Stefan Tilkov

In many customer engagements, I need to establish a basic set of SOA principles. The following sections introduce fundamental principles that a Service Oriented Architecture (SOA) should expose. They are not introduced as absolute truth, but rather as a frame of reference for SOA-related discussion. You'll note that the first four are based on Don Box's four tenets, although over time they may have acquired a personal spin. 1) Explicit Boundaries Everything needed by the service to provide its functionality should be passed to it when it's invoked. All access to the service should be via its publicly exposed interface; no hidden assumptions should be necessary to invoke the service. "Services are inextricably tied to messaging in that the only way into and out of a service is through messages." A service invocation should - as a general pattern - not rely on a shared... (more)