3.6. Observing a BPEL Process

Change the Empty element between elements receiveInput and replyOutput to Assign.

Add an Assign element between the receiveInput element and replyOutput element.

Click the Assign element in the BPEL editor to see the properties information in the Properties view.

Set its name in the Description tab as assignHelloMesg.

In the Details section of Properties view, click the New button to add a copy sub-element to the element. Assign "Variable to Variable" (input:string to result:string). An " initializer" popup dialog will appear. Click on the Yes button.

Navigate down to the desired component and click it. The icon to the left of the component name indicates its type: a blue dot is the BPEL variable, an envelope is a message, an "e" is an XML element. Click the New button once more and select Expression to Variable (assign concat($input.payload/tns:input, ' World')) to result:string.