@Override
public default void setOptions(AsynchronousSocketChannel channel) {
try {
channel.setOption(StandardSocketOptions.TCP_NODELAY, true);
channel.setOption(StandardSocketOptions.SO_RCVBUF, setRCV());
channel.setOption(StandardSocketOptions.SO_SNDBUF, setSNF());
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public Result attempt(
final List<AvailObject> args, final Interpreter interpreter, final boolean skipReturnCheck) {
assert args.size() == 2;
final AvailObject handle = args.get(0);
final AvailObject options = args.get(1);
final AvailObject pojo = handle.getAtomProperty(AtomDescriptor.socketKey());
if (pojo.equalsNil()) {
return interpreter.primitiveFailure(
handle.isAtomSpecial() ? E_SPECIAL_ATOM : E_INVALID_HANDLE);
}
final AsynchronousSocketChannel socket = (AsynchronousSocketChannel) pojo.javaObjectNotNull();
try {
for (final MapDescriptor.Entry entry : options.mapIterable()) {
final AvailObject key = entry.key();
final AvailObject entryValue = entry.value();
assert key != null;
@SuppressWarnings("rawtypes")
final SocketOption option = socketOptions[key.extractInt()];
final Class<?> type = option.type();
if (type.equals(Boolean.class) && entryValue.isBoolean()) {
final SocketOption<Boolean> booleanOption = option;
socket.setOption(booleanOption, entryValue.extractBoolean());
} else if (type.equals(Integer.class) && entryValue.isInt()) {
final Integer value = entryValue.extractInt();
socket.<Integer>setOption(option, value);
} else {
return interpreter.primitiveFailure(E_INCORRECT_ARGUMENT_TYPE);
}
}
return interpreter.primitiveSuccess(NilDescriptor.nil());
} catch (final IllegalArgumentException e) {
return interpreter.primitiveFailure(E_INCORRECT_ARGUMENT_TYPE);
} catch (final IOException e) {
return interpreter.primitiveFailure(E_IO_ERROR);
}
}
public static void main(String[] args) {
final int DEFAULT_PORT = 5555;
final String IP = "127.0.0.1";
// create asynchronous socket channel bound to the default group
try (AsynchronousSocketChannel asynchronousSocketChannel = AsynchronousSocketChannel.open()) {
if (asynchronousSocketChannel.isOpen()) {
// set some options
asynchronousSocketChannel.setOption(StandardSocketOptions.SO_RCVBUF, 128 * 1024);
asynchronousSocketChannel.setOption(StandardSocketOptions.SO_SNDBUF, 128 * 1024);
asynchronousSocketChannel.setOption(StandardSocketOptions.SO_KEEPALIVE, true);
// connect this channel's socket
asynchronousSocketChannel.connect(
new InetSocketAddress(IP, DEFAULT_PORT),
null,
new CompletionHandler<Void, Void>() {
final ByteBuffer helloBuffer = ByteBuffer.wrap("Hello !".getBytes());
final ByteBuffer buffer = ByteBuffer.allocateDirect(1024);
CharBuffer charBuffer = null;
ByteBuffer randomBuffer;
final Charset charset = Charset.defaultCharset();
final CharsetDecoder decoder = charset.newDecoder();
@Override
public void completed(Void result, Void attachment) {
try {
System.out.println(
"Successfully connected at: " + asynchronousSocketChannel.getRemoteAddress());
// transmitting data
asynchronousSocketChannel.write(helloBuffer).get();
while (asynchronousSocketChannel.read(buffer).get() != -1) {
buffer.flip();
charBuffer = decoder.decode(buffer);
System.out.println(charBuffer.toString());
if (buffer.hasRemaining()) {
buffer.compact();
} else {
buffer.clear();
}
int r = new Random().nextInt(100);
if (r == 50) {
System.out.println(
"50 was generated! Close the asynchronous socket channel!");
break;
} else {
randomBuffer =
ByteBuffer.wrap("Random number:".concat(String.valueOf(r)).getBytes());
asynchronousSocketChannel.write(randomBuffer).get();
}
}
} catch (IOException | InterruptedException | ExecutionException ex) {
System.err.println(ex);
} finally {
try {
asynchronousSocketChannel.close();
} catch (IOException ex) {
System.err.println(ex);
}
}
}
@Override
public void failed(Throwable exc, Void attachment) {
throw new UnsupportedOperationException("Connection cannot be established!");
}
});
System.in.read();
} else {
System.out.println("The asynchronous socket channel cannot be opened!");
}
} catch (IOException ex) {
System.err.println(ex);
}
}