topic Re: How to create the activiti expressions and listeners in Alfresco Archive

How to create the activiti expressions and listeners

valarmathi — Tue, 25 Sep 2012 09:07:49 GMT

Hi,How can i use the activiti expressions(java script expressions) and listeners.Please tell me the flow how can i do it?Thanks,Valarmathi P

Re: How to create the activiti expressions and listeners

jbarrez — Wed, 26 Sep 2012 07:37:36 GMT

See http://activiti.org/userguide/index.html#executionListeners

Replace the 'class' with expression if you only need expressions.

In Activiti 5.11 (not yet released), it will be possible to use script tasks, like


 <userTask id="usertask1" name="All your base are belong to us">
   <extensionElements>
    <activiti:taskListener event="create" class="org.activiti.engine.impl.bpmn.listener.ScriptTaskListener">
     <activiti:field name="script">
      <activiti:string>
                def bar = "BAR";  // local variable
                foo = "FOO"; // pushes variable to execution context
                bar // implicit return value
               </activiti:string>
     </activiti:field>
     <activiti:field name="language" stringValue="groovy" />
     <activiti:field name="resultVariable" stringValue="myVar" />
    </activiti:taskListener>
   </extensionElements>
  </userTask>

Re: How to create the activiti expressions and listeners

valarmathi — Wed, 26 Sep 2012 10:26:01 GMT

I used 5.10 ,what i have to do.I don't know how to use the expressions and listeners .Please help me if anybody knowa.

Thanks ,
Valarmathi P

Re: How to create the activiti expressions and listeners

jbarrez — Mon, 01 Oct 2012 11:34:06 GMT

Please check the docs I linked to:

eg



    <userTask id="firstTask" />
    <sequenceFlow sourceRef="firstTask" targetRef="secondTask">
    <extensionElements>
      <activiti:executionListener class="org.activiti.examples.bpmn.executionListener.ExampleExecutionListenerTwo" />
    </extensionElements>
    </sequenceFlow>

Re: How to create the activiti expressions and listeners

valarmathi — Wed, 03 Oct 2012 10:50:18 GMT

Hi,

I used three usertask executionListeners ,

I got the following error.

Exception

com.vaadin.event.ListenerMethod$MethodException
Cause: org.activiti.engine.ActivitiException: couldn't instantiate class org.activiti.examples.bpmn.executionlistener.ExampleExecutionListenerOne
at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:164)
at com.vaadin.ui.AbstractComponent.fireEvent(AbstractComponent.java:1193)
at com.vaadin.ui.Button.fireClick(Button.java:539)
at com.vaadin.ui.Button.changeVariables(Button.java:206)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1299)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1219)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:735)
at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:296)
at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
Caused by: org.activiti.engine.ActivitiException: couldn't instantiate class org.activiti.examples.bpmn.executionlistener.ExampleExecutionListenerOne
at org.activiti.engine.impl.util.ReflectUtil.instantiate(ReflectUtil.java:131)
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.instantiateDelegate(ClassDelegate.java:162)
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.getExecutionListenerInstance(ClassDelegate.java:76)
at org.activiti.engine.impl.bpmn.helper.ClassDelegate.notify(ClassDelegate.java:68)
at org.activiti.engine.impl.pvm.runtime.AbstractEventAtomicOperation.execute(AbstractEventAtomicOperation.java:42)
at org.activiti.engine.impl.interceptor.CommandContext.performOperation(CommandContext.java:80)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperationSync(ExecutionEntity.java:546)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.performOperation(ExecutionEntity.java:541)
at org.activiti.engine.impl.persistence.entity.ExecutionEntity.start(ExecutionEntity.java:335)
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:63)
at org.activiti.engine.impl.RuntimeServiceImpl.startProcessInstanceById(RuntimeServiceImpl.java:63)
at org.activiti.explorer.ui.process.listener.StartProcessInstanceClickListener.buttonClick(StartProcessInstanceClickListener.java:71)
at sun.reflect.GeneratedMethodAccessor99.invoke(Unknown Source)
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.ActivitiClassLoadingException: Class not found: org.activiti.examples.bpmn.executionlistener.ExampleExecutionListenerOne
at org.activiti.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:81)
at org.activiti.engine.impl.util.ReflectUtil.instantiate(ReflectUtil.java:128)
… 44 more
Caused by: java.lang.ClassNotFoundException: org.activiti.examples.bpmn.executionlistener.ExampleExecutionListenerOne
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.activiti.engine.impl.util.ReflectUtil.loadClass(ReflectUtil.java:62)
… 45 more

