/**
* Serves the incoming connections.
*
* @throws IOException
* @throws DirectoryException
*/
private void serveIncomingConnections() throws IOException, DirectoryException {
int selectorState = selector.select();
// We can't rely on return value of select to determine if any keys
// are ready.
// see http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4850373
for (Iterator<SelectionKey> iterator = selector.selectedKeys().iterator();
iterator.hasNext(); ) {
SelectionKey key = iterator.next();
iterator.remove();
if (key.isAcceptable()) {
// Accept the new client connection.
ServerSocketChannel serverChannel = (ServerSocketChannel) key.channel();
SocketChannel clientChannel = serverChannel.accept();
if (clientChannel != null) {
acceptConnection(clientChannel);
}
}
if (selectorState == 0 && enabled && !shutdownRequested && logger.isTraceEnabled()) {
// Selected keys was non empty but select() returned 0.
// Log warning and hope it blocks on the next select() call.
logger.trace(
"Selector.select() returned 0. "
+ "Selected Keys: %d, Interest Ops: %d, Ready Ops: %d ",
selector.selectedKeys().size(), key.interestOps(), key.readyOps());
}
}
}
/**
* Cleans up the contents of the selector, closing any server socket channels that might be
* associated with it. Any connections that might have been established through those channels
* should not be impacted.
*/
private void cleanUpSelector() {
try {
for (SelectionKey key : selector.keys()) {
try {
key.cancel();
} catch (Exception e) {
logger.traceException(e);
}
try {
key.channel().close();
} catch (Exception e) {
logger.traceException(e);
}
}
} catch (Exception e) {
logger.traceException(e);
}
}