[zeromq-dev] Reasonable Mechanism?

Pieter Hintjens ph at imatix.com
Thu Mar 10 12:17:35 CET 2016

The failing 'use.test' property comes from autoconf's use of calling a
method to test whether a library exists or not. You can see in
zproject/zproject_known_projects.xml how we define this for the
projects we support by default.

For your main question, I'd start with some test code (outside a
project, just for learning) that uses a ZMQ_STREAM socket to talk to
your server. When this is working, you can wrap that in an actor that
also uses a pipe to talk to the outside world. Then it uses a zpoller
to work with these two sockets at once.

There is not a lot of documentation on stream sockets, so I'd use the
test cases (libzmq/tests/*stream*.cpp) as a starting point. Also the
zmq_socket man page.


On Thu, Mar 10, 2016 at 12:19 PM, Greg Young <gregoryyoung1 at gmail.com> wrote:
> I have been playing with czmq/zactor/zproject/etc the last few days
> and have decided to do a small project to learn a bit more. Thus far I
> am reasonably comfortable with zproject and how it works.
> The project I have decided to write is a client library for EventStore
> http://github.com/eventstore/eventstore. The protocol already exists
> and there are many clients. The protocol is basically full duplex tcp
> with basic framing of protobuf serialized messages. All operations are
> async.
> One issue I am running into is I am not quite sure how to structure my
> connection actor (having dealt in actor systems before guessed I would
> have a connection actor). From looking I havn't found a reasonable way
> of building up a tcp client inside of an actor where everything is
> asynchronous eg if I use direct OS calls how do I handle both
> servicing the TCP socket and servicing my message pump on the actor?
> There are currently very limited numbers of examples up on zactor (and
> most are doing very basic things). Any help with how to structure this
> or similar examples that may exist would be helpful.
> A second small issue. I have been unable to get zproject to use any
> external libraries. When adding any library have tried both tarballs
> and repositories I always end up with an error message of "undefined
> expression use.test" from zproject_autotools.gsl:171. I don't have
> enough experience yet with zproject to be able to resolve this.
> Cheers,
> Greg
> --
> Studying for the Turing test
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