Error when building process with DMN tables

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mp4...@att.com

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Nov 27, 2015, 10:03:15 AM11/27/15

to camunda BPM users

Through the kind assistance of Rob, Bernd, and Sebastian, I have gotten nearly to end of my first DMN process attempt. However, I am experiencing a problem and I can't figure it out.

The following code seems to be the source of the issue, but I can't be sure. I could find no real example of the usage of the "getSingleResult" although in this case, getSingleEntry should work.

All I want to do is pass the decision result from a business rule task to a later exclusive gateway so I can take the correct route through the process. It's not clear how one "exposes" the results of the DMN table. The "getXXX" function seems to be the easiest way to extract the values from the DMN results, but I'm obviously not using it correctly.

The format of the sequence flow Condition is similar that used in the Insurance Application process. I traced the variable "riskAssessment" back through the code and I'm assuming that the output column labeled "riskAssessment" is the source of the value. However, this process uses an execution listener to process the results.

This is probably something stupid that I'm not doing, but then again, I don't seem to be that bright these days.

BUSINESS RULE TASK DEFINITION:

<bpmn2:businessRuleTask id="BusinessRuleTask_hostConnectMethod" camunda:resultVariable="getHostConnectMethodResult" camunda:decisionRef="hostConnectMethod" name="Get Host Connect Method">
<bpmn2:extensionElements>
<camunda:inputOutput>
<camunda:outputParameter name="targetConnectMethod"><![CDATA[
${decisionResult.getSingleResult().getEntry("targetConnectMethod")}
]]></camunda:outputParameter>
</camunda:inputOutput>
</bpmn2:extensionElements>
<bpmn2:incoming>SequenceFlow_18</bpmn2:incoming>
<bpmn2:outgoing>SequenceFlow_19</bpmn2:outgoing>
</bpmn2:businessRuleTask>

The "targetConnectMethod" is the only output column of DMN table "hostConnectMethod" with Hit Policy "UNIQUE". The table should return one and only one row.

The process reaches an exclusive gateway with two sequence flows. The route the process takes is determined by the value of "targetConnectMethod", which should now be available in the global process. The flow in question is defined in the following code.

SEQUENCE FLOW DEFINITION:

<bpmn2:sequenceFlow id="SequenceFlow_ConnectSsh" name="SSH" sourceRef="ExclusiveGateway_ConnectionMethod" targetRef="ServiceTask_SshExecuteCommand">
<bpmn2:conditionExpression xsi:type="bpmn2:tFormalExpression">#{targetConnectMethod == 'ssh'}</bpmn2:conditionExpression>
</bpmn2:sequenceFlow>

When I execute the build, the tests throw the following errors (the second being a another instance of the same issue):

BUILD ERRORS:

shouldUseClearPrivateKey(com.att.camunda.CamundaHostExecuteCommandTest): DMN-01002 Unable to evaluate expression for language 'juel': '${ssh}'
shouldShowError(com.att.camunda.CamundaHostExecuteCommandTest): DMN-01002 Unable to evaluate expression for language 'juel': '${ssh}'

STACK TRACE:

