Expressions, variables and processId

As we transition to the new Hyland Community, some post links may be temporarily disrupted as we finalize redirects. We apologize for the inconvenience and are working to resolve this as quickly as possible. Details.

imamchishty

I have a spring bean which requires several variables, lets imagine the service method is as follows:

void doSomething(String song, String id);‍

The task is defined as below:

<serviceTask id="task1" name="songTask" activiti:expression="#{bean.doSomething(song, id)}>
<extensionElements>
<activiti:field name="song" stringValue="november rain" />
</extensionElements>
</serviceTask>‍‍‍‍‍

Questions:
1. When the task is fired song is not found, even though its been defined in the extension elements. I would've expected the song property to have been added to the variables map within the process instance.

2. The second param required is the actual process instance Id. I know that this can be obtained from the delegate expression, but I don't wish to make my beans have a dependency on activiti. How can the id passed in?

Thanks

trademak

Hi,

1. That's right, you can only use process variables here that are already available in the process context. In your example song isn't available in the process context.
2. What you could do is use execution.processInstanceId as input parameter I think.

Best regards,