error on retracting fact on drools 5.0.1
by Garner, Shawn
I have a rule and it is supposed to retract two objects
when
$objectOne : ObjectOne(...)
$objectTwo : ObjectTwo(...)
then
retract($objectOne);
#retract($objectTwo);
end
No matter what I do I can't ever retract objectTwo.
I put a print statement and it is there.
If I comment out the retraction of objectTwo it works fine.
I tried just retraction of objectTwo and that fails too.
I tried prefixing with drools.retract.
I get this:
com.principal.health.rules.RulesException: Root exception: [Error: drools.retract($objectTwo): null]
[Near : {... Unknown ....}]
^
[Line: 1, Column: 0] - [Error: drools.retract($objectTwo): null]
[Near : {... Unknown ....}]
^
[Line: 1, Column: 0]
at com.principal.health.rules.impl.DroolsRuleSetImpl.fireRuleflow(DroolsRuleSetImpl.java:100)
at com.principal.health.rules.RulesTestCase.executeRules(RulesTestCase.java:247)
at com.principal.health.rules.RulesTestCase.executeAvailableRules(RulesTestCase.java:129)
at com.principal.health.rules.impl.available.MemberNetworkXFormRulesRuleId6Test.retractMemberNetworkContractWithNullTeminationDates(MemberNetworkXFormRulesRuleId6Test.java:235)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:618)
at org.junit.internal.runners.TestMethodRunner.executeMethodBody(TestMethodRunner.java:99)
at org.junit.internal.runners.TestMethodRunner.runUnprotected(TestMethodRunner.java:81)
at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
at org.junit.internal.runners.TestMethodRunner.runMethod(TestMethodRunner.java:75)
at org.junit.internal.runners.TestMethodRunner.run(TestMethodRunner.java:45)
at org.junit.internal.runners.TestClassMethodsRunner.invokeTestMethod(TestClassMethodsRunner.java:71)
at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:35)
at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:38)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: org.drools.runtime.rule.ConsequenceException: [Error: drools.retract($wrappedNetwork): null]
[Near : {... Unknown ....}]
^
[Line: 1, Column: 0]
at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:23)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:943)
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:885)
at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1086)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:660)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:627)
at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:183)
at com.principal.health.rules.impl.DroolsRuleSetImpl.fireRuleflow(DroolsRuleSetImpl.java:91)
... 23 more
Caused by: [Error: drools.retract($wrappedNetwork): null]
[Near : {... Unknown ....}]
^
[Line: 1, Column: 0]
at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:374)
at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:138)
at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:133)
at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85)
at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:104)
at org.mvel2.MVEL.executeExpression(MVEL.java:978)
at org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:87)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:934)
... 29 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:618)
at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:931)
at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:316)
... 36 more
Caused by: java.lang.AssertionError: null
at org.junit.Assert.fail(Assert.java:69)
at org.junit.Assert.assertTrue(Assert.java:32)
at org.junit.Assert.assertTrue(Assert.java:41)
at com.principal.health.rules.impl.available.MemberNetworkXFormRulesRuleId6Test$2.objectRetracted(MemberNetworkXFormRulesRuleId6Test.java:221)
at org.drools.impl.StatefulKnowledgeSessionImpl$WorkingMemoryEventListenerWrapper.objectRetracted(StatefulKnowledgeSessionImpl.java:501)
at org.drools.event.WorkingMemoryEventSupport.fireObjectRetracted(WorkingMemoryEventSupport.java:89)
at org.drools.common.AbstractWorkingMemory.retract(AbstractWorkingMemory.java:1186)
at org.drools.base.DefaultKnowledgeHelper.retract(DefaultKnowledgeHelper.java:158)
at org.drools.base.DefaultKnowledgeHelper.retract(DefaultKnowledgeHelper.java:172)
... 42 more
SDG
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14 years, 11 months
Advice needed on a Design problem - Orderly execution of rules based on a ruleflow-group and a ruleflow "template" where rule-flow-group is only known at runtime
by Pritam
We have an interesting problem for our site design where we're using drools
as a filtering mechanism to "include" a specific content on the site
(content being a snippet of html).
I need to compile a knowledge base from a root folder, recursively.
- \site.drl
- \some-section\some-section.drl
- \some-section\some-page1.drl
- \some-section\some-page1-default.drl
- \some-section\some-page2.drl
- \some-section\some-page2-default.drl
- \some-section\.....
- \another-section\another-section.drl
- \another-section\blah-page1.drl
- \another-section\blah-page1-default.drl
- \another-section\blah-page2.drl
- \another-section\blah-page2-default.drl
- ....
Assume, a few hundred rule files from the above folder structure, each rule
file having rules with a ruleflow-group corresponding to it's folder
structure.
At any point, if I fire the rules (using StatelessKnowledgeSession), I
expect a rule flow something this:
<START>
|
site
|
section*
|
<XOR>
/ \
page* page-default*
\ /
\ /
<JOIN>
|
<END>
* this ruleflow-group name is dynamic (corresponding to its folder
structure)
As you see, I have a "template" for a rule-flow execution, but my
ruleflow-group name is only known at runtime since it's dependent on the
underling folder structure and not known at ruleflow-definition. I do
however know the folder structure before execution (since you can always
build this via file io using a bootstrap into memory) and the name of the
rule file since I follow a strict naming convention matching the URI of the
http request (which in turn matches the file structure).
