Java IoBuffer.flip方法代碼示例

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
/**
 * Dynamically sets a new delimiter. Next time 
 * {@link IoBufferDecoder#decodeOnce(IoSession, int) } will be called it will use the new 
 * delimiter. Delimiter matching is reset only if <tt>resetMatchCount</tt> is true but 
 * decoding will continue from current position.
 * 
 * NB : Delimiter {@link LineDelimiter#AUTO} is not allowed.
 * 
 * @param delim the new delimiter as a byte array
 * @param resetMatchCount delimiter matching is reset if true
 */
public void setDelimiter(byte[] delim, boolean resetMatchCount) {
    if (delim == null) {
        throw new IllegalArgumentException("Null delimiter not allowed");
    }

    // Convert delimiter to IoBuffer.
    IoBuffer delimiter = IoBuffer.allocate(delim.length);
    delimiter.put(delim);
    delimiter.flip();

    ctx.setDelimiter(delimiter);
    ctx.setContentLength(-1);
    if (resetMatchCount) {
        ctx.setMatchCount(0);
    }
}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
/***
 * Sends a msgpack message to the provider.
 * @param val msgpack encoded message
 */
private synchronized void send(Value val) {
    logger.debug("Sending packet", val);
    if (!session.isConnected())
        logger.warn("Trying to send when session is not connected.");
    Packer packer = Packer.getPacker();
    try {
        packer.packValue(val);
    } catch (IOException e) {
        throw new RuntimeException("Failed to pack value");
    }
    byte[] encodedPacket = packer.toByteArray();
    IoBuffer buffer = IoBuffer.allocate(encodedPacket.length);
    buffer.put(encodedPacket);
    buffer.flip();
    session.write(buffer);
}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
@Override
public void encode(IoSession session, Object obj, ProtocolEncoderOutput out) throws Exception {
	TcpPacket packet = (TcpPacket) obj;
	byte[] byteData = packet.getByteData();
	int len = 18 + byteData.length;
	IoBuffer buf = IoBuffer.allocate(len);
	buf.put(HEAD);
	buf.putInt(len);
	buf.putInt(packet.gettOpCode());
	buf.putInt(packet.lockedId);
	buf.putInt(packet.unlockedId);
	buf.put(byteData);
	buf.flip();
	out.write(buf);

}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
private IoBuffer encodeProperties ( final IoSession session, final Map<String, String> properties ) throws CharacterCodingException
{
    final IoBuffer data = IoBuffer.allocate ( 0 );
    data.setAutoExpand ( true );

    data.putInt ( properties.size () );

    final CharsetEncoder encoder = getCharsetEncoder ( session );

    for ( final Map.Entry<String, String> entry : properties.entrySet () )
    {
        final String key = entry.getKey ();
        final String value = entry.getValue ();

        data.putString ( key, encoder );
        data.put ( (byte)0x00 );
        data.putString ( value, encoder );
        data.put ( (byte)0x00 );
    }

    data.flip ();

    return data;
}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
@Override
public void encode ( final IoSession session, final Object message, final ProtocolEncoderOutput output ) throws Exception
{
    if ( ! ( message instanceof Frame ) )
    {
        throw new IllegalStateException ( String.format ( "Can only encode messages of type Frame but got %s", message.getClass () ) );
    }

    final Frame frame = (Frame)message;

    if ( logger.isTraceEnabled () )
    {
        logger.trace ( "Encode frame - type: {}, data: {}", frame.getType (), frame.getData () );
    }

    final IoBuffer buffer = IoBuffer.allocate ( 1 + 1 + 4 + frame.getData ().remaining () );
    buffer.put ( (byte)0x01 ); // version - #0
    buffer.put ( (byte)frame.getType ().ordinal () ); // frame type - #1
    buffer.putInt ( frame.getData ().remaining () ); // data size - #2
    buffer.put ( frame.getData () ); // data - #6
    buffer.flip ();

    output.write ( buffer );
}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
public void encode(IoSession session, Object message, ProtocolEncoderOutput out) throws Exception {
    if (!(message instanceof Serializable)) {
        throw new NotSerializableException();
    }

