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Component Contracts in Service Oriented Systems

PRINCIPLE: Relationships must be governed by contracts that are monitored for performance. In order to build a reliable system that is composed of many services, we need to have some guidelines for making the services reliable, both in the technical sense, and in the more psychological sense of people having confidence that things will work.…

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Heroku and the Twelve Factor App: Architecting for High Velocity Web Operations

A while back I wrote that infrastructure should be delivered as code along with every web application, because web applications are not run by users, they are operated on behalf of users, and are therefore incomplete without the infrastructure needed to operate them. In that article, I mentioned Heroku, a platform-as-a-service company that makes a living operating…

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