Hi,

I have a simple rule (for a JUnit test) in a single ruleflow group, as configured in the BPNM:-

</businessRuleTask>

</endEvent>

</process>

When I run the rule it appears to enter the LHS but never RHS (unless I replace the LHS with eval(true)), even though the MiamiContext Fact is present and correct.

However, if I add another rule in the rule file that simply contains eval(true) in the LHS (and debug in the RHS), then my original rule fires correctly.

This can’t be correct but I cannot find a way to get it to work without the second rule.

Rules configured in other .drl files and ruleflows are working correctly (using the same Java code etc), so there must be something particular to this rule that is wrong … but I can’t see what!

Any help would be much appreciated.

I am using Drools 5.3.0

package uk.co.cdl.vis.miami.rules.miamicontext;

import uk.co.cdl.vis.miami.rules.RulesLogger;

import uk.co.cdl.vis.miami.model.MiamiContext;

import org.joda.time.DateTime;

dialect "mvel"

## Go-Live Date

#########################################################################################

rule "Increment GoLiveDate"

ruleflow-group "goLiveDateCheck"

when

$miamiContext : MiamiContext($date : goLiveDate )

then

RulesLogger.LOG.debug("*********** BEFORE:" + $miamiContext.goLiveDate);

$miamiContext.goLiveDate = $date.plusDays(1);

RulesLogger.LOG.debug("*********** AFTER:" + $miamiContext.goLiveDate);

end

## Without this rule the above rule does not work

rule "goLiveDateTEST"

ruleflow-group "goLiveDateCheck"

when

eval(true)

then

RulesLogger.LOG.debug("*********** goLiveDateTEST ***********");

end

The knowledge engine is run as follows and the startProcess is “liveDateStart”:-

public Collection<Object> executeRules(Collection<Object> facts) throws Exception {

KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();

kbuilder.add(ResourceFactory.newClassPathResource(changeSet), ResourceType.CHANGE_SET);

KnowledgeBase kbase = kbuilder.newKnowledgeBase();

StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();

new Slf4jWorkingMemoryLogger(ksession);

if (StringUtils.isNotBlank(startProcess)) {

ksession.startProcess(startProcess);

}

for (Object fact : facts) {

ksession.insert(fact);

}

ksession.fireAllRules(MAX_RULE_FIRES);

Collection<Object> resultFacts = ksession.getObjects();

ksession.dispose();

return resultFacts;

}

Log without 2^nd rule :-

2012-03-30 12:17:03,567 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE RULEFLOW STARTED process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,576 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE PROCESS NODE TRIGGERED node:StartProcess[id=1] process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,576 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE PROCESS NODE EXITED node:StartProcess[id=1] process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,577 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE PROCESS NODE TRIGGERED node:goLiveDateCheck[id=3] process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,580 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE RULEFLOW GROUP ACTIVATED group:goLiveDateCheck[size=0]

2012-03-30 12:17:03,580 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER RULEFLOW GROUP ACTIVATED group:goLiveDateCheck[size=0]

2012-03-30 12:17:03,580 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER PROCESS NODE TRIGGERED node:goLiveDateCheck[id=3] process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,580 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER PROCESS NODE TRIGGERED node:StartProcess[id=1] process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,581 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER PROCESS NODE TRIGGERED node:StartProcess[id=1] process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,581 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER RULEFLOW STARTED process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,583 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE RULEFLOW GROUP DEACTIVATED group:goLiveDateCheck[size=0]

2012-03-30 12:17:03,584 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER RULEFLOW GROUP DEACTIVATED group:goLiveDateCheck[size=0]

2012-03-30 12:17:03,584 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE PROCESS NODE EXITED node:goLiveDateCheck[id=3] process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,584 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE PROCESS NODE TRIGGERED node:EndProcess[id=4] process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,585 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE PROCESS NODE EXITED node:EndProcess[id=4] process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,585 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE RULEFLOW COMPLETED process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,585 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER RULEFLOW COMPLETED process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,586 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER PROCESS NODE TRIGGERED node:EndProcess[id=4] process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,586 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER PROCESS NODE TRIGGERED node:goLiveDateCheck[id=3] process:liveDateStart[id=liveDateStart]

2012-03-30 12:17:03,601 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) ACTIVATION CREATED rule:Increment GoLiveDate activationId:Increment GoLiveDate [1] declarations: $date=2012-03-02T10:21:05.000Z(1); $miamiContext=MiamiContext[goLiveDate=2012-03-02T10:21:05.000Z](1) ruleflow-group: goLiveDateCheck

2012-03-30 12:17:03,602 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) OBJECT ASSERTED value:MiamiContext[goLiveDate=2012-03-02T10:21:05.000Z] factId: 1

Log with 2^nd rule:-

2012-03-30 11:59:16,657 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) ACTIVATION CREATED rule:goLiveDateTEST activationId:goLiveDateTEST [0] declarations: ruleflow-group: goLiveDateCheck

