JLogPoint

Dynamic log points for JVM.

This project provides a simple Java agent that allows adding or removing log points at runtime via an HTTP API. It relies on Byte Buddy to instrument methods and intercept calls.

This project targets Java 17. Ensure JDK 17 or higher is available for building and running the agent.

Building

Use Maven to build the agent jar:

mvn package

The resulting jar target/jlogpoint.jar contains all dependencies and can be used as a -javaagent argument.

Usage

Start your application with the agent:

java -javaagent:path/to/jlogpoint.jar=classPattern=com.example.*,methodPattern=get.* -jar yourapp.jar

The agent instruments all classes and methods by default if no patterns are provided. Visit http://localhost:8081/ for the list of HTTP API endpoints that allow managing log points at runtime.