I have a question regarding the implementation of mapping of variables from a jBPM process instance to ESB messages by the EsbActionHandler class. I have been trying to figure out a way to pass a static value from a jBPM process node to an ESB service using only the out-of-the-box ESB/BPM integration, and I noticed that the Mapping.parseMappingElement(Element mappingElement) method parses the value of a "default" attribute from the bpmToEsbVars/mapping element of the process definition. It stores that value in the mapping instance along with the MVEL expressions and scope: Mapping mapping = new Mapping(); | mapping.setEsb(mappingElement.attributeValue(Constants.ESB_VARNAME_TAG)); | mapping.setBpm(mappingElement.attributeValue(Constants.BPM_VARNAME_TAG)); | mapping.setDefaultValue(mappingElement.attributeValue(Constants.DEFAULT_VALUE_TAG)); | If the JbpmObjectMapper.getObjectFromVariableMap(...) returns a null for the mapping, an attempt is made to find the variable in the execution context. | Object object = getObjectFromJBpmVariableMap(isPrcScope, mapping.getBpm(), ctxInstance, token); | //if that fails then try to get it from the ExecutionContext | if (object==null) { | object = MVEL.getProperty(mapping.getBpm(), executionContext); | } | In my test code where the variable does not exist the following uncaught exceptrion is thrown by the MVEL.getProperty() call: | 15:15:16,343 ERROR [GraphElement] action threw exception: unable to resolve property: actionId | org.mvel.CompileException: unable to resolve property: actionId | at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:289) | at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:110) | at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.get(ReflectiveAccessorOptimizer.java:94) | at org.mvel.MVEL.getProperty(MVEL.java:572) | at org.jboss.soa.esb.services.jbpm.JBpmObjectMapper.setOnEsbMessage(JBpmObjectMapper.java:140) | at org.jboss.soa.esb.services.jbpm.JBpmObjectMapper.mapFromJBpmToEsbMessage(JBpmObjectMapper.java:81) | at org.jboss.soa.esb.services.jbpm.actionhandlers.EsbActionHandler.execute(EsbActionHandler.java:103) | at org.jbpm.graph.def.Action.execute(Action.java:126) | at sun.reflect.GeneratedMethodAccessor542.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) | at java.lang.reflect.Method.invoke(Unknown Source) | at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:197) | at org.jbpm.graph.def.Action_$$_javassist_98.execute(Action_$$_javassist_98.java) | at org.jbpm.graph.def.GraphElement.executeAction(GraphElement.java:284) | at org.jbpm.graph.def.Node.execute(Node.java:414) | at sun.reflect.GeneratedMethodAccessor528.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) | at java.lang.reflect.Method.invoke(Unknown Source) | at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:197) | at org.jbpm.graph.def.Node_$$_javassist_145.execute(Node_$$_javassist_145.java) | at org.jbpm.job.ExecuteNodeJob.execute(ExecuteNodeJob.java:28) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) | at java.lang.reflect.Method.invoke(Unknown Source) | at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:197) | at org.jbpm.job.Job_$$_javassist_149.execute(Job_$$_javassist_149.java) | at org.jbpm.job.executor.JobExecutorThread.executeJob(JobExecutorThread.java:170) | at org.jbpm.job.executor.JobExecutorThread.run(JobExecutorThread.java:60) | Caused by: org.mvel.PropertyAccessException: unable to resolve property: actionId | at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanProperty(ReflectiveAccessorOptimizer.java:383) | at org.mvel.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:258) | ... 28 more | Even if that didn't happen the default value from the mapping is never used. Should I log a JIRA ticket for either of these (I'm wondering if there is intent behind not using the default attribute)? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4267147#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...