订阅数据馈送的多个并发用户的设计和体系结构

Here's a scenario: I have a 'data-feed' - a REST/JSON service that updates periodically (let's say - every 10 seconds or so), and if a change in the data set occurs - then all subscribed listeners need to be updated.Here's a scenario: I have a 'data-feed' - a RES