[jboss-jira] [JBoss JIRA] (JBRULES-3617) NullpointerException in Accumulate when use query
Yingzhi Wang (JIRA)
jira-events at lists.jboss.org
Mon Sep 24 02:23:34 EDT 2012
[ https://issues.jboss.org/browse/JBRULES-3617?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Yingzhi Wang updated JBRULES-3617:
----------------------------------
Description:
FACT: Person
package test;
public class Person {
private String firstname;
private String secondname;
private String address;
public Person() {
}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getSecondname() {
return secondname;
}
public void setSecondname(String secondname) {
this.secondname = secondname;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
r1.drl:
package test1
import test.Person
import java.util.HashSet
query find(String $first, String $second)
p: Person(firstname == "111", secondname==$second)
end
rule "test"
no-loop true
when
$list: HashSet( size >= 0 )
from accumulate (
Person($addr: address, firstname=="Tom", secondname=="Cat"),
init ( HashSet set = new HashSet(); ),
action ( set.add($addr); ),
reverse ( set.remove($addr); ),
result(set) )
then
System.out.println("It' OK~!");
end
Test.java
package test;
import java.util.Collection;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderError;
import org.drools.builder.KnowledgeBuilderErrors;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.definition.KnowledgePackage;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.rule.FactHandle;
public class Test {
public static void main(String[] args) throws Exception {
new Test().test();
}
public void test() throws Exception {
KnowledgeBase base = KnowledgeBaseFactory.newKnowledgeBase();
StatefulKnowledgeSession s = base.newStatefulKnowledgeSession();
new Th(s).start();
Thread.sleep(2000);
KnowledgeBuilder builder = KnowledgeBuilderFactory.newKnowledgeBuilder();
builder.add(ResourceFactory.newClassPathResource("r1.drl", getClass()), ResourceType.DRL);
KnowledgeBuilderErrors errs = builder.getErrors();
if (!errs.isEmpty()) {
for (KnowledgeBuilderError e: errs) {
System.out.println(e.toString());
}
}
Collection<KnowledgePackage> col = builder.getKnowledgePackages();
base.addKnowledgePackages(col);
}
class Th extends Thread {
StatefulKnowledgeSession s;
public Th(StatefulKnowledgeSession s) {
this.s = s;
}
public void run() {
Person p = new Person();
p.setFirstname("Tom");
p.setSecondname("Cat");
p.setAddress("Mars");
FactHandle fact = s.insert(p);
int i=0;
while (true) {
s.update(fact, p);
s.fireAllRules();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {}
i++;
}
}
}
}
Run Test.java, will throws Exception:
Exception in thread "Thread-0" org.drools.RuntimeDroolsException: java.lang.NullPointerException
at org.drools.rule.Accumulate.reverse(Accumulate.java:212)
at org.drools.reteoo.AccumulateNode.removeMatch(AccumulateNode.java:902)
at org.drools.reteoo.AccumulateNode.modifyRightTuple(AccumulateNode.java:537)
at org.drools.reteoo.BetaNode.modifyObject(BetaNode.java:531)
at org.drools.reteoo.SingleObjectSinkAdapter.propagateModifyObject(SingleObjectSinkAdapter.java:68)
at org.drools.reteoo.AlphaNode.modifyObject(AlphaNode.java:157)
at org.drools.reteoo.SingleObjectSinkAdapter.propagateModifyObject(SingleObjectSinkAdapter.java:68)
at org.drools.reteoo.AlphaNode.modifyObject(AlphaNode.java:157)
at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateModifyObject(CompositeObjectSinkAdapter.java:507)
at org.drools.reteoo.CompositeObjectSinkAdapter.propagateModifyObject(CompositeObjectSinkAdapter.java:421)
at org.drools.reteoo.ObjectTypeNode.modifyObject(ObjectTypeNode.java:314)
at org.drools.reteoo.EntryPointNode.modifyObject(EntryPointNode.java:265)
at org.drools.common.NamedEntryPoint.update(NamedEntryPoint.java:470)
at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:960)
at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:933)
at org.drools.impl.StatefulKnowledgeSessionImpl.update(StatefulKnowledgeSessionImpl.java:284)
at test.Test$Th.run(Test.java:53)
Caused by: java.lang.NullPointerException
at test1.Rule_test_b59970efe0844a8d8797758b863454b1$Accumulate0.reverse(Rule_test_b59970efe0844a8d8797758b863454b1.java:52)
at test1.Rule_test_b59970efe0844a8d8797758b863454b1Accumulate0Invoker.reverse(Rule_test_b59970efe0844a8d8797758b863454b1Accumulate0Invoker.java:69)
at org.drools.rule.Accumulate.reverse(Accumulate.java:203)
... 16 more
But, if I change the query to like this:
query find(String $first, String $second)
p: Person(firstname == "111", secondname==$second)
end
It will be ok.
