| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.camel.component.netty4; |
| |
| import java.util.List; |
| |
| import io.netty.buffer.ByteBuf; |
| import io.netty.buffer.ByteBufAllocator; |
| import io.netty.buffer.Unpooled; |
| import io.netty.channel.ChannelHandler; |
| import io.netty.channel.ChannelHandlerContext; |
| import io.netty.handler.codec.MessageToMessageDecoder; |
| import io.netty.handler.codec.MessageToMessageEncoder; |
| |
| public final class MyCustomCodec { |
| |
| private static ByteBuf nullDelimiter = Unpooled.wrappedBuffer(new byte[]{0}); |
| |
| private MyCustomCodec() { |
| // Helper class |
| } |
| |
| public static ChannelHandlerFactory createMyCustomDecoder() { |
| ByteBuf[] delimiters = new ByteBuf[]{nullDelimiter, nullDelimiter}; |
| return ChannelHandlerFactories.newDelimiterBasedFrameDecoder(4096, delimiters, "tcp"); |
| } |
| |
| public static ChannelHandler createMyCustomDecoder2() { |
| return new BytesDecoder(); |
| } |
| |
| public static ChannelHandler createMyCustomEncoder() { |
| return new BytesEncoder(); |
| } |
| |
| @ChannelHandler.Sharable |
| public static class BytesDecoder extends MessageToMessageDecoder<ByteBuf> { |
| |
| @Override |
| protected void decode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out) throws Exception { |
| // it may be empty, then return null |
| if (msg.isReadable()) { |
| // ByteBuf may not expose array method for accessing the under layer bytes |
| byte[] bytes = new byte[msg.readableBytes()]; |
| int readerIndex = msg.readerIndex(); |
| msg.getBytes(readerIndex, bytes); |
| out.add(bytes); |
| } |
| } |
| |
| } |
| |
| @ChannelHandler.Sharable |
| public static class BytesEncoder extends MessageToMessageEncoder<byte[]> { |
| |
| @Override |
| protected void encode(ChannelHandlerContext ctx, byte[] msg, List<Object> out) throws Exception { |
| byte[] bytes = msg; |
| ByteBuf buf = ByteBufAllocator.DEFAULT.buffer(bytes.length); |
| buf.writeBytes(bytes); |
| out.add(buf); |
| } |
| } |
| } |