The beforeOutput event occurs after data has been selected from the database and ready to be sent to client side

class CustomBehavior extends ConnectorBehavior{
    public void beforeOutput(ConnectorOutputWriter out, HttpServletRequest http_request, HttpServletResponse http_response) {
        //any custom code
component.event.attach(new CustomBehavior());

beforeOutput method receives output writer object and request , response objects Event can be used to mix some custom data in XML output.

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