[zeromq-dev] cppzmq revival and RFC on design goals and supported platforms

Thu May 24 09:40:18 CEST 2018

Some critics, hope this is ok.

It seems google is infecting anyone with it’s monolithic build philosophy.
Too sad that you decided to fetch gtest.

Going east const might feel some more enlightened than others. But now the
file has 2 styles.

I also think that pre C++ 11 Support pollutes the code. It doesn’t provide
the same interface and functionality anyway. So why care?

I appreciate your efforts and I am happy that someone takes care about
this.

But it also seems to be the right time to focus on a own adopted version of
this header.

Regards
Harald

On Thu, 24 May 2018 at 09:13, <Simon.Giesecke at btc-ag.com> wrote:

> Hi Ernest,
>
>
>
> thanks for your mail!
>
>
>
> I am not sure if I get exactly what you want to achieve by detaching.
> Maybe open an issue on github with some code sketch of how you would use
> that, and/or a PR that implements it? I am not sure what kind of “hack” you
> refer to. If it is something that could be easily misused, it might be
> better not to include it.
>
>
>
> Regarding your second question, well, the community is in charge ;) I
> personally am not working on the zguide. If you would like to improve that,
> it would be very welcome.
>
>
>
> Best wishes
>
> Simon
>
>
>
> *Von:* zeromq-dev [mailto:zeromq-dev-bounces at lists.zeromq.org] *Im
> Auftrag von *Ernest Zed
> *Gesendet:* Donnerstag, 24. Mai 2018 06:36
>
>
> *An:* ZeroMQ development list <zeromq-dev at lists.zeromq.org>
> *Betreff:* Re: [zeromq-dev] cppzmq revival and RFC on design goals and
> supported platforms
>
>
>
> Hi,
>
> It is a blessed move... so far, I'm missing few things, one of it, ability
> to detach pointer from received message and pass ownership to another
> object. I know it is not achievable by zmq, but there is a hack to
> implement it.
>
> Second, who is in charge of C++ examples? As I've reported before, the
> Paranoid Pirate example doesnt work.
>
>
>
> Sincerely,
>
> Ernest
>
>
>
> On Wed, May 23, 2018 at 10:09 PM, Gyorgy Szekely <hoditohod at gmail.com>
> wrote:
>
> Hi Simon,
>
> This is great news! We're using cppzmq in a message broker and an
> accompanying communication library for 2 years now.
>
>
>
> I fully agree with the declared goals. libzmq has a simple and concise API
> with object oriented mindset. It works well on its own, but cppzmq makes it
> a whole lot easier. What's particularly good about it:
>
> - type safety and RAII: it's very straigtforward to think in classes that
> properly clean-up resources at destruction
>
> - higher level functions: multipart messages are really nice, though the
> API is/was a bit inconsistent (socket.send(msg) vs, msg.send(socket))
>
> - header only, it's very easy to use. Header only libraries usually mean
> template heavy monsters, but fortunately not in this case
>
>
>
> What I personally really like is it's a thin wrapper and doesn't want to
> be more than libzmq. Methods usually map 1-to-1 to libzmq calls, there's no
> hidden trickery and the documentation at api.zeromq.org
> <https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fapi.zeromq.org&data=02%7C01%7Csimon.giesecke%40btc-ag.com%7C90d876b632924bc4519b08d5c12feb4f%7Cc064efb078954eebb406a40bc377bc7d%7C0%7C0%7C636627333917558531&sdata=JrTOCmytDVgVHiCOffOAv3pQ6I%2BWOJ7hVeiefD0CjQw%3D&reserved=0>
> is fully relevant.
>
>
>
> I haven't checked the recent updates (yet), but I found a few strange bits
> while working with cppzmq. Like the above mentioned sending inconsistency,
> or having to cast the socket to void* to use it in a pollset. Apart from
> that I completely agree with the direction. This is how a thin C++ wrapper
> should look like for a good base C API.
>
>
>
> BTW, we're using the lib on Ubuntu16.04 64bit / G++ 5.3, no issues so far.
>
>
>
> Regards,
>
>   Gyorgy
>
>
>
> On Wed, May 23, 2018 at 6:07 PM, <Simon.Giesecke at btc-ag.com> wrote:
>
> Hi,
>
> Pawel Kurdybacha (kurdybacha) and me (sigiesec) have recently started to
> "revive" cppzmq (https://github.com/zeromq/cppzmq
> <https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fzeromq%2Fcppzmq&data=02%7C01%7Csimon.giesecke%40btc-ag.com%7C90d876b632924bc4519b08d5c12feb4f%7Cc064efb078954eebb406a40bc377bc7d%7C0%7C0%7C636627333917558531&sdata=31MtvPSLH6oBgRyHbkUQOeRCF1hAWBbqjK%2F31hFzutk%3D&reserved=0>),
> the light-weight C++ wrapper around libzmq. We added CI for Windows/MSVC,
> Linux and MacOS, implemented tests, cleaned up the CMake infrastructure,
> formatted the source code consistently and added some overview
> documentation.
>
> If you are using cppzmq or are interested in using it, we encourage you to
> have a look at the recent changes.
>
> One particular point we would like to seek feedback on are the design
> goals, which have recently been documented for the first time. I tried to
> extrapolate them from the actual design, and from the reasons we chose to
> use cppzmq in comparison to other alternatives. These are part of the
> https://github.com/zeromq/cppzmq/blob/master/README.md
> <https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fzeromq%2Fcppzmq%2Fblob%2Fmaster%2FREADME.md&data=02%7C01%7Csimon.giesecke%40btc-ag.com%7C90d876b632924bc4519b08d5c12feb4f%7Cc064efb078954eebb406a40bc377bc7d%7C0%7C0%7C636627333917558531&sdata=JuSiHQECJNykVjawgnuhXl6%2FYl6BYiuUDp6lksqEqyc%3D&reserved=0>
> file:
>
> * cppzmq maps the libzmq C API to C++ concepts. In particular:
>    * it is type-safe (the libzmq C API exposes various class-like concepts
> as void*)
>    * it provides exception-based error handling (the libzmq C API provides
> errno-based error handling)
>    * it provides RAII-style classes that automate resource management (the
> libzmq C API requires the user to take care to free resources explicitly)
> * cppzmq is a light-weight, header-only binding. You only need to include
> the header file zmq.hpp (and maybe zmq_addon.hpp) to use it.
> * zmq.hpp is meant to contain direct mappings of the abstractions provided
> by the libzmq C API, while zmq_addon.hpp provides additional higher-level
> abstractions.
>
> We would like to here from you if you agree with these design goals. If
> you have any opposing views, proposals for improvement or extension of the
> design goals, please share them on the mailing list or by sending a PR.
>
> Another part of the README is a section on the supported platforms. Please
> review this section, in particular if you do not use MacOS, Linux or
> Windows/MSVC with a recent compiler. If you successfully use a different
> platform, please send a PR to include this in the list of "Additional
> platforms that are known to work". Support for non-C++11 compilers is
> already partial only, and might be removed completely, unless there are
> users that still require such support.
>
> Of course, you are also invited to contribute extensions, new features,
> cleanup, further tests, etc. to cppzmq.
>
> Best regards
> Simon
>
> --
> i.A. Simon Giesecke
> BTC Business Technology Consulting AG
> Kurfürstendamm 33
> 10719 Berlin
> E-Mail: Simon.Giesecke at btc-ag.com
>
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>
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