EAI Patterns with Actor Model: Message Bus

You have a number of disparate business systems, from purchased commodity applications, to custom developed applications that help achieve competitive advantage, to those of integrating business partners. You need all of these systems to work together, although they run on different platforms and have various service interfaces, and each set of service interfaces specifies a unique data model.

Sometimes it can work best to create a Message Bus that implements a simple Service-Oriented Architecture. Such a Message Bus must unify the service interface across all integrated applications, and they must all share a common Canonical Data Model.

This example presents a stock trading system with three subsystems: Stock Trader, Portfolio Manager, and Market Analysis Tools. I create a single Actor that implements the Message Bus, the TradingBus. Each of the subsystems is given an Actor that serves as its connector: StockTrader, PortfolioManager, and MarketAnalysisTools.

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The full text is now available as part of my book Reactive Enterprise with Actor Model on Safari Books Online.

Vaughn Vernon

Vaughn Vernon

Vaughn Vernon is a Software Ecologist, Architect, Modeler. Vaughn is a leading expert in Domain-Driven Design, and a champion of simplicity and reactive systems. He consults and teaches around Domain-Driven Design and reactive software development, helping teams and organizations realize the potential of business-driven and reactive systems as they transition from technology-driven legacy web implementation approaches. As he does so, he puts strong emphasis on embracing simplicity whenever possible. Vaughn is the author of four books: Implementing Domain-Driven Design, Domain-Driven Design Distilled, Strategic Monoliths and Microservices, and Reactive Messaging Patterns with the Actor Model, all published by Addison-Wesley.

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