Examples of java.nio.channels.SelectionKey.attach()

java.nio.channels.SelectionKey.attach()
Attaches an object to the key. @param anObject the object to attach @return the last attached object

      if (transport.startConnect()) {
        registerForFirstWrite(key);
      }
    }


    key.attach(this);
  }


  void registerForFirstWrite(SelectionKey key) throws IOException {
    state = State.WRITING_REQUEST_SIZE;
    key.interestOps(SelectionKey.OP_WRITE);

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                            if (channel.isConnected())
                            {
                                key = channel.register(_selector,SelectionKey.OP_READ,att);
                                SelectChannelEndPoint endpoint = newEndPoint(channel,this,key);
                                key.attach(endpoint);
                                endpoint.dispatch();
                            }
                            else
                            {
                                channel.register(_selector,SelectionKey.OP_CONNECT,att);

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                            if (_nextSet==_setID)
                            {
                                // bind connections to this select set.
                                SelectionKey cKey = channel.register(_selectSet[_nextSet].getSelector(), SelectionKey.OP_READ);
                                SelectChannelEndPoint endpoint=newEndPoint(channel,_selectSet[_nextSet],cKey);
                                cKey.attach(endpoint);
                                if (endpoint != null)
                                    endpoint.dispatch();
                            }
                            else
                            {

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      ServerSocketChannel server = (ServerSocketChannel) key.channel();
      SocketChannel channel = server.accept();
      channel.configureBlocking(false);
      SelectionKey readKey = channel.register(selector, SelectionKey.OP_READ);
      c = new Connection(readKey, channel, System.currentTimeMillis());
      readKey.attach(c);
      synchronized (connectionList) {
        connectionList.add(numConnections, c);
        numConnections++;
      }
      if (LOG.isDebugEnabled())

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                    if ((k.readyOps() & SelectionKey.OP_ACCEPT) != 0) {
                        SocketChannel sc = ((ServerSocketChannel) k.channel()).accept();
                        sc.configureBlocking(false);
                        SelectionKey sk = sc.register(selector, SelectionKey.OP_READ);
                        Cnxn cnxn = new Cnxn(sc, sk);
                        sk.attach(cnxn);
                        addCnxn(cnxn);
                    } else if ((k.readyOps() & (SelectionKey.OP_READ | SelectionKey.OP_WRITE)) != 0) {
                        Cnxn c = (Cnxn) k.attachment();
                        c.doIO(k);
                    }

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            } else {
                if (!key.isValid()) {
                    throw new CancelledKeyException();
                }
                key.interestOps(interestSet);
                key.attach(attachment);
            }
            return key;
        }
    }

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            Iterator<SelectionKey> it = selector.keys().iterator();
            // look at each key in the selected set
            while (it.hasNext()) {
                SelectionKey key = it.next();
                key.channel().close();
                key.attach(null);
                key.cancel();
            }
        }catch ( IOException ignore ){
            if (log.isWarnEnabled()) {
                log.warn("Unable to cleanup on selector close.",ignore);

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      ServerSocketChannel server = (ServerSocketChannel) key.channel();
      SocketChannel channel = server.accept();
      channel.configureBlocking(false);
      SelectionKey readKey = channel.register(selector, SelectionKey.OP_READ);
      c = new Connection(readKey, channel, System.currentTimeMillis());
      readKey.attach(c);
      synchronized (connectionList) {
        connectionList.add(numConnections, c);
        numConnections++;
      }
      if (LOG.isDebugEnabled())

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      SelectionKey clientKey = null;
      try {
        clientKey = accepted.registerSelector(selector, SelectionKey.OP_READ);


        FrameBuffer frameBuffer = new FrameBuffer(accepted, clientKey, SelectorThread.this);
        clientKey.attach(frameBuffer);
      } catch (IOException e) {
        LOGGER.warn("Failed to register accepted connection to selector!", e);
        if (clientKey != null) {
          cleanupSelectionKey(clientKey);
        }

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        channel.configureBlocking(false);
        channel.socket().setTcpNoDelay(tcpNoDelay);
        SelectionKey readKey = channel.register(selector, SelectionKey.OP_READ);
        c = new Connection(readKey, channel, System.currentTimeMillis());
        readKey.attach(c);
        synchronized (connectionList) {
          connectionList.add(numConnections, c);
          numConnections++;
        }
        if (LOG.isDebugEnabled())

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