However if I change the query to like this:
query find(String $first, String $second)
p: Person(firstname == "Tom", secondname==$second)
end
It will throws Exception again.
firstname=="Tom" is a condition of rule "test"
was:
FACT: Person
package test;
public class Persion {
private String firstname;
private String secondname;
private String address;
public Persion() {
}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getSecondname() {
return secondname;
}
public void setSecondname(String secondname) {
this.secondname = secondname;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
r1.drl:
package test1
import test.Persion
import java.util.HashSet
query find(String $first, String $second)
p: Persion(firstname == "111", secondname==$second)
end
rule "test"
no-loop true
when
$list: HashSet( size >= 0 )
from accumulate (
Persion($addr: address, firstname=="Tom", secondname=="Cat"),
init ( HashSet set = new HashSet(); ),
action ( set.add($addr); ),
reverse ( set.remove($addr); ),
result(set) )
then
System.out.println("It' OK~!");
end
Test.java
package test;
import java.util.Collection;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderError;
import org.drools.builder.KnowledgeBuilderErrors;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.definition.KnowledgePackage;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.rule.FactHandle;
public class Test {
public static void main(String[] args) throws Exception {
new Test().test();
}
public void test() throws Exception {
KnowledgeBase base = KnowledgeBaseFactory.newKnowledgeBase();
StatefulKnowledgeSession s = base.newStatefulKnowledgeSession();
new Th(s).start();
Thread.sleep(2000);
KnowledgeBuilder builder = KnowledgeBuilderFactory.newKnowledgeBuilder();
builder.add(ResourceFactory.newClassPathResource("r1.drl", getClass()), ResourceType.DRL);
KnowledgeBuilderErrors errs = builder.getErrors();
if (!errs.isEmpty()) {
for (KnowledgeBuilderError e: errs) {
System.out.println(e.toString());
}
}
Collection<KnowledgePackage> col = builder.getKnowledgePackages();
base.addKnowledgePackages(col);
}
class Th extends Thread {
StatefulKnowledgeSession s;
public Th(StatefulKnowledgeSession s) {
this.s = s;
}
public void run() {
Persion p = new Persion();
p.setFirstname("Tom");
p.setSecondname("Cat");
p.setAddress("Mars");
FactHandle fact = s.insert(p);
int i=0;
while (true) {
s.update(fact, p);
s.fireAllRules();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {}
i++;
}
}
}
}
Run Test.java, will throws Exception:
Exception in thread "Thread-0" org.drools.RuntimeDroolsException: java.lang.NullPointerException
at org.drools.rule.Accumulate.reverse(Accumulate.java:212)
at org.drools.reteoo.AccumulateNode.removeMatch(AccumulateNode.java:902)
at org.drools.reteoo.AccumulateNode.modifyRightTuple(AccumulateNode.java:537)
at org.drools.reteoo.BetaNode.modifyObject(BetaNode.java:531)
at org.drools.reteoo.SingleObjectSinkAdapter.propagateModifyObject(SingleObjectSinkAdapter.java:68)
at org.drools.reteoo.AlphaNode.modifyObject(AlphaNode.java:157)
at org.drools.reteoo.SingleObjectSinkAdapter.propagateModifyObject(SingleObjectSinkAdapter.java:68)
at org.drools.reteoo.AlphaNode.modifyObject(AlphaNode.java:157)
at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateModifyObject(CompositeObjectSinkAdapter.java:507)
at org.drools.reteoo.CompositeObjectSinkAdapter.propagateModifyObject(CompositeObjectSinkAdapter.java:421)
