Writing the interface

The SEI is a standard Java interface. It defines a set of methods that a class will implement. It can also define a number of member fields and constants to which the implementing class has access.

In the case of an SEI the methods defined are intended to be mapped to operations exposed by a service. The SEI corresponds to a wsdl:portType element. The methods defined by the SEI correspond to wsdl:operation elements in the wsdl:portType element.

The below shows a simple SEI for a stock updating service.

Simple SEI

package org.apache.cxf;

public interface QuoteReporter {
   public Quote getQuote(String ticker);
}