Chronicles of a Pragmatic Programmer

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Microservices
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Keeping Tests Valuable: Are Code Coverage Metrics Trustworthy?
When a measure becomes a target, it ceases to be a good measure. – Charles Goodhart
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Rafael Miguel
The High Cost of Rushing: Do You Want to Build a Product or Just Put Out Fires?
A good firefighter prevents the fire from spreading. A good programmer prevents the code from needing firefighters.
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Rafael Miguel
Microservices: Information Hiding
The designer must provide the intended user with all the necessary information to use the module correctly, and nothing more.
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Rafael Miguel
Hexagonal Architecture: What It Is, Why It Matters, and How It Can Save Your Code from Chaos
“I invented ‘Hexagonal Architecture’ because I was tired of firefighting…” - Alistair Cockburn 📚
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Rafael Miguel
What We Lose When We Ignore TDD?
“The true value of TDD is feedback. It tells you where you’re failing, where the design is twisted, where the code doesn’t make sense.” — Michael…
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Rafael Miguel
When Do Shared Libraries Complicate Microservices?
Shared libraries are like office printers: Everyone uses them, but no one wants to refill the paper.
Let Your Tests Do The Talking: Listen to Their Feedback!
Testing is more than just detecting errors; they are an ongoing dialogue, revealing hidden design flaws, customer misalignments, and anticipating future…
The Untold Secrets of Asynchronous Communication in Microservices
Asynchronous communication is like sending a letter through the mail. You write the letter, place it in an envelope, and send it off. Once you’ve sent…
End-to-End Testing in Microservices: Where's the Real Issue?
"The problem is not in using end-to-end tests, but in believing that they are the only strategy for quality in a microservices architecture."
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Rafael Miguel
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