    IoBuffer buf = IoBuffer.allocate(64);
    buf.setAutoExpand(true);
    buf.putObject(message);

    int objectSize = buf.position() - 4;
    if (objectSize > maxObjectSize) {
        throw new IllegalArgumentException("The encoded object is too big: " + objectSize + " (> " + maxObjectSize
                + ')');
    }

    buf.flip();
    out.write(buf);
}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
private IoBuffer writeMessage(Message message) {
	//----------------消息協議格式-------------------------
	// packetLength | moduleId | cmd   |  body
	//       int       short     short    byte[]

	IoBuffer buffer = IoBuffer.allocate(CodecContext.WRITE_CAPACITY);
	buffer.setAutoExpand(true);

	//消息內容長度，先占個坑
	buffer.putInt(0);
	short moduleId = message.getModule();
	short cmd = message.getCmd();
	//寫入module類型
	buffer.putShort(moduleId);
	//寫入cmd類型
	buffer.putShort(cmd);

	//寫入具體消息的內容
	byte[] body = wrapMessageBody(moduleId, cmd, message);
	buffer.put(body);
	//回到buff字節數組頭部
	buffer.flip();
	//消息元信息，兩個short，共4個字節
	final int METE_SIZE = 4;
	//重新寫入包體長度
	buffer.putInt(buffer.limit() - METE_SIZE);
	buffer.rewind();

	return buffer;
}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
/**
 * 協議00發送消息
 * @param out
 * @param content
 * @throws IOException
 */
public static void writeFrame(IoSession session, String content)throws IOException {
	byte[] ab = content.getBytes(CHARSET_UTF8);
	IoBuffer buffer=IoBuffer.allocate(ab.length + 2);
	buffer.put((byte)0x00);
	buffer.put(ab);
	buffer.put((byte)0xFF);
	buffer.flip(); 
	session.write(buffer);
}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
@Override
public void sessionOpened ( final NextFilter nextFilter, final IoSession session ) throws Exception
{
    logger.info ( "Sending hello" );

    final byte[] data = new byte[] { //
    0x00, 0x00, //
    (byte)0xff, (byte)0xff,//
    0x00, 0x08, // plen
    0x00, 0x00, // dlen
    (byte)0xf0, 0x00, //
    0x00, 0x01, // 
    0x00, 0x01, // 
    (byte)0xFF, (byte)0xFF // our PDU 
    };

    final IoBuffer buffer = IoBuffer.allocate ( 0 ).setAutoExpand ( true );

    buffer.put ( PACKET_START_MAGIC );
    buffer.put ( (byte)0x01 ); // type

    buffer.put ( data );
    buffer.flip ();

    session.write ( new DataTPDU ( buffer ) );

    nextFilter.sessionOpened ( session );
}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
protected Object makeReadReply ( final BaseMessage baseMessage, final int[] data, final ByteOrder order )
{
    final IoBuffer reply = IoBuffer.allocate ( data.length * 2 );

    reply.order ( order );

    for ( int i = 0; i < data.length; i++ )
    {
        reply.putUnsignedShort ( data[i] );
    }
    reply.flip ();
    return new ReadResponse ( baseMessage.getTransactionId (), baseMessage.getUnitIdentifier (), baseMessage.getFunctionCode (), reply );
}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
/**
 * Creates a new instance with the specified <tt>charset</tt>
 * and the specified <tt>delimiter</tt>.
 */
public TextLineDecoder(Charset charset, LineDelimiter delimiter) {
    if (charset == null) {
        throw new IllegalArgumentException("charset parameter shuld not be null");
    }

    if (delimiter == null) {
        throw new IllegalArgumentException("delimiter parameter should not be null");
    }

    this.charset = charset;
    this.delimiter = delimiter;

    // Convert delimiter to ByteBuffer if not done yet.
    if (delimBuf == null) {
        IoBuffer tmp = IoBuffer.allocate(2).setAutoExpand(true);

        try {
            tmp.putString(delimiter.getValue(), charset.newEncoder());
        } catch (CharacterCodingException cce) {

