Examples of java.nio.channels.DatagramChannel$Handle

java.nio.channels.DatagramChannel

            if( session == null )
                break;
            else
            {
                SelectionKey key = session.getSelectionKey();
                DatagramChannel ch = ( DatagramChannel ) key.channel();
                try
                {
                    ch.close();
                }
                catch( IOException e )
                {
                    exceptionMonitor.exceptionCaught( this, e );
                }

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        {
            throw new NullPointerException( "localAddress" );
        }
        
        Selector selector = this.selector;
        DatagramChannel ch = ( DatagramChannel ) channels.get( localAddress );
        if( selector == null || ch == null )
        {
            throw new IllegalArgumentException( "Unknown localAddress: " + localAddress );
        }
            
        SelectionKey key = ch.keyFor( selector );
        if( key == null )
        {
            throw new IllegalArgumentException( "Unknown lodalAddress: " + localAddress );
        }

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        while( it.hasNext() )
        {
            SelectionKey key = ( SelectionKey ) it.next();
            it.remove();


            DatagramChannel ch = ( DatagramChannel ) key.channel();


            RegistrationRequest req = ( RegistrationRequest ) key.attachment();
            DatagramSession session = new DatagramSession(
                    filters, ch, req.handler );
            session.setSelectionKey( key );

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        }
    }


    private void flush( DatagramSession session ) throws IOException
    {
        DatagramChannel ch = session.getChannel();


        Queue writeBufferQueue = session.getWriteBufferQueue();
        Queue writeMarkerQueue = session.getWriteMarkerQueue();


        ByteBuffer buf;
        Object marker;
        for( ;; )
        {
            synchronized( writeBufferQueue )
            {
                buf = ( ByteBuffer ) writeBufferQueue.first();
                marker = writeMarkerQueue.first();
            }


            if( buf == null )
                break;


            if( buf.remaining() == 0 )
            {
                // pop and fire event
                synchronized( writeBufferQueue )
                {
                    writeBufferQueue.pop();
                    writeMarkerQueue.pop();
                }


                try
                {
                    buf.release();
                }
                catch( IllegalStateException e )
                {
                    session.getManagerFilterChain().exceptionCaught( session, e );
                }


                session.increaseWrittenWriteRequests();
                session.getManagerFilterChain().dataWritten( session, marker );
                continue;
            }


            SelectionKey key = session.getSelectionKey();
            if( key == null )
            {
                scheduleFlush( session );
                break;
            }
            if( !key.isValid() )
            {
                continue;
            }


            int writtenBytes = ch
                    .send( buf.buf(), session.getRemoteAddress() );


            if( writtenBytes == 0 )
            {
                // Kernel buffer is full

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            }


            if( req == null )
                break;


            DatagramChannel ch = null;
            try
            {
                ch = DatagramChannel.open();
                ch.configureBlocking( false );
                ch.socket().bind( req.address );
                ch.register( selector, SelectionKey.OP_READ, req );
                channels.put( req.address, ch );
            }
            catch( Throwable t )
            {
                req.exception = t;
            }
            finally
            {
                synchronized( req )
                {
                    req.done = true;
                    req.notify();
                }


                if( ch != null && req.exception != null )
                {
                    try
                    {
                        ch.close();
                    }
                    catch( Throwable e )
                    {
                        exceptionMonitor.exceptionCaught( this, e );
                    }

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            if( request == null )
            {
                break;
            }


            DatagramChannel ch = ( DatagramChannel ) 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 );
                    key.cancel();
                    selector.wakeup(); // wake up again to trigger thread death
                    ch.close();
                }
            }
            catch( Throwable t )
            {
                exceptionMonitor.exceptionCaught( this, t );

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

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    public void test_send_LBuffer_LSocketAddress_PositonNotZero()
            throws Exception {
        // regression test for Harmony-701
        int CAPACITY_NORMAL = 256;
        int postion = 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(postion);
        int ret = dc.send(sourceBuf, localAddr1);
        // assert send (256 - 16) bytes  
        assertEquals(CAPACITY_NORMAL - postion, ret);
        // assert the position of ByteBuffer has been set
        assertEquals(CAPACITY_NORMAL, sourceBuf.position());
    }

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     * @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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     * @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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