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Java java-agent

Open-source Java projects categorized as java-agent
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Java Bytecode Code Coverage Jvm Security
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Top 8 Java java-agent Projects

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  1. Byte Buddy

    Runtime code generation for the Java virtual machine.

    Project mention: Serverless applications on AWS with Lambda using Java 25, API Gateway and Aurora DSQL - Part 6 Using GraalVM Native Image | dev.to | 2026-04-22

    The biggest challenge was the fact that Hibernate uses Byte Buddy. Byte Buddy is a code generation and manipulation library for creating and modifying Java classes during the runtime of a Java application, without the help of a compiler. This obviously doesn't work at runtime in the GraalVM native image. Hibernate also ships no-op org.hibernate.bytecode.internal.none.BytecodeProviderImpl, but for many versions, it doesn't allow its configuration from outside. The Byte Buddy implementation was always found in the classpath and broke at runtime. Frameworks like Quarkus and Spring Boot can do this magic with the AOT, but as I don't use them, I was seeking the possibilities of how to solve it. Please, read my discussion in the Hibernate forum.

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  3. JaCoCo

    :microscope: Java Code Coverage Library

  4. jmx_exporter

    A process for collecting metrics using JMX MBeans for Prometheus consumption

    Project mention: Learning Fullstack Observability: Metrics | dev.to | 2026-04-06

    OpenTelemetry Java Agent: for the backend. I could have also used Spring Actuator or the JMX exporter, but the agent is simpler for this project since it emits all 3 types of telemetry signals.

  5. health-report

    Single-file program that illustrates how the JFR streaming API can be used.

  6. aegis4j

    A Java agent that disables platform features you don't use, before an attacker uses them against you.

  7. PerfUnit

    PerfUnit is Java Agent which helps to take control over applications bottlenecks, expensive calls, or simply control your performance SLO budget.

  8. jvm-hotpath

    JVM runtime execution analysis - finds hot code paths by frequency, not CPU time

    Project mention: Show HN: JVM hot-path execution analysis for Java in the age of vibe coding | news.ycombinator.com | 2026-02-17

    • Where would this save you the most time: learning a new codebase, validating AI-assisted changes, refactoring safely, or chasing weird behaviour?

    Project: https://github.com/sfkamath/jvm-hotpath

  9. jguard

    Sandbox untrusted plugins with declarative security policies - capability-based security for post-SecurityManager Java

    Project mention: JGuard v0.4.0 – Capability-based security for the JVM (post-SecurityManager) | news.ycombinator.com | 2026-05-15
NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

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Java java-agent related posts

  • JGuard v0.4.0 – Capability-based security for the JVM (post-SecurityManager)

    1 project | news.ycombinator.com | 15 May 2026

  • Serverless applications on AWS with Lambda using Java 25, API Gateway and Aurora DSQL - Part 6 Using GraalVM Native Image

    2 projects | dev.to | 22 Apr 2026

  • I Hacked the JVM to Visualize Algorithms Without Touching the Source Code

    2 projects | dev.to | 3 Apr 2026

  • Ulyp: Recording Java code execution for faster debugging (Part 1)

    2 projects | dev.to | 13 Oct 2024

  • Monkey-patching in Java

    2 projects | dev.to | 21 Sep 2023

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  • Pod log monitoring

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  • A note from our sponsor - SaaSHub
    www.saashub.com | 20 Jun 2026
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Index

What are some of the best open-source java-agent projects in Java? This list will help you:

# Project Stars
1 Byte Buddy 6,855
2 JaCoCo 4,574
3 jmx_exporter 3,307
4 health-report 118
5 aegis4j 15
6 PerfUnit 9
7 jvm-hotpath 9
8 jguard 7

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