I Built an Interactive Visualizer of the Spring Boot Request Lifecycle

Short summary

Interactive browser-based visualizer of Spring Boot's HTTP request lifecycle, from servlet container through filter chains, dispatchers, and handlers to the database. Shows real trace logs and illuminates error scenarios (404, 400 handling, validation short-circuits). Open-source, zero-dependency tool for understanding Spring architecture.

• •Animated visualization of complete Spring Boot request flow with live trace logging
• •Demonstrates 404 and 400 error handling, validation boundaries, and transaction lifecycle
• •Open-source, dependency-free, runs entirely in the browser

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