-------------------------------------------------------------------------------
Test set: com.att.camunda.CamundaHostExecuteCommandTest
-------------------------------------------------------------------------------
Tests run: 2, Failures: 0, Errors: 2, Skipped: 0, Time elapsed: 3.256 sec <<< FAILURE!
shouldUseClearPrivateKey(com.att.camunda.CamundaHostExecuteCommandTest) Time elapsed: 3.133 sec <<< ERROR!
org.camunda.bpm.dmn.engine.impl.DmnEvaluationException: DMN-01002 Unable to evaluate expression for language 'juel': '${ssh}'
at org.camunda.bpm.dmn.engine.impl.DmnEngineLogger.unableToEvaluateExpression(DmnEngineLogger.java:32)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateElExpression(DefaultDmnDecisionContext.java:329)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateExpression(DefaultDmnDecisionContext.java:297)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateOutputEntry(DefaultDmnDecisionContext.java:269)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateOutputEntries(DefaultDmnDecisionContext.java:245)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateMatchingRule(DefaultDmnDecisionContext.java:164)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.setEvaluationOutput(DefaultDmnDecisionContext.java:156)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateDecisionTable(DefaultDmnDecisionContext.java:103)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnEngine.evaluateDecisionTable(DefaultDmnEngine.java:95)
at org.camunda.bpm.engine.impl.dmn.invocation.DecisionTableInvocation.invoke(DecisionTableInvocation.java:52)
at org.camunda.bpm.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:54)
at org.camunda.bpm.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocationInContext(DefaultDelegateInterceptor.java:86)
at org.camunda.bpm.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:58)
at org.camunda.bpm.engine.impl.util.DecisionTableUtil.invoke(DecisionTableUtil.java:86)
at org.camunda.bpm.engine.impl.util.DecisionTableUtil.evaluateDecisionTable(DecisionTableUtil.java:66)
at org.camunda.bpm.engine.impl.bpmn.behavior.DmnBusinessRuleTaskActivityBehavior$1.call(DmnBusinessRuleTaskActivityBehavior.java:53)
at org.camunda.bpm.engine.impl.bpmn.behavior.DmnBusinessRuleTaskActivityBehavior$1.call(DmnBusinessRuleTaskActivityBehavior.java:50)
at org.camunda.bpm.engine.impl.bpmn.behavior.AbstractBpmnActivityBehavior.executeWithErrorPropagation(AbstractBpmnActivityBehavior.java:105)
at org.camunda.bpm.engine.impl.bpmn.behavior.DmnBusinessRuleTaskActivityBehavior.execute(DmnBusinessRuleTaskActivityBehavior.java:50)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationActivityExecute.execute(PvmAtomicOperationActivityExecute.java:41)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationActivityExecute.execute(PvmAtomicOperationActivityExecute.java:26)
at org.camunda.bpm.engine.impl.interceptor.AtomicOperationInvocation.execute(AtomicOperationInvocation.java:81)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.invokeNext(CommandContext.java:180)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performNext(CommandContext.java:159)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:134)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:494)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:471)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(PvmAtomicOperationTransitionNotifyListenerStart.java:56)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(PvmAtomicOperationTransitionNotifyListenerStart.java:26)
at org.camunda.bpm.engine.impl.core.operation.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:65)
at org.camunda.bpm.engine.impl.interceptor.AtomicOperationInvocation.execute(AtomicOperationInvocation.java:81)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.invokeNext(CommandContext.java:180)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performNext(CommandContext.java:159)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:134)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:124)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:505)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:480)
at org.camunda.bpm.engine.impl.core.operation.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:58)
at org.camunda.bpm.engine.impl.interceptor.AtomicOperationInvocation.execute(AtomicOperationInvocation.java:81)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.invokeNext(CommandContext.java:180)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performNext(CommandContext.java:159)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:134)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:124)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:505)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:480)
at org.camunda.bpm.engine.impl.core.operation.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:58)
at org.camunda.bpm.engine.impl.interceptor.AtomicOperationInvocation.execute(AtomicOperationInvocation.java:81)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.invokeNext(CommandContext.java:180)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performNext(CommandContext.java:159)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:134)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:494)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:471)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationTransitionCreateScope.scopeCreated(PvmAtomicOperationTransitionCreateScope.java:34)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationCreateScope.execute(PvmAtomicOperationCreateScope.java:49)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationCreateScope.execute(PvmAtomicOperationCreateScope.java:23)
at org.camunda.bpm.engine.impl.interceptor.AtomicOperationInvocation.execute(AtomicOperationInvocation.java:81)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.invokeNext(CommandContext.java:180)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performNext(CommandContext.java:167)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:134)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:494)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:471)
at org.camunda.bpm.engine.impl.pvm.runtime.PvmExecutionImpl.start(PvmExecutionImpl.java:229)
at org.camunda.bpm.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:75)
at org.camunda.bpm.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:35)
at org.camunda.bpm.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24)
at org.camunda.bpm.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:95)
at org.camunda.bpm.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:30)
at org.camunda.bpm.engine.impl.RuntimeServiceImpl.startProcessInstanceByKey(RuntimeServiceImpl.java:78)
at com.att.camunda.CamundaHostExecuteCommandTest.shouldUseClearPrivateKey(CamundaHostExecuteCommandTest.java:150)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:53)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:123)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:104)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:164)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:110)
at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:175)
at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcessWhenForked(SurefireStarter.java:107)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:68)
Caused by: org.camunda.bpm.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'ssh'
at org.camunda.bpm.engine.impl.juel.AstIdentifier.eval(AstIdentifier.java:83)
at org.camunda.bpm.engine.impl.juel.AstEval.eval(AstEval.java:50)
at org.camunda.bpm.engine.impl.juel.AstNode.getValue(AstNode.java:26)
at org.camunda.bpm.engine.impl.juel.TreeValueExpression.getValue(TreeValueExpression.java:114)