How do I build this kind of rule flow execution using rule-flows? Can I
programmatically construct the rule flow and store it in memory?
Also, assume a knowledge base of hundreds of rules, how do I execute a
specific rulegroup using the StatelessKnowledgeSession api (I can't see any)
from that KnowledgeBase?
Thanks
--
View this message in context: http://n3.nabble.com/Advice-needed-on-a-Design-problem-Orderly-execution-...
Sent from the Drools - User mailing list archive at Nabble.com.
14 years, 11 months
Problems with GWT WebProject and Drools5.0!
by vamshidhar reddy chitti
Hi All,
I have integrated drools rule engine 5.0 with GWT WebProject. When I try to call the rule engine from GWT Applicaiton Engine, I get following exception
java.security.AccessControlException: access denied (java.io.FilePermission C:\Documents and Settings\vamshidharc\drools.packagebuilder.conf read)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
at java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:139)
at java.lang.SecurityManager.checkRead(SecurityManager.java:871)
at java.io.File.exists(File.java:731)
at org.drools.util.ChainedProperties.loadProperties(ChainedProperties.java:243)
at org.drools.util.ChainedProperties.<init>(ChainedProperties.java:69)
at org.drools.util.ChainedProperties.<init>(ChainedProperties.java:41)
at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:167)
at org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:153)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:242)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:142)
at org.drools.builder.impl.KnowledgeBuilderProviderImpl.newKnowledgeBuilder(KnowledgeBuilderProviderImpl.java:29)
at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:29)
at com.cura.test.server.RuleEngineInvoker.readKnowledgeBase(RuleEngineInvoker.java:72)
at com.cura.test.server.RuleEngineInvoker.invokeRuleEngine(RuleEngineInvoker.java:51)
at com.cura.test.server.GreetingServiceImpl.getDept(GreetingServiceImpl.java:25)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:527)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:166)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:121)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:54)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:313)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:844)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:205)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
does anyone hav idea?
tnx in advance
bye
vamshi
14 years, 11 months
Integrating rules with your applications +Changeset.xml
by Nilima R
Can anyone explain/example how to use changeset.xls to integrate with the
rules I have written in Guvnor.Need to use Drools API for Integrating
rules with java application
At present am using the below code
Properties properties = new Properties();
InputStream stream = rulesServlet.class
.getResourceAsStream ("/com/opensource/rules.properties");
properties.load(stream);
RuleAgent agent = RuleAgent.newRuleAgent
(properties);
RuleBase base = agent.getRuleBase();
FactType customer = base.getFactType(
"myPackage.Customer");
Object cust1 = customer.newInstance();
customer.set(cust1, "totalIntemsPrice", price);
base.newStatelessSession().execute(cust1);
System.out.println("Discount is a "+
customer.get(cust1, "discount"));
The documentation is not pretty clear.
Nilima
____________________________________________
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Business Solutions
Outsourcing
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14 years, 11 months
JIRA case for parser errors with nested boolean prefixAnd/Or expressions
by Axelrod, Nelson
Hi Edson,
I added the JIRA ticket below regarding the bug with the nested
prefixAnd/Or expressions
https://jira.jboss.org/jira/browse/JBRULES-2414
as a subticket to a similar issue described here
https://jira.jboss.org/jira/browse/JBRULES-2383
Thank you!
Nelson
------------------------------
Message: 4
Date: Tue, 19 Jan 2010 17:01:41 -0500
From: Edson Tirelli <ed.tirelli(a)gmail.com>
Subject: Re: [rules-users] rules-users Digest, Vol 38, Issue 58
To: Rules Users List <rules-users(a)lists.jboss.org>
Message-ID:
<e6dd5ba31001191401r67ddf877o7e9619ba0d23b281(a)mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Yes, the good news is that it is clearly a parsing error, what makes
it
easy to fix. Do you mind opening a JIRA and attaching a test case or the
info from your e-mails?
Thanks,
Edson
14 years, 11 months
Accumulate + Temporal Operators
by Paul R.
Hi,
I'm using accumulate with sliding windows to verify that certain event
conditions are present for a specified period of time, which works fine,
however
I need to verify that both conditions are present at the same time, i.e
Foo.value > 1 for 10 seconds and Bar.value < 1 for 10 seconds. There doesn't
appear to be an obvious way to use the temporal operators in this situation.
Can anybody offer any suggestions?
rule test no-loop true
when
$f : Double(doubleValue > 1.0) from accumulate( Foo($v : value) over
window:time ( 10s )
from entry-point EntryPoint, min($v))
$b : Double(doubleValue < 1.0) from accumulate( Bar($v : value) over
window:time ( 10s )
from entry-point EntryPoint, max($v))
then
// ...
end
Any help greatly appreciated.
Thanks,
Paul
14 years, 11 months
