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proto rpc libs, compatible with proto-rpc-pro

There is a newer version: 0.3.5

package net.dongliu.prettypb.rpc.coder;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;
import net.dongliu.prettypb.runtime.ExtensionRegistry;
import net.dongliu.prettypb.runtime.ProtoBufDecoder;

import java.util.List;

/**
 * Decodes a received ByteBuf into a Google Protocol Buffers Message.
 */
public class ProtobufDecoder extends MessageToMessageDecoder {

    private final Class clazz;
    private final ExtensionRegistry extensionRegistry;

    /**
     * Creates a new instance.
     */
    public ProtobufDecoder(Class clazz) {
        this(clazz, null);
    }

    public ProtobufDecoder(Class clazz, ExtensionRegistry extensionRegistry) {
        if (clazz == null) {
            throw new NullPointerException("clazz cannot be null");
        }
        this.clazz = clazz;
        this.extensionRegistry = extensionRegistry;
    }

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf msg, List