Building a Request

There are two ways to build a Request object. Both begin by calling the create_request method defined by the SOMDObject class. The IDL prototype for create_request is as follows:

ORBStatus create_request(
                in  Context            ctx,
                in  Identifier         operation,
                in  NVList             arg_list,
                inout NamedValue       result,
                out Request            request,
                in  Flags              req_flags );

The arg_list can be constructed using the procedures described above and is passed to the Request object in the create_request call. Alternatively, arg_list can be specified as NULL and repetitive calls to add_arg can be used to specify the argument list. The add_arg method, defined by the Request class, has the following IDL prototype:

ORBStatus add_arg(
                in  Identifier  name,
                in  TypeCode    arg_type,
                in  void*       value,
                in  long        len,
                in  Flags       arg_flags );