Java Utililty Methods SocketChannel

ServerSocketChannel createServerSocketChannel(int aPort, String aHostname)
Creates a ServerSocketChannel

ServerSocketChannel lServer = ServerSocketChannel.open();
lServer.configureBlocking(false);
if (null == aHostname) {
 lServer.socket().bind(new InetSocketAddress(aPort));
} else {
 lServer.socket().bind(new InetSocketAddress(InetAddress.getByName(aHostname), aPort));
return lServer;
...

IOException enhanceExceptionWithAddress(final SocketChannel channel, final IOException e)
Added a socket address to a message of an IOException.

try {
 if (channel == null) {
 return e;
 final SocketAddress socketAddress = channel.socket().getRemoteSocketAddress();
 if (socketAddress == null) {
 return e;
 @SuppressWarnings("ObjectToString")
 final String socketAddressAsString = socketAddress.toString();
 final IOException result = new IOException(
 e.getMessage() == null ? socketAddressAsString : socketAddressAsString + ':' + e.getMessage());
 result.setStackTrace(e.getStackTrace());
 return result;
} catch (final Throwable ignored) {
 return e;

boolean finishConnect(SocketChannel socketChannel)
finish Connect

boolean result = false;
try {
 if (socketChannel != null) {
 result = socketChannel.finishConnect();
} catch (Exception ex) {
return result;
...

SocketChannel getConnectedSocketChannel(InetAddress host, int port, int timeout)
This will attempt to connect to the passed host and port.

SocketChannel sChannel = null;
try {
 sChannel = SocketChannel.open();
 sChannel.configureBlocking(false);
 sChannel.connect(new InetSocketAddress(host, port));
 long startConnectTime = System.currentTimeMillis();
 do {
 if (!sChannel.finishConnect()) {
...

InetSocketAddress getSocketAddress(SocketChannel socketChannel)
get Socket Address

String hostAddress = socketChannel.socket().getInetAddress().getHostAddress();
int port = socketChannel.socket().getPort();
return InetSocketAddress.createUnresolved(hostAddress, port);

String getSocketDisplayString(SocketChannel channel)
get Socket Display String

Socket socket = channel.socket();
String identifier = "disconnected";
if (socket != null) {
 InetAddress localAddress = socket.getLocalAddress();
 String localAddressStr = localAddress == null ? "null"
 : localAddress.toString() + ":" + socket.getLocalPort();
 InetAddress remoteAddress = socket.getInetAddress();
 String remoteAddressStr = remoteAddress == null ? "null"
...

SocketChannel openSocketChannel(SocketAddress sa)
Utility method for working around leak in SocketChannel.open( SocketAddress ) method.

SocketChannel sc = SocketChannel.open();
try {
 sc.connect(sa);
 return sc;
} catch (RuntimeException exc) {
 try {
 sc.close();
 } catch (IOException ioe) {
...

boolean pingWithSocketChannel()
ping With Socket Channel

boolean connected = false;
Socket socket = null;
try {
 SocketChannel socketChannel = SocketChannel
 .open(new InetSocketAddress(IPv6_ONLY_SERVER_IP, IPv6_ONLY_SERVER_PORT));
 socket = socketChannel.socket();
 out.println("Created!");
 connected = true;
...

String remoteAddress(SocketChannel channel)
remote Address

SocketAddress addr = channel.socket().getRemoteSocketAddress();
String res = String.format("%s", addr);
return res;

void sendFile(FileChannel fileChannel, SocketChannel socketChannel)
send File

long pos = 0;
long fileSize = fileChannel.size();
long remainingBytes = fileSize;
long transferredBytes = 0;
while ((transferredBytes += fileChannel.transferTo(pos, remainingBytes, socketChannel)) < fileSize) {
 pos += transferredBytes;
 remainingBytes -= transferredBytes;
socketChannel.socket().getOutputStream().flush();