private boolean _isOpenImpl() throws IOException {
boolean wasBlocking = socketChannel.isBlocking();
ByteBuffer buffer = ByteBuffer.allocate(1);
if (wasBlocking) {
socketChannel.configureBlocking(false);
}
int read;
try {
read = socketChannel.read(buffer);
} catch (IOException e) {
/* This should never happen in non Windows systems.
* In Windows systems an IOException is thrown
* whenever a client has closed its output connection
* towards this channel and this method is called by
* CommCore.
*/
return false;
}
if (wasBlocking) {
socketChannel.configureBlocking(true);
}
if (read == -1) {
return false;
} else if (read > 0) {
istream.append(buffer.get(0));
}
return true;
}
/**
* Connects the socket with a remote address. A timeout of zero is interpreted as an infinite
* timeout. The connection will then block until established or an error occurs.
*
* @param endpoint The address to connect to
* @exception IOException If an error occurs
* @exception IllegalArgumentException If the address type is not supported
* @exception IllegalBlockingModeException If this socket has an associated channel, and the
* channel is in non-blocking mode
* @exception SocketTimeoutException If the timeout is reached
* @since 1.4
*/
public void connect(SocketAddress endpoint, int timeout) throws IOException {
if (closed) throw new SocketException("Socket is closed");
if (!(endpoint instanceof InetSocketAddress))
throw new IllegalArgumentException("Address type not supported");
if (ch != null && !ch.isBlocking()) throw new IllegalBlockingModeException();
impl.connect(endpoint, timeout);
}
public boolean isBlocking() {
return sc.isBlocking();
}