[rules-users] Fusion: Insert passed events
Hi ! scenario: Event A then Event B. If there is no Event B after 5 min of A then trigger rule. *when time1:(Event) from entry-point xxx not (Event(this after[ 0,5m ] time1)) from entry-point xxx then ... end* For realtime event that works fine, but in real life you have the event coming in delayed, eg. from an interface. Example: Event A time: 01:00 (mm:ss) but received at 02:00 Above rule will trigger at 07:00, but the business logic would require it to be triggered at 06:00 How do I handle this kind of requirement ? Thanks Sven -- View this message in context: http://drools.46999.n3.nabble.com/Fusion-Insert-passed-events-tp3824630p3824630.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] Rule Compilation error when using custom classloader
Hello everybody,
I would appreciate some help with the compilation of a rule that involves
dynamically generated POJOs (minimal example at the end of the mail).
When I add the packages of the generated POJOs manually to the imported
packages of my Eclipse plug-in that executes the knowledge session
everything works fine.
When I use my custom classloader (that successfully loads all involved
classes, I checked this thoroughly) I get the following errors:
Unable to generate rule invoker. lts cannot be resolved to a type
Rule Compilation error lts cannot be resolved to a type
Do I need to change my rules just because the involved classes are now
loaded using my custom classloader?
Thanks for your help!
M. Kramer
This is the rule that only works if the package lts is listed under
Import-Package in the MANIFEST.MF:
import java.lang.String;
import java.util.ArrayList;
import java.util.HashMap;
import org.eclipse.emf.ecore.EObject;
global java.lang.String output;
global java.util.List list;
global java.util.List pclist;
rule Aspect
when
$s0Decl: lts.State(name == a)
$s0: lts.State(this == $s0Decl)
then
java.util.List param = new ArrayListHashMaplt;String,EObject();
java.util.List ids = new ArrayListString();
param.add($s0);
ids.add(0);
list.add(param);
pclist.add(ids);
end
This is the code that I am using to execute the rule:
void executeKnowledgeSession(String droolsRules, URLClassLoader
urlClassLoader, IterableEObject iterable) {
KnowledgeBuilderConfiguration kBuilderConfiguration =
KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(null,
urlClassLoader);
KnowledgeBuilder knowledgeBuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder(kBuilderConfiguration);
Resource droolsRulesResource =
ResourceFactory.newByteArrayResource(droolsRules.getBytes());
knowledgeBuilder.add(droolsRulesResource, ResourceType.DRL);
if (knowledgeBuilder.hasErrors()) {
...
}
KnowledgeBaseConfiguration kBaseConfiguration =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration(null, urlClassLoader);
KnowledgeBase knowledgeBase =
KnowledgeBaseFactory.newKnowledgeBase(kBaseConfiguration);
knowledgeBase.getKnowledgePackages().clear();
knowledgeBase.addKnowledgePackages(knowledgeBuilder.getKnowledgePackages());
StatelessKnowledgeSession knowledgeSession =
knowledgeBase.newStatelessKnowledgeSession();
knowledgeSession.setGlobal(...);
// execute the knowledge session
knowledgeSession.execute(iterable);
}
These are the exact errors that I get:
Unable to generate rule invoker. lts cannot be resolved to a type
lts cannot be resolved to a type
Rule Compilation error lts cannot be resolved to a type
Unable to generate rule invoker. : [Rule name='Aspect']
defaultpkg/Rule_Aspect_0DefaultConsequenceInvoker.java (22:883) : lts
cannot be resolved to a type
defaultpkg/Rule_Aspect_0DefaultConsequenceInvoker.java (22:901) : lts
cannot be resolved to a type
Rule Compilation error : [Rule name='Aspect']
defaultpkg/Rule_Aspect_0.java (6:322) : lts cannot be resolved to a type
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Re: [rules-users] Fusion: Insert passed events
Use the true time of the event for the event's @imestamp attribute and do not rely on the automatic timestamp added by the engine. Of course, if some event is delayed on the wire, rules checking the absence of an event will still fire incorrectly. -W On 14/03/2012, javadude s...@bighugesystems.com wrote: Hi ! scenario: Event A then Event B. If there is no Event B after 5 min of A then trigger rule. *when time1:(Event) from entry-point xxx not (Event(this after[ 0,5m ] time1)) from entry-point xxx then ... end* For realtime event that works fine, but in real life you have the event coming in delayed, eg. from an interface. Example: Event A time: 01:00 (mm:ss) but received at 02:00 Above rule will trigger at 07:00, but the business logic would require it to be triggered at 06:00 How do I handle this kind of requirement ? Thanks Sven -- View this message in context: http://drools.46999.n3.nabble.com/Fusion-Insert-passed-events-tp3824630p3824630.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] Problem with temporal operations spanning daylight to standard time
Designations like 2012-03-10 13:30:00.000 are just labels we attach
according to several conventions to the points in time (PiT) which are
a continuously numbered sequence of ticks (of a certain length),
starting at an arbitrary point in time. If you select two PiTs this
way and then calculate the number of ticks between them, you must make
sure that the PiTs have been selected by a suitable convention, i.e.,
one that isn't ambiguous and doesn't have gaps.
Such conventions are called Time Zones, and many of these don't pass
the aforementioned requirements. The new Date you create on your
system follows the convention adopted for your host's time and date,
and your cunning sysadmin has chosen a setting to conform to
Californian usage.
You have several options.
You can use the (deprectated) API of java.util.Date to create PiTs
using a clean mapping, e.g., the one provided by UTC.
Date utc = new Date( Date.UTC( 2012-1900, 3-1, 24, 0, 0, 0 ) );
Alternatively and avoiding deprecated methods and with a cleaner
interface, declare
private static Calendar calUTC =
new GregorianCalendar( TimeZone.getTimeZone(UTC) );
public static Date utcDate(int year, int month, int day ){
calUTC.set( year-1900, month-1, day );
return calUTC.getTime();
}
and call it like this:
Date utc = utcDate( 2012, 3, 24 );
Cheers
Wolfgang
On 13/03/2012, lhorton lhor...@abclegal.com wrote:
Most of the USA went from Standard Time to Daylight Time this past weekend.
We use some of the temporal operations in our rules, mainly to do
calculations of date differences by whole days, and some of the calculations
are wrong. The ones in error involve comparing dates where one is standard
time and one is daylight savings time. I wrote a small test case to prove
this.
