Java tutorial
/* * Copyright 2015-present Open Networking Laboratory * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.onosproject.openflow.controller.impl; import java.util.List; import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; import org.jboss.netty.buffer.ChannelBuffer; import org.jboss.netty.buffer.ChannelBuffers; import org.jboss.netty.channel.Channel; import org.jboss.netty.channel.ChannelHandlerContext; import org.jboss.netty.handler.codec.oneone.OneToOneEncoder; import org.projectfloodlight.openflow.protocol.OFMessage; /** * Encode an openflow message for output into a ChannelBuffer, for use in a * netty pipeline. */ public class OFMessageEncoder extends OneToOneEncoder { @Override protected Object encode(ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception { if (!(msg instanceof List)) { return msg; } @SuppressWarnings("unchecked") List<OFMessage> msglist = (List<OFMessage>) msg; /* XXX S can't get length of OFMessage in loxigen's openflowj?? int size = 0; for (OFMessage ofm : msglist) { size += ofm.getLengthU(); }*/ ByteBuf bb = Unpooled.buffer(); for (OFMessage ofm : msglist) { if (ofm != null) { ofm.writeTo(bb); } } ChannelBuffer buf = ChannelBuffers.wrappedBuffer(bb.nioBuffer()); return buf; } }