On Wed, 2017-12-13 at 09:16 +0000, Chris Catherall wrote: > Hi > > We are building an application which delivers currency exchange rates > to > customers over the web. > > The exchange rates come from an existing .net WCF Duplex service. And > the > rates are streamed for a period of 60 seconds over a tcp connection. > i.e. > constantly changing data (one or two updates per second), not a > single > request/response. > > Also, different pricing is applied depending on who the customer is, > so it > is not a single source of data. It is different for each customer. > And so a > new instance of the data stream is created for each incoming request. > > We are building a new API which would sit in front of the existing > WCF > service (and behind the website backend) and we are considering using > Zero > mq to distribute the rates. > > So it is server-to-server comms. (**Not** the browser to server part) > > > > I am trying to identify if I should use a stream socket > > http://hintjens.com/blog:42
ZMQ_STREAM sockets are there to talk with plain TCP sockets, so it doesn't look like it's what you need. > Or if a simple REQ/REP pair would be fine. Or if there is some other > pattern that is more appropriate. > > > > Some things I'm struggling with: > > > > Given the data is different for each request I presume I cant have a > single > RES server. I'd need to new one up for each incoming request? How > would > that work? > > Also, how would you then co-ordinate the correct data is returned to > the > correct client? > > Could the zeroMQ part be hosted inside an existing .net Web.api ? > > > > thanks for any advice If you have one-to-one communications perhaps then PUSH-PULL is what you want. If it's one-to-many, with every receiver needing every message, then look at PUB-SUB. -- Kind regards, Luca Boccassi
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