I have a simple Person class:
public class Person {
private Date birthdate;
private int status;
public Date getBirthdate() {
return birthdate;
}
public void setBirthdate(Date birthdate) {
this.birthdate = birthdate;
}
public int getStatus() {
return status;
}
public void setStatus(int status) {
this.status = status;
}
}
and a simple drl file:
package com.drools.resources;
import com.drools.person.Person;
import java.util.Date;
import java.util.Calendar;
global Long now
rule Birthday Rule
dialect mvel
when
$person : Person(birthdate != null)
Date($bDate : time before[3d] now) from $person.birthdate
then
$person.setStatus(3);
end
rule Debug Birthday Rule
dialect mvel
when
$person : Person(birthdate != null)
then
System.out.println(now is + new Date(now));
System.out.println(birthdate is + $person.getBirthdate());
end
and two tests:
@Test
public void testTemporalJanuary() throws Exception {
KnowledgeBase base =
createKnowledgeBaseFromRulesFile(src/com/drools/resources/temporal.drl);
StatelessKnowledgeSession kSession =
createStatelessKnowledgeSession(base);
// test january - both dates are standard time
Date now = new Date(2012-1900, 00, 13);
kSession.getGlobals().set(now, now.getTime());
Person p = new Person();
p.setStatus(0);
p.setBirthdate(new Date(2012-1900, 00, 10));
kSession.execute(p);
assertTrue(p.getStatus() == 3);
}
@Test
public void testTemporalMarch() throws Exception {
KnowledgeBase base =
createKnowledgeBaseFromRulesFile(src/com/drools/resources/temporal.drl);
StatelessKnowledgeSession kSession =
createStatelessKnowledgeSession(base);
// test March: one day standard, the other is daylight
Date now = new Date(2012-1900, 02, 13);
kSession.getGlobals().set(now, now.getTime());
Person p = new Person();
p.setStatus(0);
p.setBirthdate(new Date(2012-1900, 02, 10));
kSession.execute(p);
assertTrue(p.getStatus() == 3);
}
the first test (testTemporalJanuary) compares January 13 to January 10, and
it passes (matches the before[3d] condition).
the second test (testTemporalMarch, which is the same except for using March
instead of January) fails.
The output of the debug rule for these tests is:
now is Fri Jan 13 00:00:00 PST 2012
birthdate is Tue Jan 10 00:00:00 PST 2012
now is Tue Mar 13 00:00:00 PDT 2012
birthdate is Sat Mar 10 00:00:00 PST 2012
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Re: [rules-users] drools arithmetics without eval()
Hi, These rules are all auto-generated every day, and I don't control what is going into them, so this kind of optimizations won't work for me. The basic problem here, is that I have tons of rules that count facts (PortfolioProducts) and use the result as rule conditions. Some conditions could look like this: count(PortfolioProduct(A)) + count(PortfolioProduct(B)) = ( count(PortfolioProduct(C)) - count(PortfolioProduct(D)) ) - count(PortfolioProduct(E)) and so on... All rules look like the rule I've posted: I first calculate all relevant fact counts to be used by the rule (accumulates), and then perform the logic/arithmetic evaluation using evals(). Some rules end up having 15 accumulates and 2 evals as conditions... My question is if using accumulate and eval() is the only choice I have to write these kind of rules. Regards, Tiago Lopes -- View this message in context: http://drools.46999.n3.nabble.com/drools-arithmetics-without-eval-tp3823232p3824958.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] drools arithmetics without eval()
And what if you perform the count in some java methods (a session listener on inserted objects which updates a big map?) and then only use resulting counters in rules ? If you have to use rules to compute the counters (for instance because it is not always as simple, or if you want to keep the ability to add arbitrary businness logic), you nay consider using objects for counters, and then have : - a first set of rules updating counters (using accumulate or not). The idea there is to share common accumulates instead of repeating them in many many rules. You can also use queries instead of accumulates. - a second set of rules checking counters to take a decision. - Mail original - De: fx242 dro...@fx242.com À: rules-users@lists.jboss.org Envoyé: Mercredi 14 Mars 2012 11:49:19 Objet: Re: [rules-users] drools arithmetics without eval() Hi, These rules are all auto-generated every day, and I don't control what is going into them, so this kind of optimizations won't work for me. The basic problem here, is that I have tons of rules that count facts (PortfolioProducts) and use the result as rule conditions. Some conditions could look like this: count(PortfolioProduct(A)) + count(PortfolioProduct(B)) = ( count(PortfolioProduct(C)) - count(PortfolioProduct(D)) ) - count(PortfolioProduct(E)) and so on... All rules look like the rule I've posted: I first calculate all relevant fact counts to be used by the rule (accumulates), and then perform the logic/arithmetic evaluation using evals(). Some rules end up having 15 accumulates and 2 evals as conditions... My question is if using accumulate and eval() is the only choice I have to write these kind of rules. Regards, Tiago Lopes -- View this message in context: http://drools.46999.n3.nabble.com/drools-arithmetics-without-eval-tp3823232p3824958.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 mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] drools arithmetics without eval()
accumulate is not the way to go.
If you need accumlated counts for certain facts, by type or, within
some type, by attribute value, then you should set up secondary facts
and maintain these during the element insertion process or by separate
(static) rules.
class ProductCounter {
String id;
int count; }
rule count
when
$pp: PortfolioProduct($pid: productId, prodCounted == false )
$pc: ProductCounter( id == $pid )
then
modify( $pc ){ setCount( $pc.getCount() + 1 ) }
end
And now you can generate the rules accessing the completed counts.
-W
On 14/03/2012, fx242 dro...@fx242.com wrote:
Hi,
These rules are all auto-generated every day, and I don't control what is
going into them, so this kind of optimizations won't work for me. The basic
problem here, is that I have tons of rules that count facts
(PortfolioProducts) and use the result as rule conditions.
Some conditions could look like this: count(PortfolioProduct(A)) +
count(PortfolioProduct(B)) = ( count(PortfolioProduct(C)) -
count(PortfolioProduct(D)) ) - count(PortfolioProduct(E))
and so on...
All rules look like the rule I've posted: I first calculate all relevant
fact counts to be used by the rule (accumulates), and then perform the
logic/arithmetic evaluation using evals(). Some rules end up having 15
accumulates and 2 evals as conditions...
My question is if using accumulate and eval() is the only choice I have to
write these kind of rules.
Regards,
Tiago Lopes
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Re: [rules-users] drools arithmetics without eval()
Wolfgang Laun wrote:
accumulate is not the way to go.
If you need accumlated counts for certain facts, by type or, within
some type, by attribute value, then you should set up secondary facts
and maintain these during the element insertion process or by separate
(static) rules.
class ProductCounter {
String id;
int count; }
rule count
when
$pp: PortfolioProduct($pid: productId, prodCounted == false )
$pc: ProductCounter( id == $pid )
then
modify( $pc ){ setCount( $pc.getCount() + 1 ) }
end
Shouldn't then be
then
modify( $pc ){ setCount( $pc.getCount() + 1 ) }
modify ($pp ){ setProdCounted( true ) }
end
I'm only asking to validate my understanding of the situation.
-Stathis
And now you can generate the rules accessing the completed counts.
-W
On 14/03/2012, fx242 dro...@fx242.com wrote:
Hi,
These rules are all auto-generated every day, and I don't control what
is
going into them, so this kind of optimizations won't work for me. The
basic
problem here, is that I have tons of rules that count facts
(PortfolioProducts) and use the result as rule conditions.
Some conditions could look like this: count(PortfolioProduct(A)) +
count(PortfolioProduct(B)) = ( count(PortfolioProduct(C)) -
count(PortfolioProduct(D)) ) - count(PortfolioProduct(E))
and so on...
