How to update back to GeoServer/Oracle from OpenLayers

I have followed the example to setup a WFS Transaction successfully:

http://ift.tt/1ApZhLA

My environment is GeoServer 2.6.1/OpenLayers 2.12.1. I do get the 4 toolbar icons on the upper right hand corner. (draw, modify, delete, save). I used a layer that is connected to an oracle table in geoserver as the editable layer.

Now, when I click on the "save" button, it does not add a record to that table. Of course, I was not expecting it to because it does not even know what key value I want to put in (as customerid) when it creates a new record with feature data; nor does it know which record to update the geometry for it its an existing key value (customerid). The editable layer I created based on the above link is:

// Customers Editable VECTOR Layer
            var saveStrategy = new OpenLayers.Strategy.Save();

            customers = new OpenLayers.Layer.Vector("Customers", {
                strategies: [new OpenLayers.Strategy.BBOX(), saveStrategy],
                projection: new OpenLayers.Projection("EPSG:2236"),
                protocol: new OpenLayers.Protocol.WFS({
                    version: "1.1.0",
                    srsName: "EPSG:2236",
                    url: "http://pc74535:8085/geoserver/sf/wfs",
                    featurePrefix: "sf",
                    featureType: "customers",
                    geometryName: "GEOMETRY"
                })
            });

The oracle table itself has the following fields:

-customerId
-geometry
-date_updated

My question is, how do I perform inserts through openlayers/geoserver/all the way to the oracle table. (To included key value and geometry, etc) I would like the above example to actually save the geometry back to a specific record in the table. I am not sure how to proceed on this.