Overview

Practical Light-4j Engineering: Architecture, Patterns, and Production-Ready Development for High-Performance Java Microservices is a hands-on, authoritative guide to building resilient, high-throughput services with the Light-4j framework. Grounded in the framework's microkernel architecture and reactive, non-blocking principles, this book explains the design decisions that enable extreme concurrency and minimal overhead, and it situates Light-4j against other Java microservice frameworks so engineers can make clear architectural choices. The book dives into Light-4j's modular ecosystem with pragmatic tutorials on dynamic module discovery, custom handler and plugin development, hot reloading, and integrating native and third-party Java libraries. You'll get comprehensive, practical guidance on configuration management-hierarchical environments, secure property injection, dynamic reloads, and validation-alongside contract-first API design, advanced routing, parameter validation, safe API evolution, documentation, and automated testing strategies for continuous delivery. Operational and security concerns are treated as first-class citizens: detailed patterns for JWT and OAuth2, fine-grained access control, secure credential handling, and transport-level protections are combined with real-world advice on non-blocking data access, reactive patterns, event-driven integration (message brokers, gRPC), performance tuning, DevOps best practices, multi-tenant and serverless deployments, and production case studies. The result is an indispensable resource for engineers and architects building production-ready, high-performance Java microservices with Light-4j.

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