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Credential rotation is a security requirement that most teams either skip or handle with a restart. Neither is acceptable. Here is how to rotate database passwords, API keys, JWT secrets, and third-party credentials in a running Spring Boot application.
Read moreSpring Boot auto-configuration applies sensible defaults without requiring explicit bean definitions. Understanding the @Conditional mechanism, loading order, and override patterns turns auto-configuration from a black box into a predictable system.
Read moreSpring Boot's caching abstraction makes it easy to add caching to any method. What it doesn't tell you is when caching the wrong things causes stale data bugs, cache stampedes, and memory pressure that's harder to debug than the original performance problem.
Read moreSpring Boot's externalized configuration is powerful and easy to misuse. Getting the property precedence wrong means production uses development values. Embedding secrets in properties files is a security incident waiting to happen. Here is the complete model and the configuration structure that holds up in production.
Read moreUnstructured logs are difficult to query and impossible to alert on reliably. Structured logging with consistent correlation IDs and the right log levels transforms logs from a last resort into a first-line diagnostic tool.
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