All rules look like the rule I've posted: I first calculate all relevant
fact counts to be used by the rule (accumulates), and then perform the
logic/arithmetic evaluation using evals(). Some rules end up having 15
accumulates and 2 evals as conditions...
My question is if using accumulate and eval() is the only choice I have
to
write these kind of rules.
Regards,
Tiago Lopes
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Re: [rules-users] drools arithmetics without eval()
Oh yes, indeed.
-W
On 14/03/2012, rou...@mm.di.uoa.gr rou...@mm.di.uoa.gr wrote:
Wolfgang Laun wrote:
accumulate is not the way to go.
If you need accumlated counts for certain facts, by type or, within
some type, by attribute value, then you should set up secondary facts
and maintain these during the element insertion process or by separate
(static) rules.
class ProductCounter {
String id;
int count; }
rule count
when
$pp: PortfolioProduct($pid: productId, prodCounted == false )
$pc: ProductCounter( id == $pid )
then
modify( $pc ){ setCount( $pc.getCount() + 1 ) }
end
Shouldn't then be
then
modify( $pc ){ setCount( $pc.getCount() + 1 ) }
modify ($pp ){ setProdCounted( true ) }
end
I'm only asking to validate my understanding of the situation.
-Stathis
And now you can generate the rules accessing the completed counts.
-W
On 14/03/2012, fx242 dro...@fx242.com wrote:
Hi,
These rules are all auto-generated every day, and I don't control what
is
going into them, so this kind of optimizations won't work for me. The
basic
problem here, is that I have tons of rules that count facts
(PortfolioProducts) and use the result as rule conditions.
Some conditions could look like this: count(PortfolioProduct(A)) +
count(PortfolioProduct(B)) = ( count(PortfolioProduct(C)) -
count(PortfolioProduct(D)) ) - count(PortfolioProduct(E))
and so on...
All rules look like the rule I've posted: I first calculate all relevant
fact counts to be used by the rule (accumulates), and then perform the
logic/arithmetic evaluation using evals(). Some rules end up having 15
accumulates and 2 evals as conditions...
My question is if using accumulate and eval() is the only choice I have
to
write these kind of rules.
Regards,
Tiago Lopes
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Re: [rules-users] drools arithmetics without eval()
Yes, it should
But this kind of rule implies that a PortfolioProduct has a unique contribution
in a unique counter (when prodCounted becomes true, the PortfolioProduct won't
be counted anymore).
And I am not sure whether this kind of rule is more efficient than an
accumulate or a query (it implies a lot of updates, and to me this is
equivalent to an accumulate).
My way of doing such things is to count in a counter object (like the
ProductCounter here), but don't call modify (or update) to avoid loop and to
avoid adding some too technical stuff in rules.
Once all counting rules fired, I exec another rule (in a separate
ruleflow-group or agenda-group) that updates the counters.
Then I give the focus to decision rules ...
- Mail original -
De: rou...@mm.di.uoa.gr
À: rules-users@lists.jboss.org
Envoyé: Mercredi 14 Mars 2012 13:25:51
Objet: Re: [rules-users] drools arithmetics without eval()
Wolfgang Laun wrote:
accumulate is not the way to go.
If you need accumlated counts for certain facts, by type or, within
some type, by attribute value, then you should set up secondary facts
and maintain these during the element insertion process or by separate
(static) rules.
class ProductCounter {
String id;
int count; }
rule count
when
$pp: PortfolioProduct($pid: productId, prodCounted == false )
$pc: ProductCounter( id == $pid )
then
modify( $pc ){ setCount( $pc.getCount() + 1 ) }
end
Shouldn't then be
then
modify( $pc ){ setCount( $pc.getCount() + 1 ) }
modify ($pp ){ setProdCounted( true ) }
end
I'm only asking to validate my understanding of the situation.
-Stathis
And now you can generate the rules accessing the completed counts.
-W
On 14/03/2012, fx242 dro...@fx242.com wrote:
Hi,
These rules are all auto-generated every day, and I don't control what
is
going into them, so this kind of optimizations won't work for me. The
basic
problem here, is that I have tons of rules that count facts
(PortfolioProducts) and use the result as rule conditions.
Some conditions could look like this: count(PortfolioProduct(A)) +
count(PortfolioProduct(B)) = ( count(PortfolioProduct(C)) -
count(PortfolioProduct(D)) ) - count(PortfolioProduct(E))
and so on...
All rules look like the rule I've posted: I first calculate all relevant
fact counts to be used by the rule (accumulates), and then perform the
logic/arithmetic evaluation using evals(). Some rules end up having 15
accumulates and 2 evals as conditions...
My question is if using accumulate and eval() is the only choice I have
to
write these kind of rules.
Regards,
Tiago Lopes
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Re: [rules-users] Persistence in fireUntilHalt() loop
Hi Alberto,
This is a bug that has been fixed in jBPM. It had to do with lazy
initialization of a JPAProcessInstanceManager
field.
We'll be releasing a new jBPM version sometime soon (synchronous
with Drools, I think). The bug is fixed in there.
Regards,
Marco
03/08/2012 11:32 AM, Alberto R. Galdo:
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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Re: [rules-users] Persistence in fireUntilHalt() loop
Great news!
We were in the process of debugging JBPM trying to find the source of the
bug ... and maybe days away from the solution ...
Is there any bug report in Jira and/or a patch we can apply without having
to wait for the next release so we can quick-patch our systems?
Alberto R. Galdo
arga...@gmail.com
On Wed, Mar 14, 2012 at 13:09, Marco Rietveld mriet...@redhat.com wrote:
Hi Alberto,
This is a bug that has been fixed in jBPM. It had to do with lazy
initialization of a JPAProcessInstanceManager field.
We'll be releasing a new jBPM version sometime soon (synchronous with
Drools, I think). The bug is fixed in there.
