qtrace

Qunar Tech Salon

Nov 29, 2018 · Backend Development

Java Agent Instrumentation for AOP Method Timing without Spring

This article explains how to implement Java Instrumentation using a custom Java agent to achieve AOP‑style method timing without Spring, covering Instrument concepts, Maven manifest configuration, Agent entry points, JDK Attach API loading, class file transformers, annotation processing, and integration with QTrace for full‑stack tracing.