📰 Dev.to · Thellu
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Dev.to · Thellu
21h ago
Idempotency Keys in Spring Boot: Make POST Safe Against Retries
A user clicks “Pay”, the network drops, the client retries… and your backend creates two...
Dev.to · Thellu
2mo ago
# Stop Letting Jackson Accept Garbage: Strict JSON Parsing in Spring Boot
Most Spring Boot APIs think they are strict — until a client sends something slightly “off”, and your...
Dev.to · Thellu
3mo ago
A Boring Error Format Is a Feature: Building a Consistent Error Envelope in Spring Boot
When APIs grow, error handling usually becomes… creative: sometimes a plain message...
Dev.to · Thellu
3mo ago
`getReferenceById()` Isn’t “No-DB”: What It Really Does in JPA (and When to Use It)
If you’ve used Spring Data JPA long enough, you’ve probably seen this advice: “Use...
Dev.to · Thellu
6mo ago
How I Reduced My Oracle SQL Query Time from 110s to 1s
Recently, I ran into a performance issue while writing an Oracle SQL query. The execution time was...
Dev.to · Thellu
7mo ago
Understanding MySQL Backup Consistency: A Practical Example
This post documents the knowledge I’ve gained while learning how to perform data backups in MySQL....
Dev.to · Thellu
1y ago
Understanding Transaction rolled back because it has been marked as rollback-only in Spring
Spring transactions are powerful but sometimes tricky. Here's a real-world debugging story about a...
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