at org.drools.reteoo.ObjectTypeNode.modifyObject(ObjectTypeNode.java:314)
at org.drools.reteoo.EntryPointNode.modifyObject(EntryPointNode.java:265)
at org.drools.common.NamedEntryPoint.update(NamedEntryPoint.java:470)
at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:960)
at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:933)
at org.drools.impl.StatefulKnowledgeSessionImpl.update(StatefulKnowledgeSessionImpl.java:284)
at test.Test$Th.run(Test.java:53)
Caused by: java.lang.NullPointerException
at test1.Rule_test_b59970efe0844a8d8797758b863454b1$Accumulate0.reverse(Rule_test_b59970efe0844a8d8797758b863454b1.java:52)
at test1.Rule_test_b59970efe0844a8d8797758b863454b1Accumulate0Invoker.reverse(Rule_test_b59970efe0844a8d8797758b863454b1Accumulate0Invoker.java:69)
at org.drools.rule.Accumulate.reverse(Accumulate.java:203)
... 16 more
But, if I change the query to like this:
query find(String $first, String $second)
p: Persion(firstname == "111", secondname==$second)
end
It will be ok.
However if I change the query to like this:
query find(String $first, String $second)
p: Persion(firstname == "Tom", secondname==$second)
end
It will throws Exception again.
firstname=="Tom" is a condition of rule "test"
> NullpointerException in Accumulate when use query
> -------------------------------------------------
>
> Key: JBRULES-3617
> URL: https://issues.jboss.org/browse/JBRULES-3617
> Project: Drools
> Issue Type: Bug
> Security Level: Public(Everyone can see)
> Components: drools-core (expert)
> Affects Versions: 5.4.0.Final
> Environment: OS: Windows xp
> IDE: Eclipse
> JRE: 1.6
> Reporter: Yingzhi Wang
> Assignee: Mark Proctor
> Priority: Critical
> Labels: Accumulate, query, reverse
>
> FACT: Person
> package test;
> public class Person {
>
> private String firstname;
> private String secondname;
> private String address;
>
> public Person() {
> }
>
> public String getFirstname() {
> return firstname;
> }
> public void setFirstname(String firstname) {
> this.firstname = firstname;
> }
> public String getSecondname() {
> return secondname;
> }
> public void setSecondname(String secondname) {
> this.secondname = secondname;
> }
> public String getAddress() {
> return address;
> }
> public void setAddress(String address) {
> this.address = address;
> }
>
> }
> r1.drl:
> package test1
> import test.Person
> import java.util.HashSet
> query find(String $first, String $second)
> p: Person(firstname == "111", secondname==$second)
> end
> rule "test"
> no-loop true
> when
> $list: HashSet( size >= 0 )
> from accumulate (
> Person($addr: address, firstname=="Tom", secondname=="Cat"),
> init ( HashSet set = new HashSet(); ),
> action ( set.add($addr); ),
> reverse ( set.remove($addr); ),
> result(set) )
> then
> System.out.println("It' OK~!");
> end
> Test.java
> package test;
> import java.util.Collection;
> import org.drools.KnowledgeBase;
> import org.drools.KnowledgeBaseFactory;
> import org.drools.builder.KnowledgeBuilder;
> import org.drools.builder.KnowledgeBuilderError;
> import org.drools.builder.KnowledgeBuilderErrors;
> import org.drools.builder.KnowledgeBuilderFactory;
> import org.drools.builder.ResourceType;
> import org.drools.definition.KnowledgePackage;
> import org.drools.io.ResourceFactory;
> import org.drools.runtime.StatefulKnowledgeSession;
> import org.drools.runtime.rule.FactHandle;
> public class Test {
> public static void main(String[] args) throws Exception {
