[zeromq-dev] Publisher side filter question

[Roy Liu]

Hi, Luke

In ZMQ 3.x, if publisher filter the message first and sent the filtered
message to the subscriber or not?
if so, publisher will save the filter options at it's side? and where to
save these options?

I want to know details about implement of "filter at publisher".

Roy.


On Thu, Aug 22, 2013 at 9:21 AM, Lucas Hope <lucas.r.hope at gmail.com> wrote:

> Hi Roy,
>
> Doesn't ZMQ 3.x do just what you want, as per the documentation you posted?
>
> What is the problem?
>
> Luke
>
>
> On Thu, Aug 22, 2013 at 10:47 AM, Roy Liu <liuchuanbo at gmail.com> wrote:
>
>> Has anyone work with this scenario?
>> Any information about the filter on the publisher side?
>>
>>
>> On Wed, Aug 21, 2013 at 10:42 PM, <liuchuanbo at gmail.com> wrote:
>>
>>> Hi, everyone
>>>
>>> In ZMQ guide http://zguide.zeromq.org/page:all, I read:
>>>
>>>
>>>    - From ØMQ v3.x, filtering happens at the publisher side when using
>>>    a connected protocol (tcp: *or ipc:*). Using the epgm:// protocol,
>>>    filtering happens at the subscriber side. In ØMQ v2.x, all filtering
>>>    happened at the subscriber side.
>>>
>>>
>>> So, I need to implement this scenario:
>>>
>>> 1. In publisher side: PUB
>>> 2. In subscriber side: SUB1, SUB2
>>> 3. PUB can send characters from A to Z.
>>>  4. SUB1 ONLY receive C character
>>>     SUB2 ONLY receive D character.
>>>
>>> How to setup PUB side filter which can send C to SUB1 and D to SUB2?
>>> This is like that a mailbox only receive his newspapers  or magazines,
>>> not receive all mails and "filter" by itself. I wander PUB side filter is
>>> that clever postman :)
>>>
>>> If filtering happens at sub side, PUB will send all the message(A-Z
>>> characters) to all the SUBs, which occupy too much network resource and be
>>> not efficient.
>>>
>>>
>>> Anyone can help?
>>>
>>> Thanks
>>>
>>> Roy.
>>>
>>
>>
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>>
>>
>
>
> --
> ---------------------------------------------------
> Dr Lucas Hope - lucas.r.hope at skype
> Machine Learning and Software Engineering Consultant
> Melbourne, Australia
>
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