2012-03-30 11:59:16,670 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE RULEFLOW STARTED process:liveDateStart[id=liveDateStart]

2012-03-30 11:59:16,677 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE PROCESS NODE TRIGGERED node:StartProcess[id=1] process:liveDateStart[id=liveDateStart]

2012-03-30 11:59:16,678 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE PROCESS NODE EXITED node:StartProcess[id=1] process:liveDateStart[id=liveDateStart]

2012-03-30 11:59:16,679 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE PROCESS NODE TRIGGERED node:goLiveDateCheck[id=3] process:liveDateStart[id=liveDateStart]

2012-03-30 11:59:16,680 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE RULEFLOW GROUP ACTIVATED group:goLiveDateCheck[size=1]

2012-03-30 11:59:16,681 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER RULEFLOW GROUP ACTIVATED group:goLiveDateCheck[size=1]

2012-03-30 11:59:16,681 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER PROCESS NODE TRIGGERED node:goLiveDateCheck[id=3] process:liveDateStart[id=liveDateStart]

2012-03-30 11:59:16,681 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER PROCESS NODE TRIGGERED node:StartProcess[id=1] process:liveDateStart[id=liveDateStart]

2012-03-30 11:59:16,699 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) ACTIVATION CREATED rule:Increment GoLiveDate activationId:Increment GoLiveDate [1] declarations: $date=2012-03-02T10:21:05.000Z(1); $miamiContext=MiamiContext[goLiveDate=2012-03-02T10:21:05.000Z](1) ruleflow-group: goLiveDateCheck

2012-03-30 11:59:16,700 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) OBJECT ASSERTED value:MiamiContext[goLiveDate=2012-03-02T10:21:05.000Z] factId: 1

2012-03-30 11:59:16,701 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE ACTIVATION FIRED rule:Increment GoLiveDate activationId:Increment GoLiveDate [1] declarations: $date=2012-03-02T10:21:05.000Z(1); $miamiContext=MiamiContext[goLiveDate=2012-03-02T10:21:05.000Z](1) ruleflow-group: goLiveDateCheck

2012-03-30 11:59:16,707 DEBUG [main] sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) *********** BEFORE:2012-03-02T10:21:05.000Z

2012-03-30 11:59:16,709 DEBUG [main] sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) *********** AFTER:2012-03-03T10:21:05.000Z

2012-03-30 11:59:16,710 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER ACTIVATION FIRED rule:Increment GoLiveDate activationId:Increment GoLiveDate [1] declarations: $date=2012-03-03T10:21:05.000Z(1); $miamiContext=MiamiContext[goLiveDate=2012-03-03T10:21:05.000Z](1) ruleflow-group: goLiveDateCheck

2012-03-30 11:59:16,710 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE ACTIVATION FIRED rule:goLiveDateTEST activationId:goLiveDateTEST [0] declarations: ruleflow-group: goLiveDateCheck

2012-03-30 11:59:16,710 DEBUG [main] sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) *********** goLiveDateTEST ***********

2012-03-30 11:59:16,711 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER ACTIVATION FIRED rule:goLiveDateTEST activationId:goLiveDateTEST [0] declarations: ruleflow-group: goLiveDateCheck

2012-03-30 11:59:16,711 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE RULEFLOW GROUP DEACTIVATED group:goLiveDateCheck[size=0]

2012-03-30 11:59:16,712 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER RULEFLOW GROUP DEACTIVATED group:goLiveDateCheck[size=0]

2012-03-30 11:59:16,714 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE PROCESS NODE EXITED node:goLiveDateCheck[id=3] process:liveDateStart[id=liveDateStart]

2012-03-30 11:59:16,714 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE PROCESS NODE TRIGGERED node:EndProcess[id=4] process:liveDateStart[id=liveDateStart]

2012-03-30 11:59:16,714 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE PROCESS NODE EXITED node:EndProcess[id=4] process:liveDateStart[id=liveDateStart]

2012-03-30 11:59:16,715 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) BEFORE RULEFLOW COMPLETED process:liveDateStart[id=liveDateStart]

2012-03-30 11:59:16,715 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER RULEFLOW COMPLETED process:liveDateStart[id=liveDateStart]

2012-03-30 11:59:16,715 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER PROCESS NODE TRIGGERED node:EndProcess[id=4] process:liveDateStart[id=liveDateStart]

2012-03-30 11:59:16,716 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER PROCESS NODE TRIGGERED node:EndProcess[id=4] process:liveDateStart[id=liveDateStart]

2012-03-30 11:59:16,716 DEBUG [main] uk.co.cdl.vis.miami.engine.rules.Slf4jWorkingMemoryLogger.logEventCreated(Slf4jWorkingMemoryLogger.java:23) AFTER PROCESS NODE TRIGGERED node:goLiveDateCheck[id=3] process:liveDateStart[id=liveDateStart]

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