/*
* 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.activemq.artemis.core.remoting.impl.netty;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
import org.apache.activemq.artemis.utils.DataConstants;
/**
* A Netty decoder specially optimised to to decode messages on the core protocol only
*/
public class ActiveMQFrameDecoder2 extends LengthFieldBasedFrameDecoder {
public ActiveMQFrameDecoder2() {
super(Integer.MAX_VALUE, 0, DataConstants.SIZE_INT);
}
@Override
protected ByteBuf extractFrame(ChannelHandlerContext ctx, ByteBuf buffer, int index, int length) {
// This is a work around on https://github.com/netty/netty/commit/55fbf007f04fbba7bf50028f3c8b35d6c5ea5947
// Right now we need a copy when sending a message on the server otherwise messages won't be resent to the client
ByteBuf frame = ctx.alloc().buffer(length);
frame.writeBytes(buffer, index, length);
return frame.skipBytes(DataConstants.SIZE_INT);
}
}