[rules-users] Help with DefaultAgenda.java

[Mallory]

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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Re: [rules-users] Error in Activator.java

[Mallory]

Thanks!

That worked:)



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[rules-users] Error in Activator.java

[Mallory]

Hi All,

I am new to drools and I am looking forward to receive help from experts out
here. I have created a new drools project where I will be using
drools-distribution-5.4.0.Final.

I have created three Source folders for drools-compiler-5.4.0.Final-sources,
drools-core-5.4.0.Final-sources and knowledge-api-5.4.0.Final-sources.

I have imported all the other binaries/JAR's available from the same
drools-distribution-5.4.0.Final folder using Java Build path. 

I have been getting errors in all the three source folders and the errors
are related to  Activator.java.

In all the import statements I am getting an error called The import
org.osgi cannot be resolved.

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.osgi.framework.ServiceRegistration;
import org.osgi.util.tracker.ServiceTracker;
import org.osgi.util.tracker.ServiceTrackerCustomizer;

I am not sure where to find org.osgi. Any help related to this is greatly
appreciated.

Thanks in advance,
Mallory



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[rules-users] Editing DefaultAgenda.java file from org.drools.common

[Mallory]

Hello,

I would be grateful to receive some help regarding editing Drools engine
source code. I am looking at making the drools engine execute rules parallel
so I went ahead and changed the  DefaultAgenda.java source file. On running
this file everything worked perfectly well. I tried to run two different for
loops from 1 to 500 in two different rules and I saw that both threads were
working together.

On the other hand when I make a jar file of this by using the class file for
DefaultAgenda and try to run in a new project I am getting the error below:

java.lang.NoSuchMethodError:
org.drools.RuleBaseConfiguration.getComponentFactory()Lorg/drools/reteoo/ReteooComponentFactory;
at 
org.drools.common.DefaultAgenda.setWorkingMemory(DefaultAgenda.java:215)
at
org.drools.reteoo.ReteooWorkingMemory.(ReteooWorkingMemory.java:110)
at
org.drools.reteoo.ReteooStatefulSession.(ReteooStatefulSession.java:81)
at
org.drools.reteoo.ReteooRuleBase.newStatefulSession(ReteooRuleBase.java:402)
at
org.drools.reteoo.ReteooRuleBase.newStatefulSession(ReteooRuleBase.java:387)
at
org.drools.impl.KnowledgeBaseImpl.newStatefulKnowledgeSession(KnowledgeBaseImpl.java:176)
at
org.drools.impl.KnowledgeBaseImpl.newStatefulKnowledgeSession(KnowledgeBaseImpl.java:163)
at drools.main.DroolsApi.createKnowledgeBase(DroolsApi.java:38)
at drools.main.TestMain.main(TestMain.java:8)


Can someone please help me fix this issue?

Thanks in advance:)



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