Examples of DatagramChannel

io.netty.channel.socket.DatagramChannel
A UDP/IP {@link Channel} which is created by {@link DatagramChannelFactory}. @apiviz.landmark @apiviz.composedOf io.netty.channel.socket.DatagramChannelConfig
java.nio.channels.DatagramChannel
A DatagramChannel is a selectable channel for part abstraction of datagram socket. The socket method of this class can return the related DatagramSocket instance, which can handle the socket.
A datagram channel is open but not connected when created by open method. After connected, it will keep the connected status before disconnecting or closing. The benefit of a connected channel is the reduced effort of security checks during send and receive. When invoking read or write, a connected channel is required.

Datagram channels are thread-safe, no more than one thread can read or write at given time.
org.jboss.netty.channel.socket.DatagramChannel
A UDP datagram {@link Channel} which is created by {@link DatagramChannelFactory}. @author The Netty Project (netty-dev@lists.jboss.org) @author Trustin Lee (tlee@redhat.com) @version $Rev: 1025 $, $Date: 2009-03-12 21:22:01 +0900 (Thu, 12 Mar 2009) $ @apiviz.composedOf org.jboss.netty.channel.socket.DatagramChannelConfig

Examples of java.nio.channels.DatagramChannel

        if (!key.isValid()) {
            return false;
        }
        key.interestOps(key.interestOps() & (~SelectionKey.OP_WRITE));


        DatagramChannel ch = session.getChannel();
        Queue<WriteRequest> writeRequestQueue = session.getWriteRequestQueue();


        int writtenBytes = 0;
        int maxWrittenBytes = ((DatagramSessionConfig) session.getConfig()).getSendBufferSize() << 1;
        try {
            for (;;) {
                WriteRequest req = writeRequestQueue.peek();
    
                if (req == null)
                    break;
    
                ByteBuffer buf = (ByteBuffer) req.getMessage();
                if (buf.remaining() == 0) {
                    // pop and fire event
                    writeRequestQueue.poll();
    
                    session.increaseWrittenMessages();
                    buf.reset();
                    session.getFilterChain().fireMessageSent(session, req);
                    continue;
                }
    
                SocketAddress destination = req.getDestination();
                if (destination == null) {
                    destination = session.getRemoteAddress();
                }
    
                int localWrittenBytes = ch.send(buf.buf(), destination);
                writtenBytes += localWrittenBytes;
    
                if (localWrittenBytes == 0 || writtenBytes >= maxWrittenBytes) {
                    // Kernel buffer is full or wrote too much
                    key.interestOps(key.interestOps() | SelectionKey.OP_WRITE);

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Examples of java.nio.channels.DatagramChannel

            RegistrationRequest req = registerQueue.poll();


            if (req == null)
                break;


            DatagramChannel ch = null;
            try {
                ch = DatagramChannel.open();
                DatagramSessionConfig cfg;
                if (req.config.getSessionConfig() instanceof DatagramSessionConfig) {
                    cfg = (DatagramSessionConfig) req.config.getSessionConfig();
                } else {
                    cfg = getDefaultConfig().getSessionConfig();
                }


                ch.socket().setReuseAddress(cfg.isReuseAddress());
                ch.socket().setBroadcast(cfg.isBroadcast());
                ch.socket().setReceiveBufferSize(cfg.getReceiveBufferSize());
                ch.socket().setSendBufferSize(cfg.getSendBufferSize());


                if (ch.socket().getTrafficClass() != cfg.getTrafficClass()) {
                    ch.socket().setTrafficClass(cfg.getTrafficClass());
                }


                ch.configureBlocking(false);
                ch.socket().bind(req.address);
                if (req.address == null || req.address.getPort() == 0) {
                    req.address = (InetSocketAddress) ch.socket()
                            .getLocalSocketAddress();
                }
                ch.register(selector, SelectionKey.OP_READ, req);
                channels.put(req.address, ch);


                getListeners().fireServiceActivated(this, req.address,
                        req.handler, req.config);
            } catch (Throwable t) {
                req.exception = t;
            } finally {
                synchronized (req) {
                    req.done = true;
                    req.notify();
                }


                if (ch != null && req.exception != null) {
                    try {
                        ch.disconnect();
                        ch.close();
                    } catch (Throwable e) {
                        ExceptionMonitor.getInstance().exceptionCaught(e);
                    }
                }
            }

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Examples of java.nio.channels.DatagramChannel


            if (request == null) {
                break;
            }


            DatagramChannel ch = channels.remove(request.address);


