Hello.

 

I'm trying to use SimpleNetworkWrapper, according to this and some other manuals.

 

On my client side i have:

public void preInit(FMLPreInitializationEvent e) {
    	network = NetworkRegistry.INSTANCE.newSimpleChannel("test");
    	network.registerMessage(Message.FromServerHandler.class, Message.class, 0, Side.CLIENT);
    }

 

On my server side i have:

public void preInit(FMLPreInitializationEvent e) {
    	network = NetworkRegistry.INSTANCE.newSimpleChannel("test");
    	network.registerMessage(Message.FromClientHandler.class, Message.class, 0, Side.SERVER);
    }

 

Message.class:

 

package info.deseven.test.event;

import io.netty.buffer.ByteBuf;
import cpw.mods.fml.common.network.ByteBufUtils;
import cpw.mods.fml.common.network.simpleimpl.IMessage;
import cpw.mods.fml.common.network.simpleimpl.IMessageHandler;
import cpw.mods.fml.common.network.simpleimpl.MessageContext;

public class Message implements IMessage {
    
    private String text;

    public Message(String text) {
        this.text = text;
    }

    @Override
    public void fromBytes(ByteBuf buf) {
        text = ByteBufUtils.readUTF8String(buf); // this class is very useful in general for writing more complex objects
    }

    @Override
    public void toBytes(ByteBuf buf) {
        ByteBufUtils.writeUTF8String(buf, text);
    }

    public static class FromServerHandler implements IMessageHandler<Message, IMessage> {
        
        @Override
        public IMessage onMessage(Message message, MessageContext ctx) {
            System.out.println(String.format("Received %s", message.text));
            return null; // no response in this case
        }
    }
    
    public static class FromClientHandler implements IMessageHandler<Message, IMessage> {
        
        @Override
        public IMessage onMessage(Message message, MessageContext ctx) {
        	System.out.println(String.format("Received %s from %s", message.text, ctx.getServerHandler().playerEntity.getDisplayName()));;
            return null; // no response in this case
        }
    }
}

 

 

So, i'm trying to send the message to the client right after login, like that:

	public void onEvent(PlayerLoggedInEvent event) {
	System.out.println("[test] " + event.player.getDisplayName() + " connected");
	System.out.println("[test] sending 'test' to " + event.player.getDisplayName());
	ServerProxy.network.sendTo(new Message("test"), (EntityPlayerMP) event.player);
    }

 

But on the client i'm getting this:

[01:05:00] [Client thread/ERROR] [FML]: FMLIndexedMessageCodec exception caught
io.netty.handler.codec.DecoderException: java.lang.InstantiationException: info.deseven.test.event.Message

 

Can anyone help?

Oh, right...

 

Added public Message() {} to the Message.class and that's all.

 

Thank you!