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Brownfield Application Development in .NET by Kyle Baley, Donald Belcham

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Chapter 12. Managing external system dependencies

This chapter covers

  • Interacting with external systems effectively
  • Testing the interaction with an external system
  • Reviewing useful patterns for dealing with external systems

No application is an island. That’s true now more than ever. Today’s applications are expected to not only provide their own functionality but also pull data from a supplier’s website, transform it using a third-party library, and republish the results to both your own database as well as that of, say, the HR department.

Indeed, there are entire products, services, frameworks, and companies dedicated solely to the purpose of integrating disparate systems. As companies have grown, shrunk, and merged, their systems often ...

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