public void run() {
try {
SocketChannel sc = SocketChannel.open();
InetSocketAddress sinaAddr = new InetSocketAddress("sina.com", 80);
sc.socket().connect(sinaAddr);
// init a selector via helper class selector provider
Selector aSel = SelectorProvider.provider().openSelector();
Socket soc = new Socket("host", 80);
soc.getChannel().register(aSel, SelectionKey.OP_ACCEPT);
// init a channel for server socket. method 1
ServerSocketChannel ssc = ServerSocketChannel.open();
ssc.configureBlocking(true);
// method 2, get server socket first, then init its channel
ServerSocket ss = new ServerSocket();
ServerSocketChannel ssc2 = ss.getChannel();
// set socket channel as non blocking.
ssc.configureBlocking(false);
InetSocketAddress isa = new InetSocketAddress("localhost", 9999);
ssc.socket().bind(isa);
SelectionKey acceptKey = ssc.register(aSel, SelectionKey.OP_ACCEPT);
int keysAdded = 0;
while ((keysAdded = aSel.select()) > 0) {
Set readyKeys = aSel.selectedKeys();
Iterator i = readyKeys.iterator();
while (i.hasNext()) {
SelectionKey sk = (SelectionKey) i.next();
i.remove();
ServerSocketChannel n = (ServerSocketChannel) sk.channel();
// now we got a new socket and its channel after accept in server
Socket s = n.accept().socket();
SocketChannel socketChannel = s.getChannel();
socketChannel.register(aSel, SelectionKey.OP_READ);
}
}
} catch (Exception e) {
}
}
public void run() {
// Here's where everything happens. The select method will
// return when any operations registered above have occurred, the
// thread has been interrupted, etc.
try {
while (!stop) {
try {
if (selector.select() > 0) {
if (stop) {
break;
}
// Someone is ready for I/O, get the ready keys
Set readyKeys = selector.selectedKeys();
Iterator it = readyKeys.iterator();
// Walk through the ready keys collection and process date requests.
while (it.hasNext()) {
SelectionKey sk = (SelectionKey) it.next();
it.remove();
SocketChannel readChannel = null;
TcpAddress incomingAddress = null;
if (sk.isAcceptable()) {
// The key indexes into the selector so you
// can retrieve the socket that's ready for I/O
ServerSocketChannel nextReady = (ServerSocketChannel) sk.channel();
// Accept the date request and send back the date string
Socket s = nextReady.accept().socket();
readChannel = s.getChannel();
readChannel.configureBlocking(false);
readChannel.register(selector, SelectionKey.OP_READ);
incomingAddress = new TcpAddress(s.getInetAddress(), s.getPort());
SocketEntry entry = new SocketEntry(incomingAddress, s);
sockets.put(incomingAddress, entry);
timeoutSocket(entry);
TransportStateEvent e =
new TransportStateEvent(
DefaultTcpTransportMapping.this,
incomingAddress,
TransportStateEvent.STATE_CONNECTED,
null);
fireConnectionStateChanged(e);
} else if (sk.isReadable()) {
readChannel = (SocketChannel) sk.channel();
incomingAddress =
new TcpAddress(
readChannel.socket().getInetAddress(), readChannel.socket().getPort());
} else if (sk.isWritable()) {
try {
SocketEntry entry = (SocketEntry) sk.attachment();
SocketChannel sc = (SocketChannel) sk.channel();
if (entry != null) {
writeMessage(entry, sc);
}
} catch (IOException iox) {
if (logger.isDebugEnabled()) {
iox.printStackTrace();
}
logger.warn(iox);
TransportStateEvent e =
new TransportStateEvent(
DefaultTcpTransportMapping.this,
incomingAddress,
TransportStateEvent.STATE_DISCONNECTED_REMOTELY,
iox);
fireConnectionStateChanged(e);
sk.cancel();
}
} else if (sk.isConnectable()) {
try {
SocketEntry entry = (SocketEntry) sk.attachment();
SocketChannel sc = (SocketChannel) sk.channel();
if ((!sc.isConnected()) && (sc.finishConnect())) {
sc.configureBlocking(false);
logger.debug("Connected to " + entry.getPeerAddress());
// make sure conncetion is closed if not used for timeout
// micro seconds
timeoutSocket(entry);
sc.register(selector, SelectionKey.OP_WRITE, entry);
}
TransportStateEvent e =
new TransportStateEvent(
DefaultTcpTransportMapping.this,
incomingAddress,
TransportStateEvent.STATE_CONNECTED,
null);
fireConnectionStateChanged(e);
} catch (IOException iox) {
if (logger.isDebugEnabled()) {
iox.printStackTrace();
}
logger.warn(iox);
sk.cancel();
}
}
if (readChannel != null) {
try {
readMessage(sk, readChannel, incomingAddress);
} catch (IOException iox) {
// IO exception -> channel closed remotely
if (logger.isDebugEnabled()) {
iox.printStackTrace();
}
logger.warn(iox);
sk.cancel();
readChannel.close();
TransportStateEvent e =
new TransportStateEvent(
DefaultTcpTransportMapping.this,
incomingAddress,
TransportStateEvent.STATE_DISCONNECTED_REMOTELY,
iox);
fireConnectionStateChanged(e);
}
}
}
}
} catch (NullPointerException npex) {
// There seems to happen a NullPointerException within the select()
npex.printStackTrace();
logger.warn("NullPointerException within select()?");
}
processPending();
}
if (ssc != null) {
ssc.close();
}
} catch (IOException iox) {
logger.error(iox);
lastError = iox;
}
if (!stop) {
stop = true;
synchronized (DefaultTcpTransportMapping.this) {
server = null;
}
}
}