Regards,
Marco
03/08/2012 11:32 AM, Alberto R. Galdo:
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] Drools and Jersey
Hi there, I am trying to make rest calls from Drools. For that I am using Jersey http://jersey.java.net/. I cannot no get it to work if I use mvel, otherwise it works fine. Here is a sample rule: -- import com.sun.jersey.api.client.Client; dialect mvel rule create Rest Client then new Client(); end -- I would love to be able to use mvel since it curves java syntax :) Thank you Mike ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools and Jersey
Hi Mike, I've never tried that before (a rule without the when part..) is good to know that it works :) Humm that's sounds weird.. why the dialect is affecting your Client creation. It could be that there is something wrong with the expression evaluation. It looks like MVEL cannot compile the new Client(); expression - at java.lang.String.init(Unknown Source) Did you try with something like: then \n Client c = new Client(); I'm just guessing here, because it looks strange 2012/3/14 mike mike...@gmail.com Hi Mauricio, Thank you for the speedy reply. Ia m making rest call to web services using jersey. I simplified the rule to the max. The 'when' is not really needed. I get the exception on the call to new Client(). Please keep in mind it works without dialect mvel. Thank you very much Mike Here's the stack trace . java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at java.lang.String.init(Unknown Source) at org.mvel2.CompileException.showCodeNearError(CompileException.java:149) at org.mvel2.CompileException.generateErrorMessage(CompileException.java:219) at org.mvel2.CompileException.toString(CompileException.java:62) at java.lang.Throwable.init(Throwable.java:242) at java.lang.Exception.init(Unknown Source) at java.lang.RuntimeException.init(Unknown Source) at org.drools.runtime.rule.ConsequenceException.init(ConsequenceException.java:31) 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.fireAllRules(DefaultAgenda.java:1251) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:709) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:673) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) at com.ultimatesoftware.engine.tests.Wip.drools_new_client(Wip.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:292) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) 2012/3/14 Mauricio Salatino sala...@gmail.com what are you trying to do? what's the error? the rule should look like rule create Rest Client when then new Client(); end 2012/3/14 mike mike...@gmail.com Hi there, I am trying to make rest calls from Drools. For that I am using Jersey http://jersey.java.net/. I cannot no get it to work if I use mvel, otherwise it works fine. Here is a sample rule: -- import com.sun.jersey.api.client.Client; dialect mvel rule create Rest Client then new Client(); end -- I would love to be able to use mvel since it curves java syntax :) Thank you Mike ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- - MyJourney @ http://salaboy.wordpress.com - Co-Founder @ http://www.jugargentina.org - Co-Founder @ http://www.jbug.com.ar
Re: [rules-users] Drools and Jersey
Hi Mauricio, I spent like 2 days debugging, before realizing that mvel was the culprit. The error is a Null Exception when resolving some service inside Jersey. I have to check my browser history at home for more details but the exception was happening inside Jersey. Please notice I reduced the code to the minimum. I had 'real' code doing more reasonable things with new Client. Client c = new Client() fails too. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Hi Mike, I've never tried that before (a rule without the when part..) is good to know that it works :) Humm that's sounds weird.. why the dialect is affecting your Client creation. It could be that there is something wrong with the expression evaluation. It looks like MVEL cannot compile the new Client(); expression - at java.lang.String.init(Unknown Source) Did you try with something like: then \n Client c = new Client(); I'm just guessing here, because it looks strange 2012/3/14 mike mike...@gmail.com Hi Mauricio, Thank you for the speedy reply. Ia m making rest call to web services using jersey. I simplified the rule to the max. The 'when' is not really needed. I get the exception on the call to new Client(). Please keep in mind it works without dialect mvel. Thank you very much Mike Here's the stack trace . java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at java.lang.String.init(Unknown Source) at org.mvel2.CompileException.showCodeNearError(CompileException.java:149) at org.mvel2.CompileException.generateErrorMessage(CompileException.java:219) at org.mvel2.CompileException.toString(CompileException.java:62) at java.lang.Throwable.init(Throwable.java:242) at java.lang.Exception.init(Unknown Source) at java.lang.RuntimeException.init(Unknown Source) at org.drools.runtime.rule.ConsequenceException.init(ConsequenceException.java:31) 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.fireAllRules(DefaultAgenda.java:1251) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:709) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:673) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) at com.ultimatesoftware.engine.tests.Wip.drools_new_client(Wip.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:292) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) 2012/3/14 Mauricio Salatino sala...@gmail.com what are you trying to do? what's the error? the rule should look like rule create Rest Client when then new Client(); end 2012/3/14 mike mike...@gmail.com Hi there, I am trying to make rest calls from Drools. For that I am using Jersey http://jersey.java.net/. I cannot no get it to work if I use mvel, otherwise it works fine. Here is a sample rule: -- import com.sun.jersey.api.client.Client; dialect
Re: [rules-users] Drools and Jersey
Cool that you find that :) Cheers 2012/3/14 mike mike...@gmail.com Hi Mauricio, I spent like 2 days debugging, before realizing that mvel was the culprit. The error is a Null Exception when resolving some service inside Jersey. I have to check my browser history at home for more details but the exception was happening inside Jersey. Please notice I reduced the code to the minimum. I had 'real' code doing more reasonable things with new Client. Client c = new Client() fails too. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Hi Mike, I've never tried that before (a rule without the when part..) is good to know that it works :) Humm that's sounds weird.. why the dialect is affecting your Client creation. It could be that there is something wrong with the expression evaluation. It looks like MVEL cannot compile the new Client(); expression - at java.lang.String.init(Unknown Source) Did you try with something like: then \n Client c = new Client(); I'm just guessing here, because it looks strange 2012/3/14 mike mike...@gmail.com Hi Mauricio, Thank you for the speedy reply. Ia m making rest call to web services using jersey. I simplified the rule to the max. The 'when' is not really needed. I get the exception on the call to new Client(). Please keep in mind it works without dialect mvel. Thank you very much Mike Here's the stack trace . java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at java.lang.String.init(Unknown Source) at org.mvel2.CompileException.showCodeNearError(CompileException.java:149) at org.mvel2.CompileException.generateErrorMessage(CompileException.java:219) at org.mvel2.CompileException.toString(CompileException.java:62) at java.lang.Throwable.init(Throwable.java:242) at java.lang.Exception.init(Unknown Source) at java.lang.RuntimeException.init(Unknown Source) at org.drools.runtime.rule.ConsequenceException.init(ConsequenceException.java:31) 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.fireAllRules(DefaultAgenda.java:1251) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:709) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:673) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) at com.ultimatesoftware.engine.tests.Wip.drools_new_client(Wip.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:292) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) 2012/3/14 Mauricio Salatino sala...@gmail.com what are you trying to do? what's the error? the rule should look like rule create Rest Client when then new Client(); end 2012/3/14 mike mike...@gmail.com Hi there, I am trying to make rest calls from Drools. For that I am using Jersey http://jersey.java.net/. I cannot no get it to work if I use mvel, otherwise it works fine. Here is a sample rule:
Re: [rules-users] Drools and Jersey
Wait ... I haven't solved the problem ... I mean, as of now I cannot use mvel if I want to use Jersey ... and I don't think it's Jersey's fault because it works in any condition except when using mvel. I thought that the Drools team follows this list and might be interested in that bug. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Cool that you find that :) Cheers 2012/3/14 mike mike...@gmail.com Hi Mauricio, I spent like 2 days debugging, before realizing that mvel was the culprit. The error is a Null Exception when resolving some service inside Jersey. I have to check my browser history at home for more details but the exception was happening inside Jersey. Please notice I reduced the code to the minimum. I had 'real' code doing more reasonable things with new Client. Client c = new Client() fails too. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Hi Mike, I've never tried that before (a rule without the when part..) is good to know that it works :) Humm that's sounds weird.. why the dialect is affecting your Client creation. It could be that there is something wrong with the expression evaluation. It looks like MVEL cannot compile the new Client(); expression - at java.lang.String.init(Unknown Source) Did you try with something like: then \n Client c = new Client(); I'm just guessing here, because it looks strange 2012/3/14 mike mike...@gmail.com Hi Mauricio, Thank you for the speedy reply. Ia m making rest call to web services using jersey. I simplified the rule to the max. The 'when' is not really needed. I get the exception on the call to new Client(). Please keep in mind it works without dialect mvel. Thank you very much Mike Here's the stack trace . java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at java.lang.String.init(Unknown Source) at org.mvel2.CompileException.showCodeNearError(CompileException.java:149) at org.mvel2.CompileException.generateErrorMessage(CompileException.java:219) at org.mvel2.CompileException.toString(CompileException.java:62) at java.lang.Throwable.init(Throwable.java:242) at java.lang.Exception.init(Unknown Source) at java.lang.RuntimeException.init(Unknown Source) at org.drools.runtime.rule.ConsequenceException.init(ConsequenceException.java:31) 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.fireAllRules(DefaultAgenda.java:1251) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:709) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:673) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) at com.ultimatesoftware.engine.tests.Wip.drools_new_client(Wip.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:292) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) 2012/3/14 Mauricio Salatino sala...@gmail.com what are you trying to do? what's the error?
