Top 7 Java Instrumentation Projects

Byte Buddy

3 5,831 0.0 Java

Runtime code generation for the Java virtual machine.

Project mention: Monkey-patching in Java | dev.to | 2023-09-21

As seen above, the API exposes the user to low-level bytecode manipulation via byte arrays. It would be unwieldy to do it directly. Hence, real-life projects rely on bytecode manipulation libraries. ASM has been the traditional library for this, but it seems that Byte Buddy has superseded it. Note that Byte Buddy uses ASM but provides a higher-level abstraction.
JaCoCo

3 3,858 0.0 Java

:microscope: Java Code Coverage Library

Project mention: Apache Maven JaCoCo Configuration | dev.to | 2023-10-27

I will use here JaCoCo, where also the JaCoCo-Maven-lugin exists for the usage in your Maven builds. This article will show how to configure the code coverage to finally get the results for unit- and integration-tests.
Onboard AI

getonboard.dev
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brave

1 2,298 0.0 Java

Java distributed tracing implementation compatible with Zipkin backend services.

Project mention: Library For Propagating HTTP Headers | /r/Kotlin | 2023-03-28

Check https://github.com/openzipkin/brave, it works with Zipkin, but You should be able to use it with other solutions.
client_java

1 2,072 4.2 Java

Prometheus instrumentation library for JVM applications

Project mention: Prometheus JMX Exporter for Java17 | /r/PrometheusMonitoring | 2023-05-09

After doing some research it appears this class references internal packages and therefore "makes it unusable for modern Java apps" (https://github.com/prometheus/client_java/issues/533 , https://github.com/open-telemetry/opentelemetry-java/issues/4192)
java-specialagent

0 182 0.0 Java

Automatic instrumentation for 3rd-party libraries in Java applications with OpenTracing.
jplusone

0 103 0.0 Java

Tool for automatic detection and asserting "N+1 SELECT problem" occurences in JPA based Spring Boot Java applications and finding origin of JPA issued SQL statements in general
javactrl

3 26 10.0 Java

Resumable exceptions and delimited continuations for JVM

Project mention: JVM with multi-shot resumable exceptions | /r/ProgrammingLanguages | 2023-03-13
InfluxDB

www.influxdata.com
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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). The latest post mention was on 2023-10-27.