Examples of java.nio.channels.Channel

java.nio.channels.Channel
A channel is a conduit to IO services covering such items as files, sockets, hardware devices, IO ports, or some software component.
Channels are open upon creation, and can be explicitly closed. Once a channel is closed it cannot be re-opened, and attempts to perform IO operations on the closed channel result in a ClosedChannelException .

Particular implementations or sub-interfaces of Channel dictate whther they are thread-safe or not.

            return null;
        }
    }


    public SocketAddress getRemoteAddress() {
        Channel channel = this.key.channel();
        if (channel instanceof SocketChannel) {
            return ((SocketChannel)channel).socket().getRemoteSocketAddress();
        } else {
            return null;
        }

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        if (this.selector.isOpen()) {
            Set<SelectionKey> keys = this.selector.keys();
            for (Iterator<SelectionKey> it = keys.iterator(); it.hasNext(); ) {
                try {
                    SelectionKey key = it.next();
                    Channel channel = key.channel();
                    if (channel != null) {
                        channel.close();
                    }
                } catch (IOException ex) {
                    addExceptionEvent(ex);
                }
            }

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            return;
        }
        this.completed = true;
        if (this.key != null) {
            this.key.cancel();
            Channel channel = this.key.channel();
            if (channel.isOpen()) {
                try {
                    channel.close();
                } catch (IOException ignore) {}
            }
        }
        synchronized (this) {
            if (this.callback != null) {

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            return;
        }
        this.completed = true;
        if (this.key != null) {
            this.key.cancel();
            Channel channel = this.key.channel();
            if (channel.isOpen()) {
                try {
                    channel.close();
                } catch (IOException ignore) {}
            }
        }
        synchronized (this) {
            if (this.callback != null) {

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    }


    public void releaseExclusiveReadLock(GenericFileOperations<File> operations,
                                         GenericFile<File> file, Exchange exchange) throws Exception {
        if (lock != null) {
            Channel channel = lock.channel();
            try {
                lock.release();
            } finally {
                // must close channel first
                IOHelper.close(channel, "while acquiring exclusive read lock for file: " + lockFileName, LOG);

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            }


            @Override
            public String toString() {
                StringBuilder sb = new StringBuilder();
                Channel channel = sk.channel();
                if (channel instanceof SocketChannel) {
                    sb.append(" ").append(((SocketChannel) channel).socket().getRemoteSocketAddress()).append("[")
                    .append(Integer.toHexString(sk.interestOps())).append("](queued=").append(
                        getOutstandingRequests()).append(",recved=").append(getPacketsReceived()).append(
                            ",sent=").append(getPacketsSent()).append(")\n");

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        if (this.selector.isOpen()) {
            Set<SelectionKey> keys = this.selector.keys();
            for (Iterator<SelectionKey> it = keys.iterator(); it.hasNext(); ) {
                try {
                    SelectionKey key = it.next();
                    Channel channel = key.channel();
                    if (channel != null) {
                        channel.close();
                    }
                } catch (IOException ex) {
                    addExceptionEvent(ex);
                }
            }

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    public ByteChannel channel() {
        return this.channel;
    }
    
    public SocketAddress getLocalAddress() {
        Channel channel = this.key.channel();
        if (channel instanceof SocketChannel) {
            return ((SocketChannel)channel).socket().getLocalSocketAddress();
        } else {
            return null;
        }

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            return null;
        }
    }


    public SocketAddress getRemoteAddress() {
        Channel channel = this.key.channel();
        if (channel instanceof SocketChannel) {
            return ((SocketChannel)channel).socket().getRemoteSocketAddress();
        } else {
            return null;
        }

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                return packetsSent;
            }


            public String toString() {
                StringBuilder sb = new StringBuilder();
                Channel channel = sk.channel();
                if (channel instanceof SocketChannel) {
                    sb.append(" ").append(
                            ((SocketChannel) channel).socket()
                                    .getRemoteSocketAddress()).append("[")
                            .append(Integer.toHexString(sk.interestOps()))

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