class NetworkSession implements Runnable {
private final Logger log = LoggerFactory.getLogger(LogName.forObject(this));
private final NetworkManager manager;
private final String host;
private final int port;
private final EventSupport eventSupport;
private final ByteBuffer readBuffer = ByteBuffer.allocateDirect(NetworkManager.BUFFER_SIZE);
private final StringBuilder sb = new StringBuilder();
private SocketChannel channel;
NetworkSession(NetworkManager manager, String host, int port, EventSupport eventSupport) {
this.manager = manager;
this.host = host;
this.port = port;
this.eventSupport = eventSupport;
}
@Override
public void run() {
log.debug("network thread started");
try {
// run once
InetSocketAddress address = new InetSocketAddress(host, port);
channel = SocketChannel.open(address);
channel.configureBlocking(true);
reportChannel();
// main loop
while (!Thread.currentThread().isInterrupted()) {
int bytesRead = channel.read(readBuffer);
if (bytesRead == -1) break;
// TODO these StringBuilder shenanigans are fake
// actually put chars in a CharBuffer and write to parser
// parser returns list of events to be dispatched
readBuffer.flip();
while (readBuffer.hasRemaining()) {
sb.append((char) (readBuffer.get() & 0xFF));
}
dispatchEvent(EventType.TEXT_RECEIVED, null, sb.toString());
sb.setLength(0);
readBuffer.clear();
}
} catch (ClosedByInterruptException e) {
// normal result of being interrupted
} catch (Throwable t) {
log.error("network error", t);
dispatchEvent(EventType.NETWORK_ERROR, null, t);
} finally {
if (channel != null && channel.isOpen()) {
try {
channel.close();
} catch (IOException e) {
// ignore
}
}
reportStatus(NetworkState.DISCONNECTED);
log.debug("network thread exiting");
}
}
/**
* Posts state changes to the manager in the UI thread.
*
* @param status the new state
*/
private void reportStatus(final NetworkState status) {
SwingUtilities.invokeLater(
new Runnable() {
@Override
public void run() {
manager.setStatus(status);
}
});
}
/** Posts the channel identity to the manager in the UI thread. */
private void reportChannel() {
SwingUtilities.invokeLater(
new Runnable() {
@Override
public void run() {
manager.setChannel(channel);
manager.setStatus(NetworkState.CONNECTED);
}
});
}
/**
* Dispatch a single event in the UI thread.
*
* @param type
* @param oldValue
* @param newValue
*/
private void dispatchEvent(EventType type, Object oldValue, Object newValue) {
final WeaponEvent event = new WeaponEvent(manager, type, oldValue, newValue);
SwingUtilities.invokeLater(
new Runnable() {
@Override
public void run() {
eventSupport.firePropertyChange(event);
}
});
}
}