Re: [zeromq-dev] v3.1 and pre-built devices
https://github.com/zeromq/libzfl ? looks like zdevice.c was pushed to libzfl ? On Mar 11, 2012, at 3:12 PM, Jon Dyte wrote: The project moved here, but I'm not sure if it's completely up to date https://github.com/imatix/zdevices FWIW most of the devices are very simple and it's fairly easy to roll-yr-own. -- Wes claimid.com/wesyoung signature.asc Description: Message signed with OpenPGP using GPGMail ___ zeromq-dev mailing list zeromq-dev@lists.zeromq.org http://lists.zeromq.org/mailman/listinfo/zeromq-dev
[zeromq-dev] czmq and math library
libczmq is linked against math library but does not appear to use it (at least on Linux). Not sure about other platforms: Debian build warning: dh_shlibdeps dpkg-shlibdeps: warning: dependency on libm.so.6 could be avoided if debian/libczmq0/usr/lib/libczmq.so.1.0.0 were not uselessly linked against it (they use none of its symbols). dh_installdeb ___ zeromq-dev mailing list zeromq-dev@lists.zeromq.org http://lists.zeromq.org/mailman/listinfo/zeromq-dev
Re: [zeromq-dev] v3.1 and pre-built devices
On 12/03/12 16:18, Pieter Hintjens wrote: On Mon, Mar 12, 2012 at 1:25 PM, Wes Youngw...@barely3am.com wrote: https://github.com/zeromq/libzfl looks like zdevice.c was pushed to libzfl ? Yes, I moved the generic device to libzfl as an example. These two projects didn't get any traction so I abandoned them. However libzfl provides some useful stuff for real devices (such as configuration) which was missing from the minimal versions previously in the core. If anyone wants to use / improve libzfl and/or zdevices, send pull requests :-) -Pieter well for 3.1 the zmq_device function is going to need to be in either zfl or czmq as it's gone in libzmq. This is true for some of the bindings as well if they ever offered zmq_device call. pyzmq rolls it's own already. Jon ___ zeromq-dev mailing list zeromq-dev@lists.zeromq.org http://lists.zeromq.org/mailman/listinfo/zeromq-dev
Re: [zeromq-dev] v3.1 and pre-built devices
On Mon, Mar 12, 2012 at 8:15 PM, Jon Dyte j...@totient.co.uk wrote: well for 3.1 the zmq_device function is going to need to be in either zfl or czmq as it's gone in libzmq. It's really quite a simple piece of code, so reimplementing it in bindings is trivial. I'm not sure if binding technologies allow arbitrary C code to be included; that would be simplest. -Pieter ___ zeromq-dev mailing list zeromq-dev@lists.zeromq.org http://lists.zeromq.org/mailman/listinfo/zeromq-dev
Re: [zeromq-dev] v3.1 publisher filtering
3.1 works the same way as 2.1 in your example. The changes in 3.1 is that the subscription is forwarded to the PUB socket. This allows you to create a publisher device. It would sit between the parent publisher and the subscriber. The XPUB keeps track of the subscriptions and allows them to apply to the XSUB socket. This effectively filters out any messages that do not match a subscription. In your example, you are matching against a and so all messages would be passed through. You can of course use a ROUTER socket and manage the subscriptions yourself in the application (with DEALER). The main downside is that you won't be able to detect client disconnections. You may also want to consider creating an alternative PUB socket implementation in ZeroMQ. Joshua On 3/12/2012 6:48 PM, Steve wrote: I have a high level question about how a v3.1 publisher handles sending updates to subscribers. I understand that v3.1 can push the subscription filtering further towards the publisher but to what degree I'm unclear on. Here is a very simple usage example: 1) Publisher has a list of topics that are randomly updated 10 times a second. There are a total of 26 topics and each is a single lowercase alpha character representing the English alphabet (a - z). 2) Subscriber 'A' subscribes to just a topic matching a. 3) Subscriber 'B' subscribes to all topics (). In version 2.1, I believe Subscriber 'A' would receive all the messages and that the zeromq client library would filter them so the client would only see updates on 'a'. In version 3.1, is it possible to filter the messages at the publisher so that Subscriber 'A' only receives updates on topic 'a' (no filtering done on the client) and that Subscriber 'B' receives all updates on all topics (a-z)? Thanks, Steve ___ zeromq-dev mailing list zeromq-dev@lists.zeromq.org http://lists.zeromq.org/mailman/listinfo/zeromq-dev ___ zeromq-dev mailing list zeromq-dev@lists.zeromq.org http://lists.zeromq.org/mailman/listinfo/zeromq-dev
[zeromq-dev] pull-request libczmq
The following changes since commit 3bbf88fafdc332aad650210e103910aadf53d918: Merge pull request #17 from mkoppanen/master (2012-03-05 00:57:01 -0800) are available in the git repository at: git://github.com/shemminger/libczmq-changes.git master for you to fetch changes up to 83b1c00b60ecbd94f76b42433c18b20dd8e41ad8: Don't need math library (2012-03-12 12:02:35 -0700) Stephen Hemminger (1): Don't need math library c |2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/c b/c index ee5bd3c..fa8648b 100755 --- a/c +++ b/c @@ -163,7 +163,7 @@ if [ $CCNAME = gcc ]; then # If your build is failing because of missing libraries then # either you are missing development packages, or are on a non-standard/old # system and should add a special case. -STDLIBS=-lpthread -lm +STDLIBS=-lpthread # # Linux-specific subsection ___ zeromq-dev mailing list zeromq-dev@lists.zeromq.org http://lists.zeromq.org/mailman/listinfo/zeromq-dev
