[zeromq-dev] a more modern, Java-idiomatic jzmq/jeromq API

John Watson jkwatson at gmail.com
Tue Feb 5 18:38:56 CET 2013


Mine's *definitely* a WIP still, also. I just thought it would be good to
expose it to the light of day as early as possible.


On Tue, Feb 5, 2013 at 8:28 AM, Trevor Bernard <trevor.bernard at gmail.com>wrote:

> It's not anywhere public yet. It's a WIP.
>
> I'm beffbernard on freenode. I send you a ping
>
> On Tue, Feb 5, 2013 at 11:44 AM, John Watson <jkwatson at gmail.com> wrote:
> > I'd love to see what you've put together so far.
> >
> > If it's in github, can you point me at it?  And, yes, let's chat.  Are
> you
> > available on the irc channel? If so, let's coordinate off-list a time to
> > chat about this.
> >
> > John
> >
> >
> >
> > On Tue, Feb 5, 2013 at 6:53 AM, Trevor Bernard <trevor.bernard at gmail.com
> >
> > wrote:
> >>
> >> Awesome work John! I didn't realize you had a pull request in flight.
> >>
> >> We should have a chit chat at some point; I've also been working on a
> >> wrapper library on top of jzmq that has similar ideas.
> >>
> >> -Trev
> >>
> >> On Mon, Feb 4, 2013 at 11:31 PM, John Watson <jkwatson at gmail.com>
> wrote:
> >> > There is a pull request in effect on the jeromq project.  I'm
> >> > continually
> >> > adding to it.  The more I work on things, the more it feels like we
> need
> >> > some higher-level abstractions.
> >> >
> >> > A couple of ideas:
> >> >   1) Maybe we should ask the context to createDealer() (for example)
> and
> >> > have it return a Dealer object, with only the functionality that makes
> >> > sense
> >> > for Dealer sockets. [repeat for other socket types]
> >> >   2) So far, the jzmq project & the corresponding code in jeromq have
> >> > been
> >> > striving to be pretty close analogues to the CZMQ code.  I don't
> believe
> >> > that this is really the best way to approach things.  I propose that
> we
> >> > design a high-level, modern, java-centric API that makes it really
> easy
> >> > for
> >> > developers to get in the game.  Certainly there is much to be learned
> >> > from
> >> > the way that CZMQ was built and the facilities that it provides, but,
> at
> >> > its
> >> > core, it is a c API, not a java API.
> >> >
> >> > As I'm mostly a zeromq newb, it's going to take me a while to sort out
> >> > what
> >> > will really be the best way to go.  Those who have used zeromq via
> java
> >> > can
> >> > definitely provide a lot of value here.  When you implemented a
> >> > real-life
> >> > project that used zeromq, what wrappers, higher-level abstractions did
> >> > you
> >> > create?  That's the kind of stuff that will be invaluable.
> >> >
> >> > My goal, stated in a Pieter-style "one-liner": Make the java API
> >> > attractive
> >> > enough that Bob Lee will want to use it internally at Square for all
> >> > their
> >> > messaging needs.
> >> >
> >> > John
> >> >
> >> > ps. Bob Lee, if you're on this list, and Square is already using
> zeromq,
> >> > your experiences will definitely be invaluable!  :)
> >> >
> >> >
> >> > On Sun, Feb 3, 2013 at 12:29 PM, John Watson <jkwatson at gmail.com>
> wrote:
> >> >>
> >> >> Sounds great, Trev.  As soon as I have something roughed out, I'll
> send
> >> >> a
> >> >> pull request to the main jeromq project for perusal.
> >> >>
> >> >>
> >> >> On Sun, Feb 3, 2013 at 11:55 AM, Trevor Bernard
> >> >> <trevor.bernard at gmail.com>
> >> >> wrote:
> >> >>>
> >> >>> I am in favour of this idea as well. Also, releasing stable builds
> to
> >> >>> central would be a major plus. I'd be more than happy to donate my
> >> >>> time for this effort.
> >> >>>
> >> >>> -Trev
> >> >>>
> >> >>> On Sun, Feb 3, 2013 at 1:02 PM, John Watson <jkwatson at gmail.com>
> >> >>> wrote:
> >> >>> > On Sun, Feb 3, 2013 at 4:57 AM, Pieter Hintjens <ph at imatix.com>
> >> >>> > wrote:
> >> >>> >>
> >> >>> >> I'd encourage you to look at CZMQ and at least use some common
> >> >>> >>
> >> >>> >> terminology, if you don't map to similar classes. The key
> features
> >> >>> >> which help a lot are:
> >> >>> >>
> >> >>> >> * message = list of frames
> >> >>> >> * attached threads, connected by 'pipes'
> >> >>> >> * automatic closing of sockets when context is destroyed
> >> >>> >> * context-level linger option
> >> >>> >>
> >> >>> >> I'm also thinking of writing a class to hide zmq_poll and do that
> >> >>> >> more
> >> >>> >> neatly, e.g. manage tickless timers automatically.
> >> >>> >
> >> >>> >
> >> >>> > Excellent ideas.  I'm pretty much a zeromq newb, still working
> >> >>> > through
> >> >>> > the
> >> >>> > guide.  Initially I was quite turned off by the java APIs, which
> is
> >> >>> > why
> >> >>> > I
> >> >>> > want to make them more idiomatic.
> >> >>> >
> >> >>> > Anyone else using the java APIs (either jzmq or jeromq) who can
> >> >>> > provide
> >> >>> > me
> >> >>> > pain points from in the trenches will definitely help with the API
> >> >>> > design.
> >> >>> >
> >> >>> > My plan is to do this incrementally.  First, I'll work on
> >> >>> > "modernizing"
> >> >>> > the
> >> >>> > existing API (get rid of int flags, use Collections instead of
> >> >>> > arrays,
> >> >>> > make
> >> >>> > it more OO, etc), then, once I have a better handle on the bigger
> >> >>> > picture
> >> >>> > (and have studied CZMQ), I'll start layering higher level
> >> >>> > abstractions
> >> >>> > on
> >> >>> > top.
> >> >>> >
> >> >>> > If anyone has suggestions or ideas, please let me know.  You can
> >> >>> > also
> >> >>> > follow
> >> >>> > along on my progress in my jeromq fork on github.  I'm jkwatson
> over
> >> >>> > there.
> >> >>> >
> >> >>> > Thanks,
> >> >>> >   John
> >> >>> >
> >> >>> >
> >> >>> > _______________________________________________
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> >> >>> > zeromq-dev at lists.zeromq.org
> >> >>> > http://lists.zeromq.org/mailman/listinfo/zeromq-dev
> >> >>> >
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> >> >>
> >> >
> >> >
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