Umesh Krishnaswamy | 345ee99 | 2012-12-13 20:29:48 -0800 | [diff] [blame] | 1 | /** |
| 2 | * Copyright 2011, Big Switch Networks, Inc. |
| 3 | * Originally created by David Erickson, Stanford University |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| 6 | * not use this file except in compliance with the License. You may obtain |
| 7 | * a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| 13 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| 14 | * License for the specific language governing permissions and limitations |
| 15 | * under the License. |
| 16 | **/ |
| 17 | |
| 18 | package net.floodlightcontroller.core.internal; |
| 19 | |
| 20 | import java.util.List; |
| 21 | |
| 22 | import org.jboss.netty.buffer.ChannelBuffer; |
| 23 | import org.jboss.netty.buffer.ChannelBuffers; |
| 24 | import org.jboss.netty.channel.Channel; |
| 25 | import org.jboss.netty.channel.ChannelHandlerContext; |
| 26 | import org.jboss.netty.handler.codec.oneone.OneToOneEncoder; |
| 27 | import org.openflow.protocol.OFMessage; |
| 28 | |
| 29 | /** |
| 30 | * Encode an openflow message for output into a ChannelBuffer, for use in a |
| 31 | * netty pipeline |
| 32 | * @author readams |
| 33 | */ |
| 34 | public class OFMessageEncoder extends OneToOneEncoder { |
| 35 | |
| 36 | @Override |
| 37 | protected Object encode(ChannelHandlerContext ctx, Channel channel, |
| 38 | Object msg) throws Exception { |
| 39 | if (!( msg instanceof List)) |
| 40 | return msg; |
| 41 | |
| 42 | @SuppressWarnings("unchecked") |
| 43 | List<OFMessage> msglist = (List<OFMessage>)msg; |
| 44 | int size = 0; |
| 45 | for (OFMessage ofm : msglist) { |
| 46 | size += ofm.getLengthU(); |
| 47 | } |
| 48 | |
| 49 | ChannelBuffer buf = ChannelBuffers.buffer(size);; |
| 50 | for (OFMessage ofm : msglist) { |
| 51 | ofm.writeTo(buf); |
| 52 | } |
| 53 | return buf; |
| 54 | } |
| 55 | |
| 56 | } |