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


    protected <C> Connector<C> createServerConnector(SelectableChannel c, C context, Listener<C> l)
    {
        SelectionKey key = registerInterest(c,SelectionKey.OP_READ);
        Connector<C> co = new ConnectorImpl<C>(this, l, new SaslServerImpl(),(SocketChannel)c, context, key);
        key.attach(co);
        return co;
    }


    private <C> SelectionKey registerInterest(SelectableChannel c, int opKeys)
    {

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                            sk.interestOps(sk.interestOps() & (~ops));
                            if (SelectionKey.OP_WRITE==(ops&SelectionKey.OP_WRITE)) countDown(key.getWriteLatch());
                            if (SelectionKey.OP_READ==(ops&SelectionKey.OP_READ))countDown(key.getReadLatch());
                            if (sk.interestOps()==0) {
                                sk.cancel();
                                sk.attach(null);
                            }
                        }
                    }catch (CancelledKeyException cx) {
                        if (sk!=null) {
                            sk.cancel();

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

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    public Object getAttachment(boolean remove) {
        Poller pol = getPoller();
        Selector sel = pol!=null?pol.getSelector():null;
        SelectionKey key = sel!=null?getIOChannel().keyFor(sel):null;
        Object att = key!=null?key.attachment():null;
        if (key != null && att != null && remove ) key.attach(null);
        return att;
    }
    /**
     * getBufHandler
     *

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            selector.wakeup();
            SelectionKey key = ch.register(selector, 0);


            ReactiveAsyncKey asyncKey = new ReactiveAsyncKey(key);
            key.attach(asyncKey);
            return asyncKey;
        }
    }


    /**

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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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        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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                            } else {
                                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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      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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        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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