Examples of org.apache.mina.common.ByteBuffer

org.apache.mina.common.ByteBuffer
on autoExpand (it is off by default) buf.setAutoExpand( true ); buf.putString( greeting, utf8encoder ); NIO ByteBuffer is reallocated by MINA ByteBuffer behind the scene if the encoded data is larger than 16 bytes. Its capacity will increase by two times, and its limit will increase to the last position the string is written.

Derived Buffers

Derived buffers are the buffers which were created by {@link #duplicate()}, {@link #slice()}, or {@link #asReadOnlyBuffer()}. They are useful especially when you broadcast the same messages to multiple {@link IoSession}s. Please note that the derived buffers are neither pooled nor auto-expandable. Trying to expand a derived buffer will raise {@link IllegalStateException}.

Changing Buffer Allocation and Management Policy

MINA provides a {@link ByteBufferAllocator} interface to let you overridethe default buffer management behavior. There are two allocators provided out-of-the-box:
- {@link PooledByteBufferAllocator} (Default)
- {@link SimpleByteBufferAllocator}
You can change the allocator by calling {@link #setAllocator(ByteBufferAllocator)}.
@author The Apache Directory Project (mina-dev@directory.apache.org) @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (Fri, 13 Jul 2007) $ @noinspection StaticNonFinalField @see ByteBufferAllocator

     *
     * @param listener the {@code FilterListener} on which to send the data
     * @param message the data to filter and forward to the listener
     */
    void filterSend(FilterListener listener, byte[] message) {
        ByteBuffer buffer = ByteBuffer.allocate(message.length + 2, false);
        buffer.putShort((short) message.length);
        buffer.put(message);
        buffer.flip();
        // Don't worry about the listener throwing an exception, since
        // this method has no other side effects.
        listener.sendUnfiltered(buffer);
    }

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        if (logger.isLoggable(Level.FINEST)) {
            logger.log(Level.FINEST, "recv on {0}: {1}", conn, message);
        }
        
        ByteBuffer buf = (ByteBuffer) message;
        try {
            conn.getFilter().filterReceive(conn, buf);
        } catch (RuntimeException e) {
            logger.logThrow(Level.FINER, e,
                "exception in recv of {0}:", buf);

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        public ProtocolEncoder getEncoder() throws Exception {
            return new ProtocolEncoder() {
                public void encode(IoSession ioSession, Object message, ProtocolEncoderOutput out)
                    throws Exception {
                    ByteBuffer bb = ByteBuffer.allocate(9).setAutoExpand(true);
                    bb.put("Bye World".getBytes());
                    bb.flip();
                    out.write(bb);
                }


                public void dispose(IoSession ioSession) throws Exception {
                    // do nothing

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        if (codecFactory == null) {
            codecFactory = new ProtocolCodecFactory() {
                public ProtocolEncoder getEncoder() throws Exception {
                    return new ProtocolEncoder() {
                        public void encode(IoSession session, Object message, ProtocolEncoderOutput out) throws Exception {
                            ByteBuffer buf = toByteBuffer(message);
                            buf.flip();
                            out.write(buf);
                        }


                        public void dispose(IoSession session) throws Exception {
                            // do nothing

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        addCodecFactory(config, codecFactory);
    }


    protected ByteBuffer toByteBuffer(Object message) throws CharacterCodingException {
        ByteBuffer answer = null;
        try {
            answer = convertTo(ByteBuffer.class, message);
        } catch (NoTypeConversionAvailableException e) {
            String value = convertTo(String.class, message);
            answer = ByteBuffer.allocate(value.length()).setAutoExpand(true);
            answer.putString(value, encoder);
        }
        return answer;
    }

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        if( !( message instanceof Serializable ) )
        {
            throw new NotSerializableException();
        }


        ByteBuffer buf = ByteBuffer.allocate( 64 );
        buf.setAutoExpand( true );
        buf.putObject( message );
        
        int objectSize = buf.position() - 4;
        if( objectSize > maxObjectSize )
        {
            buf.release();
            throw new IllegalArgumentException( "The encoded object is too big: " + objectSize + " (> " + maxObjectSize + ')' );
        }
        
        buf.flip();
        out.write( buf );
    }

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        {
            nextFilter.messageReceived( session, message );
            return;
        }


        ByteBuffer in = ( ByteBuffer ) message;
        ProtocolDecoder decoder = getDecoder( session );
        ProtocolDecoderOutput decoderOut = getDecoderOut( session, nextFilter );
        
        try
        {
            decoder.decode( session, in, decoderOut );
        }
        catch( Throwable t )
        {
            ProtocolDecoderException pde;
            if( t instanceof ProtocolDecoderException )
            {
                pde = ( ProtocolDecoderException ) t;
            }
            else
            {
                pde = new ProtocolDecoderException( t );
            }
            pde.setHexdump( in.getHexDump() );
            throw pde;
        }
        finally
        {
            // Dispose the decoder if this session is connectionless.
            if( session.getTransportType().isConnectionless() )
            {
                disposeDecoder( session );
            }


            // Release the read buffer.
            in.release();


            decoderOut.flush();
        }
    }

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            session.close();
    }


    public void messageReceived( IoSession session, Object message )
    {
        ByteBuffer buf = ( ByteBuffer ) message;
        // Print out read buffer content.
        while( buf.hasRemaining() )
        {
            System.out.print( ( char ) buf.get() );
        }
        System.out.flush();
    }

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                throws Exception {
            if (!(message instanceof ByteBuffer)) {
                return;
            }


            ByteBuffer rb = (ByteBuffer) message;
            // Write the received data back to remote peer
            ByteBuffer wb = ByteBuffer.allocate(rb.remaining());
            wb.put(rb);
            wb.flip();
            session.write(wb);
        }

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        ProtocolEncoder encoder = new ObjectSerializationEncoder();
        encoder.encode(session, expected, out);


        Assert.assertEquals(1, out.getBufferQueue().size());
        ByteBuffer buf = out.getBufferQueue().poll();


        testDecoderAndInputStream(expected, buf);
    }

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Examples of org.apache.mina.common.ByteBuffer

Derived Buffers

Changing Buffer Allocation and Management Policy

Related Classes of org.apache.mina.common.ByteBuffer