Examples of java.rmi.NoSuchObjectException

java.rmi.NoSuchObjectException
A NoSuchObjectException is thrown if an attempt is made to invoke a method on an object that no longer exists in the remote virtual machine. If a NoSuchObjectException occurs attempting to invoke a method on a remote object, the call may be retransmitted and still preserve RMI's "at most once" call semantics. A NoSuchObjectException is also thrown by the method java.rmi.server.RemoteObject.toStub and by the unexportObject methods of java.rmi.server.UnicastRemoteObject and java.rmi.activation.Activatable and @version 1.13, 11/17/05 @author Ann Wollrath @since JDK1.1 @see java.rmi.server.RemoteObject#toStub(Remote) @see java.rmi.server.UnicastRemoteObject#unexportObject(Remote,boolean) @see java.rmi.activation.Activatable#unexportObject(Remote,boolean)

            throw new NullPointerException("invalid argument");
        }


        if (StubAdapter.isStub(obj) ||
            obj instanceof java.rmi.server.RemoteStub) {
            throw new NoSuchObjectException(
                "Can only unexport a server object.");
        }


        Tie theTie = Util.getTie(obj);
        if (theTie != null) {
            Util.unexportObject(obj);
        } else {
            if (Utility.loadTie(obj) == null) {
                UnicastRemoteObject.unexportObject(obj,true);
            } else {
                throw new NoSuchObjectException("Object not exported.");
            }
        }
    }

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        // Now map to the correct RemoteException type...
        if (ex instanceof COMM_FAILURE) {
            return new MarshalException(message, ex);
        } else if (ex instanceof INV_OBJREF) {
            RemoteException newEx = new NoSuchObjectException(message);
            newEx.detail = ex;
            return newEx;
        } else if (ex instanceof NO_PERMISSION) {
            return new AccessException(message, ex);
        } else if (ex instanceof MARSHAL) {
            return new MarshalException(message, ex);
        } else if (ex instanceof OBJECT_NOT_EXIST) {
            RemoteException newEx = new NoSuchObjectException(message);
            newEx.detail = ex;
            return newEx;
        } else if (ex instanceof TRANSACTION_REQUIRED) {
            RemoteException newEx = new TransactionRequiredException(message);
            newEx.detail = ex;

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    /**
     * Deregisters a server object from the runtime.
     */
    public static void unexportObject(Remote obj) throws IOException {
        if (proxy == null)
            throw new NoSuchObjectException("Object not exported");
        proxy.unexportObject(obj);
    }

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    /**
     * Returns a stub for the given server object.
     */
    public static Remote toStub(Remote obj) throws IOException {
        if (proxy == null)
            throw new NoSuchObjectException("Object not exported");
        return proxy.toStub(obj);
    }

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    public synchronized Proxy getProxy(URI uri)
            throws NoSuchObjectException {


        Proxy proxy = (Proxy) _proxies.get(uri);
        if (proxy == null) {
            throw new NoSuchObjectException(
                    "Object not exported on URI=" + uri);
        }
        return proxy;
    }

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//         if (uri == null) {
//             throw new IllegalArgumentException("Argument 'uri' is null");
//         }
        ObjectRef ref = (ObjectRef) _objectMap.get(object);
        if (ref == null) {
            throw new NoSuchObjectException("Object not exported");
        }
        URI parsed = null;
        if (uri != null) {
            try {
                parsed = URIHelper.parse(uri);
            } catch (InvalidURIException exception) {
                throw new NoSuchObjectException(exception.getMessage());
            }
        }
        return ref.getProxy(parsed);
    }

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//         if (uri == null) {
//             throw new IllegalArgumentException("Argument 'uri' is null");
//         }
        ObjectRef ref = (ObjectRef) _objIDMap.get(objID);
        if (ref == null) {
            throw new NoSuchObjectException("Object not exported");
        }
        // ref.getProxy(uri);
        // ensures it has been exported on the specified uri
        return ref.getObject();
    }

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        ObjectRef ref = (ObjectRef) _objectMap.remove(object);
        if (ref != null) {
            _objIDMap.remove(ref.getObjID());
        } else {
            throw new NoSuchObjectException("Object not exported");
        }
    }

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                throw new SystemException("Unexpected load exception", e);
            }


            // Did we find the instance?
            if (instance == null) {
                throw new InvalidateReferenceException(new NoSuchObjectException("Not Found"));
            }


            // remember instance until it is returned to the cache
            checkedOutInstances.put(primaryKey, instance);
        }

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                    throw new SystemException("Unexpected load exception", e);
                }


                // Did we find the instance?
                if (instance == null) {
                    throw new InvalidateReferenceException(new NoSuchObjectException("Not Found"));
                }


                
                // remember instance until it is returned to the cache                
                checkedOutInstances.put(primaryKey, instance);

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