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At CommerceNet Labs, we’re prototyping such a federated, Internet-scale event bus. Agents aggregate events in their areas of interest and also act as facilitators, routing selected items to other agents. An agent aggregating auto industry news, for example, might pass along items that affect the price of cars to an agent aggregating car rental industry news. That agent, in turn, might forward news affecting the price or availability of rentals to an agent aggregating travel industry news.
CommerceNet’s notification service is being built on TPd, an experimental pub-sub network infrastructure for low level events. TPd deals with nitty-gritty issues like bandwidth, latency and intermittent connections (when an agent reconnects, does it need to see all cached events on a topic, or only the most recent?).
Internet-scale pub-sub is a potentially disruptive technology because it reduces the need for big aggregators like eBay and Google. Once millions of players can directly subscribe to offers to buy and sell, they’ll invent many new business models and ways to add value. When the information you need can find you, (e.g., that your order is ready for pickup, that a new drug is available for your disease), without you having to search for it, life will be a little easier.
