Because OmniBroker supports C++ as well as Java, the client and/or the server can be written in C++ instead of Java. For example, here is the client program that we have been using written in C++ instead of Java:

0294: #include <iostream.h>
0295: #include <stdlib.h>
0296: #include <OB/CORBA.h>
0297: #include <OB/CosNaming.h>
0298: #include <Count.h>
0299: int main(int argc, char* argv[], char*[]) {
0300:    try {
0301:       CORBA_ORB_var orb = CORBA_ORB_init(argc, argv);
0302:       CORBA_BOA_var boa = orb -> BOA_init(argc, argv);
0303:       CORBA_Object_var objRef = orb -> string_to_object(argv[1]);
0304:       CosNaming_NamingContext_var ncRef =
0305:             CosNaming_NamingContext::_narrow(objRef);
0306:       CosNaming_Name path;
0307:       path.length(1);
0308:       path[0].id = CORBA_string_dup("second Count");
0309:       path[0].kind = CORBA_string_dup("");
0310:       CountApp_Count_var stubCount = 
0311:             CountApp_Count::_narrow(ncRef -> resolve(path));
0312:       cout << "before loop" << endl;
0313:       while ( true ) {
0314:          char stdinLine[100];
0315:          cin >> stdinLine;
0316:          if ( stdinLine[0] == 'q' ) break;
0317:          if ( stdinLine[0] == 's' )
0318:             cout << stubCount -> getCount() << endl;
0319:          else {
0320:             int intVal = atoi(stdinLine);
0321:             stubCount -> setCount(intVal);
0322:          }
0323:       }
0324:       cout << "after loop" << endl;
0325:    } 
0326:    catch ( ... ) {
0327:       cout << "whoops" << endl;
0328:    }
0329: }

To support C++, OmniBroker comes with a program called idl that can be used to process the interface in the file Count.idl:

setenv PATH /usr/local/utils/OB/current/bin:$PATH
idl Count.idl

This will create the files Count_skel.h, Count_skel.cpp, Count.h and Count.cpp in the current directory. The client program can now be compiled using a C++ compiler, such as the GNU C++ compiler:

g++ -c --no-implicit-templates -fhandle-exceptions \
   -I. -I/usr/local/utils/OB/current/include CountClient.cpp
g++ -c --no-implicit-templates -fhandle-exceptions \
   -I. -I/usr/local/utils/OB/current/include Count.cpp

This will produce the files CountClient.o and Count.o. These can be linked to produce a binary in the file CountClient by the command:

g++ -o CountClient CountClient.o Count.o -L/usr/local/utils/OB/current/lib \
   -lOB -lCosNaming -lIDL -lsocket -lnsl

Finally, the C++ version of the client program can be run, e.g., by using the command:

CountClient `grep IOR ../../IDL/CountNSIOR/nameserv.ior`

The text of the above program is at http://www.dur.ac.uk/barry.cornelius/papers/OB/CountNSIORPP/.