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

                                        + sc.socket().getRemoteSocketAddress());
                                sc.configureBlocking(false);
                                SelectionKey sk = sc.register(selector,
                                        SelectionKey.OP_READ);
                                NIOServerCnxn cnxn = createConnection(sc, sk);
                                sk.attach(cnxn);
                                addCnxn(cnxn);
                            }
                        } else if ((k.readyOps() & (SelectionKey.OP_READ | SelectionKey.OP_WRITE)) != 0) {
                            NIOServerCnxn c = (NIOServerCnxn) k.attachment();
                            c.doIO(k);

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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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        Reader reader = getReader();
        try {
          reader.startAdd();
          SelectionKey readKey = reader.registerChannel(channel);
          c = new Connection(readKey, channel, System.currentTimeMillis());
          readKey.attach(c);
          synchronized (connectionList) {
            connectionList.add(numConnections, c);
            numConnections++;
          }
          if (LOG.isDebugEnabled())

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            /* re-register with selector */
            try {
                SocketChannel chan = c.getChannel();
                chan.configureBlocking (false);
                SelectionKey key = chan.register (selector, SelectionKey.OP_READ);
                key.attach (c);
                c.selectionKey = key;
                c.time = getTime() + idleInterval;
                idleConnections.add (c);
            } catch (IOException e) {
                dprint(e);

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                            chan.configureBlocking (false);
                            SelectionKey newkey = chan.register (selector, SelectionKey.OP_READ);
                            HttpConnection c = new HttpConnection (ServerImpl.this);
                            c.selectionKey = newkey;
                            c.setChannel (chan);
                            newkey.attach (c);
                            requestStarted (c);
                            allConnections.add (c);
                        } else {
                            try {
                                if (key.isReadable()) {

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      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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        Reader reader = getReader();
        try {
          reader.startAdd();
          SelectionKey readKey = reader.registerChannel(channel);
          c = getConnection(channel, System.currentTimeMillis());
          readKey.attach(c);
          synchronized (connectionList) {
            connectionList.add(numConnections, c);
            numConnections++;
          }
          if (LOG.isDebugEnabled())

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

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        if (key == null) {
            LOG.error("Trying to modify the registration of a not registered channel");
            return;
        }
        key.cancel();
        key.attach(null);


        if (IS_DEBUG) {
            LOG.debug("unregistering : {} done !", listener);
        }
    }

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                                  sk.cancel();
                                  sk.attach(null);
                              }
                            }else {
                                sk.cancel();
                                sk.attach(null);
                            }
                        }
                    }catch (CancelledKeyException cx) {
                        if (sk!=null) {
                            sk.cancel();

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