> new Test().test();
> }
>
> public void test() throws Exception {
> KnowledgeBase base = KnowledgeBaseFactory.newKnowledgeBase();
> StatefulKnowledgeSession s = base.newStatefulKnowledgeSession();
> new Th(s).start();
> Thread.sleep(2000);
>
> KnowledgeBuilder builder = KnowledgeBuilderFactory.newKnowledgeBuilder();
> builder.add(ResourceFactory.newClassPathResource("r1.drl", getClass()), ResourceType.DRL);
> KnowledgeBuilderErrors errs = builder.getErrors();
> if (!errs.isEmpty()) {
> for (KnowledgeBuilderError e: errs) {
> System.out.println(e.toString());
> }
> }
> Collection<KnowledgePackage> col = builder.getKnowledgePackages();
> base.addKnowledgePackages(col);
> }
>
> class Th extends Thread {
> StatefulKnowledgeSession s;
> public Th(StatefulKnowledgeSession s) {
> this.s = s;
> }
> public void run() {
> Person p = new Person();
> p.setFirstname("Tom");
> p.setSecondname("Cat");
> p.setAddress("Mars");
> FactHandle fact = s.insert(p);
> int i=0;
> while (true) {
> s.update(fact, p);
> s.fireAllRules();
> try {
> Thread.sleep(1000);
> } catch (InterruptedException e) {}
> i++;
> }
> }
> }
> }
> Run Test.java, will throws Exception:
> Exception in thread "Thread-0" org.drools.RuntimeDroolsException: java.lang.NullPointerException
> at org.drools.rule.Accumulate.reverse(Accumulate.java:212)
> at org.drools.reteoo.AccumulateNode.removeMatch(AccumulateNode.java:902)
> at org.drools.reteoo.AccumulateNode.modifyRightTuple(AccumulateNode.java:537)
> at org.drools.reteoo.BetaNode.modifyObject(BetaNode.java:531)
> at org.drools.reteoo.SingleObjectSinkAdapter.propagateModifyObject(SingleObjectSinkAdapter.java:68)
> at org.drools.reteoo.AlphaNode.modifyObject(AlphaNode.java:157)
> at org.drools.reteoo.SingleObjectSinkAdapter.propagateModifyObject(SingleObjectSinkAdapter.java:68)
> at org.drools.reteoo.AlphaNode.modifyObject(AlphaNode.java:157)
> at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateModifyObject(CompositeObjectSinkAdapter.java:507)
> at org.drools.reteoo.CompositeObjectSinkAdapter.propagateModifyObject(CompositeObjectSinkAdapter.java:421)
> at org.drools.reteoo.ObjectTypeNode.modifyObject(ObjectTypeNode.java:314)
> at org.drools.reteoo.EntryPointNode.modifyObject(EntryPointNode.java:265)
> at org.drools.common.NamedEntryPoint.update(NamedEntryPoint.java:470)
> at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:960)
> at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:933)
> at org.drools.impl.StatefulKnowledgeSessionImpl.update(StatefulKnowledgeSessionImpl.java:284)
> at test.Test$Th.run(Test.java:53)
> Caused by: java.lang.NullPointerException
> at test1.Rule_test_b59970efe0844a8d8797758b863454b1$Accumulate0.reverse(Rule_test_b59970efe0844a8d8797758b863454b1.java:52)
> at test1.Rule_test_b59970efe0844a8d8797758b863454b1Accumulate0Invoker.reverse(Rule_test_b59970efe0844a8d8797758b863454b1Accumulate0Invoker.java:69)
> at org.drools.rule.Accumulate.reverse(Accumulate.java:203)
> ... 16 more
> But, if I change the query to like this:
> query find(String $first, String $second)
> p: Person(firstname == "111", secondname==$second)
> end
> It will be ok.
> However if I change the query to like this:
> query find(String $first, String $second)
> p: Person(firstname == "Tom", secondname==$second)
> end
> It will throws Exception again.
> firstname=="Tom" is a condition of rule "test"
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