[zeromq-dev] CZMQ and Server and Client Sockets

[Doron Somech]

So I made a pull request which add polling on multiple sockets:

https://github.com/zeromq/libzmq/pull/1525

Polling on thread safe sockets is a little different then regular socket,
take a look at the gist:

https://gist.github.com/somdoron/902169bf115d3534bd24

Next is making a pull request to CZMQ to use the new ability.


On Sun, Aug 16, 2015 at 12:53 AM, Brian Knox <bknox at digitalocean.com> wrote:

> Makes sense to me!  The API is close enough to the other poller
> implementations that there's no surprises.
>
> Cheers!
> Brian
>
> On Sat, Aug 15, 2015 at 5:21 PM, Doron Somech <somdoron at gmail.com> wrote:
>
>> Polling on multiple thread safe socket is a little bit different, because
>> thread safe doesn't have a FD, so we need to create one for all thread safe
>> sockets for each thread before calling the zmq_poll.
>>
>> So I want to make it very close to the current API, this what I have so
>> far:
>>
>> https://gist.github.com/somdoron/902169bf115d3534bd24
>>
>> zmq_poller_t is actually a FD, when added to the thread safe socket the
>> socket will signal it once a command is ready, multiple sockets can use the
>> same poller. When signalled the zmq_poll will check all sockets for events.
>>
>> What do you think?
>>
>>
>>
>> On Sat, Aug 15, 2015 at 5:54 PM, Brian Knox <bknox at digitalocean.com>
>> wrote:
>>
>>> Doron - as a heads up, being able to poll multiple sockets from zpoller
>>> would be of great interest to me (I use zpoller in goczmq quite a bit).
>>>
>>> Cheers,
>>> Brian
>>>
>>> On Sat, Aug 15, 2015 at 3:48 AM, Doron Somech <somdoron at gmail.com>
>>> wrote:
>>>
>>>> Andrew are you using CZMQ? which class do you use for multiple polling,
>>>> zloop or zpoller?
>>>>
>>>> On Fri, Aug 14, 2015 at 10:36 PM, Andrew Simpson <simpsonar77 at yahoo.com
>>>> > wrote:
>>>>
>>>>> this sounds really excellent!  I am building an application that would
>>>>> greatly benefit from this over a standard Router/Dealer setup.  The only
>>>>> thing that will hold me back right now is the lack of polling on multiple
>>>>> client/server sockets.  I definitely need that.
>>>>>
>>>>> Good stuff!
>>>>>
>>>>>
>>>>>
>>>>> On Friday, August 14, 2015 9:09 AM, Doron Somech <somdoron at gmail.com>
>>>>> wrote:
>>>>>
>>>>>
>>>>>
>>>>> Hi All,
>>>>>
>>>>> I added server and client sockets support to CZMQ, you can take a look
>>>>> at the change at the following pull request:
>>>>>
>>>>> https://github.com/zeromq/czmq/pull/1059
>>>>>
>>>>> Server socket is like router socket except you don't have an identity
>>>>> frame, each message also include routing id which is an int (vs byte
>>>>> array). So each message coming from a server socket include a routing id
>>>>> which can be retrieve by calling zframe_routing_id. When sending a message
>>>>> you must set the routing id by calling zframe_set_routing_id. You can use
>>>>> zframe_send_reply with both the destination frame and the source frame
>>>>> (which include the routing id), the method copy the routing id from the
>>>>> source frame to the destination frame and then send the message.
>>>>>
>>>>> Client socket is same as dealer socket. Client and Server can only
>>>>> talk to each other.
>>>>>
>>>>> Following is a small example on how to use the new client and server
>>>>> sockets:
>>>>> https://gist.github.com/somdoron/542b74922f652d229566
>>>>>
>>>>> Client and server socket are thread safe (currently only support
>>>>> single frame messages but that might change, I think) so if your protocol
>>>>> is single frame you can use the server and client sockets from multiple
>>>>> threads.
>>>>>
>>>>> Polling on multiple client or server sockets is not supported yet.
>>>>>
>>>>> In the coming week I plan to also add zproto support and complete the
>>>>> polling on multiple sockets.
>>>>>
>>>>> Doron
>>>>>
>>>>>
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