4:53 p.m.
I am currently using Drools to validate an extensive object graph.
When I validate a transient object graph (i.e., not persisted via
Hibernate) inside of a JUnit test method, validation occurs
successfully. However, when I retrieve the same object graph from
Hibernate and subsequently validate it, I get the stack trace that
I've included below, but only when I use shadow proxies. When I turn
shadow proxies off, validation runs successfully against the persisted
object graph again. Of course, I'm utilizing lazy association
fetching to improve performance and want to continue utilizing it.
Has anyone run into this same problem, and if so, were you able to
work around it without turning shadow proxies off? Before you ask, my
Hibernate session is open before and after I invoke Drools to perform
validation in the same unit of work (i.e., transaction), so it's not
an issue of not having an active Hibernate session available (I've
verified this through testing).
One more thing. The user guide says that if shadow proxies are turned
off that modifyRetract() should be called before an object is modified
and modifyAssert() should be called after it is modifed. First, what
is the method parameter to these two overloaded methods, Object or
FactHandle (both exist)? Second, I don't see modifyAssert() available
in the library, just modifyInsert(). Should the documentation change
to read modifyInsert() instead of modifyAssert()? If so, again with
which parameter?
I appreciate any insight you may have!
Here's the stack trace:
org.hibernate.LazyInitializationException: failed to lazily initialize
a collection, no session or session was closed
at
org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)
at
org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350)
at
org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:343)
at org.hibernate.collection.PersistentSet.addAll(PersistentSet.java:244)
at org.drools.util.ShadowProxyUtils.cloneObject(ShadowProxyUtils.java:76)
at com.cbi.domain.loan.indirect.IndirectLoanShadowProxy.getCustomers(Unknown
Source)
at
org.drools.base.com.cbi.domain.loan.indirect.IndirectLoan28409161$getCustomers.getValue(Unknown
Source)
at org.drools.base.ClassFieldExtractor.getValue(ClassFieldExtractor.java:127)
at org.drools.rule.Declaration.getValue(Declaration.java:198)
at
LoanValidationBusinessRules.Rule_A_Loan_must_have_at_least_one_Customer_0Eval0Invoker.evaluate(Rule_A_Loan_must_have_at_least_one_Customer_0Eval0Invoker.java:12)
at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:72)
at org.drools.reteoo.EvalConditionNode.assertTuple(EvalConditionNode.java:145)
at
org.drools.reteoo.CompositeTupleSinkAdapter.createAndPropagateAssertTuple(CompositeTupleSinkAdapter.java:73)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:116)
at
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:318)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153)
at org.drools.reteoo.Rete.assertObject(Rete.java:175)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192)
at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:909)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:881)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:682)
at
com.cbi.service.loan.indirect.impl.DroolsBusinessRulesServiceHelper.executeRules(DroolsBusinessRulesServiceHelper.java:77)
at
com.cbi.service.loan.indirect.impl.DroolsBusinessRulesServiceHelper.validate(DroolsBusinessRulesServiceHelper.java:66)
at
com.cbi.service.loan.indirect.impl.DroolsBusinessRulesServiceImpl.validate(DroolsBusinessRulesServiceImpl.java:97)
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:585)
at
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy4.validate(Unknown Source)
at
com.cbi.service.loan.indirect.impl.IndirectLoanManagementServiceImpl.submitForBooking(IndirectLoanManagementServiceImpl.java:680)
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:585)
at
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy6.submitForBooking(Unknown Source)
at
com.cbi.service.loan.indirect.impl.LoanManagementServiceImplTestCase.testSubmitLoanForBooking(LoanManagementServiceImplTestCase.java:116)
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:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at org.springframework.test.ConditionalTestCase.runBare(ConditionalTestCase.java:69)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
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:585)
at org.apache.maven.surefire.junit.JUnitTestSet.execute(JUnitTestSet.java:213)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:127)
at org.apache.maven.surefire.Surefire.run(Surefire.java:177)
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:585)
at
org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:338)
at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:997)
2008-04-02 16:48:32,691 ERROR
org.hibernate.LazyInitializationException - failed to lazily
initialize a collection, no session or session was closed
org.hibernate.LazyInitializationException: failed to lazily initialize
a collection, no session or session was closed
at
org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)
at
org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350)
at
