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

    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;
    }


    public ApplicationBufferHandler getBufHandler() {
        return bufHandler;

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                    iterator.remove();
                    KeyAttachment attachment = (KeyAttachment)sk.attachment();
                    try {
                        if ( sk.isValid() && attachment != null ) {
                            attachment.access();
                            sk.attach(attachment);
                            sk.interestOps(0); //this is a must, so that we don't have multiple threads messing with the socket
                            attachment.interestOps(0);
                            NioChannel channel = attachment.getChannel();
                            if (sk.isReadable() || sk.isWritable() ) {
                                if ( attachment.getComet() ) {

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                                try {
                                    KeyAttachment att = (KeyAttachment)socket.getAttachment(true);
                                    try {socket.close();}catch (Exception ignore){}
                                    if ( socket.isOpen() ) socket.close(true);
                                    key.cancel();
                                    key.attach(null);
                                    nioChannels.offer(socket);
                                    if ( att!=null ) keyCache.offer(att);
                                }catch ( Exception x ) {
                                    log.error("",x);
                                }

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                                try {
                                    KeyAttachment att = (KeyAttachment)socket.getAttachment(true);
                                    try {socket.close();}catch (Exception ignore){}
                                    if ( socket.isOpen() ) socket.close(true);
                                    key.cancel();
                                    key.attach(null);
                                    nioChannels.offer(socket);
                                    if ( att!=null ) keyCache.offer(att);
                                }catch ( Exception x ) {
                                    log.error("",x);
                                }

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

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

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