date:20120312

[rules-users] How to empty the Working memory

2012-03-12 Thread Spade87

Hi, 

I'm using Drools as a part of a Mule ESB solution and I'm having some
problems. Each time i send a message to Drools from the ESB it's content
get's asserted as a new fact in the working memory and then there it stays.
I would like to only fire the rules on the content of the last message. Is
there some way to get a fresh working memory for each time drools is called. 

I found this post 
http://drools.46999.n3.nabble.com/How-to-make-the-working-memory-quot-clean-quot-td3790730.html

but i didn't understand how or if it was possible to do only using drl
files. I've tried passing the drools and kcontext variables to static helper
methods and assign a new session each time but then the application just
freezes up. 

Regards
//Johan

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Re: [rules-users] How to empty the Working memory

2012-03-12 Thread Wolfgang Laun

Perhaps you should use a rule to retract anything except the initial fact:

rule Clear
salience -100
when
$f: Object( eval( ! $f.getClass().equals(
org.drools.reteoo.InitialFactImpl.class) ) )
then
retract( $f );
end

Alternatively, use the type of an inserted fact, instead of Object and
omit the eval.

-W



On 12/03/2012, Spade87 johan.sp...@gmail.com wrote:
 Hi,

 I'm using Drools as a part of a Mule ESB solution and I'm having some
 problems. Each time i send a message to Drools from the ESB it's content
 get's asserted as a new fact in the working memory and then there it stays.
 I would like to only fire the rules on the content of the last message. Is
 there some way to get a fresh working memory for each time drools is called.

 I found this post
 http://drools.46999.n3.nabble.com/How-to-make-the-working-memory-quot-clean-quot-td3790730.html

 but i didn't understand how or if it was possible to do only using drl
 files. I've tried passing the drools and kcontext variables to static helper
 methods and assign a new session each time but then the application just
 freezes up.

 Regards
 //Johan

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Re: [rules-users] Persistence in fireUntilHalt() loop

2012-03-12 Thread Mark Proctor

it should work, if it doesn't then it seems like a bug. We are gearing 
up for release 5.4 now, so might be a while before we can address this. 
Unless there is a pull request with a suggested fix :)


Mark
On 08/03/2012 10:32, Alberto R. Galdo wrote:

Hi,

  We're running an application that uses Drools + JBPM 5 + Drools 
integration our set-up can be seen as:


  Some rule fires and creates a JBPM process ( a fact gets inserted 
into drools using 
kcontext.getKnowledgeRuntime().startProcess(testProcess) ). We 
have a problem with the persistence of this processes. Persistence is 
implemented with JPA and JTA. Our application runs with 
fireUntilHalt() and when a process is launched from the consequence of 
any of the rules the persistence of the process fails. If the 
application runs with fireAllRules(), the persistence works like a charm.

  The error shown is as follow:
  Exception in thread Thread-5 Exception executing consequence for 
rule Run Process in com.sample: java.lang.NullPointerException
at 
org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)

at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1101)
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1029)
at org.drools.common.DefaultAgenda.fireUntilHalt(DefaultAgenda.java:1229)
at 
org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:754)
at 
org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:730)
at 
org.drools.command.runtime.rule.FireUntilHaltCommand$1.run(FireUntilHaltCommand.java:50)

at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException
at 
org.jbpm.persistence.processinstance.JPAProcessInstanceManager.addProcessInstance(JPAProcessInstanceManager.java:44)
at 
org.jbpm.process.instance.AbstractProcessInstanceFactory.createProcessInstance(AbstractProcessInstanceFactory.java:36)
at 
org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:182)
at 
org.jbpm.process.instance.ProcessRuntimeImpl.createProcessInstance(ProcessRuntimeImpl.java:154)
at 
org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:135)
at 
org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:130)
at 
org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1074)
at 
org.drools.impl.StatefulKnowledgeSessionImpl.startProcess(StatefulKnowledgeSessionImpl.java:301)

at com.sample.Rule_Run_Process.defaultConsequence(Rule_Run_Process.java:9)
at 
com.sample.Rule_Run_ProcessDefaultConsequenceInvoker.evaluate(Unknown 
Source)

at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1091)
... 6 more
The problem is in this function:
public void addProcessInstance(ProcessInstance processInstance) {
ProcessInstanceInfo processInstanceInfo = new 
ProcessInstanceInfo( processInstance, this.kruntime.getEnvironment() );

