This library provides Haskell bindings to zeromq (http://zeromq.org).
Version 0.6.0 - This software currently has beta status, i.e. it had seen limited testing. This version renames "with" to "withContext" and introduces a new "withSocket" resource wrapper. The API is otherwise identical to 0.5.0
This software requires zeromq version 2.1.x.
As usual for Haskell packages this software is installed best via Cabal (http://www.haskell.org/cabal). In addition to GHC it depends on 0MQ of course.
zeromq-haskell mostly follows 0MQ's API. One difference though is that sockets
are parameterized types, i.e. there is not one socket type but when creating a
socket the desired socket type has to be specified, e.g. Pair
and the
resulting socket is of type Socket Pair
.
This additional type information is used to ensure that only options applicable
to the socket type can be set, hence ZMQ_SUBSCRIBE
and ZMQ_UNSUBSCRIBE
which
only apply to ZMQ_SUB
sockets have their own functions (subscribe
and
unsubscribe
) which can only be used with sockets of type Socket Sub
.
Other differences are mostly for convenience. Also one does not deal directly with 0MQ messages, instead these are created internally as needed.
The test folder contains some simple tests mostly mimicking the ones that come with 0MQ.
If you find any bugs or other shortcomings I would greatly appreciate a bug report, preferably via http://github.com/twittner/zeromq-haskell/issues or e-mail to [email protected]