Bazinga!
Thanks, Zoran. 'useByteBuf' was right in front of my face - right above
'udpByteArrayCodec' - and I didn't see it.
At any rate, I tried what you said - and it didn't work right away - but that
was my fault, not yours.
I first tried getting rid of the convertBodyTo(), as you mentioned. But when
that didn't work, and nothing was getting written over the wire, I went back to
trying different things to use in convertBodyTo(). And when I eventually tried
doing a convertBodyTo(ByteBuf.class), I got an exception that contained just
enough information about "caching" that made me think that maybe I shouldn't be
doing the 'getContext().setStreamCashing(true)' I've been doing by default. So
I commented that out - and it all finally worked just great.
Thank you so much again!
Ron
FWIW, here's what I did:
// getContext().setStreamCaching(true);
from("netty4:udp://host_in:port_in?networkInterface=lo&sync=false&allowDefaultCodec=false")
.unmarshal(jaxbDataFormat)
.process(new MyProcessor()) // converts POJO to protobuf and sets the
Exchange
.marshal().protobuf()
// .convertBodyTo(ByteBuf.class) // XXX: not needed, 'useByteBuf=true' works
just fine
.to("netty4:udp://host_out:port_out?udpConnectionlessSending=true&sync=false&allowDefaultCodec=false&useByteBuf=true");
> On November 9, 2018 at 4:32 AM Zoran Regvart <zo...@regvart.com> wrote:
>
>
> 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