ProcessPersistenceContext context
= ((ProcessPersistenceContextManager) 
this.kruntime.getEnvironment()

.get( EnvironmentName.PERSISTENCE_CONTEXT_MANAGER ))
.getProcessPersistenceContext();
// @PrePersist added to ProcessInstanceInfo because of this
context.persist( processInstanceInfo );
((org.jbpm.process.instance.ProcessInstance) 
processInstance).setId( processInstanceInfo.getId() );

processInstanceInfo.updateLastReadDate();
internalAddProcessInstance(processInstance);
}
We think after that persist sentence, the entity manager would have to 
run a flush sentence for the process instance is inserted into 
database and get the ID.

Greets.


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[rules-users] Class test fails (!= same as ==)

2012-03-12 Thread Wolfgang Laun

Using 5.3.0.Final, arbitrary facts and the rule shown below:

import org.drools.reteoo.InitialFactImpl

rule Clear when
$f: Object()  ###
then
if( ! ($f instanceof InitialFactImpl) ){
  System.out.println( retract a  + $f.getClass() );
  retract( $f );
}
end

This retracts my Foo, Bar and Counter facts. Good.

$f: Object( class == Foo.class )  ### changed

This retracts all of my Foo facts. Excellent.

$f: Object( class != Foo.class )  ### changed again

This retracts only Foo facts. Bad.

-W
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Re: [rules-users] How to empty the Working memory

2012-03-12 Thread Spade87

Using that rule worked, sort of... It correctly removes all of the objects in
the working memory. The problem is that it clears everything... If you use
mule together with drools the drools module will send back whatever you sen
to it to mule when there are no more rules fireing. If I delete everything
as a last step then I wont get my modified data back. Right now i have one
method that takes a WorkingMemory and a collection and inserts everything
from the collection in the working memory.

*Rule*
rule 'addAllFromCollection'
when
c : MyCollection ( newCollection == true )
then
DroolsUtil.insertCollection(drools.workingMemory, c )  
end

*JavaCode*
public static void insertCollection(WorkingMemory workingMemory, Collection
collection) {
Iterator iterator = collection.iterator();
while (iterator.hasNext()) {
workingMemory.insert(iterator.next());
}
}

Basically what i want to do is write a corresponding function to retract
everything that is old

*Rule*
rule 'retractAllFromCollection'
when
c : MyCollection ( newCollection == false )
then
DroolsUtil.retractCollection(drools.workingMemory, c )  
end

*JavaCode*
public static void retractCollection(WorkingMemory workingMemory, Collection
collection) {
Iterator iterator = collection.iterator();
while (iterator.hasNext()) {
workingMemory.retract(iterator.next());
}
}

The problem is that the method workingMemory.retract() doesn't take a
argument but a FactHandle as an argument but if i try something like 

*JavaCode*
public static void retractCollection(WorkingMemory workingMemory) {
Collection collection = workingMemory.getFactHandles();
Iterator iterator = collection.iterator();
while (iterator.hasNext()) {
workingMemory.retract(iterator.next());
}
}

I get a rather strange exception
java.lang.UnsupportedOperationException: this is implementedby
StatefulKnowledgeImpl
at
org.drools.reteoo.ReteooWorkingMemory.getFactHandles(ReteooWorkingMemory.java:363)
at
se.sunstone.ebs.mama.oneqc.drools.DroolsUtil.insertCollection(DroolsUtil.java:21)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

Any thoughts?

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Re: [rules-users] How to empty the Working memory

2012-03-12 Thread Wolfgang Laun

You can save the FactHandle returned from the insert() and retract that.

Or you can retrieve the FactHandle via the WorkingMemorEntryPoint
method getFactHandle( Object obj ).

-W



On 12/03/2012, Spade87 johan.sp...@gmail.com wrote:
 Using that rule worked, sort of... It correctly removes all of the objects
 in
 the working memory. The problem is that it clears everything... If you use
 mule together with drools the drools module will send back whatever you sen
 to it to mule when there are no more rules fireing. If I delete everything
 as a last step then I wont get my modified data back. Right now i have one
 method that takes a WorkingMemory and a collection and inserts everything
 from the collection in the working memory.

