void sendSessionMessages() {
ClientSessionHandler handler = handlers.get(sessionRefId);
/*
* If a local handler exists, forward messages to local
* handler to send to client session; otherwise log
* error message.
*/
if (handler != null && handler.isConnected()) {
if (sendLoginResult) {
if (loginSuccess) {
handler.loginSuccess();
} else {
handler.loginFailure(loginException);
return;
}
}
SessionProtocol protocol = handler.getSessionProtocol();
if (protocol != null) {
for (SendEvent sendEvent : messages) {
try {
protocol.sessionMessage(ByteBuffer.wrap(sendEvent.message), sendEvent.delivery);
} catch (Exception e) {
logger.logThrow(Level.WARNING, e, "sessionMessage throws");
}
}
}
} else {
logger.log(Level.FINE, "Discarding messages for disconnected session:{0}", handler);
}
}
/** {@inheritDoc} */
public void doShutdown() {
if (protocolAcceptor != null) {
try {
protocolAcceptor.close();
} catch (IOException ignore) {
}
}
for (ClientSessionHandler handler : handlers.values()) {
handler.shutdown();
}
handlers.clear();
if (exporter != null) {
try {
exporter.unexport();
logger.log(Level.FINEST, "client session server unexported");
} catch (RuntimeException e) {
logger.logThrow(Level.FINEST, e, "unexport server throws");
// swallow exception
}
}
synchronized (flushContextsLock) {
flushContextsLock.notifyAll();
}
}
/** {@inheritDoc} */
public SessionProtocol getSessionProtocol(BigInteger sessionRefId) {
if (sessionRefId == null) {
throw new NullPointerException("null sessionRefId");
}
serviceStats.getSessionProtocolOp.report();
ClientSessionHandler handler = handlers.get(sessionRefId);
return handler != null ? handler.getSessionProtocol() : null;
}
/** {@inheritDoc} */
public void doShutdown() {
final IoFuture<?, ?> future = acceptFuture;
acceptFuture = null;
if (future != null) {
future.cancel(true);
}
if (acceptor != null) {
try {
acceptor.close();
} catch (IOException e) {
logger.logThrow(Level.FINEST, e, "closing acceptor throws");
// swallow exception
}
}
if (asyncChannelGroup != null) {
asyncChannelGroup.shutdown();
boolean groupShutdownCompleted = false;
try {
groupShutdownCompleted = asyncChannelGroup.awaitTermination(1, TimeUnit.SECONDS);
} catch (InterruptedException e) {
logger.logThrow(Level.FINEST, e, "shutdown acceptor interrupted");
Thread.currentThread().interrupt();
}
if (!groupShutdownCompleted) {
logger.log(Level.WARNING, "forcing async group shutdown");
try {
asyncChannelGroup.shutdownNow();
} catch (IOException e) {
logger.logThrow(Level.FINEST, e, "shutdown acceptor throws");
// swallow exception
}
}
}
logger.log(Level.FINEST, "acceptor shutdown");
if (exporter != null) {
try {
exporter.unexport();
logger.log(Level.FINEST, "client session server unexported");
} catch (RuntimeException e) {
logger.logThrow(Level.FINEST, e, "unexport server throws");
// swallow exception
}
}
for (ClientSessionHandler handler : handlers.values()) {
handler.shutdown();
}
handlers.clear();
flushContextsThread.interrupt();
}
void flush() {
sendMessages();
if (disconnect) {
ClientSessionHandler handler = handlers.get(sessionRefId);
/*
* If session is local, disconnect session; otherwise, log
* error message.
*/
if (handler != null) {
handler.handleDisconnect(false);
} else {
logger.log(
Level.FINE, "discarding request to disconnect unknown session:{0}", sessionRefId);
}
}
}
/** {@inheritDoc} */
public void sendProtocolMessageNonTransactional(
BigInteger sessionRefId, ByteBuffer message, Delivery delivery) {
ClientSessionHandler handler = handlers.get(sessionRefId);
/*
* If a local handler exists, forward message to local handler
* to send to client session.
*/
if (handler != null) {
byte[] bytes = new byte[message.remaining()];
message.get(bytes);
handler.sendProtocolMessage(bytes, delivery);
} else {
logger.log(Level.FINE, "Discarding messages for unknown session:{0}", sessionRefId);
return;
}
}
void sendMessages() {
ClientSessionHandler handler = handlers.get(sessionRefId);
/*
* If a local handler exists, forward messages to local
* handler to send to client session; otherwise log
* error message.
*/
if (handler != null && handler.isConnected()) {
if (loginAck != null) {
handler.sendLoginProtocolMessage(loginAck, Delivery.RELIABLE);
}
for (byte[] message : messages) {
handler.sendProtocolMessage(message, Delivery.RELIABLE);
}
} else {
logger.log(Level.FINE, "Discarding messages for disconnected session:{0}", handler);
}
}
/**
* Validates the {@code identity} of the user logging in and returns {@code true} if the login is
* allowed to proceed, and {@code false} if the login is denied.
*
* <p>A user with the specified {@code identity} is allowed to log in if one of the following
* conditions holds:
*
* <ul>
* <li>the {@code identity} is not currently logged in, or
* <li>the {@code identity} is logged in, and the {@code
* com.sun.sgs.impl.service.session.allow.new.login} property is set to {@code true}.
* </ul>
*
* In the latter case (new login allowed), the existing user session logged in with {@code
* identity} is forcibly disconnected.
*
* <p>If this method returns {@code true}, the {@link #removeUserLogin} method must be invoked
* when the user with the specified {@code identity} is disconnected.
*
* @param identity the user identity
* @param handler the client session handler
* @return {@code true} if the user is allowed to log in with the specified {@code identity},
* otherwise returns {@code false}
*/
boolean validateUserLogin(Identity identity, ClientSessionHandler handler) {
ClientSessionHandler previousHandler = loggedInIdentityMap.putIfAbsent(identity, handler);
if (previousHandler == null) {
// No user logged in with the same idenity; allow login.
return true;
} else if (!allowNewLogin) {
// Same user logged in; new login not allowed, so deny login.
return false;
} else if (!previousHandler.loginHandled()) {
// Same user logged in; can't preempt user in the
// process of logging in; deny login.
return false;
} else {
if (loggedInIdentityMap.replace(identity, previousHandler, handler)) {
// Disconnect current user; allow new login.
previousHandler.handleDisconnect(false, true);
return true;
} else {
// Another same user login beat this one; deny login.
return false;
}
}
}
