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

java.nio.channels.SelectionKey.interestOps()
Gets the interesting operation of this key. @return the interesting operation of this key @throws CancelledKeyException If the key has been cancelled already

                // Check that op isn't already in the interest set
                assert (interestOps & op) == 0;


                interestOps |= op;
    try {
        key.interestOps(interestOps);
    } catch (CancelledKeyException e) {
        throw new ClosedAsynchronousChannelException();
    }
            }

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            while(buffer.hasRemaining()) {
                int count = channel.write(buffer);
                if(count == 0) {
                    synchronized(this) {
                        SelectionKey key = channel.keyFor(selector);
                        key.interestOps(SelectionKey.OP_WRITE);
                        if(log.isDebugEnabled())
                            log.debug("Blocking for channel write: "+buffer.remaining());
                        try {
                            wait();
                        } catch(InterruptedException iex) {

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                        try {
                            wait();
                        } catch(InterruptedException iex) {
                            // ignore, since can't happen
                        }
                        key.interestOps(SelectionKey.OP_READ);
                    }
                }
            }
            buffer.clear();
        }

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                                att.setCometNotify(false);
                            }
                            interestOps = (interestOps & (~OP_CALLBACK));//remove the callback flag
                            att.access();//to prevent timeout
                            //we are registering the key to start with, reset the fairness counter.
                            int ops = key.interestOps() | interestOps;
                            att.interestOps(ops);
                            key.interestOps(ops);
                            att.setCometOps(ops);
                        } else {
                            cancel = true;

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                            interestOps = (interestOps & (~OP_CALLBACK));//remove the callback flag
                            att.access();//to prevent timeout
                            //we are registering the key to start with, reset the fairness counter.
                            int ops = key.interestOps() | interestOps;
                            att.interestOps(ops);
                            key.interestOps(ops);
                            att.setCometOps(ops);
                        } else {
                            cancel = true;
                        }
                    } else {

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                        //only timeout sockets that we are waiting for a read from - or write (send file)
                        long delta = now - ka.getLastAccess();
                        long timeout = (ka.getTimeout()==-1)?((long) socketProperties.getSoTimeout()):(ka.getTimeout());
                        boolean isTimedout = delta > timeout;
                        if ( close ) {
                            key.interestOps(0); 
                            ka.interestOps(0); //avoid duplicate stop calls
                            processKey(key,ka);
                        } else if (isTimedout) {
                            key.interestOps(0); 
                            ka.interestOps(0); //avoid duplicate timeout calls

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                        if ( close ) {
                            key.interestOps(0); 
                            ka.interestOps(0); //avoid duplicate stop calls
                            processKey(key,ka);
                        } else if (isTimedout) {
                            key.interestOps(0); 
                            ka.interestOps(0); //avoid duplicate timeout calls
                            cancelledKey(key, SocketStatus.TIMEOUT,true);
                        } else {
                            long nextTime = now+(timeout-delta);
                            nextExpiration = (nextTime < nextExpiration)?nextTime:nextExpiration;

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        Iterator<SelectionKey> it = selector.selectedKeys().iterator();
        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);

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        Iterator<SelectionKey> it = selector.selectedKeys().iterator();
        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);

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            }


            SessionRequestHandle requestHandle = new SessionRequestHandle(request); 
            try {
                key.attach(requestHandle);
                key.interestOps(SelectionKey.OP_CONNECT);
            } catch (CancelledKeyException ex) {
                // Ignore cancelled keys
            }
        }
    }

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