 *Rule*
 rule 'addAllFromCollection'
 when
   c : MyCollection ( newCollection == true )
 then
   DroolsUtil.insertCollection(drools.workingMemory, c )
 end

 *JavaCode*
 public static void insertCollection(WorkingMemory workingMemory, Collection
 collection) {
   Iterator iterator = collection.iterator();
   while (iterator.hasNext()) {
   workingMemory.insert(iterator.next());
   }
 }

 Basically what i want to do is write a corresponding function to retract
 everything that is old

 *Rule*
 rule 'retractAllFromCollection'
 when
   c : MyCollection ( newCollection == false )
 then
   DroolsUtil.retractCollection(drools.workingMemory, c )
 end

 *JavaCode*
 public static void retractCollection(WorkingMemory workingMemory, Collection
 collection) {
   Iterator iterator = collection.iterator();
   while (iterator.hasNext()) {
   workingMemory.retract(iterator.next());
   }
 }

 The problem is that the method workingMemory.retract() doesn't take a
 argument but a FactHandle as an argument but if i try something like

 *JavaCode*
 public static void retractCollection(WorkingMemory workingMemory) {
   Collection collection = workingMemory.getFactHandles();
   Iterator iterator = collection.iterator();
   while (iterator.hasNext()) {
   workingMemory.retract(iterator.next());
   }
 }

 I get a rather strange exception
 java.lang.UnsupportedOperationException: this is implementedby
 StatefulKnowledgeImpl
   at
 org.drools.reteoo.ReteooWorkingMemory.getFactHandles(ReteooWorkingMemory.java:363)
   at
 se.sunstone.ebs.mama.oneqc.drools.DroolsUtil.insertCollection(DroolsUtil.java:21)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

 Any thoughts?

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Re: [rules-users] How to empty the Working memory

2012-03-12 Thread Johan Spaedtke

Thank you that worked out nicely =)

//Johan

2012/3/12 Wolfgang Laun wolfgang.l...@gmail.com

 You can save the FactHandle returned from the insert() and retract that.

 Or you can retrieve the FactHandle via the WorkingMemorEntryPoint
 method getFactHandle( Object obj ).

 -W



 On 12/03/2012, Spade87 johan.sp...@gmail.com wrote:
  Using that rule worked, sort of... It correctly removes all of the
 objects
  in
  the working memory. The problem is that it clears everything... If you
 use
  mule together with drools the drools module will send back whatever you
 sen
  to it to mule when there are no more rules fireing. If I delete
 everything
  as a last step then I wont get my modified data back. Right now i have
 one
  method that takes a WorkingMemory and a collection and inserts everything
  from the collection in the working memory.
 
  *Rule*
  rule 'addAllFromCollection'
  when
c : MyCollection ( newCollection == true )
  then
DroolsUtil.insertCollection(drools.workingMemory, c )
  end
 
  *JavaCode*
  public static void insertCollection(WorkingMemory workingMemory,
 Collection
  collection) {
Iterator iterator = collection.iterator();
while (iterator.hasNext()) {
workingMemory.insert(iterator.next());
}
  }
 
  Basically what i want to do is write a corresponding function to retract
  everything that is old
 
  *Rule*
  rule 'retractAllFromCollection'
  when
c : MyCollection ( newCollection == false )
  then
DroolsUtil.retractCollection(drools.workingMemory, c )
  end
 
  *JavaCode*
  public static void retractCollection(WorkingMemory workingMemory,
 Collection
  collection) {
Iterator iterator = collection.iterator();
while (iterator.hasNext()) {
workingMemory.retract(iterator.next());
}
  }
 
  The problem is that the method workingMemory.retract() doesn't take a
  argument but a FactHandle as an argument but if i try something like
 
  *JavaCode*
  public static void retractCollection(WorkingMemory workingMemory) {
Collection collection = workingMemory.getFactHandles();
Iterator iterator = collection.iterator();
while (iterator.hasNext()) {
workingMemory.retract(iterator.next());
}
  }
 
  I get a rather strange exception
  java.lang.UnsupportedOperationException: this is implementedby
  StatefulKnowledgeImpl
at
 
 org.drools.reteoo.ReteooWorkingMemory.getFactHandles(ReteooWorkingMemory.java:363)
at
 
 se.sunstone.ebs.mama.oneqc.drools.DroolsUtil.insertCollection(DroolsUtil.java:21)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 
  Any thoughts?
 
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[rules-users] MVEL and nested properties takes longer time to build working memory

2012-03-12 Thread Anto Paul

Hi,
I have rules that uses nested properties. There are more than thousands
of such rules. Before using any nested properties, time to build working
memory(from decision tables) was pretty fast. After using nested
properties, rule compilation time increased by many folds and it is worse
in environments where NAS is used instead of SCSI disks.

