OpenAPI and Machine-Readable API Specifications
Learn how OpenAPI turns API behavior into a reviewable contract, supports tooling, and helps teams catch breaking changes before clients encounter them.
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Synchronous Calls, Asynchronous Messaging, and Webhooks
Choose between synchronous APIs, queued messages, and webhooks by matching delivery behavior to latency needs, failure handling, and ownership boundaries.
Spring Boot Build Tools: Maven & Gradle
Configure Maven and Gradle for Spring Boot projects—plugins, dependency management, packaging JARs and WARs, and build automation essentials.
Spring Boot Roadmap
A comprehensive learning path from Spring Boot basics to production-ready microservices. Master auto-configuration, REST APIs, data access, security, testing, and deployment.
Embedded Web Servers in Spring Boot: Tomcat, Jetty, Undertow
Configure embedded servers in Spring Boot: compare Tomcat, Jetty, and Undertow, tune thread pools, enable access logs, and switch implementations.
JUnit 5 & Jupiter: Lifecycle, Nested & Parameterized Tests
Explore JUnit 5 Jupiter features: master test lifecycle annotations, organize tests with @Nested, and parameterize tests with @CsvSource and @MethodSource.
Mockito: Mocking, Stubbing, Verifications, Spy vs Mock
Learn Mockito fundamentals: create mocks and spies, stub behavior with when().thenReturn(), verify interactions, and choose between Spy vs Mock wisely.
Spring Boot Actuator: Health Checks, Metrics, Info Endpoints, Custom Indicators
Monitor Spring Boot apps with Actuator: built-in health checks, metrics, info endpoints, and how to build custom health indicators.
Spring Boot Actuator Deep Dive: Custom Metrics and Health Indicators
Deep dive into Spring Boot Actuator: expose custom metrics with Micrometer, create custom HealthIndicators, and secure actuator endpoints properly.
Spring Boot Application Structure: Layout and Component Scanning
Explore Spring Boot project structure conventions, the role of @SpringBootApplication, and how component scanning discovers beans.