In this penultimate part of my ESB or not to ESB series I’m going to cover two more architectures; API Layer and Processing Grid providing the benefits and considerations for each. Previous Posts: ESB or not to ESB – original post ESB or not to ESB revisited – Part 1. What is an ESB? ESB or not to ESB revisited – Part 2. ESB and Hub n’ Spoke Architectures An API layer (or Service Layer) provides a