topic Re: How do I get the current ProcessInstance in SpringBean? in Alfresco Archive

How do I get the current ProcessInstance in SpringBean?

mgriffith — Fri, 08 Jul 2011 22:41:55 GMT

Hello all, I have a ServiceTask in my workflow that resolves to a Spring Managed bean. It looks like this:<serviceTask id="springTask1" name="BeanTest" activiti:expression="${taskBean.execute(contactName)}"></serviceTask>‍‍‍I am not starting the process via code, but the process is eithe

Re: How do I get the current ProcessInstance in SpringBean?

mgriffith — Sat, 09 Jul 2011 19:16:31 GMT

Looking at the spring examples that ship with activiti, I think all I need to do is implement JavaDelegate and change my ServiceTask from an expression (which was working) to a DelegateExpression in the model.

I did that, and implemented JavaDelegate. When I execute the workflow, I get an error


Wrapped Exception (with status template): Delegate expression ${taskBean} did not resolve to an implementation of interface org.activiti.engine.impl.pvm.delegate.ActivityBehavior nor interface org.activiti.engine.delegate.JavaDelegate

When the task is fired. I cannot see how this is any different from the example provided.

My project source is attached. My bean looks like this:


public class GetBeanTest implements JavaDelegate {

 private ContactService contactService;
 
 public GetBeanTest() {
  super();
 }
 
 public String getContactName(String contactName) throws Exception {
  String retVal= "unknown";
  if(contactService == null){
   System.out.println("Bean was null!");
  }else{
   System.out.println("Bean is valid!");
   List<Contact> contacts= contactService.getContacts();
   System.out.println("There are " + contacts.size() +" in the contact list.");
   for (Contact contact : contacts) {
    if(contact.getName().equalsIgnoreCase(contactName)){
     System.out.println("Found the contact! " + contactName );
     retVal= contact.getEmail();
    }
   }
  }
  return retVal;

 }
 
 public void setContactService(ContactService contactService) {
  this.contactService = contactService;
 }

 @Override
 public void execute(DelegateExecution execution) throws Exception {
  System.out.println("+++++++++++++ in execute ++++++++++++++++");
  System.out.println("Event Name: " + execution.getEventName());
  System.out.println("ID: " + execution.getId());
  System.out.println("Process Instance ID: " + execution.getProcessInstanceId());
  Set<String> varNames= execution.getVariableNames();
  for (String string : varNames) {
   System.out.println("Varible Named " + string + " exists");
   if(string.equalsIgnoreCase("contactName")){
    String contactName= (String) execution.getVariable(string);
    getContactName(contactName);
   }else{
    System.out.println("unable to find contact name.");
   }
  }
 }
}

Re: How do I get the current ProcessInstance in SpringBean?

mgriffith — Mon, 11 Jul 2011 12:29:40 GMT

Bump. Any suggestions?

Re: How do I get the current ProcessInstance in SpringBean?

jbarrez — Tue, 19 Jul 2011 07:59:52 GMT

So if I understand you correctly, you have a working JavaDelegate, and want the process instance, right?

If you are using Spring, you don't need to implement any class, you can just do myclass.someMethod(execution), which will pass the current execution, from which you can obtain the current process instance.

Re: How do I get the current ProcessInstance in SpringBean?

mgriffith — Tue, 19 Jul 2011 14:25:51 GMT

Thanks for the reply. I didn't realize I could just reference the execution in an expression.