Examples of java.nio.channels.Selector.keys()

java.nio.channels.Selector.keys()
Returns this selector's key set.
The key set is not directly modifiable. A key is removed only after it has been cancelled and its channel has been deregistered. Any attempt to modify the key set will cause an {@link UnsupportedOperationException} to be thrown.
The key set is not thread-safe.
@return This selector's key set @throws ClosedSelectorException If this selector is closed

    protected void socketTimeouts() {
        long now = System.currentTimeMillis();
        if ( (now-lastCheck) < getSelectorTimeout() ) return;
        //timeout
        Selector tmpsel = selector;
        Set keys =  (isListening()&&tmpsel!=null)?tmpsel.keys():null;
        if ( keys == null ) return;
        for (Iterator iter = keys.iterator(); iter.hasNext(); ) {
            SelectionKey key = (SelectionKey) iter.next();
            try {
//                if (key.interestOps() == SelectionKey.OP_READ) {

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    protected void socketTimeouts() {
        long now = System.currentTimeMillis();
        if ( (now-lastCheck) < getSelectorTimeout() ) return;
        //timeout
        Selector tmpsel = this.selector.get();
        Set<SelectionKey> keys =  (isListening()&&tmpsel!=null)?tmpsel.keys():null;
        if ( keys == null ) return;
        for (Iterator<SelectionKey> iter = keys.iterator(); iter.hasNext();) {
            SelectionKey key = iter.next();
            try {
//                if (key.interestOps() == SelectionKey.OP_READ) {

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    private void closeSelector() throws IOException {
        Selector selector = this.selector.getAndSet(null);
        if (selector==null) return;
        try {
            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);

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                    }


                    flushSessions();
                    cancelKeys();


                    if (selector.keys().isEmpty()) {
                        synchronized (DatagramAcceptorDelegate.this) {
                            if (selector.keys().isEmpty()
                                    && registerQueue.isEmpty()
                                    && cancelQueue.isEmpty()) {
                                worker = null;

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                    flushSessions();
                    cancelKeys();


                    if (selector.keys().isEmpty()) {
                        synchronized (DatagramAcceptorDelegate.this) {
                            if (selector.keys().isEmpty()
                                    && registerQueue.isEmpty()
                                    && cancelQueue.isEmpty()) {
                                worker = null;
                                try {
                                    selector.close();

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    protected void socketTimeouts() {
        long now = System.currentTimeMillis();
        if ( (now-lastCheck) < getSelectorTimeout() ) return;
        //timeout
        Selector tmpsel = selector;
        Set keys =  (isListening()&&tmpsel!=null)?tmpsel.keys():null;
        if ( keys == null ) return;
        for (Iterator iter = keys.iterator(); iter.hasNext(); ) {
            SelectionKey key = (SelectionKey) iter.next();
            try {
//                if (key.interestOps() == SelectionKey.OP_READ) {

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                    }


                    flushSessions();
                    cancelKeys();


                    if (selector.keys().isEmpty()) {
                        synchronized (DatagramConnectorDelegate.this) {
                            if (selector.keys().isEmpty()
                                    && registerQueue.isEmpty()
                                    && cancelQueue.isEmpty()) {
                                worker = null;

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                    flushSessions();
                    cancelKeys();


                    if (selector.keys().isEmpty()) {
                        synchronized (DatagramConnectorDelegate.this) {
                            if (selector.keys().isEmpty()
                                    && registerQueue.isEmpty()
                                    && cancelQueue.isEmpty()) {
                                worker = null;
                                try {
                                    selector.close();

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    protected void socketTimeouts() {
        long now = System.currentTimeMillis();
        if ( (now-lastCheck) < getSelectorTimeout() ) return;
        //timeout
        Selector tmpsel = selector;
        Set keys =  (isListening()&&tmpsel!=null)?tmpsel.keys():null;
        if ( keys == null ) return;
        for (Iterator iter = keys.iterator(); iter.hasNext(); ) {
            SelectionKey key = (SelectionKey) iter.next();
            try {
//                if (key.interestOps() == SelectionKey.OP_READ) {

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        // process idle sessions
        long currentTime = System.currentTimeMillis();
        if ((currentTime - lastIdleCheckTime) >= 1000) {
            lastIdleCheckTime = currentTime;
            Selector selector = getSelector();
            Set keys = selector.keys();
            if (keys != null) {
                for (Iterator it = keys.iterator(); it.hasNext();) {
                    SelectionKey key = (SelectionKey) it.next();
                    SocketSessionImpl session = (SocketSessionImpl) key
                            .attachment();

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