NamedEntryPoint.insert(NamedEntryPoint.java:239)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:1535)
at
org.drools.reteoo.common.ReteWorkingMemory.insert(ReteWorkingMemory.java:285)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:1481)
at
org.drools.impl.adapters.KnowledgeRuntimeAdapter.insert(KnowledgeRuntimeAdapter.java:263)
at com.pexa.au.DroolsMain.main(DroolsMain.java:100)




Here is my code:



InternalKnowledgePackage pkg = new KnowledgePackageImpl("test");

final FieldTemplate ft = new FieldTemplateImpl( "person",

                0,

                String.class );



final FieldTemplate fields1 = new FieldTemplate{ft};



final FactTemplate factTemplate = new FactTemplateImpl( pkg,

                "PersonDetails",

                fields1 );





 final Fact personFact = factTemplate.createFact( 10 );

 personFact.setFieldValue( "person",

       "NAMEE!!" );



 ksession.insert(personFact);



 ksession.fireAllRules();


Any suggestions will be highly appreciated! :)






java drools







share|improve this question















I am planning to create a dynamic object based on the JSON payload using FactTemplate instead of using POJO but I'm getting an error when inserting Fact org.drools.core.facttemplates.Fact in knowledge base.




java.lang.NullPointerException at
org.drools.core.phreak.PropagationEntry$Insert.execute(PropagationEntry.java:134)
at
org.drools.reteoo.common.RetePropagationList.addEntry(RetePropagationList.java:36)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.addPropagation(StatefulKnowledgeSessionImpl.java:2095)
at
org.drools.reteoo.common.ReteWorkingMemory.addPropagation(ReteWorkingMemory.java:238)
at
org.drools.core.reteoo.EntryPointNode.assertObject(EntryPointNode.java:225)
at
org.drools.core.common.NamedEntryPoint.insert(NamedEntryPoint.java:278)
at
org.drools.core.common.NamedEntryPoint.insert(NamedEntryPoint.java:239)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:1535)
at
org.drools.reteoo.common.ReteWorkingMemory.insert(ReteWorkingMemory.java:285)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:1481)
at
org.drools.impl.adapters.KnowledgeRuntimeAdapter.insert(KnowledgeRuntimeAdapter.java:263)
at com.pexa.au.DroolsMain.main(DroolsMain.java:100)




Here is my code:



InternalKnowledgePackage pkg = new KnowledgePackageImpl("test");

final FieldTemplate ft = new FieldTemplateImpl( "person",

                0,

                String.class );



final FieldTemplate fields1 = new FieldTemplate{ft};



final FactTemplate factTemplate = new FactTemplateImpl( pkg,

                "PersonDetails",

                fields1 );





 final Fact personFact = factTemplate.createFact( 10 );

 personFact.setFieldValue( "person",

       "NAMEE!!" );



 ksession.insert(personFact);



 ksession.fireAllRules();


Any suggestions will be highly appreciated! :)






java drools




java drools






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 2 days ago

























asked 2 days ago









james leeroy Dator

308




308












  • I've found the Type Declaration best suits for my scenario rather than using FactTemplate.
    – james leeroy Dator
    23 hours ago


















  • I've found the Type Declaration best suits for my scenario rather than using FactTemplate.
    – james leeroy Dator
    23 hours ago
















I've found the Type Declaration best suits for my scenario rather than using FactTemplate.
– james leeroy Dator
23 hours ago




I've found the Type Declaration best suits for my scenario rather than using FactTemplate.
– james leeroy Dator
23 hours ago

















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