Examples of org.apache.mina.util.Queue

org.apache.mina.util.Queue
A unbounded circular queue. @author The Apache Directory Project (dev@directory.apache.org) @version $Rev: 357871 $, $Date: 2005-12-20 10:56:40 +0900 (Tue, 20 Dec 2005) $

            SocketAddress serviceAddress, SocketAddress localAddress) {
        this.wrapperManager = wrapperManager;
        this.managerDelegate = managerDelegate;
        this.filterChain = new DatagramFilterChain(this);
        this.ch = ch;
        this.writeRequestQueue = new Queue();
        this.handler = defaultHandler;
        this.remoteAddress = ch.socket().getRemoteSocketAddress();


        this.serviceAddress = serviceAddress;
        this.localAddress = localAddress;

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            }
        }
    }


    private void releaseWriteBuffers(SocketSessionImpl session) {
        Queue writeRequestQueue = session.getWriteRequestQueue();
        WriteRequest req;


        while ((req = (WriteRequest) writeRequestQueue.pop()) != null) {
            try {
                ((ByteBuffer) req.getMessage()).release();
            } catch (IllegalStateException e) {
                session.getFilterChain().fireExceptionCaught(session, e);
            } finally {

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        // Clear OP_WRITE
        SelectionKey key = session.getSelectionKey();
        key.interestOps(key.interestOps() & (~SelectionKey.OP_WRITE));


        SocketChannel ch = session.getChannel();
        Queue writeRequestQueue = session.getWriteRequestQueue();


        for (;;) {
            WriteRequest req;


            synchronized (writeRequestQueue) {
                req = (WriteRequest) writeRequestQueue.first();
            }


            if (req == null)
                break;


            ByteBuffer buf = (ByteBuffer) req.getMessage();
            if (buf.remaining() == 0) {
                synchronized (writeRequestQueue) {
                    writeRequestQueue.pop();
                }


                session.increaseWrittenMessages();


                buf.reset();

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            }


            // The normal is OP_READ and, if there are write requests in the
            // session's write queue, set OP_WRITE to trigger flushing.
            int ops = SelectionKey.OP_READ;
            Queue writeRequestQueue = session.getWriteRequestQueue();
            synchronized (writeRequestQueue) {
                if (!writeRequestQueue.isEmpty()) {
                    ops |= SelectionKey.OP_WRITE;
                }
            }


            // Now mask the preferred ops with the mask of the current session

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    {
        this.managerFilterChain = managerFilterChain;
        this.filterChain = new IoSessionFilterChain( managerFilterChain );
        this.ch = ch;
        this.config = new DatagramSessionConfig( ch );
        this.writeBufferQueue = new Queue();
        this.writeMarkerQueue = new Queue();
        this.handler = defaultHandler;
        this.remoteAddress = ch.socket().getRemoteSocketAddress();
        this.localAddress = ch.socket().getLocalSocketAddress();
    }

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    {
        this.managerFilterChain = managerFilterChain;
        this.filterChain = new IoSessionFilterChain( managerFilterChain );
        this.ch = ch;
        this.config = new SocketSessionConfig( this );
        this.writeBufferQueue = new Queue();
        this.writeMarkerQueue = new Queue();
        this.handler = defaultHandler;
        this.remoteAddress = ch.socket().getRemoteSocketAddress();
        this.localAddress = ch.socket().getLocalSocketAddress();
    }

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        }
    }
    
    private void releaseWriteBuffers( SocketSession session )
    {
        Queue writeBufferQueue = session.getWriteBufferQueue();
        session.getWriteMarkerQueue().clear();
        ByteBuffer buf;
        
        while( ( buf = (ByteBuffer) writeBufferQueue.pop() ) != null )
        {
            try
            {
                buf.release();
            }

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    private void flush( SocketSession session ) throws IOException
    {
        SocketChannel 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 )
            {
                synchronized( writeBufferQueue )
                {
                    writeBufferQueue.pop();
                    writeMarkerQueue.pop();
                }
                try
                {
                    buf.release();
                }

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


            int writtenBytes = ch.write( buf.buf() );


            SelectionKey key = session.getSelectionKey();
            if( writtenBytes == 0 )
            {
                // Kernel buffer is full
                key.interestOps( key.interestOps() | SelectionKey.OP_WRITE );
            }
            else if( writtenBytes > 0 )
            {
                key.interestOps( key.interestOps()
                                 & ( ~SelectionKey.OP_WRITE ) );


                // pop and fire event
                synchronized( writeBufferQueue )
                {
                    writeBufferQueue.pop();
                    writeMarkerQueue.pop();
                }


                session.increaseWrittenBytes( writtenBytes );
                session.getManagerFilterChain().dataWritten( session, marker );
            }

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


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


            SelectionKey key = session.getSelectionKey();
            if( writtenBytes == 0 )
            {
                // Kernel buffer is full
                key.interestOps( key.interestOps() | SelectionKey.OP_WRITE );
            }
            else if( writtenBytes > 0 )
            {
                key.interestOps( key.interestOps()
                                 & ( ~SelectionKey.OP_WRITE ) );


                // pop and fire event
                synchronized( writeBufferQueue )
                {
                    writeBufferQueue.pop();
                    writeMarkerQueue.pop();
                }


                session.increaseWrittenBytes( writtenBytes );
                session.getManagerFilterChain().dataWritten( session, marker );
            }

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