at org.camunda.bpm.engine.impl.dmn.el.ProcessEngineElExpression.getValue(ProcessEngineElExpression.java:43)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateElExpression(DefaultDmnDecisionContext.java:325)
... 98 more
shouldShowError(com.att.camunda.CamundaHostExecuteCommandTest) Time elapsed: 0.093 sec <<< ERROR!
org.camunda.bpm.dmn.engine.impl.DmnEvaluationException: DMN-01002 Unable to evaluate expression for language 'juel': '${ssh}'
at org.camunda.bpm.dmn.engine.impl.DmnEngineLogger.unableToEvaluateExpression(DmnEngineLogger.java:32)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateElExpression(DefaultDmnDecisionContext.java:329)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateExpression(DefaultDmnDecisionContext.java:297)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateOutputEntry(DefaultDmnDecisionContext.java:269)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateOutputEntries(DefaultDmnDecisionContext.java:245)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateMatchingRule(DefaultDmnDecisionContext.java:164)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.setEvaluationOutput(DefaultDmnDecisionContext.java:156)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateDecisionTable(DefaultDmnDecisionContext.java:103)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnEngine.evaluateDecisionTable(DefaultDmnEngine.java:95)
at org.camunda.bpm.engine.impl.dmn.invocation.DecisionTableInvocation.invoke(DecisionTableInvocation.java:52)
at org.camunda.bpm.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:54)
at org.camunda.bpm.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocationInContext(DefaultDelegateInterceptor.java:86)
at org.camunda.bpm.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:58)
at org.camunda.bpm.engine.impl.util.DecisionTableUtil.invoke(DecisionTableUtil.java:86)
at org.camunda.bpm.engine.impl.util.DecisionTableUtil.evaluateDecisionTable(DecisionTableUtil.java:66)
at org.camunda.bpm.engine.impl.bpmn.behavior.DmnBusinessRuleTaskActivityBehavior$1.call(DmnBusinessRuleTaskActivityBehavior.java:53)
at org.camunda.bpm.engine.impl.bpmn.behavior.DmnBusinessRuleTaskActivityBehavior$1.call(DmnBusinessRuleTaskActivityBehavior.java:50)
at org.camunda.bpm.engine.impl.bpmn.behavior.AbstractBpmnActivityBehavior.executeWithErrorPropagation(AbstractBpmnActivityBehavior.java:105)
at org.camunda.bpm.engine.impl.bpmn.behavior.DmnBusinessRuleTaskActivityBehavior.execute(DmnBusinessRuleTaskActivityBehavior.java:50)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationActivityExecute.execute(PvmAtomicOperationActivityExecute.java:41)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationActivityExecute.execute(PvmAtomicOperationActivityExecute.java:26)
at org.camunda.bpm.engine.impl.interceptor.AtomicOperationInvocation.execute(AtomicOperationInvocation.java:81)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.invokeNext(CommandContext.java:180)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performNext(CommandContext.java:159)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:134)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:494)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:471)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(PvmAtomicOperationTransitionNotifyListenerStart.java:56)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(PvmAtomicOperationTransitionNotifyListenerStart.java:26)
at org.camunda.bpm.engine.impl.core.operation.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:65)
at org.camunda.bpm.engine.impl.interceptor.AtomicOperationInvocation.execute(AtomicOperationInvocation.java:81)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.invokeNext(CommandContext.java:180)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performNext(CommandContext.java:159)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:134)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:124)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:505)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:480)
at org.camunda.bpm.engine.impl.core.operation.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:58)
at org.camunda.bpm.engine.impl.interceptor.AtomicOperationInvocation.execute(AtomicOperationInvocation.java:81)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.invokeNext(CommandContext.java:180)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performNext(CommandContext.java:159)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:134)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:124)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:505)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:480)
at org.camunda.bpm.engine.impl.core.operation.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:58)
at org.camunda.bpm.engine.impl.interceptor.AtomicOperationInvocation.execute(AtomicOperationInvocation.java:81)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.invokeNext(CommandContext.java:180)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performNext(CommandContext.java:159)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:134)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:494)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:471)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationTransitionCreateScope.scopeCreated(PvmAtomicOperationTransitionCreateScope.java:34)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationCreateScope.execute(PvmAtomicOperationCreateScope.java:49)
at org.camunda.bpm.engine.impl.pvm.runtime.operation.PvmAtomicOperationCreateScope.execute(PvmAtomicOperationCreateScope.java:23)
at org.camunda.bpm.engine.impl.interceptor.AtomicOperationInvocation.execute(AtomicOperationInvocation.java:81)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.invokeNext(CommandContext.java:180)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performNext(CommandContext.java:167)
at org.camunda.bpm.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:134)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:494)
at org.camunda.bpm.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:471)
at org.camunda.bpm.engine.impl.pvm.runtime.PvmExecutionImpl.start(PvmExecutionImpl.java:229)
at org.camunda.bpm.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:75)
at org.camunda.bpm.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:35)
at org.camunda.bpm.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24)
at org.camunda.bpm.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:95)
at org.camunda.bpm.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:30)
at org.camunda.bpm.engine.impl.RuntimeServiceImpl.startProcessInstanceByKey(RuntimeServiceImpl.java:78)
at com.att.camunda.CamundaHostExecuteCommandTest.shouldShowError(CamundaHostExecuteCommandTest.java:180)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:53)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:123)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:104)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:164)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:110)
at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:175)
at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcessWhenForked(SurefireStarter.java:107)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:68)
Caused by: org.camunda.bpm.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'ssh'
at org.camunda.bpm.engine.impl.juel.AstIdentifier.eval(AstIdentifier.java:83)
at org.camunda.bpm.engine.impl.juel.AstEval.eval(AstEval.java:50)
at org.camunda.bpm.engine.impl.juel.AstNode.getValue(AstNode.java:26)
at org.camunda.bpm.engine.impl.juel.TreeValueExpression.getValue(TreeValueExpression.java:114)
at org.camunda.bpm.engine.impl.dmn.el.ProcessEngineElExpression.getValue(ProcessEngineElExpression.java:43)
at org.camunda.bpm.dmn.engine.impl.DefaultDmnDecisionContext.evaluateElExpression(DefaultDmnDecisionContext.java:325)
... 98 more