Re: [rules-users] Drools and Jersey
Do you mean that the NPE deep inside Jersey only happens when you use dialect mvel?!? Disaster strikes in MVEL when it tries to report the exception thrown while the rule executes. Which Drools version are you using? -W On 14/03/2012, mike mike...@gmail.com wrote: Wait ... I haven't solved the problem ... I mean, as of now I cannot use mvel if I want to use Jersey ... and I don't think it's Jersey's fault because it works in any condition except when using mvel. I thought that the Drools team follows this list and might be interested in that bug. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Cool that you find that :) Cheers 2012/3/14 mike mike...@gmail.com Hi Mauricio, I spent like 2 days debugging, before realizing that mvel was the culprit. The error is a Null Exception when resolving some service inside Jersey. I have to check my browser history at home for more details but the exception was happening inside Jersey. Please notice I reduced the code to the minimum. I had 'real' code doing more reasonable things with new Client. Client c = new Client() fails too. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Hi Mike, I've never tried that before (a rule without the when part..) is good to know that it works :) Humm that's sounds weird.. why the dialect is affecting your Client creation. It could be that there is something wrong with the expression evaluation. It looks like MVEL cannot compile the new Client(); expression - at java.lang.String.init(Unknown Source) Did you try with something like: then \n Client c = new Client(); I'm just guessing here, because it looks strange 2012/3/14 mike mike...@gmail.com Hi Mauricio, Thank you for the speedy reply. Ia m making rest call to web services using jersey. I simplified the rule to the max. The 'when' is not really needed. I get the exception on the call to new Client(). Please keep in mind it works without dialect mvel. Thank you very much Mike Here's the stack trace . java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at java.lang.String.init(Unknown Source) at org.mvel2.CompileException.showCodeNearError(CompileException.java:149) at org.mvel2.CompileException.generateErrorMessage(CompileException.java:219) at org.mvel2.CompileException.toString(CompileException.java:62) at java.lang.Throwable.init(Throwable.java:242) at java.lang.Exception.init(Unknown Source) at java.lang.RuntimeException.init(Unknown Source) at org.drools.runtime.rule.ConsequenceException.init(ConsequenceException.java:31) 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.fireAllRules(DefaultAgenda.java:1251) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:709) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:673) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) at com.ultimatesoftware.engine.tests.Wip.drools_new_client(Wip.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:292) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at
Re: [rules-users] Drools and Jersey
Sure.. we are interested in finding out what is happening. So, you find that when you are using mvel something inside Jersey fails? Did you find what exactly is happening inside Jersey? Probably it's something related with the class loaders, but I never seen an error like that when you specify the mvel dialect. By the way, what exactly are you trying to do with mvel? did you try using the mvel syntax without explicitly specifying the dialect? Cheers 2012/3/14 mike mike...@gmail.com Wait ... I haven't solved the problem ... I mean, as of now I cannot use mvel if I want to use Jersey ... and I don't think it's Jersey's fault because it works in any condition except when using mvel. I thought that the Drools team follows this list and might be interested in that bug. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Cool that you find that :) Cheers 2012/3/14 mike mike...@gmail.com Hi Mauricio, I spent like 2 days debugging, before realizing that mvel was the culprit. The error is a Null Exception when resolving some service inside Jersey. I have to check my browser history at home for more details but the exception was happening inside Jersey. Please notice I reduced the code to the minimum. I had 'real' code doing more reasonable things with new Client. Client c = new Client() fails too. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Hi Mike, I've never tried that before (a rule without the when part..) is good to know that it works :) Humm that's sounds weird.. why the dialect is affecting your Client creation. It could be that there is something wrong with the expression evaluation. It looks like MVEL cannot compile the new Client(); expression - at java.lang.String.init(Unknown Source) Did you try with something like: then \n Client c = new Client(); I'm just guessing here, because it looks strange 2012/3/14 mike mike...@gmail.com Hi Mauricio, Thank you for the speedy reply. Ia m making rest call to web services using jersey. I simplified the rule to the max. The 'when' is not really needed. I get the exception on the call to new Client(). Please keep in mind it works without dialect mvel. Thank you very much Mike Here's the stack trace . java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at java.lang.String.init(Unknown Source) at org.mvel2.CompileException.showCodeNearError(CompileException.java:149) at org.mvel2.CompileException.generateErrorMessage(CompileException.java:219) at org.mvel2.CompileException.toString(CompileException.java:62) at java.lang.Throwable.init(Throwable.java:242) at java.lang.Exception.init(Unknown Source) at java.lang.RuntimeException.init(Unknown Source) at org.drools.runtime.rule.ConsequenceException.init(ConsequenceException.java:31) 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.fireAllRules(DefaultAgenda.java:1251) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:709) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:673) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) at com.ultimatesoftware.engine.tests.Wip.drools_new_client(Wip.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:292) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at
Re: [rules-users] Drools and Jersey
Wolfgang, I am using dependency groupIdorg.drools/groupId artifactIddrools-core/artifactId version5.3.1.Final/version typejar/type /dependency Mauricio: It is something related to loading classes inside Jersey that brakes if I am using mvel. I use mvel always, because java syntax hurts me. Drools Team: I think the easier way would be to try this scenario yourself. This is a pom for Jersey. dependency groupIdcom.sun.jersey/groupId artifactIdjersey-client/artifactId version1.12/version /dependency Thank you very much Cheers Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Sure.. we are interested in finding out what is happening. So, you find that when you are using mvel something inside Jersey fails? Did you find what exactly is happening inside Jersey? Probably it's something related with the class loaders, but I never seen an error like that when you specify the mvel dialect. By the way, what exactly are you trying to do with mvel? did you try using the mvel syntax without explicitly specifying the dialect? Cheers 2012/3/14 mike mike...@gmail.com Wait ... I haven't solved the problem ... I mean, as of now I cannot use mvel if I want to use Jersey ... and I don't think it's Jersey's fault because it works in any condition except when using mvel. I thought that the Drools team follows this list and might be interested in that bug. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Cool that you find that :) Cheers 2012/3/14 mike mike...@gmail.com Hi Mauricio, I spent like 2 days debugging, before realizing that mvel was the culprit. The error is a Null Exception when resolving some service inside Jersey. I have to check my browser history at home for more details but the exception was happening inside Jersey. Please notice I reduced the code to the minimum. I had 'real' code doing more reasonable things with new Client. Client c = new Client() fails too. