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

            }
        };


        encoder.encode(session, "ABC", out);
        Assert.assertEquals(1, out.getBufferQueue().size());
        ByteBuffer buf = out.getBufferQueue().poll();
        Assert.assertEquals(5, buf.remaining());
        Assert.assertEquals('A', buf.get());
        Assert.assertEquals('B', buf.get());
        Assert.assertEquals('C', buf.get());
        Assert.assertEquals('\r', buf.get());
        Assert.assertEquals('\n', buf.get());
    }

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                LineDelimiter.WINDOWS);


        CharsetEncoder encoder = Charset.forName("UTF-8").newEncoder();
        IoSession session = new DummySession();
        TestDecoderOutput out = new TestDecoderOutput();
        ByteBuffer in = ByteBuffer.allocate(16);


        // Test one decode and one output
        in.putString("ABC\r\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(1, out.getMessageQueue().size());
        Assert.assertEquals("ABC", out.getMessageQueue().poll());


        // Test two decode and one output
        in.clear();
        in.putString("DEF", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("GHI\r\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(1, out.getMessageQueue().size());
        Assert.assertEquals("DEFGHI", out.getMessageQueue().poll());


        // Test one decode and two output
        in.clear();
        in.putString("JKL\r\nMNO\r\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(2, out.getMessageQueue().size());
        Assert.assertEquals("JKL", out.getMessageQueue().poll());
        Assert.assertEquals("MNO", out.getMessageQueue().poll());


        // Test splitted long delimiter
        decoder = new TextLineDecoder(Charset.forName("UTF-8"),
                new LineDelimiter("\n\n\n"));
        in.clear();
        in.putString("PQR\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(1, out.getMessageQueue().size());
        Assert.assertEquals("PQR", out.getMessageQueue().poll());


        // Test splitted long delimiter which produces two output
        decoder = new TextLineDecoder(Charset.forName("UTF-8"),
                new LineDelimiter("\n\n\n"));
        in.clear();
        in.putString("PQR\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("\nSTU\n\n\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(2, out.getMessageQueue().size());
        Assert.assertEquals("PQR", out.getMessageQueue().poll());
        Assert.assertEquals("STU", out.getMessageQueue().poll());


        // Test splitted long delimiter mixed with partial non-delimiter.
        decoder = new TextLineDecoder(Charset.forName("UTF-8"),
                new LineDelimiter("\n\n\n"));
        in.clear();
        in.putString("PQR\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("X\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("\n\nSTU\n\n\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(2, out.getMessageQueue().size());
        Assert.assertEquals("PQR\nX", out.getMessageQueue().poll());
        Assert.assertEquals("STU", out.getMessageQueue().poll());
    }

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                    Object message = writeRequest.getMessage();


                    int byteCount = 1;
                    Object messageCopy = message;
                    if (message instanceof ByteBuffer) {
                        ByteBuffer rb = (ByteBuffer) message;
                        rb.mark();
                        byteCount = rb.remaining();
                        ByteBuffer wb = ByteBuffer.allocate(rb.remaining());
                        wb.put(rb);
                        wb.flip();
                        rb.reset();
                        messageCopy = wb;
                    }


                    // Avoid unwanted side effect that scheduledWrite* becomes negative

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        return IOConverter.toObjectInput(toInputStream(buffer));
    }


    @Converter
    public static ByteBuffer toByteBuffer(byte[] bytes) {
        ByteBuffer buf = ByteBuffer.allocate(bytes.length);
        buf.put(bytes);
        return buf;
    }

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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 (convertLFtoCR) {
                    body = body.replace('\n', '\r');
                }


                // put the data into the byte buffer
                ByteBuffer bb = ByteBuffer.allocate(body.length() + 3).setAutoExpand(true);
                bb.put((byte) startByte);
                bb.putString(body, encoder);
                bb.put((byte) endByte1);
                bb.put((byte) endByte2);


                // flip the buffer so we can use it to write to the out stream
                bb.flip();
                if (LOG.isDebugEnabled()) {
                    LOG.debug("Encoding HL7 from " + message.getClass().getCanonicalName() + " to byte stream");
                }
                out.write(bb);
            }

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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(32).setAutoExpand(true);
                    String s = (String) message;
                    bb.put(s.getBytes());
                    bb.flip();
                    out.write(bb);
                }


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

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                LineDelimiter.AUTO);


        CharsetEncoder encoder = Charset.forName("UTF-8").newEncoder();
        IoSession session = new DummySession();
        TestDecoderOutput out = new TestDecoderOutput();
        ByteBuffer in = ByteBuffer.allocate(16);


        // Test one decode and one output
        in.putString("ABC\r\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(1, out.getMessageQueue().size());
        Assert.assertEquals("ABC", out.getMessageQueue().poll());


        // Test two decode and one output
        in.clear();
        in.putString("DEF", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("GHI\r\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(1, out.getMessageQueue().size());
        Assert.assertEquals("DEFGHI", out.getMessageQueue().poll());


        // Test one decode and two output
        in.clear();
        in.putString("JKL\r\nMNO\r\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(2, out.getMessageQueue().size());
        Assert.assertEquals("JKL", out.getMessageQueue().poll());
        Assert.assertEquals("MNO", out.getMessageQueue().poll());


        // Test multiple '\n's
        in.clear();
        in.putString("\n\n\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(3, out.getMessageQueue().size());
        Assert.assertEquals("", out.getMessageQueue().poll());
        Assert.assertEquals("", out.getMessageQueue().poll());
        Assert.assertEquals("", out.getMessageQueue().poll());


        // Test splitted long delimiter (\r\r\n)
        in.clear();
        in.putString("PQR\r", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("\r", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(1, out.getMessageQueue().size());
        Assert.assertEquals("PQR", out.getMessageQueue().poll());


        // Test splitted long delimiter (\r\r\n) which produces two output
        in.clear();
        in.putString("PQR\r", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("\r", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("\nSTU\r\r\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(2, out.getMessageQueue().size());
        Assert.assertEquals("PQR", out.getMessageQueue().poll());
        Assert.assertEquals("STU", out.getMessageQueue().poll());


        // Test splitted long delimiter mixed with partial non-delimiter.
        in.clear();
        in.putString("PQR\r", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("X\r", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(0, out.getMessageQueue().size());
        in.clear();
        in.putString("\r\nSTU\r\r\n", encoder);
        in.flip();
        decoder.decode(session, in, out);
        Assert.assertEquals(2, out.getMessageQueue().size());
        Assert.assertEquals("PQR\rX", out.getMessageQueue().poll());
        Assert.assertEquals("STU", out.getMessageQueue().poll());
    }

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    protected RouteBuilder createRouteBuilder() {
        return new RouteBuilder() {
            public void configure() {
                from("mina:udp://127.0.0.1:" + PORT + "?sync=true").process(new Processor() {
                    public void process(Exchange exchange) throws Exception {
                        ByteBuffer in = exchange.getIn().getBody(ByteBuffer.class);
                        String s = MinaConverter.toString(in, exchange);
                        exchange.getOut().setBody("Hello " + s);
                    }
                });
            }

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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