Worst thing is I am not able to profile app using VisualVM as it gives
error that 64k limit of instrumented methods exceeded. So took some thread
dump using jstack and see that most often thread is doing class loading.
This is performed by MVEL classes.

On seeing this I used custom class loader in KnowledgeBuilder and
printed all loaded classes. I do not see that MVEL is using custom class
loader and is directly reading class using some other class loader.This
class loading is taking pretty long time when using network disks.

Is there any way to speed up rule compilation time when using nested
properties.Is there anything like a hint to tell MVEL to load fields of an
object directly from that class instead of searching it in entire
classpath? I see something like m: in
MVELDialectRuntimeData.getParserConfiguration().

Using Drools 5.30 Final and Decision tables.

Thanks,
Anto
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[rules-users] Setting Non-global Input Variable in ACTION Clause

2012-03-12 Thread mihajlo

Is there a way to set the inout variable in the ACTION clause of the decision
table, even if that variable is not declared as global nor used in any of
the conditions?

Thanks!

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Re: [rules-users] Setting Non-global Input Variable in ACTION Clause

2012-03-12 Thread Michael Anstis

Is it a typo - inout? Do you mean input or in-out (as in a
bi-directional parameter)?

You can create new facts in the RHS (ACTION) part of a decision table and
insert this into Working Memory.

Otherwise, can you please explain what you are trying to achieve a little
more?

Thanks,

On 12 March 2012 20:02, mihajlo mihajlo.jovano...@chase.com wrote:

 Is there a way to set the inout variable in the ACTION clause of the
 decision
 table, even if that variable is not declared as global nor used in any of
 the conditions?

 Thanks!

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[rules-users] Designer 2.1 install doubts

2012-03-12 Thread Cristiano Gavião


Hi,
I want to try the new version of Designer. So, I've got the 
designer-2.1-jboss7.war from people.redhat.com/tsurdilo/designer/master.
I've renamed to designer.war and deployed into my jboss AS7 that comes 
with jbpm-5.2.0.Final-installer-full.


JbossAS console at 
http://localhost:9990/console/App.html#deployment-list shows me that 
designer is enabled but when I try the url 
http://localhost:8080/designer/ I got a 404 error.


Am I missing something ?

Btw, must I have guvnor working just to try designer or can I deploy it 
in a fresh jboss AS instance ?


regards,

Cristiano
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Re: [rules-users] Designer 2.1 install doubts

2012-03-12 Thread Tihomir Surdilovic

Most likely you are missing an empty designer.dodeploy file in your AS 
installation deploy directory.
You can install designer without guvnor, however designer is currently 
storing processes in guvnor, so as standalone you can only view existing 
processes, but not create/save new ones.


Hope this helps.


On 3/12/12 5:47 PM, Cristiano Gavião wrote:

Hi,
I want to try the new version of Designer. So, I've got the 
designer-2.1-jboss7.war from people.redhat.com/tsurdilo/designer/master.
I've renamed to designer.war and deployed into my jboss AS7 that comes 
with jbpm-5.2.0.Final-installer-full.


JbossAS console at 
http://localhost:9990/console/App.html#deployment-list shows me that 
designer is enabled but when I try the url 
http://localhost:8080/designer/ I got a 404 error.


Am I missing something ?

Btw, must I have guvnor working just to try designer or can I deploy 
it in a fresh jboss AS instance ?


regards,

Cristiano


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[rules-users] Paralization

2012-03-12 Thread Nurlan

Hi, Guys!

I want to know is it possible in drools-planner paralization?

I mean solving 1 planning problem concurrently in 2 or more jvms

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[rules-users] How to empty the Working memory

Re: [rules-users] How to empty the Working memory

Re: [rules-users] Persistence in fireUntilHalt() loop

[rules-users] Class test fails (!= same as ==)

Re: [rules-users] How to empty the Working memory

Re: [rules-users] How to empty the Working memory

Re: [rules-users] How to empty the Working memory

[rules-users] MVEL and nested properties takes longer time to build working memory

[rules-users] Setting Non-global Input Variable in ACTION Clause

Re: [rules-users] Setting Non-global Input Variable in ACTION Clause

[rules-users] Designer 2.1 install doubts

Re: [rules-users] Designer 2.1 install doubts

[rules-users] Paralization

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