Re: [rules-users] Error in Activator.java
Thanks! That worked:) -- View this message in context: http://drools.46999.n3.nabble.com/Error-in-Activator-java-tp4022753p4022755.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[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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Re: [rules-users] Help with DefaultAgenda.java
I replied to this on the DEV mailing list, this is the USER mailing list.
Please see the web archives.
Mark
On 11 Mar 2013, at 00:36, Mallory gmalathi...@gmail.com wrote:
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
--
View this message in context:
http://drools.46999.n3.nabble.com/Help-with-DefaultAgenda-java-tp4022758.html
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[rules-users] How to adjust different timezones in drools
Hi, Recently I encountered a problem, my server is in timezone -0700, but the client is in timezone +0800, so when client set a condition such as date = '11-Mar-2013', when client is in Mar 11, this condition should return true, but maybe the server is still in Mar 10, so the actual result of this condition is false, anyway to run out of this? -- View this message in context: http://drools.46999.n3.nabble.com/How-to-adjust-different-timezones-in-drools-tp4022759.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Expert Systems and Functional programming?
On Thu, Mar 7, 2013 at 2:44 PM, Matteo Mortari matteo.mort...@gmail.com wrote: The Question I'm asking myself: is there a specific, or few, areas where Functional Programming could actually benefit Expert Systems so much to actually spawn new paradigms of writing Rules? Or benefit in a new generation of the Rete algorithm? Or actually, Functional Programming will spawn a completely different paradigm of system which will go beyond Expert Systems the way are designed today? Great question, very inspiring just to think of the possibilities. The biggest opportunity out there right now is for rules-engines to help bridge the artificial gap that exists between the so called fundamental models of computation for the different camps. For example, Java is a Turing style sequential language and Lisp is a Church style functional language. This shoe-horning of languages into different camps is arbitrary, boring, mentally restrictive, totally artificial, and offers little more benefits than easily separating books on a bookshelf at the bookstore. It is really, really sad to see the quelling of creativity and reduction of the beautiful parts of different computational models reduced into tiny, little, lonely camps that must live in isolation. Digging into rules engines is a pathway, albeit deeply unpopular, into another important form computational expression that never really got it's day in the sun like the biggies today. New and interesting things will benefit all camps when they dig into the world of production systems and welcome it as a first class citizen to their programming toolbox. Would it result in new and great things? Who knows :). ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
