Re: [rules-users] NPE in Drools JPA Persistence with rules that use Flow

Shannon, What is the following method doing? engine.process(reading); Can you please open a JIRA and attach your test case or point me to the jira reporting this problem if it exists already? Thanks, Edson 2011/5/23 Shannon Hastings <shannon.hastings(a)inventrio.com&gt; I am using drools 5.2.0.M2 and I still get this error: Caused by: java.lang.NullPointerException at org.drools.marshalling.impl.InputMarshaller.readLeftTuple(InputMarshaller.java:469) Which was reported on drools 5.1.0 JIRA and claimed to be fixed. I see the error when trying to load a session that was persisted that had objects inserted that are time depended and cause rules to fire that use terms from flow such as "after". I only see this error if create a new session, submit some facts to it, close it, and then try to reload. If i do not submit any facts to it I do not get the error. I.E. If all i do is create the KB with my rules I can reload a session from the DB no problem, but if i submit some facts and persist the session, then i cannot reload it. This seems to be an issue with the JPA loading of the session that has facts in it that use Flow (JBPM). Any help would be greatly appreciated. Below are my simple rules followed by the test code used to submit the facts: package com.inventrio.rules.readings import com.inventrio.healthmonitoring.model.*; declare Reading @role(event) @timestamp(readingTime) end rule "High Blood Pressure" when $eventA : Reading(readingType.name == "BPMETER") $systolic : Value( this.valueType.name == "SYSTOLIC" ) from $eventA.values $diastolic : Value( this.valueType.name == "DIASTOLIC" ) from $eventA.values eval( $systolic.getLongValue() > 180 && $diastolic.getLongValue() > 120 ) then System.out.println("HIGH BLOOD PRESSURE" ); end rule "Weight Trending Up" when $eventC : Reading(readingType.name == "WEIGHT" ) $eventB : Reading( readingType.name == "WEIGHT" , this after[5s, 1m] $eventC ) $eventA : Reading( readingType.name == "WEIGHT" , this after[5s, 1m] $eventB ) $weight3 : Value( this.valueType.name == "WEIGHT" ) from $eventC.values $weight2 : Value( this.valueType.name == "WEIGHT" ) from $eventB.values $weight1 : Value( this.valueType.name == "WEIGHT" ) from $eventA.values eval( $weight3.getDoubleValue().doubleValue() < $weight2.getDoubleValue().doubleValue() + 1.0 && $weight2.getDoubleValue().doubleValue() < $weight1.getDoubleValue().doubleValue() + 1.0 ) then System.out.println("WEIGHT IS GOING UP" ); end rule "Weight Trending Down" when $eventC : Reading(readingType.name == "WEIGHT" ) $eventB : Reading( readingType.name == "WEIGHT" , this after[5s, 1m] $eventC ) $eventA : Reading( readingType.name == "WEIGHT" , this after[5s, 1m] $eventB ) $weight3 : Value( this.valueType.name == "WEIGHT" ) from $eventC.values $weight2 : Value( this.valueType.name == "WEIGHT" ) from $eventB.values $weight1 : Value( this.valueType.name == "WEIGHT" ) from $eventA.values eval( $weight3.getDoubleValue().doubleValue() > $weight2.getDoubleValue().doubleValue() + 1.0 && $weight2.getDoubleValue().doubleValue() > $weight1.getDoubleValue().doubleValue() + 1.0 ) then System.out.println("WEIGHT IS GOING DOWN" ); end And next is my object i insert before closeing and then trying to reload the session. public void testWeightRules() { try { Reading reading = new Reading(); reading.setReadingTime(new Date(System.currentTimeMillis())); ReadingType type = new ReadingType(); type.setName("WEIGHT"); type.setDescription(""); reading.setReadingType(type); Value value = new Value(); value.setDoubleValue(140.0); ValueType valueType = new ValueType(); valueType.setName("WEIGHT"); valueType.setDataType(ValueDataType.DOUBLE); value.setValueType(valueType); reading.getValues().add(value); reading.setReadingType(type); engine.process(reading); Thread.sleep(7000); reading = new Reading(); reading.setReadingTime(new Date(System.currentTimeMillis())); type = new ReadingType(); type.setName("WEIGHT"); type.setDescription(""); reading.setReadingType(type); value = new Value(); value.setDoubleValue(142.0); valueType = new ValueType(); valueType.setName("WEIGHT"); valueType.setDataType(ValueDataType.DOUBLE); value.setValueType(valueType); reading.getValues().add(value); reading.setReadingType(type); engine.process(reading); Thread.sleep(7000); reading = new Reading(); reading.setReadingTime(new Date(System.currentTimeMillis())); type = new ReadingType(); type.setName("WEIGHT"); type.setDescription(""); reading.setReadingType(type); value = new Value(); value.setDoubleValue(144.0); valueType = new ValueType(); valueType.setName("WEIGHT"); valueType.setDataType(ValueDataType.DOUBLE); value.setValueType(valueType); reading.getValues().add(value); reading.setReadingType(type); engine.process(reading); } catch (Throwable t) { t.printStackTrace(); } } Shannon Hastings Inventrio 545 Metro Place South, Suite 475 Dublin, OH 43017 Phone: (614) 389-2795 x101 Fax: (614) 522-6249 Email: shannon.hastings(a)inventrio.com http://www.inventrio.com _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users