Netty channel.write not writing message

Question

I\'m trying to make my first steps with Netty, for this purpose I wrote simple server on Netty and simple client on oio plain TCP.

Client sends random text packet, a

Answer 1

You will see why it fails if you replace your

ctx.write("Ack"); 
ctx.flush();

in your serverHandler with the following:

ChannelFuture cf = ctx.write("Ack");
ctx.flush();
if (!cf.isSuccess()) {
    System.out.println("Send failed: " + cf.cause());
}

It should give you a message saying that String is not supported.

ByteBuf should work though:

ctx.write(Unpooled.copiedBuffer("Ack", CharsetUtil.UTF_8));
ctx.flush();

on the client side edit the channelRead method:

ByteBuf in = (ByteBuf) msg;
System.out.println("Client received: " + in.toString(CharsetUtil.UTF_8));