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Hi Mike, I've never tried that before (a rule without the when part..) is good to know that it works :) Humm that's sounds weird.. why the dialect is affecting your Client creation. It could be that there is something wrong with the expression evaluation. It looks like MVEL cannot compile the new Client(); expression - at java.lang.String.init(Unknown Source) Did you try with something like: then \n Client c = new Client(); I'm just guessing here, because it looks strange 2012/3/14 mike mike...@gmail.com Hi Mauricio, Thank you for the speedy reply. Ia m making rest call to web services using jersey. I simplified the rule to the max. The 'when' is not really needed. I get the exception on the call to new Client(). Please keep in mind it works without dialect mvel. Thank you very much Mike Here's the stack trace . java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at java.lang.String.init(Unknown Source) at org.mvel2.CompileException.showCodeNearError(CompileException.java:149) at org.mvel2.CompileException.generateErrorMessage(CompileException.java:219) at org.mvel2.CompileException.toString(CompileException.java:62) at java.lang.Throwable.init(Throwable.java:242) at java.lang.Exception.init(Unknown Source) at java.lang.RuntimeException.init(Unknown Source) at org.drools.runtime.rule.ConsequenceException.init(ConsequenceException.java:31) 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.fireAllRules(DefaultAgenda.java:1251) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:709) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:673) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) at com.ultimatesoftware.engine.tests.Wip.drools_new_client(Wip.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69) at
Re: [rules-users] Drools and Jersey
You could help and narrow this down and use this custom exception handler. It should provide better diagnostics of what happens instead of running into the weird MVEL index bound error. http://members.inode.at/w.laun/drools/CustomConsequenceExceptionHandlingHowTo.html If you need any help with this, I'll be online again from now+1hr -W On 14/03/2012, mike mike...@gmail.com wrote: Wolfgang, I am using dependency groupIdorg.drools/groupId artifactIddrools-core/artifactId version5.3.1.Final/version typejar/type /dependency Mauricio: It is something related to loading classes inside Jersey that brakes if I am using mvel. I use mvel always, because java syntax hurts me. Drools Team: I think the easier way would be to try this scenario yourself. This is a pom for Jersey. dependency groupIdcom.sun.jersey/groupId artifactIdjersey-client/artifactId version1.12/version /dependency Thank you very much Cheers Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Sure.. we are interested in finding out what is happening. So, you find that when you are using mvel something inside Jersey fails? Did you find what exactly is happening inside Jersey? Probably it's something related with the class loaders, but I never seen an error like that when you specify the mvel dialect. By the way, what exactly are you trying to do with mvel? did you try using the mvel syntax without explicitly specifying the dialect? Cheers 2012/3/14 mike mike...@gmail.com Wait ... I haven't solved the problem ... I mean, as of now I cannot use mvel if I want to use Jersey ... and I don't think it's Jersey's fault because it works in any condition except when using mvel. I thought that the Drools team follows this list and might be interested in that bug. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Cool that you find that :) Cheers 2012/3/14 mike mike...@gmail.com Hi Mauricio, I spent like 2 days debugging, before realizing that mvel was the culprit. The error is a Null Exception when resolving some service inside Jersey. I have to check my browser history at home for more details but the exception was happening inside Jersey. Please notice I reduced the code to the minimum. I had 'real' code doing more reasonable things with new Client. Client c = new Client() fails too. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Hi Mike, I've never tried that before (a rule without the when part..) is good to know that it works :) Humm that's sounds weird.. why the dialect is affecting your Client creation. It could be that there is something wrong with the expression evaluation. It looks like MVEL cannot compile the new Client(); expression - at java.lang.String.init(Unknown Source) Did you try with something like: then \n Client c = new Client(); I'm just guessing here, because it looks strange 2012/3/14 mike mike...@gmail.com Hi Mauricio, Thank you for the speedy reply. Ia m making rest call to web services using jersey. I simplified the rule to the max. The 'when' is not really needed. I get the exception on the call to new Client(). Please keep in mind it works without dialect mvel. Thank you very much Mike Here's the stack trace . java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at java.lang.String.init(Unknown Source) at org.mvel2.CompileException.showCodeNearError(CompileException.java:149) at org.mvel2.CompileException.generateErrorMessage(CompileException.java:219) at org.mvel2.CompileException.toString(CompileException.java:62) at java.lang.Throwable.init(Throwable.java:242) at java.lang.Exception.init(Unknown Source) at java.lang.RuntimeException.init(Unknown Source) at org.drools.runtime.rule.ConsequenceException.init(ConsequenceException.java:31) 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.fireAllRules(DefaultAgenda.java:1251) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:709) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:673) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) at com.ultimatesoftware.engine.tests.Wip.drools_new_client(Wip.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at
Re: [rules-users] Drools and Jersey
Drools Team, I am doing this for my company so if you have some sort of paid support channel I think my company would be willing to pay (I'll have to ask to my managers first). Cheers Mike On Wed, Mar 14, 2012 at 12:45 PM, mike mike...@gmail.com wrote: Wolfgang, I am using dependency groupIdorg.drools/groupId artifactIddrools-core/artifactId version5.3.1.Final/version typejar/type /dependency Mauricio: It is something related to loading classes inside Jersey that brakes if I am using mvel. I use mvel always, because java syntax hurts me. Drools Team: I think the easier way would be to try this scenario yourself. This is a pom for Jersey. dependency groupIdcom.sun.jersey/groupId artifactIdjersey-client/artifactId version1.12/version /dependency Thank you very much Cheers Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Sure.. we are interested in finding out what is happening. So, you find that when you are using mvel something inside Jersey fails? Did you find what exactly is happening inside Jersey? Probably it's something related with the class loaders, but I never seen an error like that when you specify the mvel dialect. By the way, what exactly are you trying to do with mvel? did you try using the mvel syntax without explicitly specifying the dialect? Cheers 2012/3/14 mike mike...@gmail.com Wait ... I haven't solved the problem ... I mean, as of now I cannot use mvel if I want to use Jersey ... and I don't think it's Jersey's fault because it works in any condition except when using mvel. I thought that the Drools team follows this list and might be interested in that bug. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Cool that you find that :) Cheers 2012/3/14 mike mike...@gmail.com Hi Mauricio, I spent like 2 days debugging, before realizing that mvel was the culprit. The error is a Null Exception when resolving some service inside Jersey. I have to check my browser history at home for more details but the exception was happening inside Jersey. Please notice I reduced the code to the minimum. I had 'real' code doing more reasonable things with new Client. Client c = new Client() fails too. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Hi Mike, I've never tried that before (a rule without the when part..) is good to know that it works :) Humm that's sounds weird.. why the dialect is affecting your Client creation. It could be that there is something wrong with the expression evaluation. It looks like MVEL cannot compile the new Client(); expression - at java.lang.String.init(Unknown Source) Did you try with something like: then \n Client c = new Client(); I'm just guessing here, because it looks strange 2012/3/14 mike mike...