Example
Step 1. Write the Java Server
a.) Remote interface (Hello\Greetings.java):
...
public interface Greetings extends Remote {
String hello( String name)
throws RemoteException;
}
b.) Implementation to the interface (Hello\GreetingsImpl.java):
...
public class GreetingsImpl extends PortableRemoteObject implements Greetings{
...
public String hello( String name ) throws RemoteException {
System.out.println("Greeting from" + name);
return "Greetings to " + name;
}
}
c.) The Java main (Server.java):
Create a instance of the remote object:
GreetingsImpl oGreetingsImpl = new GreetingsImpl();
Connect the name service:
Context initialNamingContext = new InitialContext();
Publish the reference with the name service. Use the 'HelloJavaServer' as
the name by which the object is published:
initialNamingContext.rebind("HelloJavaServer", oGreetingsImpl);
d.) Compile the Java project:
> mkdir classes
> javac -classpath . -d classes Server.java
> rmic -iiop -classpath .\classes -d classes Hello.GreetingsImpl
> cd classes
> jar cvf ..\Server.jar .
> cd ..
Step 2. Generate the IDL files
> mkdir idl
> MCjava2idl -cp Server.jar -v -p -d ..\IDL "Hello.Greetings"
Step 3. Generate .Net code form the IDL-File
> MCidl2cs -all -d ..\DotNetClient\Generated ..\IDL\Hello.idl
Step 4. Write the .Net Client
a.) Create a mobile application.
b.) Add a reference to 'MinCor\bin\MinCorCF.DLL' and
to 'MinCor\bin\JavaBuildinTypesCF.DLL'.
c.) Add the generated file: Generated\Hello.cs.
d.) The Client (ClientImpl.cs):
Define the connection parameter (server address & port) for the name service.
Note, that 'localhost' is just a pattern for later replacement with a passed in address string:
private static string[] m_strORBInit = {"-ORBInitRef NameService=corbaloc:iiop:1.2@localhost:1050/NameService"};
//...
m_strORBInit[0] = m_strORBInit[0].Replace("localhost", a_strIpAddr);
Initialize the CORBA ORB:
Middsol.CORBA.ORB oOrb = Middsol.CORBA._ORB.init( m_strORBInit, null );
Connect to the name service:
Middsol.CosNaming.NamingContextExt oNsCtx
= Middsol.CosNaming.NamingContextExtHelper.narrow( oOrb.resolve_initial_references("NameService"))
Use the name service to get an object reference to the remote object.
It is assumed that the remote object is known as 'HelloJavaServer' in the name service:
Hello.Greetings oGreetings = Hello.GreetingsHelper.narrow( oNsCtx.resolve_str("HelloJavaServer"));
Make a call to the remote object:
string strRet = oGreetings.hello( "Middsol" );
a_oFrmClt.writeLog(strRet);
e.) Implement a hosting frame (HelloClt.cs)
Step 5. Run the example
a.) Start the sun name service on port 1050:
> start orbd -ORBInitialPort 1050
b.) Start the java server by using JNDI CosNaming and
work with a name service running on 'localhost' at port '1050':
> start java -cp .;Server.jar -Djava.naming.factory.initial=com.sun.jndi.cosnaming.CNCtxFactory -Djava.naming.provider.url=iiop://localhost:1050 Server
c.) Copy the .Net Client to the target machine.
d.) Start the .Net Client.
