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

java.nio.channels.SelectionKey.attachment()
Gets the attached object. @return the attached object or null if no object has been attached

                            }
                        } 
                    } else if (handshake == -1 ) {
                        KeyAttachment ka = null;
                        if (key!=null) {
                            ka = (KeyAttachment) key.attachment();
                            socket.getPoller().cancelledKey(key, SocketStatus.DISCONNECT, false);
                        }
                        if (socket!=null) nioChannels.offer(socket);
                        socket = null;
                        if ( ka!=null ) keyCache.offer(ka);

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                        if ( ka!=null ) keyCache.offer(ka);
                        ka = null;
                    } else {
                        final SelectionKey fk = key;
                        final int intops = handshake;
                        final KeyAttachment ka = (KeyAttachment)fk.attachment();
                        ka.getPoller().add(socket,intops);
                    }
                }catch(CancelledKeyException cx) {
                    socket.getPoller().cancelledKey(key,null,false);
                } catch (OutOfMemoryError oom) {

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                                statusDropsConnection(response.getStatus());
                    }
                    // Comet support
                    SelectionKey key = socket.getIOChannel().keyFor(socket.getPoller().getSelector());
                    if (key != null) {
                        NioEndpoint.KeyAttachment attach = (NioEndpoint.KeyAttachment) key.attachment();
                        if (attach != null)  {
                            attach.setComet(comet);
                            if (comet) {
                                Integer comettimeout = (Integer) request.getAttribute("org.apache.tomcat.comet.timeout");
                                if (comettimeout != null) attach.setTimeout(comettimeout.longValue());

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            comet = false;
            cometClose = true;
            SelectionKey key = socket.getIOChannel().keyFor(socket.getPoller().getSelector());
            if ( key != null ) {
                NioEndpoint.KeyAttachment attach = (NioEndpoint.KeyAttachment) key.attachment();
                if ( attach!=null && attach.getComet()) {
                    //if this is a comet connection
                    //then execute the connection closure at the next selector loop
                    //request.getAttributes().remove("org.apache.tomcat.comet.timeout");
                    //attach.setTimeout(5000); //force a cleanup in 5 seconds

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        while (it.hasNext()) {
            SelectionKey sk = it.next();
            it.remove();
            int readyOps = sk.readyOps();
            sk.interestOps(sk.interestOps() & ~readyOps);
            NioSender sender = (NioSender) sk.attachment();
            try {
                if (sender.process(sk,waitForAck)) {
                    completed++;
                    sender.setComplete(true);
                    if ( Logs.MESSAGES.isTraceEnabled() ) {

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          synchronized (writeSelector.keys()) {
            calls = new ArrayList<Call>(writeSelector.keys().size());
            iter = writeSelector.keys().iterator();
            while (iter.hasNext()) {
              SelectionKey key = iter.next();
              Call call = (Call)key.attachment();
              if (call != null && key.channel() == call.connection.channel) { 
                calls.add(call);
              }
            }
          }

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    private void processTimeouts(final Set<SelectionKey> keys) {
        long now = System.currentTimeMillis();
        for (Iterator<SelectionKey> it = keys.iterator(); it.hasNext();) {
            SelectionKey key = it.next();
            Object attachment = key.attachment();
            
            if (attachment instanceof SessionRequestHandle) {
                SessionRequestHandle handle = (SessionRequestHandle) key.attachment();
                SessionRequestImpl sessionRequest = handle.getSessionRequest();
                int timeout = sessionRequest.getConnectTimeout();

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        for (Iterator<SelectionKey> it = keys.iterator(); it.hasNext();) {
            SelectionKey key = it.next();
            Object attachment = key.attachment();
            
            if (attachment instanceof SessionRequestHandle) {
                SessionRequestHandle handle = (SessionRequestHandle) key.attachment();
                SessionRequestImpl sessionRequest = handle.getSessionRequest();
                int timeout = sessionRequest.getConnectTimeout();
                if (timeout > 0) {
                    if (handle.getRequestTime() + timeout < now) {
                        sessionRequest.timeout();

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            } else {
                final SelectionKey key = socket.getIOChannel().keyFor(socket.getPoller().getSelector());
                try {
                    boolean cancel = false;
                    if (key != null) {
                        final KeyAttachment att = (KeyAttachment) key.attachment();
                        if ( att!=null ) {
                            //handle callback flag
                            if (att.getComet() && (interestOps & OP_CALLBACK) == OP_CALLBACK ) {
                                att.setCometNotify(true);
                            } else {

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                    Iterator iterator = keyCount > 0 ? selector.selectedKeys().iterator() : null;
                    // Walk through the collection of ready keys and dispatch
                    // any active event.
                    while (iterator != null && iterator.hasNext()) {
                        SelectionKey sk = (SelectionKey) iterator.next();
                        KeyAttachment attachment = (KeyAttachment)sk.attachment();
                        // Attachment may be null if another thread has called
                        // cancelledKey()
                        if (attachment == null) {
                            iterator.remove();
                        } else {

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