Kris, thanks for your answer... I've tried to access the variable in a split constraint (return count != 1;) with mvel dialect and I got this trace in runtime:
Uncaught exception on client java.lang.RuntimeException: unable to execute ReturnValueEvaluator at org.drools.workflow.instance.impl.ReturnValueConstraintEvaluator.evaluate(ReturnValueConstraintEvaluator.java:124) at org.drools.workflow.instance.node.SplitInstance.internalTrigger(SplitInstance.java:62) at org.drools.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:111) at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:141) at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:128) at org.drools.workflow.instance.impl.ExtendedNodeInstanceImpl.triggerCompleted(ExtendedNodeInstanceImpl.java:37) at org.drools.workflow.instance.node.EventBasedNodeInstance.triggerCompleted(EventBasedNodeInstance.java:96) at org.drools.workflow.instance.node.EventBasedNodeInstance.triggerCompleted(EventBasedNodeInstance.java:77) at org.drools.workflow.instance.node.WorkItemNodeInstance.triggerCompleted(WorkItemNodeInstance.java:192) at org.drools.workflow.instance.node.HumanTaskNodeInstance.triggerCompleted(HumanTaskNodeInstance.java:74) at org.drools.workflow.instance.node.WorkItemNodeInstance.workItemCompleted(WorkItemNodeInstance.java:246) at org.drools.workflow.instance.node.WorkItemNodeInstance.signalEvent(WorkItemNodeInstance.java:222) at org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.signalEvent(WorkflowProcessInstanceImpl.java:258) at org.drools.process.instance.impl.DefaultWorkItemManager.completeWorkItem(DefaultWorkItemManager.java:96) at org.drools.process.workitem.wsht.WSHumanTaskHandler$GetCompletedTaskResponseHandler.execute(WSHumanTaskHandler.java:282) at org.drools.task.service.TaskClientHandler.messageReceived(TaskClientHandler.java:67) at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:752) at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414) at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:49) at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:832) at org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:379) at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:173) at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414) at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilterChain.java:49) at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:832) at org.apache.mina.core.filterchain.DefaultIoFilterChain$HeadFilter.messageReceived(DefaultIoFilterChain.java:616) at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:414) at org.apache.mina.core.filterchain.DefaultIoFilterChain.fireMessageReceived(DefaultIoFilterChain.java:408) at org.apache.mina.core.polling.AbstractPollingIoProcessor.read(AbstractPollingIoProcessor.java:578) at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:540) at org.apache.mina.core.polling.AbstractPollingIoProcessor.process(AbstractPollingIoProcessor.java:532) at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:58) at org.apache.mina.core.polling.AbstractPollingIoProcessor$Worker.run(AbstractPollingIoProcessor.java:857) at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String at org.mvel2.math.MathProcessor.getInternalNumberFromType(MathProcessor.java:555) at org.mvel2.math.MathProcessor._doOperations(MathProcessor.java:155) at org.mvel2.math.MathProcessor.doOperations(MathProcessor.java:79) at org.mvel2.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:102) at org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:37) at org.mvel2.ast.ReturnNode.getReducedValueAccelerated(ReturnNode.java:45) at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85) at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:107) at org.mvel2.MVEL.executeExpression(MVEL.java:978) at org.drools.base.mvel.MVELReturnValueEvaluator.evaluate(MVELReturnValueEvaluator.java:110) at org.drools.workflow.instance.impl.ReturnValueConstraintEvaluator.evaluate(ReturnValueConstraintEvaluator.java:121) ... 36 more With Java dialect I got a problem when I add the rule flow to the KnowledgeBuilderFactory: java.lang.RuntimeException: Process Compilation error : org.drools.lang.descr.processde...@69695f com/sample/Process_com_sample_0.java (9:387) : Incompatible operand types String and int at com.sample.ProcessTest.readKnowledgeBase(ProcessTest.java:81) at com.sample.ProcessTest.main(ProcessTest.java:30) Using action node, I could get the variable process with mvel dialect in action just calling: System.out.println("The counting is: " + count); If I use Java dialect with the same System.out, I got this problem after add the rule flow to the KnowledgeBuilderFactory: java.lang.RuntimeException: unable to execute Action at org.drools.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionNodeInstance.java:56) at org.drools.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:111) at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:141) at org.drools.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:128) at org.drools.workflow.instance.node.StartNodeInstance.triggerCompleted(StartNodeInstance.java:49) at org.drools.workflow.instance.node.StartNodeInstance.internalTrigger(StartNodeInstance.java:41) at org.drools.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:111) at org.drools.ruleflow.instance.RuleFlowProcessInstance.internalStart(RuleFlowProcessInstance.java:16) at org.drools.process.instance.impl.ProcessInstanceImpl.start(ProcessInstanceImpl.java:185) at org.drools.workflow.instance.impl.WorkflowProcessInstanceImpl.start(WorkflowProcessInstanceImpl.java:230) at org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1639) at org.drools.impl.StatefulKnowledgeSessionImpl.startProcess(StatefulKnowledgeSessionImpl.java:272) at com.sample.ProcessTest.main(ProcessTest.java:42) Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String at com.sample.Process_com_sample_0Action0Invoker.execute(Process_com_sample_0Action0Invoker.java:18) at org.drools.workflow.instance.node.ActionNodeInstance.internalTrigger(ActionNodeInstance.java:54) ... 12 more In this scenario, my doubts are: - It's necessary any configuration for the access in action/split nodes to process variables? - How can I do that? Thanks in advance. -- Renato Herebia
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