@gmail.com Hi Mauricio, Thank you for the speedy reply. Ia m making rest call to web services using jersey. I simplified the rule to the max. The 'when' is not really needed. I get the exception on the call to new Client(). Please keep in mind it works without dialect mvel. Thank you very much Mike Here's the stack trace . java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at java.lang.String.init(Unknown Source) at org.mvel2.CompileException.showCodeNearError(CompileException.java:149) at org.mvel2.CompileException.generateErrorMessage(CompileException.java:219) at org.mvel2.CompileException.toString(CompileException.java:62) at java.lang.Throwable.init(Throwable.java:242) at java.lang.Exception.init(Unknown Source) at java.lang.RuntimeException.init(Unknown Source) at org.drools.runtime.rule.ConsequenceException.init(ConsequenceException.java:31) 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.fireAllRules(DefaultAgenda.java:1251) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:709) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:673) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) at com.ultimatesoftware.engine.tests.Wip.drools_new_client(Wip.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at
Re: [rules-users] Drools and Jersey
If you create an isolated test you can also create a new Jira issue, so it's easier for every one to reproduce, test and fix the problem. Cheers 2012/3/14 mike mike...@gmail.com Wolfgang, I am using dependency groupIdorg.drools/groupId artifactIddrools-core/artifactId version5.3.1.Final/version typejar/type /dependency Mauricio: It is something related to loading classes inside Jersey that brakes if I am using mvel. I use mvel always, because java syntax hurts me. Drools Team: I think the easier way would be to try this scenario yourself. This is a pom for Jersey. dependency groupIdcom.sun.jersey/groupId artifactIdjersey-client/artifactId version1.12/version /dependency Thank you very much Cheers Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Sure.. we are interested in finding out what is happening. So, you find that when you are using mvel something inside Jersey fails? Did you find what exactly is happening inside Jersey? Probably it's something related with the class loaders, but I never seen an error like that when you specify the mvel dialect. By the way, what exactly are you trying to do with mvel? did you try using the mvel syntax without explicitly specifying the dialect? Cheers 2012/3/14 mike mike...@gmail.com Wait ... I haven't solved the problem ... I mean, as of now I cannot use mvel if I want to use Jersey ... and I don't think it's Jersey's fault because it works in any condition except when using mvel. I thought that the Drools team follows this list and might be interested in that bug. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Cool that you find that :) Cheers 2012/3/14 mike mike...@gmail.com Hi Mauricio, I spent like 2 days debugging, before realizing that mvel was the culprit. The error is a Null Exception when resolving some service inside Jersey. I have to check my browser history at home for more details but the exception was happening inside Jersey. Please notice I reduced the code to the minimum. I had 'real' code doing more reasonable things with new Client. Client c = new Client() fails too. Thank you very much Mike 2012/3/14 Mauricio Salatino sala...@gmail.com Hi Mike, I've never tried that before (a rule without the when part..) is good to know that it works :) Humm that's sounds weird.. why the dialect is affecting your Client creation. It could be that there is something wrong with the expression evaluation. It looks like MVEL cannot compile the new Client(); expression - at java.lang.String.init(Unknown Source) Did you try with something like: then \n Client c = new Client(); I'm just guessing here, because it looks strange 2012/3/14 mike mike...@gmail.com Hi Mauricio, Thank you for the speedy reply. Ia m making rest call to web services using jersey. I simplified the rule to the max. The 'when' is not really needed. I get the exception on the call to new Client(). Please keep in mind it works without dialect mvel. Thank you very much Mike Here's the stack trace . java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at java.lang.String.init(Unknown Source) at org.mvel2.CompileException.showCodeNearError(CompileException.java:149) at org.mvel2.CompileException.generateErrorMessage(CompileException.java:219) at org.mvel2.CompileException.toString(CompileException.java:62) at java.lang.Throwable.init(Throwable.java:242) at java.lang.Exception.init(Unknown Source) at java.lang.RuntimeException.init(Unknown Source) at org.drools.runtime.rule.ConsequenceException.init(ConsequenceException.java:31) 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.fireAllRules(DefaultAgenda.java:1251) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:709) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:673) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) at com.ultimatesoftware.engine.tests.Wip.drools_new_client(Wip.java:32) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at
Re: [rules-users] Drools and Jersey
Wolfgang,
I am able to find the place where the NPE happens. It is
in com.sun.jersey.spi.service.ServiceFinder on the method
private static EnumerationURL getResources(ClassLoader loader, String
name) throws IOException {
if (loader == null) {
return getResources(name);
} else {
final EnumerationURL resources = loader.getResources(name);
if (resources.hasMoreElements()) {
return resources;
} else {
return getResources(name);
}
}
}
In there, the call to loader.getResources(name) returns null
causing resources.hasMoreElements() to throw the NPE. That is a bug in
Jersey. But the same code works just fine without MVEL. So MVEL is doing
something that is causing Jersey not to find some classes.
Mauricio,
The test is simple, try running this drl
import com.sun.jersey.api.client.Client;
dialect mvel
rule create Rest Client
then new Client();
end
OTOH this works just fine
import com.sun.jersey.api.client.Client;
rule create Rest Client
then new Client();
end
Thank you very much for your help
Cheers
Mike
2012/3/14 Mauricio Salatino sala...@gmail.com
If you create an isolated test you can also create a new Jira issue, so
it's easier for every one to reproduce, test and fix the problem.
Cheers
2012/3/14 mike mike...@gmail.com
Wolfgang,
I am using
dependency
groupIdorg.drools/groupId
artifactIddrools-core/artifactId
version5.3.1.Final/version
typejar/type
/dependency
Mauricio:
It is something related to loading classes inside Jersey that brakes if I
am using mvel. I use mvel always, because java syntax hurts me.
Drools Team:
I think the easier way would be to try this scenario yourself. This is a
pom for Jersey.
dependency
groupIdcom.sun.jersey/groupId
artifactIdjersey-client/artifactId
version1.12/version
/dependency
Thank you very much
Cheers
Mike
2012/3/14 Mauricio Salatino sala...@gmail.com
Sure.. we are interested in finding out what is happening. So, you find
that when you are using mvel something inside Jersey fails?
Did you find what exactly is happening inside Jersey? Probably it's
something related with the class loaders, but I never seen an error like
that when you specify the mvel dialect.
By the way, what exactly are you trying to do with mvel? did you try
using the mvel syntax without explicitly specifying the dialect?
Cheers
2012/3/14 mike mike...@gmail.com
Wait ... I haven't solved the problem ... I mean, as of now I cannot
use mvel if I want to use Jersey ... and I don't think it's Jersey's fault
because it works in any condition except when using mvel. I thought that
the Drools team follows this list and might be interested in that bug.
Thank you very much
Mike
2012/3/14 Mauricio Salatino sala...@gmail.com
Cool that you find that :)
Cheers
2012/3/14 mike mike...@gmail.com
Hi Mauricio,
I spent like 2 days debugging, before realizing that mvel was the
culprit. The error is a Null Exception when resolving some service inside
Jersey. I have to check my browser history at home for more details but
the
exception was happening inside Jersey.
Please notice I reduced the code to the minimum. I had 'real' code
doing more reasonable things with new Client. Client c = new Client()
fails
too.
