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[VV131] The Java Fullstack Newsletter

· java,fullstack,newsletter

🌟 Hello Fullstackers!

As we move deeper into September, big projects are no longer just ideas on the whiteboard — they’re becoming reality. It’s the season to roll up our sleeves, commit code, and face complexity head-on.

💡“The best way to get something done is to begin.”

— Walt Disney.

This week’s edition is all about digging in: pushing through the hard parts, finding flow in the middle of complexity, and remembering that every line of code, every stand-up, every merged PR is a step toward something bigger.

Inside you’ll find your usual mix of Java insights, Kubernetes practices, Kafka wisdom, teamwork inspiration, Scrum guidance, and a joke to keep it all light.

Let’s make this sprint count — one commit at a time. 🚀

#kafka

In Kafka, you want to send big files (> 1 MB). Which broker setting must you change?

  • 📥 fetch.max.bytes
  • 📦 max.partition.fetch.bytes
  • ✉️ message.max.bytes
  • 📑 log.segment.bytes

Answer: ✅ The right choice is: message.max.bytes

👉 This setting controls the largest message size the broker accepts. 👉 Increase it if you need to produce files bigger than 1 MB.

#team

SOFT SKILL: Let it go

💡 We often forgive others more easily than we forgive ourselves. But holding on to guilt, regret, or shame only adds to our emotional baggage—and keeps us from moving forward.

✨ Forgiveness isn’t about forgetting. It’s about releasing the weight that holds you back and choosing kindness toward yourself.

Discover how to let go and move on ⬇️ Make the best of tomorrow and let it go!

#mindset #selfgrowth #forgiveness

#java

Records

🚀 Goodbye boilerplate, hello clarity: Java Records

If your codebase still has “data-only” classes filled with ctors, getters, equals/hashCode, and toString, it’s time to modernize. With Records (JEP 395, Java 16+), you declare the state, and Java gives you the API:

  • ✍️ One-liner declarations for immutable data
  • 🧠 Auto-generated accessors, equals, hashCode, toString
  • ✅ Validation/normalization via canonical or compact constructors
  • 🏷️ Component annotations propagate to fields/ctors/accessors
  • 🤝 Plays beautifully with sealed hierarchies & pattern matching for switch

Tell me: what’s the first class you’ll convert to a record?

#Java #JavaRecords #JEP395 #CleanCode #Immutability #SealedClasses #PatternMatching #JavaDev #DeveloperExperience #SoftwareEngineering #CodeQuality

#agile

Using a "Technical Debt Register"

Technical debt isn’t every bug—it’s the costly design choices you keep carrying ⚖️.

Grab the playbook to identify it, track it, and reduce it sprint-by-sprint—no “hardening sprints” required 🔄.

#cloudNative

❓ How should you decide the size of microservices in a cloud-native app?

Pick one:

  1. Group by bounded context
  2. Put everything in one service
  3. One service per database table
  4. Copy the org chart

✅ Correct Answer: 1. Group by bounded context

💡 Why? Microservices follow domain-driven design. Bounded contexts help keep services focused, clear, and loosely coupled.

❌ Why the others are wrong:

  • 2. One big service → That’s a monolith, not microservices.
  • 3. One per table → Too fine-grained, adds complexity.
  • 4. Copy org chart → Conway’s Law may influence design, but it’s not the core principle.

Bounded Context by Martin Fowler: https://martinfowler.com/bliki/BoundedContext.html

#joke

So the humor is: it promises two problems, counts like a programmer (from 0), then accidentally lists three—perfectly illustrating the third problem.

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