/**
* Override parent's behavior to return all interfaces
*
* @param impl The remote object to use, must not be null
* @return Array of classes that can be used for remote invocations. In this case, all interfaces
* {@link Class#getInterfaces()} are returned
* @throws ExportException
*/
@Override
protected Class[] getRemoteInterfaces(Remote impl) throws ExportException {
if (impl == null) {
throw new IllegalArgumentException("impl is null");
}
return (impl.getClass().getInterfaces());
}
@SuppressWarnings("UseOfSystemOutOrSystemErr")
protected static void start(Remote remote) throws Exception {
setupRMI();
banJNDI();
if (ourRemote != null) throw new AssertionError("Already started");
ourRemote = remote;
Registry registry;
int port;
for (Random random = new Random(); ; ) {
port = random.nextInt(0xffff);
if (port < 4000) continue;
try {
registry = LocateRegistry.createRegistry(port);
break;
} catch (ExportException ignored) {
}
}
try {
Remote stub = UnicastRemoteObject.exportObject(ourRemote, 0);
final String name = remote.getClass().getSimpleName() + Integer.toHexString(stub.hashCode());
registry.bind(name, stub);
String id = port + "/" + name;
System.out.println("Port/ID: " + id);
long waitTime = 2 * 60 * 1000L;
Object lock = new Object();
//noinspection InfiniteLoopStatement
while (true) {
//noinspection SynchronizationOnLocalVariableOrMethodParameter
synchronized (lock) {
lock.wait(waitTime);
}
RemoteDeadHand deadHand = (RemoteDeadHand) registry.lookup(RemoteDeadHand.BINDING_NAME);
waitTime = deadHand.ping(id);
}
} catch (Throwable e) {
e.printStackTrace(System.err);
System.exit(1);
}
}
public static void registryObject(String name, Remote remoteObj)
throws AccessException, RemoteException, AlreadyBoundException {
// Đăng ký đối tượng vào bộ đăng ký
// Nó được gắn với tên nào đó
// Client sẽ tìm kiếm trong bộ đăng ký với tên này để có thể gọi đối
// tượng
registry.bind(name, remoteObj);
System.out.println(
"Registered: " + name + " -> " + remoteObj.getClass().getName() + "[" + remoteObj + "]");
}
protected Object invoke(
Remote server, ObjectName name, String method, Object[] args, String[] sig) throws Exception {
// This should work, too, but I couldn't test it yet.
// ((org.jboss.jmx.adaptor.rmi.RMIAdaptor) server).
// invoke(name, method, args, sig);
Class<?>[] argTypes =
new Class[] {ObjectName.class, String.class, Object[].class, String[].class};
Method m = server.getClass().getMethod("invoke", argTypes);
return m.invoke(server, new Object[] {name, method, args, sig});
}
private static void checkStub(Remote stub, Class<? extends Remote> stubClass) {
// Check remote stub is from the expected class.
//
if (stub.getClass() != stubClass) {
if (!Proxy.isProxyClass(stub.getClass())) {
throw new SecurityException("Expecting a " + stubClass.getName() + " stub!");
} else {
InvocationHandler handler = Proxy.getInvocationHandler(stub);
if (handler.getClass() != RemoteObjectInvocationHandler.class) {
throw new SecurityException(
"Expecting a dynamic proxy instance with a "
+ RemoteObjectInvocationHandler.class.getName()
+ " invocation handler!");
} else {
stub = (Remote) handler;
}
}
}
// Check RemoteRef in stub is from the expected class
// "sun.rmi.server.UnicastRef2".
//
RemoteRef ref = ((RemoteObject) stub).getRef();
if (ref.getClass() != UnicastRef2.class) {
throw new SecurityException(
"Expecting a " + UnicastRef2.class.getName() + " remote reference in stub!");
}
// Check RMIClientSocketFactory in stub is from the expected class
// "javax.rmi.ssl.SslRMIClientSocketFactory".