Thanks,

Valarmathi P

Re: How to create the activiti expressions and listeners

frederikherema1 — Wed, 03 Oct 2012 11:13:50 GMT

Make sure the classes you reference are in your class path of the activiti-explorer WAR…

Re: How to create the activiti expressions and listeners

valarmathi — Thu, 04 Oct 2012 06:40:06 GMT

I checked the class its there in my war file.but i'm getting the same error.
Please help me

Thanks,
Valarmathi P

Re: How to create the activiti expressions and listeners

frederikherema1 — Thu, 04 Oct 2012 07:45:54 GMT


Caused by: java.lang.ClassNotFoundException: org.activiti.examples.bpmn.executionlistener.ExampleExecutionListenerOne

I think you should double-check if the class is rather in WEB-INF/classes or in a jar-file in the lib-folder…

Re: How to create the activiti expressions and listeners

valarmathi — Thu, 04 Oct 2012 08:23:26 GMT

I created Activity project only,so the class should be there in .bar file only.I tested in jUnit its running ,but Activity explorer showing the error.

Thanks,
Valarmathi P

Re: How to create the activiti expressions and listeners

frederikherema1 — Thu, 04 Oct 2012 08:56:25 GMT

Userguide states:

Note that Java classes present in the business archive will not be added to the classpath. All custom classes used in process definitions in the business archive (for example Java service tasks or event listener implementations) should be present on the activiti-engine's classpath in order to run the processes.

The bar-file doesn't contain the java-classes. Another JAR-file is created, containing the classes. This should be on the class path

Re: How to create the activiti expressions and listeners

valarmathi — Thu, 04 Oct 2012 10:46:15 GMT

yes,another jar file is there on the class path,but can't upload the jar file in the Activity Explorer right.how can i do it?

Thanks,
Valarmathi P

Re: How to create the activiti expressions and listeners

frederikherema1 — Thu, 04 Oct 2012 11:28:28 GMT

Again, it's NOT POSSIBLE to upload jar's (or classes) to activiti explorer. You should place the classes on the class path of the container the app is running in.

Re: How to create the activiti expressions and listeners

valarmathi — Fri, 05 Oct 2012 04:48:21 GMT

I put the jar file inside of the application tomcat webapps folder ,is this ok .Is ok means,where can i get the jar file.

Thanks,
Valarmathi P

Re: How to create the activiti expressions and listeners

frederikherema1 — Fri, 05 Oct 2012 06:40:47 GMT

If you're using activiti Designer and an Activiti Project, the jar-file of the classes in your project will be created once you have requested "Generate deployments artifacts". There should be a jar-file alongside the .bar file. If not, there is possibly a compile-error.

If you're not using an Activiti project, bundle the jar-file as you would do with other java-rpject, using the mechanism of your choice (ANT, maven, export jar in eclipse, …)

Re: How to create the activiti expressions and listeners

valarmathi — Fri, 05 Oct 2012 10:35:32 GMT

I'm using Activiti project only,while using "Generate deployments artifacts" i got the .bar file and .jar file both .
Where can i put that jar file .I used to put activiti/apps/tomcat/webapps/xxx.jar file,then how can i get the jar from the activiti-explorer.

Thanks,
Valarmathi P

Re: How to create the activiti expressions and listeners

frederikherema1 — Fri, 05 Oct 2012 11:19:08 GMT

Please consult google for inquiries like this. We're here to answer activiti-specific questions.

Adding a jar-file in a webapp is not really activiti-specific and a trivial thing to do if you're a java-developer…

Re: How to create the activiti expressions and listeners

valarmathi — Mon, 08 Oct 2012 04:26:43 GMT

I'm a developer only,if i put webapps folder in normal web applications means i know what i can do.
My question is where i can get the file from Activity explorer,if i upload .bar or xml file means i got it from activity explorer with activity diagram,thats'y i'm asking the question.Don't mistake me,i'm a java developer only.

Thanks,
Valarmathi P

Re: How to create the activiti expressions and listeners

frederikherema1 — Tue, 09 Oct 2012 07:29:40 GMT

I really don't get the question. Are you trying to retrieve the JAR-file from the explorer-app to use elsewhere?

Re: How to create the activiti expressions and listeners

valarmathi — Wed, 10 Oct 2012 05:17:52 GMT

Obviously yes.If i upload the jar file from the class path how i will take the uploaded file activity diagram from the activity explorer.

Thanks
Valarmathi P

Re: How to create the activiti expressions and listeners

frederikherema1 — Wed, 10 Oct 2012 07:19:21 GMT

You can't retrieve the JAR-file (containing the classes) from the activiti-explorer app. You can only view the deployments and their contents (.bar file) from the explorer APP or using the REST/Java API.