Drools fusión returns NullPointerException
Hi everyone.
I'm trying to make a twitter app using mule+drools fusion, but I'm getting a null pointer exception in the rhs of one specific rule, "Tweet a caso sospechoso." I can't figure out.
I think that the drools engine is retracting tweet events early. When I need to use a tweet event in the rhs, the event doesn't exist any more.
import clases.*;
declare Tweet
@role ( event )
end
declare Gripe
@role ( event )
end
declare Sospechoso
@role ( event )
end
rule "Tweet a Gripe"
when
$t:Tweet($us:usuario, texto matches "\.*gripe.*") from entry-point "Flujo Tweets"
not (Gripe(usuario==$us) from entry-point "Casos Confirmados")
then
Sospechoso s = new Sospechoso(TiposSintomas.GRIPE,$t);
Gripe g = new Gripe(s);
entryPoints["Casos Confirmados"].insert(g);
mule.generateMessage("alerts",g, null, MessageExchangePattern.ONE_WAY);
end
rule "Tweet a caso sospechoso"
when
$t:Tweet(texto not matches "\.*gripe.*",$us:usuario,$txt:texto) from entry-point "Flujo Tweets"
$s:SintomaGripe($t.texto matches regexp)
not (Sospechoso(usuario==$us) from entry-point "Casos Sospechosos")
not (Gripe(usuario==$us) from entry-point "Casos Confirmados")
then
Sospechoso s = new Sospechoso($s.getTipo(),$t);
entryPoints["Casos Sospechosos"].insert(s);
mule.generateMessage("alerts",s, null, MessageExchangePattern.ONE_WAY);
end
rule "Sospechosos a Gripe"
when
$s:Sospechoso($us:usuario) from entry-point "Casos Sospechosos"
not(Gripe(usuario==$us) from entry-point "Casos Confirmados")
$casos:ArrayList(size >= 3)
from collect (Sospechoso(usuario==$us) from entry-point "Casos Sospechosos")
then
Gripe g = new Gripe($casos);
entryPoints["Casos Confirmados"].insert(g);
mule.generateMessage("alerts",g, null, MessageExchangePattern.ONE_WAY);
end
Stacktrace
ERROR 2012-11-25 13:28:29,655 [[ceptwitter].Flujo1.stage2.02] org.mule.exception.DefaultMessagingExceptionStrategy:
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Message : Failed to invoke RulesComponent{Flujo1.commponent.22081703}. Component that caused exception is: RulesComponent{Flujo1.commponent.22081703}. Message payload is of type: Tweet
Type : org.mule.component.ComponentException
Code : MULE_ERROR--2
Payload : clases.Tweet@154283a
JavaDoc : http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/component/ComponentException.html
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Exception stack is:
1. null (java.lang.NullPointerException)
clases.Tweet:8 (null)
2. java.lang.NullPointerException (org.drools.runtime.rule.ConsequenceException)
org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler:23 (null)
3. Failed to invoke RulesComponent{Flujo1.commponent.22081703}. Component that caused exception is: RulesComponent{Flujo1.commponent.22081703}. Message payload is of type: Tweet (org.mule.component.ComponentException)
org.mule.component.AbstractComponent:148 (http://www.mulesoft.org/docs/site/current3/apidocs/org/mule/component/ComponentException.html)
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Root Exception stack trace:
java.lang.NullPointerException
at clases.Tweet.<init>(Tweet.java:8)
at clases.Sospechoso.<init>(Sospechoso.java:9)
at defaultpkg.Rule_Tweet_a_caso_sospechoso_0.consequence(Rule_Tweet_a_caso_sospechoso_0.java:7)
at defaultpkg.Rule_Tweet_a_caso_sospechoso_0ConsequenceInvoker.evaluate(Rule_Tweet_a_caso_sospechoso_0ConsequenceInvoker.java:29)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:934)
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 org.mule.module.drools.Drools.assertEvent(Drools.java:167)
at org.mule.module.bpm.Rules.handleEvent(Rules.java:131)
at org.mule.module.bpm.RulesComponent.doInvoke(RulesComponent.java:84)
at org.mule.component.AbstractComponent.invokeInternal(AbstractComponent.java:126)
at org.mule.component.AbstractComponent.access$000(AbstractComponent.java:61)
at org.mule.component.AbstractComponent$1$1.process(AbstractComponent.java:242)
at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:43)
at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:43)
at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:43)
at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:43)
at org.mule.component.AbstractComponent.process(AbstractComponent.java:160)
at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
at org.mule.execution.MessageProcessorNotificationExecutionInterceptor.execute(MessageProcessorNotificationExecutionInterceptor.java:43)
at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:43)
at org.mule.execution.ExceptionToMessagingExceptionExecutionInterceptor.execute(ExceptionToMessagingExceptionExecutionInterceptor.java:27)
at org.mule.execution.MessageProcessorExecutionTemplate.execute(MessageProcessorExecutionTemplate.java:43)
at org.mule.interceptor.AbstractEnvelopeInterceptor.process(AbstractEnvelopeInterceptor.java:55)
at org.mule.processor.AsyncInterceptingMessageProcessor.processNextTimed(AsyncInterceptingMessageProcessor.java:116)
at org.mule.processor.AsyncInterceptingMessageProcessor$AsyncMessageProcessorWorker$1.process(AsyncInterceptingMessageProcessor.java:171)
at org.mule.processor.AsyncInterceptingMessageProcessor$AsyncMessageProcessorWorker$1.process(AsyncInterceptingMessageProcessor.java:165)
at org.mule.execution.ExecuteCallbackInterceptor.execute(ExecuteCallbackInterceptor.java:20)
at org.mule.execution.HandleExceptionInterceptor.execute(HandleExceptionInterceptor.java:34)
at org.mule.execution.HandleExceptionInterceptor.execute(HandleExceptionInterceptor.java:18)
at org.mule.execution.BeginAndResolveTransactionInterceptor.execute(BeginAndResolveTransactionInterceptor.java:58)
at org.mule.execution.ResolvePreviousTransactionInterceptor.execute(ResolvePreviousTransactionInterceptor.java:48)
at org.mule.execution.SuspendXaTransactionInterceptor.execute(SuspendXaTransactionInterceptor.java:54)
at org.mule.execution.ValidateTransactionalStateInterceptor.execute(ValidateTransactionalStateInterceptor.java:44)
at org.mule.execution.IsolateCurrentTransactionInterceptor.execute(IsolateCurrentTransactionInterceptor.java:44)
at org.mule.execution.ExternalTransactionInterceptor.execute(ExternalTransactionInterceptor.java:52)
at org.mule.execution.RethrowExceptionInterceptor.execute(RethrowExceptionInterceptor.java:32)
at org.mule.execution.RethrowExceptionInterceptor.execute(RethrowExceptionInterceptor.java:17)
at org.mule.execution.TransactionalErrorHandlingExecutionTemplate.execute(TransactionalErrorHandlingExecutionTemplate.java:113)
at org.mule.execution.TransactionalErrorHandlingExecutionTemplate.execute(TransactionalErrorHandlingExecutionTemplate.java:34)
at org.mule.processor.AsyncInterceptingMessageProcessor$AsyncMessageProcessorWorker.doRun(AsyncInterceptingMessageProcessor.java:164)
at org.mule.work.AbstractMuleEventWork.run(AbstractMuleEventWork.java:43)
at org.mule.work.WorkerContext.run(WorkerContext.java:311)
at java.util.concu...
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