/**
* Creates a new ConnectionHandler object
*
* @param sChannel the SocketChannel of the client
* @param data a reference to a ReactorData object
*/
private ConnectionHandler(SocketChannel sChannel, ReactorData<T> data, SelectionKey key) {
_sChannel = sChannel;
_data = data;
_protocol = _data.getProtocolMaker().create();
_tokenizer = _data.getTokenizerMaker().create();
_skey = key;
}
/**
* Stops the Reactor activity, including the Reactor thread and the Worker Threads in the Thread
* Pool.
*/
public synchronized void stopReactor() {
if (!_shouldRun) return;
_shouldRun = false;
_data.getSelector().wakeup(); // Force select() to return
_data.getExecutor().shutdown();
try {
_data.getExecutor().awaitTermination(2000, TimeUnit.MILLISECONDS);
} catch (InterruptedException e) {
// Someone didn't have patience to wait for the executor pool to
// close
e.printStackTrace();
}
}
/**
* Reads incoming data from the client:
*
* <UL>
* <LI>Reads some bytes from the SocketChannel
* <LI>create a protocolTask, to process this data, possibly generating an answer
* <LI>Inserts the Task to the ThreadPool
* </UL>
*
* @throws
* @throws IOException in case of an IOException during reading
*/
public void read() {
// do not read if OLD.protocol has terminated. only write of pending data is
// allowed
if (_protocol.shouldClose()) {
return;
}
SocketAddress address = _sChannel.socket().getRemoteSocketAddress();
logger.info("Reading from " + address);
ByteBuffer buf = ByteBuffer.allocate(BUFFER_SIZE);
int numBytesRead = 0;
try {
numBytesRead = _sChannel.read(buf);
} catch (IOException e) {
numBytesRead = -1;
}
// is the channel closed??
if (numBytesRead == -1) {
// No more bytes can be read from the channel
logger.info("client on " + address + " has disconnected");
closeConnection();
// tell the OLD.protocol that the connection terminated.
_protocol.connectionTerminated();
return;
}
// add the buffer to the OLD.protocol task
buf.flip();
_task.addBytes(buf);
// add the OLD.protocol task to the OLD.reactor
_data.getExecutor().execute(_task);
}
/**
* switches the handler to write only mode
*
* @throws ClosedChannelException if the channel is closed
*/
public void switchToWriteOnlyMode() {
_skey.interestOps(SelectionKey.OP_WRITE);
_data.getSelector().wakeup();
}
/**
* switches the handler to read only mode
*
* @throws ClosedChannelException if the channel is closed
*/
public void switchToReadOnlyMode() {
_skey.interestOps(SelectionKey.OP_READ);
_data.getSelector().wakeup();
}
/**
* switches the handler to read / write TODO Auto-generated catch blockmode
*
* @throws ClosedChannelException if the channel is closed
*/
public void switchToReadWriteMode() {
_skey.interestOps(SelectionKey.OP_READ | SelectionKey.OP_WRITE);
_data.getSelector().wakeup();
}