Thank you very much
Mike
2012/3/14 Mauricio Salatino sala...@gmail.com
Hi Mike, I've never tried that before (a rule without the when
part..) is good to know that it works :)
Humm that's sounds weird.. why the dialect is affecting your Client
creation.
It could be that there is something wrong with the expression
evaluation.
It looks like MVEL cannot compile the new Client(); expression - at
java.lang.String.init(Unknown Source)
Did you try with something like:
then \n
Client c = new Client();
I'm just guessing here, because it looks strange
2012/3/14 mike mike...@gmail.com
Hi Mauricio,
Thank you for the speedy reply. Ia m making rest call to web
services using jersey. I simplified the rule to the max. The 'when' is
not
really needed. I get the exception on the call to new Client().
Please
keep in mind it works without dialect mvel.
Thank you very much
Mike
Here's the stack trace .
java.lang.StringIndexOutOfBoundsException: String index out of
range: -1
at java.lang.String.init(Unknown Source)
at
org.mvel2.CompileException.showCodeNearError(CompileException.java:149)
at
org.mvel2.CompileException.generateErrorMessage(CompileException.java:219)
at org.mvel2.CompileException.toString(CompileException.java:62)
at java.lang.Throwable.init(Throwable.java:242)
at java.lang.Exception.init(Unknown Source)
at java.lang.RuntimeException.init(Unknown Source)
at
org.drools.runtime.rule.ConsequenceException.init(ConsequenceException.java:31)
at
[rules-users] Future events
Hello: I have this rule: An event is inserted that has a timestamp in the future, the rule is fired. This looks like a bug, because the sliding time window has not yet met the timestamp of the event. I expect the rule to fire not immediately but only when the time reaches the event time. Is my assumption/understanding correct? -- View this message in context: http://drools.46999.n3.nabble.com/Future-events-tp3826236p3826236.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] Future events
An event represents something that already happened (past), so there is no such thing as a future event. You can have a fact that represents something that is scheduled to happen in the future, but that is not an event, and it can change as it is just data. Events are immutable. For instance: airport. You can have a flight scheduled to leave tomorrow at 08:00am, from gate B1. That schedule might change, because the flight can be delayed, cancelled, change gates, etc. It is just a fact in your system (e.g. ScheduledFlight). But when the flight actually departs the gate, then the system can have an event like FlightDepartedFromGate() that says the flight left the gate B1 at 08:02am. This is immutable, because it registers something that happened. Edson On Wed, Mar 14, 2012 at 1:44 PM, lexsoto lexs...@gmail.com wrote: Hello: I have this rule: An event is inserted that has a timestamp in the future, the rule is fired. This looks like a bug, because the sliding time window has not yet met the timestamp of the event. I expect the rule to fire not immediately but only when the time reaches the event time. Is my assumption/understanding correct? -- View this message in context: http://drools.46999.n3.nabble.com/Future-events-tp3826236p3826236.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 -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Future events
The reason is because the engine will not queue up events and wait for the correct time to deal with them. The engine assumes events always represent past times. But for past events, I am sure the window is respected. If you have a rule that counts the number of events in the last 5 hours, an event that happened 5 hours and 1 minute ago will not be in the total count. Edson On Wed, Mar 14, 2012 at 4:58 PM, lexsoto lexs...@gmail.com wrote: Thanks Edson for your reply, however I am still not clear about why the rule is firing if the time stamp of the event falls outside the time window. This can happen, for example, if the event originates in a machine with clock slightly ahead. I think the problem also occurs if the time is in the past; I would not want to take action on a future or old event. I understand that events are immutable, and I am not changing the event in any way. However, I expect the sliding time window to be changing along with the system clock until it reaches the timestamp of the event. My question still unanswered, why is the rule firing outside its time window? Is there a way to make this work? Any advice about how to address this use case? Thanks -- View this message in context: http://drools.46999.n3.nabble.com/Future-events-tp3826236p3826759.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 -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Nesting prefix-or and prefix-and causing parsing problem
Hi, I have a problem with nesting prefix-and and prefix-or. I found a bug in JIRA but it been fixed in drools expert 5.0. Here is snippet to reproduce the problem (based on the original rule). I get the following error : java.lang.RuntimeException: [48,5]: [ERR 102] Line 48:5 mismatched input 'EmployeePreferredShift' in rule assign-preferred-position declare EntityA number : int end declare EntityB number : int end declare EntityC number : int end rule and-or-snippet dialect java when EntityA( $number : number) not ( and EntityB ( number == $number ) ( or ( and EntityC ( number $number) not EntityB ( number == 4) ) not EntityC ( number == 10 ) ) EntityA ( number = $number ) ( or not EntityC ( number = $number) ( and EntityC ( number == 4 || number =10 ) not EntityB ( number == -3) not EntityB ( number == -10 ) ) ) not EntityB( number == 0) ) then System.out.println(Working); end Patrik Dufresne ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Future events
Well, yes that is how the engine works. But should it work this way? Why fire the rule if not in the appropriate time window? This still looks wrong to me, as the intention of the rule is not observed. On the per hand, the engine does queue events in other scenarios, so it seems arbritrary. Too bad because this would be a ver nice way to model scheduled events using the temporal operators. Thanks Edson -- View this message in context: http://drools.46999.n3.nabble.com/Future-events-tp3826236p3827065.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] Auto generating Schedule(curriculum) in drools-planner
Hi, guys! Approximately how many *time* takes generation of school-schedule in drools-planner if i have: 40 rooms and 42 periods(*period* contains /day of week/ and /time/(or lesson order)) *Planning entity:* Lesson(id,course,room,period) and facts... this important for me... -- View this message in context: http://drools.46999.n3.nabble.com/Auto-generating-Schedule-curriculum-in-drools-planner-tp3827828p3827828.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] [rule-users]Drools Fact Management with Large Dataset in RDBMS
Thank you in advance for your time reading this post first.
I have to make my rules work with databases with TB of data, so fact
management become a major issue when I design my system. Currently I have
several main programs which use both stateful and stateless sessions. I
would like to collect some good practices to manage the insertion and
disposal of facts so that I can keep my working memory healthy. Below are
some of my findings in this forum:
1. Insert only relevant facts into working memory with the use of data
preparation rule together with Drools pipeline (hibernate, mybatis, etc).
An excellent example from manstis in the post
http://drools.46999.n3.nabble.com/Applying-rules-on-the-data-in-an-RDBMS-td2468317.html#a2491888
-
rule bootstrap
salience -100
when
$list : List( ) from placeHolder.namedQuery(Smurfs)
then
for(ExternalObject o : $list ) {
insert( o );
}
end
2. Use insertlogical instead of insert when inserting facts in rule
3. Implement garbage collection rule to clean up unwanted facts
I would like to ask:
1. if there are any other suggestion on optimizing fact management?
2. is there a way for the rule engine to directly operate on data in
database (perhaps with some other plugin?)
Thanks again!
--
View this message in context:
http://drools.46999.n3.nabble.com/rule-users-Drools-Fact-Management-with-Large-Dataset-in-RDBMS-tp3827838p3827838.html
Sent from the Drools: User forum mailing list archive at Nabble.com.
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