@Retention(value=RUNTIME)
 @Target(value=METHOD)
public @interface Oneway

Indicates that the given @WebMethod has only an input message and no output. Typically, a oneway method returns the thread of control to the calling application prior to executing the actual business method. A 181 processor should report an error if an operation marked @Oneway has a return value or Holder parameters, or declares any checked exceptions.