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<TITLE>Defining and Exporting a Portable Remote Object (Java Developers Almanac Example)
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    <B><A HREF="../javax.rmi/pkg.html">javax.rmi</A></B><font color="#666666" class="xsmall-font">
        &nbsp;[3 examples]
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  <h3>e504. Defining and Exporting a Portable Remote Object</h3>

1. Define the remote interface. 

<pre>    import java.rmi.*;
    
    public interface <font color="#0066ff"><i>RObject</i></font> extends Remote {
        void <font color="#0066ff"><i>aMethod</i></font>() throws RemoteException;
    }
</pre>
2. Define the portable remote object implementation.

<pre>    import java.rmi.*;
    import java.rmi.server.UnicastRemoteObject;
    
    public class <font color="#0066ff"><i>RObjectImpl</i></font> extends UnicastRemoteObject implements <font color="#0066ff"><i>RObject</i></font> {
        public <font color="#0066ff"><i>RObjectImpl</i></font>() throws RemoteException {
            super();
        }
        // All remote methods must throw RemoteException
        public void <font color="#0066ff"><i>aMethod</i></font>() throws RemoteException {
        }
    }
</pre>
3. Compile the remote object implementation.

<pre>    &gt; javac <font color="#0066ff"><i>RObject</i></font>.java <font color="#0066ff"><i>RObjectImpl</i></font>.java
</pre>
4. Generate the skeletons and stubs.

<pre>    
<font color="#0066ff"><i>Using RMI over IIOP</i></font>
    &gt; rmic -iiop <font color="#0066ff"><i>RObjectImpl</i></font>
    
    <font color="#0066ff"><i>Using RMI over JRMP</i></font>
    &gt; rmic <font color="#0066ff"><i>RObjectImpl</i></font>

</pre>
5. Create an instance of the remote object and bind it to a name service.

<pre>    import javax.naming.*;
    import java.rmi.RemoteException;
    
    
    // JRMP: name = <font color="#0066ff"><i>"rmi://localhost/RObjectServer"</i></font>;
    // IIOP: name = <font color="#0066ff"><i>"iiop://localhost/RObjectServer"</i></font>;
    try {
        <font color="#0066ff"><i>RObject</i></font> robj = new <font color="#0066ff"><i>RObjectImpl()</i></font>;
        new InitialContext().bind(name, robj);
    } catch (NamingException e) {
    } catch (RemoteException e) {
    }
</pre>
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            &nbsp;<b>Related Examples</b></font></td>
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e503. <a class="eglink" href="StartNameServer.html?l=rel">
    Starting the Name Server
</a>
<br>

e505. <a class="eglink" href="LookupRemote.html?l=rel">
    Looking Up a Portable Remote Object and Invoking a Method
</a>
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