[zeromq-dev] Which ZMQ Messaging Pattern to use?

[codyq0987]

Hello all,

I have an application that keeps computing stream data from T1(i.e 8:00 AM)
to T2(i.e. 10:00 AM). I want to utilize the pyzmq to serve the data to
clients by building a data service based on ZMQ.

Here is the user cases:

For example,
Case 1> if a client connects to the server @8:10 AM, the server will send
all old data before 8:10 AM and all new updates to the client. The client
will get data based on the submitted topic.

Case 2> If the client connects to the server @7:00 AM, the server simply
does nothing and will send updates to the client after 8:00AM and close the
connection @10:00AM.

Case 3> If the client connects to the server @11:00 AM, the server will
send all available data from 8:00AM-10:00AM to the client and then close
the connection.

Note: if two clients connect to the server, each of them will get the full
data starting from 8:00AM.

Based on my understanding, I cannot find any of the standard message patter
that is suitable for this purpose.

PAIR
Client/Server
Publish/Subscribe
Push/Pull

Question> In my use case, how I should implement the client/server with ZMQ
and which messaging pattern I should use?

Thank you
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