In cloud-native applications, storing sensitive information like API keys, database passwords, and access tokens in application.properties or application.yml is a security risk. To solve this, Spri
Property Binding using @ConfigurationProperties in Spring Boot
In Spring Boot, externalized configuration is one of its strongest features. Instead of hardcoding values, you can define them in property or YAML files. But injecting many @Value fields can quickl
Building Custom Starters in Spring Boot 3
Spring Boot is known for its opinionated auto-configuration and rapid setup capabilities. One of the hidden gems of its ecosystem is custom starters — reusable libraries that help you abstract co
Using CompletableFuture with Async Methods in Spring Boot
In modern application development, responsiveness and scalability are key. One way to achieve this is by leveraging asynchronous programming. In Java, CompletableFuture combined with Spring’s @As
Async Programming in Spring Boot with @Async
When you’re building responsive applications, especially REST APIs, blocking operations can slow down performance. Imagine sending emails, logging audit trails, or fetching third-party data â
Scheduling Tasks in Spring Boot with @Scheduled
Modern applications often need to perform background tasks automatically — like sending emails, cleaning logs, syncing data, or generating reports. A simple and elegant way in Scheduling Tasks in
Spring Boot Application Events and Listeners
In Spring Boot, Application Events and Listeners allow your application components to communicate in a loosely coupled, event-driven way. It’s a powerful technique for triggering actions like log
Custom Actuator Endpoints in Spring Boot 3
Spring Boot Actuator provides several out-of-the-box endpoints like /actuator/health, /metrics, and /info. But what if you need application-specific diagnostics? That’s where Custom Actuator Endp
Spring Boot Actuator Health Checks, Metrics & Monitoring
Modern applications need to be observable, monitorable, and resilient. That’s where Spring Boot Actuator shines — it exposes production-ready features like health checks, metrics, auditing, inf
Method-Level Security with @PreAuthorize and @Secured in Spring Boot
When building secure applications, it’s not just about securing endpoints—you often need to protect individual methods too. Spring Security provides powerful tools to implement method-level sec