A method is described that involves comprising, during runtime in an object-oriented environment, invoking, from an object, a first Web services endpoint method to process a first message by: invoking the first Web services endpoint method through a first interface according to an endpoint method invocation format, where, the first Web services endpoint method is implemented with a first component that is provided one or more services by a first container. The method also involves invoking, from the object, a second Web services endpoint method to process a second message by: invoking the second Web services endpoint method through a second interface according to the endpoint method invocation format. The second Web services endpoint method is implemented with a second component that is provided one or more services by a second container. The first and second containers have respective interfaces that are different.