The purpose of this chapter is to go beyond the business value of APIs (explained in detail in Chapter 1, The Business Value of APIs) and walk through the evolution of software architecture as a consequence of digital disruption and cloud adoption. The chapter describes in detail why and how different (middleware) technologies have evolved in order to cope with emerging requirements derived from cloud adoption and digital transformation, for example, the need to access information in real time via APIs, regardless of where data resides (for example, cloud and/or on-premise systems).
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