Example usage for java.nio.channels Selector isOpen

Introduction

In this page you can find the example usage for java.nio.channels Selector isOpen.

Prototype

public abstract boolean isOpen();

Source Link

Document

Tells whether or not this selector is open.

Usage

From source file:gridool.communication.transport.nio.GridNioServer.java

public void accept(@Nonnull final Selector selector) throws IOException {
    while (!closed && selector.select() > 0) {
        for (Iterator<SelectionKey> iter = selector.selectedKeys().iterator(); iter.hasNext();) {
            SelectionKey key = iter.next();
            iter.remove();//from ww w  .  j  a  va2  s. c o  m

            if (!key.isValid()) { // Is key closed?
                if (LOG.isDebugEnabled()) {
                    LOG.debug("Non valid key was detected. Key is already closed?");
                }
                continue;
            }

            if (key.isAcceptable()) {
                ServerSocketChannel serverChannel = (ServerSocketChannel) key.channel();
                handleAccept(serverChannel, selector);
            } else if (key.isReadable()) {
                SocketChannel channel = (SocketChannel) key.channel();
                handleRead(channel, key, sharedReadBuf, notifier, execPool);
            }
        }
    }
    if (LOG.isInfoEnabled()) {
        LOG.info("GridNioServer is going to be closed");
    }
    this.closed = true;
    if (selector.isOpen()) {
        for (SelectionKey key : selector.keys()) {
            NIOUtils.close(key);
        }
        selector.close();
    }
}

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From source file:org.openhab.binding.lifx.internal.LifxLightDiscovery.java

public void receiveAndHandlePackets() {
    Selector localSelector = selector;

    try {//from  www.  ja  va 2 s  .c  o  m
        if (localSelector == null || !localSelector.isOpen()) {
            logger.debug("Unable to receive and handle packets with null or closed selector");
            return;
        }

        discoveredLights.clear();
        logger.trace("Entering read loop");
        long startStamp = System.currentTimeMillis();

        while (System.currentTimeMillis() - startStamp < SELECTOR_TIMEOUT) {
            int lightCount = discoveredLights.size();
            long selectStamp = System.currentTimeMillis();

            LifxSelectorUtil.receiveAndHandlePackets(localSelector, LOG_ID,
                    (packet, address) -> handlePacket(packet, address));
            requestAdditionalLightData();

            boolean discoveredNewLights = lightCount < discoveredLights.size();
            if (!discoveredNewLights) {
                boolean preventBusyWaiting = System.currentTimeMillis() - selectStamp < PACKET_INTERVAL;
                if (preventBusyWaiting) {
                    Thread.sleep(PACKET_INTERVAL);
                }
            }
        }
        logger.trace("Exited read loop");
    } catch (Exception e) {
        logger.debug("{} while receiving and handling discovery packets: {}", e.getClass().getSimpleName(),
                e.getMessage(), e);
    } finally {
        LifxSelectorUtil.closeSelector(localSelector, LOG_ID);
        selector = null;
        isScanning = false;
    }
}

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