[rules-users] Help with DefaultAgenda.java
Hello,
I have tried to change the source code of DefaultAgenda.Java by adding the
code below:
//drools orginial sequential code
/*
while ( continueFiring( fireLimit ) && fireNextItem( agendaFilter )
) {
fireCount++;
fireLimit = updateFireLimit( fireLimit );
this.workingMemory.executeQueuedActions();
}
*/
//code with concurrency
InternalAgendaGroup myGroup = (InternalAgendaGroup) getNextFocus();
fireCount = myGroup.size();
for(int i =0; i< fireCount; ++i)
{
new Thread(new Runnable(){
public void run()
{
fireNextItem( agendaFilter );
}
}).start();
}
I am getting an Errorjava.lang.NullPointerException because my code flow is
going to consequenceExceptionHandler ! = null exception.
else if ( this.consequenceExceptionHandler != null ) {
this.consequenceExceptionHandler.handleException(
activation, this.workingMemory.getKnowledgeRuntime(),
e );
Could you kindly help me with this?
I am pasting the exception below and I am using Drools 5.4 Final version.
In DA: [Activation rule=Rule 1, act#=0, salience=0, tuple=[fact
0:0:1773684356:1306428912:0:DEFAULT:org.drools.reteoo.InitialFactImpl@4dde85f0]
]
Exception in thread "Thread-1" Exception in thread "Thread-0"
Exception
executing consequence for rule "Rule 1" in defaultpkg:
java.lang.NullPointerException
In DA WM: org.drools.impl.StatefulKnowledgeSessionImpl@542487b1
In DA Errorjava.lang.NullPointerException
In DA: [Activation rule=Rule 2, act#=1, salience=0, tuple=[fact
0:0:1773684356:1306428912:0:DEFAULT:org.drools.reteoo.InitialFactImpl@4dde85f0]
]
In DA WM: org.drools.impl.StatefulKnowledgeSessionImpl@542487b1
In DA Errorjava.lang.NullPointerException
at
org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)
at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287)
at
org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1208)
at org.drools.common.DefaultAgenda$1.run(DefaultAgenda.java:1471)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1272)
... 3 more
Exception executing consequence for rule "Rule 2" in defaultpkg:
java.lang.NullPointerException
at
org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)
at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287)
at
org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1208)
at org.drools.common.DefaultAgenda$1.run(DefaultAgenda.java:1471)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1272)
... 3 more
Thanks a lot for the help.
Regards,
Malory
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