Geographically distributed systems are good candidates for publish-subscribe middleware. Here, we see how the Tokyo Metropolitan Highway Line put DDS middleware to work.
Publish-subscribe models are well suited for systems with a large number of data consumers that receive subsets or entire data sets from centralized producers. The Object Management Group has standardized the Data Distribution Service (DDS) for Real-Time Systems, with implementations offering an API that can aid designers in creating distributed systems.
