Hi Ron,
I'm far from an expert on Netty, it seems to me like that
`convertBodyTo(String.class, "UTF-8")` will lead to issues with binary
data.
What you want (I think) is
`.to("netty4:udp://host:port?allowDefaultCodec=false&useByteBuf=true")`
without `convertBodyTo`
zoran
On Fri, Nov 9, 2018 at 6:12 AM, Ron Cecchini <roncecch...@comcast.net> wrote:
>
> First, a couple of thank yous several weeks in the making:
>
> Thank you to Claus (as always) for help regarding replacing camel-rabbitmq
> with a custom class. Indeed, I only needed to do a write. So using
> 'to("bean:myBean?method=process)' worked perfectly.
>
> Thank you to Zoran for advice on Spring injection vs. Component Scan. I
> never was able to get beans in the Spring config auto-wired, so I had to do
> the manual steps of getting the Spring context, getting the bean, and then
> setting the bean where it needed to be. A bit ugly, but only a few lines of
> code. It works, so I'm leaving it alone for now.
>
> Now on to my most recent hurdle...
>
> I'm trying to write a protobuf over UDP to a server (a non-Camel app written
> in C++) expecting it serialized into a byte array.
>
> The problem is that the only write that makes it to the server seems to be
> serialized incorrectly. Conversely, when I think I've correctly serialized
> it, nothing seems to get written to the wire.
>
> The route below is the one that makes it to the server. When I do a tcpdump
> on the server's side, however, I can see that the payload is about 35-40
> bytes bigger than what the protobuf says its serialized size should be:
>
> from("direct:protobuf")
> .marshal().protobuf()
> .convertBodyTo(String.class, "UTF-8") // needed, else to(netty4:udp)
> hangs
> .to("netty4:udp://host:port?udpConnectionlessSending=true&sync=false");
>
> I immediately recognized this as probably being a "default codec" problem,
> similar to what I recently encountered when I was writing some JSON over UDP
> with netty4.
>
> So I tried the following, but nothing was written over the wire:
>
>
> .to("netty4:udp://host:port?udpConnectionlessSending=true&sync=false&allowDefaultCodec=false");
>
> I tried about a half dozen combinations: marshalling / not marshalling,
> convertBodyTo() / no convertBodyTo(), allowDefaultCode = false / true, etc.
>
> Nothing was working. And then I somehow stumbled upon 'udpByteArrayCodec' in
> the docs and thought I'd found it!
>
> However, this didn't send anything to the wire either:
>
>
> .to("netty4:udp://host:post?udpConnectionlessSending=true&sync=false&udpByteArrayCodec=true");
>
> Neither did this:
>
>
> .to("netty4:udp://host:port?udpConnectionlessSending=true&sync=false&udpByteArrayCodec=true&allowDefaultCodec=false");
>
> Only the original route resulted in *anything* being written across the wire
> for the server to see:
>
> .to("netty4:udp://host:port?udpConnectionlessSending=true&sync=false");
>
> Does anyone know what else I should try?
>
> I have never had any luck trying to install a non-default encoder/decoder,
> but in this case I don't think I even need it. I just need to serialize the
> protobuf to a byte array, and it seems that this 'udpByteArrayCodec' is
> exactly what I need. So how should I be using it? What could be preventing
> anything from appearing over the wire?
>
> Thank you so much as always!
>
> Ron
--
Zoran Regvart
