[
https://issues.jboss.org/browse/DROOLS-422?page=com.atlassian.jira.plugin...
]
Nedo Nedic commented on DROOLS-422:
-----------------------------------
Hello Davide
Tried it also with 5.6, and exactly the same behavior happens. When
TrackableTimerJobFactoryManager is set ( through
KnowledgeSessionConfiguration.setOption(TimerJobFactoryOption.get("trackable")
), the serialization of random scheduled activations and expired actions is failing with
this exception:
java.lang.NullPointerException at
org.drools.reteoo.ObjectTypeNode$ExpireJobContextTimerOutputMarshaller.serialize(ObjectTypeNode.java:711)
org.drools.marshalling.impl.ProtobufOutputMarshaller.writeTimers(ProtobufOutputMarshaller.java:742)
org.drools.marshalling.impl.ProtobufOutputMarshaller.serializeSession(ProtobufOutputMarshaller.java:187)
org.drools.marshalling.impl.ProtobufOutputMarshaller.writeSession(ProtobufOutputMarshaller.java:106)
org.drools.marshalling.impl.ProtobufMarshaller.marshall(ProtobufMarshaller.java:169)
org.drools.marshalling.impl.ProtobufMarshaller.marshall(ProtobufMarshaller.java:151)
I went through Drools source code, and trigger next fire time interval is sometimes
evaluated to null value:
PointInTimeTrigger trigger = ( PointInTimeTrigger )
jobHandle.getTimerJobInstance().getTrigger();
return ProtobufMessages.Timers.Timer.newBuilder()
.setType( ProtobufMessages.Timers.TimerType.EXPIRE )
.setExpire( ProtobufMessages.Timers.ExpireTimer.newBuilder()
.setHandleId( expireAction.getFactHandle().getId() )
.setEntryPointId(
expireAction.getNode().getEntryPoint().getEntryPointId() )
.setClassName(
((ClassObjectType)expireAction.getNode().getObjectType()).getClassType().getName() )
.setNextFireTimestamp( trigger.hasNextFireTime().getTime()
) <---------------------------------------------------- HERE, hastNextFireTime is Null
.build() )
.build();
Thanks
Timer based rules don't fire and facts can't expire after
session restore
-------------------------------------------------------------------------
Key: DROOLS-422
URL:
https://issues.jboss.org/browse/DROOLS-422
Project: Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Affects Versions: 5.5.0.Final
Environment: Linux Mint 15
JBoss AS 5.1
Reporter: Nedo Nedic
Assignee: Mark Proctor
Attachments: drools-mongodb-persistence.zip
I have implemented a custom persistence engine for Drools sessions in MongoDB. When
session is built for first time, everything works like a charm. I am having some problems
when Drools sessions are restored from MongoDB collection. Firstly, interval based rules
(for example timer(int: 10s 10s)) don't fire. Some facts that should expire, they just
don't expire and remain forever in WM. I attached the source code. When session is
built for first time, I use code like this:
KnowledgeBase kbase = createKBase(getKnowledgeBuilder(rulePackagePath),
config);
if (hasKnowledgeAgent) {
createKnowledgeAgent(kbase, correlatorId);
wm = (ReteooStatefulSession) ((KnowledgeBaseImpl) kagent
.getKnowledgeBase()).ruleBase.newStatefulSession(
(SessionConfiguration) ksconf, env);
ksession = new StatefulKnowledgeSessionImpl(wm, kagent
.getKnowledgeBase());
stateOutputMarshaller = StateMarshallerFactory.newOutputMarshaller(this, ksession,
ksconf);
stateOutputMarshaller.init();
((InternalKnowledgeRuntime) ksession).setEndOperationListener(this);
}
Then, after every action I update the session in MongoDB collection.
public void endOperation(InternalKnowledgeRuntime ikr) {
stateOutputMarshaller.marshall();
}
For session restoring, after AS restart I use this code:
KnowledgeBase kbase = createKBase( getKnowledgeBuilder(rulePackagePath), getKBaseConfig()
);
stateInputMarshaller = StateMarshallerFactory.newInputMarshaller( this, kbase,
getSessionConf() );
ksession = stateInputMarshaller.unmarshall(correlatorId);
stateOutputMarshaller = StateMarshallerFactory.newOutputMarshaller( this, ksession,
getSessionConf() );
((InternalKnowledgeRuntime)ksession).setEndOperationListener(this);
protected static KnowledgeBaseConfiguration getKBaseConfig() {
KnowledgeBaseConfiguration config = KnowledgeBaseFactory
.newKnowledgeBaseConfiguration();
config.setOption(EventProcessingOption.STREAM);
return config;
}
protected static KnowledgeSessionConfiguration getSessionConf() {
KnowledgeSessionConfiguration ksconf =
KnowledgeBaseFactory.newKnowledgeSessionConfiguration();
ksconf.setOption(ClockTypeOption.get("realtime"));
return ksconf;
}
Any help is appreciated.
Thanks
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