org.hibernate.collection.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:97)
at org.hibernate.collection.PersistentSet.isEmpty(PersistentSet.java:146)
at
LoanValidationBusinessRules.Rule_A_Loan_must_have_at_least_one_Customer_0.eval0(Rule_A_Loan_must_have_at_least_one_Customer_0.java:38)
at
LoanValidationBusinessRules.Rule_A_Loan_must_have_at_least_one_Customer_0Eval0Invoker.evaluate(Rule_A_Loan_must_have_at_least_one_Customer_0Eval0Invoker.java:16)
at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:72)
at org.drools.reteoo.EvalConditionNode.assertTuple(EvalConditionNode.java:145)
at
org.drools.reteoo.CompositeTupleSinkAdapter.createAndPropagateAssertTuple(CompositeTupleSinkAdapter.java:73)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:116)
at
org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:318)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153)
at org.drools.reteoo.Rete.assertObject(Rete.java:175)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192)
at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:909)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:881)
at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:682)
at
com.cbi.service.loan.indirect.impl.DroolsBusinessRulesServiceHelper.executeRules(DroolsBusinessRulesServiceHelper.java:77)
at
com.cbi.service.loan.indirect.impl.DroolsBusinessRulesServiceHelper.validate(DroolsBusinessRulesServiceHelper.java:66)
at
com.cbi.service.loan.indirect.impl.DroolsBusinessRulesServiceImpl.validate(DroolsBusinessRulesServiceImpl.java:97)
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:585)
at
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy4.validate(Unknown Source)
at
com.cbi.service.loan.indirect.impl.IndirectLoanManagementServiceImpl.submitForBooking(IndirectLoanManagementServiceImpl.java:680)
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:585)
at
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy6.submitForBooking(Unknown Source)
at
com.cbi.service.loan.indirect.impl.LoanManagementServiceImplTestCase.testSubmitLoanForBooking(LoanManagementServiceImplTestCase.java:116)
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:585)
at junit.framework.TestCase.runTest(TestCase.java:164)
at junit.framework.TestCase.runBare(TestCase.java:130)
at org.springframework.test.ConditionalTestCase.runBare(ConditionalTestCase.java:69)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:120)
at junit.framework.TestSuite.runTest(TestSuite.java:230)
at junit.framework.TestSuite.run(TestSuite.java:225)
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:585)
at org.apache.maven.surefire.junit.JUnitTestSet.execute(JUnitTestSet.java:213)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:127)
at org.apache.maven.surefire.Surefire.run(Surefire.java:177)
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:585)
at
org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:338)
at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:997)
5:27 p.m.
It seems the docs need to be updated. Would you plz open a JIRA to fix
the place you are seeing this info?
For more current info, take a look at this blog post, specially the end
on "how to disable shadow facts":
http://blog.athico.com/2008/02/shadow-facts-what-you-always-wanted-to.html
[]s
Edson
2008/4/2, Keith Bennett <forthwind(a)gmail.com>:
--
Edson Tirelli
JBoss Drools Core Development
Office: +55 11 3529-6000
Mobile: +55 11 9287-5646
JBoss, a division of Red Hat @ www.jboss.com
9:19 a.m.
Edson,
Thanks for the reply. I took a look at your post regarding how to
retract then modify the fact, but I have a different situation. I
need to modify the fact via a function call. This is because inside
the function I have access to Spring-managed services that I use to
retrieve domain objects from the data access layer that I can then set
(i.e., modify) on the domain object (or fact, as referred to in
Drools). So, right now, my consequence looks like the following:
drools.modifyRetract($loan);
functionNameThatModifiesLoan($loan);
drools.modifyInsert($loan);
Does this, in effect, do the same thing that your posting shows how to
do. In other words, can I retract the fact, modify it, then insert it
back into the Drools engine this way?
BTW, I will be more than happy to open a JIRA. I just want to make
sure that what I am doing in my consequence is correct first since the
modifyRetract() and modifyAssert(), which will be changed to
modifyInsert() via the JIRA, is how the user guide currently describes
how this should be done, not the way your posting describes.
On 4/2/08, Edson Tirelli <tirelli(a)post.com> wrote:
9:41 a.m.
Yes, inside the consequence you can use the single parameter modify
because the engine knows how to find the fact handle.
In reality, the modify() block:
modify( $fact ) {
...
}
Is nothing more than a parsing feature that gets rewritten as:
drools.modifyRetract($fact);
...
drools.modifyInsert($fact);
[]s
Edson
2008/4/3, Keith Bennett <forthwind(a)gmail.com>:
--
Edson Tirelli
JBoss Drools Core Development
Office: +55 11 3529-6000
Mobile: +55 11 9287-5646
JBoss, a division of Red Hat @ www.jboss.com
6202
days inactive
6203
days old
3 comments
2 participants
participants (2)
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Edson Tirelli -
Keith Bennett