//
LiveRef liveRef = ((UnicastRef2) ref).getLiveRef();
RMIClientSocketFactory csf = liveRef.getClientSocketFactory();
if (csf == null || csf.getClass() != SslRMIClientSocketFactory.class) {
throw new SecurityException(
"Expecting a "
+ SslRMIClientSocketFactory.class.getName()
+ " RMI client socket factory in stub!");
}
}
/**
* Registers an activation descriptor (with the specified location, data, and restart mode) for
* the specified object, and exports that object with the specified port, and the specified client
* and server socket factories.
*
* <p><strong>Note:</strong> Using this method (as well as the <code>Activatable</code>
* constructors that both register and export an activatable remote object) is strongly
* discouraged because the actions of registering and exporting the remote object are <i>not</i>
* guaranteed to be atomic. Instead, an application should register an activation descriptor and
* export a remote object separately, so that exceptions can be handled properly.
*
* <p>This method first registers an activation descriptor for the specified object as follows. It
* obtains the activation system by invoking the method {@link ActivationGroup#getSystem
* ActivationGroup.getSystem}. This method then obtains an {@link ActivationID} for the object by
* invoking the activation system's {@link ActivationSystem#registerObject registerObject} method
* with an {@link ActivationDesc} constructed with the specified object's class name, and the
* specified location, data, and restart mode. If an exception occurs obtaining the activation
* system or registering the activation descriptor, that exception is thrown to the caller.
*
* <p>Next, this method exports the object by invoking the {@link
* #exportObject(Remote,ActivationID,int,RMIClientSocketFactory,RMIServerSocketFactory)
* exportObject} method with the specified remote object, the activation identifier obtained from
* registration, the specified port, and the specified client and server socket factories. If an
* exception occurs exporting the object, this method attempts to unregister the activation
* identifier (obtained from registration) by invoking the activation system's {@link
* ActivationSystem#unregisterObject unregisterObject} method with the activation identifier. If
* an exception occurs unregistering the identifier, that exception is ignored, and the original
* exception that occurred exporting the object is thrown to the caller.
*
* <p>Finally, this method invokes the {@link ActivationGroup#activeObject activeObject} method on
* the activation group in this VM with the activation identifier and the specified remote object,
* and returns the activation identifier to the caller.
*
* @param obj the object being exported
* @param location the object's code location
* @param data the object's bootstrapping data
* @param restart if true, the object is restarted (reactivated) when either the activator is
* restarted or the object's activation group is restarted after an unexpected crash; if
* false, the object is only activated on demand. Specifying <code>restart</code> to be <code>
* true</code> does not force an initial immediate activation of a newly registered object;
* initial activation is lazy.
* @param port the port on which the object is exported (an anonymous port is used if port=0)
* @param csf the client-side socket factory for making calls to the remote object
* @param ssf the server-side socket factory for receiving remote calls
* @return the activation identifier obtained from registering the descriptor with the activation
* system
* @exception ActivationException if activation group is not active
* @exception RemoteException if object registration or export fails
* @exception UnsupportedOperationException if and only if activation is not supported by this
* implementation
* @since 1.2
*/
public static ActivationID exportObject(
Remote obj,
String location,
MarshalledObject<?> data,
boolean restart,
int port,
RMIClientSocketFactory csf,
RMIServerSocketFactory ssf)
throws ActivationException, RemoteException {
ActivationDesc desc = new ActivationDesc(obj.getClass().getName(), location, data, restart);
/*
* Register descriptor.
*/
ActivationSystem system = ActivationGroup.getSystem();
ActivationID id = system.registerObject(desc);
/*
* Export object.
*/
try {
exportObject(obj, id, port, csf, ssf);
} catch (RemoteException e) {
/*
* Attempt to unregister activation descriptor because export
* failed and register/export should be atomic (see 4323621).
*/
try {
system.unregisterObject(id);
} catch (Exception ex) {
}
/*
* Report original exception.
*/
throw e;
}
/*
* This call can't fail (it is a local call, and the only possible
* exception, thrown if the group is inactive, will not be thrown
* because the group is not inactive).
*/
ActivationGroup.currentGroup().activeObject(id, obj);
return id;
}
