Generic Web Integration Layer - Missing?

talbeno — Thu, 19 Jan 2012 19:00:57 GMT

We need to integrate the Activiti engine with our products. We went over the REST APIs and the custom java classes.We think that what could be a "clean" integration architecture is a way to inject into the process XML file / process definition generator, a reference to the following:1. From a proces

Re: Generic Web Integration Layer - Missing?

trademak — Fri, 20 Jan 2012 09:08:28 GMT

Hi,

You can already do this using the Camel or Mule integration modules.
But the difficult thing is always, how do you create the request messages and how do you process the response messages.
So creating a Java delegate class to create a request message and do the REST or WS call would still be a clean approach to my opinion.

Best regards,

Re: Generic Web Integration Layer - Missing?

vnama — Tue, 24 Jan 2012 19:19:23 GMT

As suggested I have looked into the Camel integration module. This is what I have done so far:

-Built the activiti-camel module to give me a .jar file
-Inserted this jar file as well as any dependencies into the /lib folder of the activiti-explorer app.
-Through the explorer app's UI, I uploaded a .zip file containing all the files in the src/test/resources folder of the activiti-camel module (example.activiti, example.bpmn20.xml, camel-activiti-context.xml, and logging.properties)

The explorer recognizes this as a process and is listed in the deployments page, but when I go to start the process, I get an exception.

Exception
com.vaadin.event.ListenerMethod$MethodException
Cause: org.activiti.engine.ActivitiException: Unknown property used in expression
 at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
 at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
 at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1193)
 at com.vaadin.ui.Button.fireClick(Button.java:539)
 at com.vaadin.ui.Button.changeVariables(Button.java:206)
 at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1299)
 at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1219)
 at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:735)
 at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:296)
 at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
 at java.lang.Thread.run(Thread.java:662)
Caused by: org.activiti.engine.ActivitiException: Unknown property used in expression
 at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:55)
 at org.activiti.engine.impl.bpmn.behavior.ServiceTaskDelegateExpressionActivityBehavior.execute(ServiceTaskDelegateExpressionActivityBehavior.java:53)
 at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:44)
 at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:495)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:490)
 at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerStart.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerStart.java:52)
 at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
 at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:495)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:490)
 at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:49)
 at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:495)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:490)
 at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionCreateScope.execute(AtomicOperationTransitionCreateScope.java:49)
 at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:495)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:490)
 at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerTake.execute(AtomicOperationTransitionNotifyListenerTake.java:65)
 at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:495)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:490)
 at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionDestroyScope.execute(AtomicOperationTransitionDestroyScope.java:115)
 at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:495)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:490)
 at org.activiti.engine.impl.pvm.runtime.AtomicOperationTransitionNotifyListenerEnd.eventNotificationsCompleted(AtomicOperationTransitionNotifyListenerEnd.java:36)
 at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
 at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:495)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:490)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.take(ExecutionEntity.java:330)
 at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performOutgoingBehavior(BpmnActivityBehavior.java:102)
 at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performDefaultOutgoingBehavior(BpmnActivityBehavior.java:51)
 at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.leave(FlowNodeActivityBehavior.java:44)
 at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.execute(FlowNodeActivityBehavior.java:36)
 at org.activiti.engine.impl.pvm.runtime.AtomicOperationActivityExecute.execute(AtomicOperationActivityExecute.java:44)
 at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:495)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:490)
 at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStartInitial.eventNotificationsCompleted(AtomicOperationProcessStartInitial.java:44)
 at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
 at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:495)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:490)
 at org.activiti.engine.impl.pvm.runtime.AtomicOperationProcessStart.eventNotificationsCompleted(AtomicOperationProcessStart.java:44)
 at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:56)
 at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:76)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:495)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:490)
 at org.activiti.engine.impl.persistence.entity.ExecutionEntity.start(ExecutionEntity.java:284)
 at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:72)
 at org.activiti.engine.impl.cmd.StartProcessInstanceCmd.execute(StartProcessInstanceCmd.java:31)
 at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24)
 at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:42)
 at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:42)
 at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:130)
 at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:40)
 at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33)
 at org.activiti.engine.impl.RuntimeServiceImpl.startProcessInstanceById(RuntimeServiceImpl.java:57)
 at org.activiti.explorer.ui.process.listener.StartProcessInstanceClickListener.buttonClick(StartProcessInstanceClickListener.java:71)
 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:597)
 at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:490)
 … 22 more
Caused by: org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'camel'
 at org.activiti.engine.impl.juel.AstIdentifier.eval(AstIdentifier.java:83)
 at org.activiti.engine.impl.juel.AstEval.eval(AstEval.java:50)
 at org.activiti.engine.impl.juel.AstNode.getValue(AstNode.java:26)
 at org.activiti.engine.impl.juel.TreeValueExpression.getValue(TreeValueExpression.java:114)
 at org.activiti.engine.impl.delegate.ExpressionGetInvocation.invoke(ExpressionGetInvocation.java:33)
 at org.activiti.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:37)
 at org.activiti.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:25)
 at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:50)
 … 88 more

I have also tried including the activiti-camel-5.9-SNAPSHOT.jar and all of its dependencies as part of the build path of the explorer, and then compiled the explorer, but the same errors occurs.

I have not made changes to any of the files. They are just the files included in the src/test/resources folder of the activiti-camel module. Hopefully I am not missing anything obvious. Any guidance would be appreciated.

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Generic Web Integration Layer - Missing?

Re: Generic Web Integration Layer - Missing?

Re: Generic Web Integration Layer - Missing?