Ingo Richtsmeier

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Nov 27, 2015, 10:46:41 AM11/27/15

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Hi,

I struggled at the same point recently and the camunda:decisionResultMapping="singleEntry" made it for me.

Assuming a rule with output "ssh" (in double quotes) you can map it in the business rules task into a camunda:resultVariable="hostConnectMethod" with the mapping above. You don't need any input-output-mapping any more.

The condition on the sequence flow is now ${hostConnectMethod == 'ssh'}

That should be enough.

Attached you can find the process, the table and a JUnit test from our archetype, testing the happy path.

More info on predefined decision result mapping is here: https://docs.camunda.org/manual/latest/user-guide/process-engine/decisions/bpmn-cmmn/#predefined-mapping-of-the-decision-result

Does this helps you?

Kind regards, Ingo

process.bpmn

process.png

table.dmn

InMemoryH2Test.java

Sebastian Menski

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Nov 27, 2015, 10:49:52 AM11/27/15

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Hi Michael,

the exception is from the DMN engine. So the error is unrelated to the BPMN process. What the exception says it tries to evaluate an expession with the content ssh.

I would guess that you have in one of your DMN tables an output entry with the content ssh but without double quotes. So the DMN engine doesn't know that it is a string and tries

to find the variable ssh.

Cheers,

Sebastian

mp4...@att.com

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Nov 27, 2015, 11:40:06 AM11/27/15

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I'm making progress. Ingo's suggestion worked and Sebastian was correct about the quotes. I was able to get a successful build, although a test failed and I'll try to figure that out on my own.

I would suggest that your documentation include a number of graphical elements showing how a value(s) or column(s) in a DMN table are exposed to the process. I would include examples for each method of extracting and using these various elements.

I realize that documentation is the last thing that developers like to do, so I'll offer to help if I can. My German is 30 years old, but I suppose I could review documentation. I'm not sure how you create your documents, so I can't say what more I can offer.

Thank you for all the help.

Sebastian Menski

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Nov 27, 2015, 12:05:01 PM11/27/15

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Hi Michael,

great to hear that it finally works now. And thanks for the offer to help. We are currently finishing the first version

of the DMN documentation and you are always welcome to send pull requests with improvements.

You can always find the latest (work in progress) documentation at:

http://stage.docs.camunda.org/manual/develop/

And if you want to improve something just create a pull request on GitHub:
https://github.com/camunda/camunda-docs-manual