Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 1 | package org.onlab.netty; |
| 2 | |
| 3 | import io.netty.buffer.ByteBuf; |
Madan Jampani | ddf7622 | 2014-10-04 23:48:44 -0700 | [diff] [blame] | 4 | import io.netty.channel.ChannelHandler.Sharable; |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 5 | import io.netty.channel.ChannelHandlerContext; |
| 6 | import io.netty.handler.codec.MessageToByteEncoder; |
| 7 | |
| 8 | /** |
| 9 | * Encode InternalMessage out into a byte buffer. |
| 10 | */ |
Madan Jampani | ddf7622 | 2014-10-04 23:48:44 -0700 | [diff] [blame] | 11 | @Sharable |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 12 | public class MessageEncoder extends MessageToByteEncoder<InternalMessage> { |
| 13 | |
| 14 | // onosiscool in ascii |
| 15 | public static final byte[] PREAMBLE = "onosiscool".getBytes(); |
Madan Jampani | 938aa43 | 2014-10-04 17:37:23 -0700 | [diff] [blame] | 16 | public static final int HEADER_VERSION = 1; |
| 17 | public static final int SERIALIZER_VERSION = 1; |
| 18 | |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 19 | |
Yuta HIGUCHI | 993d7aa | 2014-10-06 22:54:38 -0700 | [diff] [blame] | 20 | private final PayloadSerializer payloadSerializer; |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 21 | |
Yuta HIGUCHI | 993d7aa | 2014-10-06 22:54:38 -0700 | [diff] [blame] | 22 | public MessageEncoder(PayloadSerializer payloadSerializer) { |
| 23 | this.payloadSerializer = payloadSerializer; |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 24 | } |
| 25 | |
| 26 | @Override |
Madan Jampani | 86ed055 | 2014-10-03 16:45:42 -0700 | [diff] [blame] | 27 | protected void encode( |
| 28 | ChannelHandlerContext context, |
| 29 | InternalMessage message, |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 30 | ByteBuf out) throws Exception { |
| 31 | |
Madan Jampani | 938aa43 | 2014-10-04 17:37:23 -0700 | [diff] [blame] | 32 | // write version |
| 33 | out.writeInt(HEADER_VERSION); |
| 34 | |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 35 | // write preamble |
| 36 | out.writeBytes(PREAMBLE); |
| 37 | |
Yuta HIGUCHI | 993d7aa | 2014-10-06 22:54:38 -0700 | [diff] [blame] | 38 | byte[] payload = payloadSerializer.encode(message); |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 39 | |
Madan Jampani | 86ed055 | 2014-10-03 16:45:42 -0700 | [diff] [blame] | 40 | // write payload length |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 41 | out.writeInt(payload.length); |
| 42 | |
Yuta HIGUCHI | 993d7aa | 2014-10-06 22:54:38 -0700 | [diff] [blame] | 43 | // write payloadSerializer version |
Madan Jampani | 938aa43 | 2014-10-04 17:37:23 -0700 | [diff] [blame] | 44 | out.writeInt(SERIALIZER_VERSION); |
| 45 | |
Madan Jampani | 86ed055 | 2014-10-03 16:45:42 -0700 | [diff] [blame] | 46 | // write payload. |
Madan Jampani | ab6d311 | 2014-10-02 16:30:14 -0700 | [diff] [blame] | 47 | out.writeBytes(payload); |
| 48 | } |
| 49 | } |