            // close the channel
            try {
                if (ch == null) {
                    request.exception = new IllegalArgumentException(
                            "Address not bound: " + request.address);
                } else {
                    SelectionKey key = ch.keyFor(selector);
                    request.registrationRequest = (RegistrationRequest) key
                            .attachment();
                    key.cancel();
                    selector.wakeup(); // wake up again to trigger thread death
                    ch.disconnect();
                    ch.close();
                }
            } catch (Throwable t) {
                ExceptionMonitor.getInstance().exceptionCaught(t);
            } finally {
                synchronized (request) {

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Examples of java.nio.channels.DatagramChannel

    }
    
    public void test_write_LBuffer_positioned() throws Exception {
        // Regression test for Harmony-683
        int position = 16;
        DatagramChannel dc = DatagramChannel.open();
        byte[] sourceArray = new byte[CAPACITY_NORMAL];        
        dc.connect(localAddr1);
        // write
        ByteBuffer sourceBuf = ByteBuffer.wrap(sourceArray);
        sourceBuf.position(position);
        assertEquals(CAPACITY_NORMAL - position, dc.write(sourceBuf));
    }

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Examples of java.nio.channels.DatagramChannel

    public void test_send_LBuffer_LSocketAddress_PositionNotZero()
            throws Exception {
        // regression test for Harmony-701
        int CAPACITY_NORMAL = 256;
        int position = 16;
        DatagramChannel dc = DatagramChannel.open();
        byte[] sourceArray = new byte[CAPACITY_NORMAL];
        // send ByteBuffer whose position is not zero
        ByteBuffer sourceBuf = ByteBuffer.wrap(sourceArray);
        sourceBuf.position(position);
        int ret = dc.send(sourceBuf, localAddr1);
        // assert send (256 - 16) bytes  
        assertEquals(CAPACITY_NORMAL - position, ret);
        // assert the position of ByteBuffer has been set
        assertEquals(CAPACITY_NORMAL, sourceBuf.position());
    }

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Examples of java.nio.channels.DatagramChannel

     * @tests DatagramChannel#read(ByteBuffer)
     */
    public void test_read_LByteBuffer_closed_nullBuf() throws Exception {
        // regression test for Harmony-754
        ByteBuffer c = null;
        DatagramChannel channel = DatagramChannel.open();
        channel.close();
        try{
            channel.read(c);
            fail("Should throw NullPointerException");
        } catch (NullPointerException e){
            // expected
        }
    }

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Examples of java.nio.channels.DatagramChannel

     * @tests DatagramChannel#read(ByteBuffer)
     */
    public void test_read_LByteBuffer_NotConnected_nullBuf() throws Exception {
        // regression test for Harmony-754
        ByteBuffer c = null;
        DatagramChannel channel = DatagramChannel.open();
        try{
            channel.read(c);
            fail("Should throw NullPointerException");
        } catch (NullPointerException e){
            // expected
        }
    }

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Examples of java.nio.channels.DatagramChannel

     * @tests DatagramChannel#read(ByteBuffer)
     */
    public void test_read_LByteBuffer_readOnlyBuf() throws Exception {
        // regression test for Harmony-754
        ByteBuffer c = ByteBuffer.allocate(1);
        DatagramChannel channel = DatagramChannel.open();
        try{
            channel.read(c.asReadOnlyBuffer());
            fail("Should throw NotYetConnectedException");
        } catch (NotYetConnectedException e){
            // expected
        }
        channel.connect(localAddr1);
        try{
            channel.read(c.asReadOnlyBuffer());
            fail("Should throw IllegalArgumentException");
        } catch (IllegalArgumentException e){
            // expected
        }
    }

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Examples of java.nio.channels.DatagramChannel

    /**
     * @tests DatagramChannel#socket()
     */
    public void test_socket_IllegalBlockingModeException() throws Exception {
        // regression test for Harmony-1036
        DatagramChannel channel = DatagramChannel.open();
        channel.configureBlocking(false);
        DatagramSocket socket = channel.socket();
        try {
            socket.send(null);
            fail("should throw IllegalBlockingModeException");
        } catch (IllegalBlockingModeException e) {
            // expected

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Examples of java.nio.channels.DatagramChannel

        {
            throw new IllegalArgumentException( "Unexpected local address type: "
                                                + localAddress.getClass() );
        }
        
        DatagramChannel ch = DatagramChannel.open();
        boolean initialized = false;
        try
        {
            ch.socket().setReuseAddress( true );
            if( localAddress != null )
            {
                ch.socket().bind( localAddress );
            }
            ch.connect( address );
            ch.configureBlocking( false );
            initialized = true;
        }
        finally
        {
            if( !initialized )
            {
                ch.close();
            }
        }


        RegistrationRequest request = new RegistrationRequest( ch, handler );
        synchronized( this )

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