        }

        tmp.flip();
        delimBuf = tmp;
    }
}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
@Override
public void encode ( final IoSession session, final Object message, final ProtocolEncoderOutput out ) throws Exception
{
    logger.debug ( "Encoding: {}", message );
    final Pdu request = (Pdu)message;

    final IoBuffer buffer = IoBuffer.allocate ( request.getData ().remaining () + 7 );
    buffer.setAutoExpand ( true );

    final IoBuffer pdu = request.getData ();

    // put transaction identifier
    buffer.putUnsignedShort ( request.getTransactionId () );
    // put modbus protocol identifier (always 0)
    buffer.putUnsignedShort ( 0 );
    // put length, including slave id
    buffer.putUnsignedShort ( request.getData ().remaining () + 1 );
    // put slave id
    buffer.put ( request.getUnitIdentifier () );
    // put data
    buffer.put ( pdu );

    buffer.flip ();

    logger.trace ( "Encoded to: {}", buffer );

    out.write ( buffer );
}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
protected Object makeData ( final BaseMessage message, final IoBuffer data )
{
    data.flip ();

    logger.trace ( "Create data message - data: {}", data ); //$NON-NLS-1$
    return new ReadResponse ( message.getTransactionId (), message.getUnitIdentifier (), message.getFunctionCode (), data );
}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
/**
 * Encode a SOCKS4/SOCKS4a request and writes it to the next filter
 * so it can be sent to the proxy server.
 * 
 * @param nextFilter the next filter
 * @param request the request to send.
 */
protected void writeRequest(final NextFilter nextFilter, final SocksProxyRequest request) {
    try {
        boolean isV4ARequest = Arrays.equals(request.getIpAddress(), SocksProxyConstants.FAKE_IP);
        byte[] userID = request.getUserName().getBytes("ASCII");
        byte[] host = isV4ARequest ? request.getHost().getBytes("ASCII") : null;

        int len = 9 + userID.length;

        if (isV4ARequest) {
            len += host.length + 1;
        }

        IoBuffer buf = IoBuffer.allocate(len);

        buf.put(request.getProtocolVersion());
        buf.put(request.getCommandCode());
        buf.put(request.getPort());
        buf.put(request.getIpAddress());
        buf.put(userID);
        buf.put(SocksProxyConstants.TERMINATOR);

        if (isV4ARequest) {
            buf.put(host);
            buf.put(SocksProxyConstants.TERMINATOR);
        }

        if (isV4ARequest) {
            logger.debug("  sending SOCKS4a request");
        } else {
            logger.debug("  sending SOCKS4 request");
        }

        buf.flip();
        writeData(nextFilter, buf);
    } catch (Exception ex) {
        closeSession("Unable to send Socks request: ", ex);
    }
}
 

import org.apache.mina.core.buffer.IoBuffer; //導入方法依賴的package包/類
@Override
public void filterWrite ( final NextFilter nextFilter, final IoSession session, final WriteRequest writeRequest ) throws Exception
{
    // we only handle IoBuffers
    if ( writeRequest.getMessage () instanceof IoBuffer )
    {
        final IoBuffer inData = (IoBuffer)writeRequest.getMessage ();
        final IoBuffer outData = IoBuffer.allocate ( inData.remaining () + 4 );

        // put the version, the reserved
        outData.put ( (byte)this.version );
        outData.put ( (byte)0 );

        // and the data length
        outData.putShort ( (short) ( inData.remaining () + 4 ) );

        // append the data itself
        outData.put ( inData );

        outData.flip ();

        logger.debug ( "TPKT out: {}", outData );

        // pass on data buffer
        nextFilter.filterWrite ( session, new WriteRequestWrapper ( writeRequest ) {
            @Override
            public Object getMessage ()
            {
                return outData;
            }
        } );
    }
    else
    {
        nextFilter.filterWrite ( session, writeRequest );
    }
}