topic Property in JUEL Expression in Alfresco Archive

Property in JUEL Expression

stroobat — Wed, 02 Mar 2011 10:30:13 GMT

I'm creating a subprocess that accepts some parameters. One of the first steps in my subprocess is to check the presense of the paremeters.If they are not present I'm ending the subprocess (the parent process will take over).Here is the xml: <process id="resubmitOrder"> <exclusi

Re: Property in JUEL Expression

jbarrez — Wed, 02 Mar 2011 13:45:45 GMT

Is it a embedded subprocess or a call activity?

For call activities special care is needed to pass variables: see section 'passing variables' in userguide http://activiti.org/userguide/index.html#bpmnCallActivity

Re: Property in JUEL Expression

stroobat — Thu, 03 Mar 2011 07:26:07 GMT

Yes, I understand, and I am able to pass variables.

But as a subprocess, I don't know who is calling me, and I expect certain parameters to be passed to me.
That's why I wanted to check if the calling process has passed all the parameter I'm expecting.

If for instance I'm expecting an orderId (in the subprocess) and I want to check for it like this:


        <sequenceFlow id="resubmitFlow_2" sourceRef="checkParameters" targetRef="endResubmitOrder">
            <conditionExpression xsi:type="tFormalExpression">${orderId==null or subOrderId==null}</conditionExpression>
        </sequenceFlow>

So suppose that the orderId was not passed by the calling process I want to take some action …
But if the orderId is not passed the above XML will throw an exception saying orderId was not found.

Tom.

Re: Property in JUEL Expression

ronald_van_kuij — Thu, 03 Mar 2011 08:14:14 GMT

But if the orderId is not passed the above XML will throw an exception saying orderId was not found.

It is hard to return anything else since 'null' can be a valid value as can ''. So throwing an error in EL is the only option. What you can do e.g. in this case isnot use it directly, but implement a java service task that checks them, catches the error and sets another property that can be used in the condition.