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The Java Developers Almanac 1.4Order this book from Amazon. |
e192. Throwing an Exception from a Remote Method1. Define the remote interface.import java.rmi.*; public interface RObject extends Remote { void aMethod() throws RemoteException; }2. Define the remote object implementation. import java.rmi.*; import java.rmi.server.UnicastRemoteObject; public class RObjectImpl extends UnicastRemoteObject implements RObject { public RObjectImpl() throws RemoteException { super(); } public void aMethod() throws RemoteException { // The actual exception must be wrapped in a RemoteException throw new RemoteException("message", new FileNotFoundException("message")); } }3. Compile the remote object implementation. > javac RObject.java RObjectImpl.java4. Generate the skeletons and stubs. > rmic RObjectImpl5. Create an instance of the remote object and bind it to the RMI registry. try { RObject robj = new RObjectImpl(); Naming.rebind("//localhost/RObjectServer", robj); } catch (MalformedURLException e) { } catch (UnknownHostException e) { } catch (RemoteException e) { }6. Look up the remote object, invoke the method, and catch the exception. try { // Look up the remote object. RObject robj = (RObject) Naming.lookup("//localhost/RObjectServer"); // Invoke the method. robj.aMethod(); } catch (MalformedURLException e) { } catch (UnknownHostException e) { } catch (NotBoundException e) { } catch (RemoteException e) { // Get the actual exception that was thrown. Throwable realException = e.detail; }
e188. Defining and Exporting a Remote Object e189. Looking Up a Remote Object and Invoking a Method e190. Passing Parameters to a Remote Method e191. Returning Values from a Remote Method © 2002 Addison-Wesley. |