49 articles with this tag
Master Java 21 virtual threads in Spring Boot. Learn configuration, benchmarks, pitfalls, and scale from thousands to millions of concurrent operations reliably.
Stop copying code between projects. Learn how to structure Gradle multi-module projects that enforce boundaries, speed up builds, and make your codebase maintainable.
Automatically track who changed what and when with Spring Data JPA auditing. From basic timestamps to custom audit logs with complete revision history.
Reactive programming isn't always the answer. Learn when WebFlux actually helps, how it works under the hood, and how to avoid the common pitfalls.
Connect your Spring Boot app to external tools, databases, and APIs using Model Context Protocol. Complete guide with working code.
Convert unpredictable LLM text into type-safe Java objects. BeanOutputConverter, ListOutputConverter, and custom converters explained.
Complete guide to LangChain4j for Java developers. Build AI applications with RAG, memory, agents, tools, and function calling — no Python rewriting required.
Master Spring AI for production. Build Java AI applications with OpenAI, Ollama, RAG systems, and vector search with working code and best practices.
Master REST API design with industry best practices. Learn naming conventions, versioning, error handling, pagination, and security patterns.
Master the Visitor Pattern in Java with practical examples. Add new operations to object structures without modifying existing classes using double dispatch.
Master the Template Method Pattern in Java. Learn how to define the skeleton of an algorithm in a superclass but let subclasses override specific steps.
Master Java Streams for clean, efficient data processing. Map, filter, reduce, collectors, parallel streams, and real-world patterns.
Implement OAuth2 social login in Spring Boot. Learn Google, GitHub authentication, custom OAuth2 providers, and combining with JWT.
Master the Strategy Pattern in Java. Learn how to replace complex if-else logic with interchangeable algorithms and follow the Open/Closed Principle.
Master Redis caching in Spring Boot applications. Learn cache configuration, annotations, TTL management, and performance optimization techniques.
Master method-level security in Spring Boot. Learn @PreAuthorize, @PostAuthorize, SpEL expressions, custom permissions, and domain object security.
Master the State Pattern in Java. Learn how to let an object alter its behavior when its internal state changes, replacing massive switch statements.
Implement JWT authentication in Spring Boot 3. Learn Spring Security 6, token generation, validation, refresh tokens, and role-based access control.
Master Spring Boot testing with JUnit 5 and Mockito. Learn unit testing, integration testing, mocking dependencies, and test-driven development.
Master CSRF protection, CORS configuration, and security headers in Spring Boot. Learn when to disable CSRF, configure CORS properly, and add security headers.
Master the Observer Pattern in Java. Learn how to implement event-driven architectures and decouple data sources from listeners.
Build REST APIs that are consistent, discoverable, and maintainable. Naming, versioning, error handling, pagination, and HATEOAS explained.
Build production-ready microservices with Spring Boot and Spring Cloud. Learn service discovery, API gateway, config server, and inter-service communication.
Implement database authentication in Spring Security. Learn UserDetailsService, password encoding, account locking, and multi-tenant authentication.
Master the Memento Pattern in Java with practical examples. Capture and restore object state for undo/redo functionality and checkpoint-based recovery.
Master Spring Security internals. Learn FilterChain, SecurityContext, Authentication flow, and how Spring Security protects your application.
Master the Mediator Pattern in Java. Learn how to reduce coupling by having objects communicate through a mediator instead of directly.
Master Spring Data JPA with advanced queries, custom repositories, specifications, projections, and performance optimization techniques.
Master the Iterator Pattern in Java. Learn how to access elements of a collection sequentially without exposing its underlying representation.
Master Kafka message ordering with single partitions, external sequencing, idempotent producers, and time window buffering. Production patterns included.
Master the Interpreter Pattern in Java with working examples. Define grammar rules and evaluate expressions to build custom languages, DSLs, and rule engines.
Master the Command Pattern in Java. Learn how to encapsulate requests as objects to enable Undo/Redo, queuing, and macro commands.
Master the Chain of Responsibility Pattern in Java. Learn how to pass requests along a chain of handlers until one of them handles it.
Master the Proxy Pattern in Java with real-world examples. Control access to objects, implement lazy loading, caching, logging, and add security layers.
Master the Flyweight Pattern in Java with real-world examples. Learn to support thousands of objects efficiently by sharing common state across instances.
Master the Facade Pattern in Java. Learn how to hide system complexity behind a simple interface and making your libraries easier to use.
Master the Decorator Pattern in Java. Learn how to add features to objects dynamically without inheritance explosions. The ultimate 'Wrapper' pattern.
Master the Composite Pattern in Java. Learn how to treat individual objects and compositions uniformly using recursive tree structures.
Master the Bridge Pattern in Java with practical examples. Learn how to avoid class explosion by separating abstraction from implementation hierarchies.
Master the Adapter Design Pattern in Java. Learn how to integrate legacy code and 3rd-party libraries using the 'Travel Adapter' concept.
Master the Prototype Pattern in Java. Learn how to clone objects efficiently instead of creating expensive instances from scratch.
Master the Builder Pattern in Java. Learn how to construct complex objects step-by-step, avoid telescoping constructors, and write readable code.
Master the Abstract Factory Pattern in Java. Learn how to create families of related objects without specifying their concrete classes.
Master the Factory Method Pattern in Java. Learn how to loosen coupling in your code by letting subclasses decide which objects to instantiate.
Learn how to integrate Redis with Spring Boot using Spring Data Redis. Complete guide covering Docker setup, caching strategies, and practical code examples.
Learn when and why to use final classes in Java. Understand the design principle of prohibiting inheritance for better code safety.
Complete guide to Project Lombok for Java. Learn how to eliminate boilerplate code with annotations like @Data, @Builder, and @RequiredArgsConstructor.
Advanced singleton implementations including Double-Checked Locking with volatile and the Bill Pugh pattern using static inner classes.
Deep dive into the Singleton design pattern in Java. Learn different implementation approaches including eager initialization and lazy loading.