Tutorial 1. Part 14 - Adding invoke to a BPEL flow

Making BPEL logic

Go back to the composite editor by clicking on the tab on top of canvas that reads “composite.xml”. Alternatively you can use the window menu and select the right window from there.

Double click on the VehicleStatus icon and the BPEL process will open.

 

Adding invocation of the newly created DB adapter

Drag and drop invoke between the receiveInput and reply input

Draw a line from the invoke to the added db adapter. This opens a dialog

Name it: InvokeDB

Input parameter: InvokeVehicleStatus_InputVariable

Output parameter: InvokeVehicleStatus_OutputVariable

You create variable by pressing the green plus signs. The edit asks you to name the variables. The default names are rather long so I tend to shorten them.

Preparing parameters for the invocation

Next we need to prepare the call to the DB adapter. Add an assign operation by dragging and dropping it before the invocation. (not shown as snapshot here).

Double click on it to edit the values. On general change its name to AssignVehicleDBQueryParams

On copy rules open up on the left side the inputVariable until you see the attribute license_number. On the right open the InvokeVehicleStatus_InputVariable until you see the license attribute. Draw a line between them to create a connection and press Ok.

Now the assignment operation is completed

Assign results to reply value

Add assign statement by dragging and dropping it after the invoke operation.

Double click on the assignment. Change its name to “AssignReturnValue” and make a copy operation between the return value of the invocation (InvokeVehicleStatus_OutputVariable) and the status attribute OutputVariable . Note: you can also change names of operationsby cliking on the name in the BPEL flow editor. This allows direct editing the name.

 That's it