Skip to content
CAI
Produce a survey ↗Verify a survey

brettwooldridge/HikariCP

HikariCP is a high-performance JDBC connection pool library for Java. It manages database connections and provides extensive monitoring capabilities through integrations with Dropwizard, Micrometer, and Prometheus. The system also supports Hibernate integration and dynamic credential management.

54.3

Adequate · 6 August 2026

8.5k

lines of production code

Java

primary language

1

bus factor · 168 authors in all

4

measurements over time

CAI band scale
CAI trend line

How it got here

2013–2014 · HikariCP 5.0 refactoring and metrics

This period was dominated by the HikariCP 5.0 release, which introduced a redesigned configuration API, a new metrics tracking system, and a comprehensive refactoring of the core pool implementation. The work also included adding mock JDBC classes and OSGi integration tests to improve test coverage and reliability.

10 changes

2015–2016 · metrics integration and test coverage

This period focused on expanding HikariCP's observability by adding support for Dropwizard 5 and Prometheus metrics systems. The work included implementing new metrics trackers and health checks, alongside comprehensive unit testing to verify the correct behavior of pool states, utility classes, and monitoring integrations.

7 changes

2017–2023 · Java 11+ module support and metrics integration

This period focused on modernizing the project's build and runtime environment by adding Java 11+ module descriptor support and configuring Eclipse IDE settings. It also expanded observability by integrating Micrometer metrics and adding comprehensive tests for configuration sealing and secure logging.

5 changes

CAI lens gauges

Survey your own repository

brettwooldridge/HikariCP was measured the same way every project in this corpus was: the same rubric, at a pinned commit, with the result published in full. Point the surveyor at a repository you know and see whether you agree with it.

Survey a repository

About this page

  • The description of this project is derived from its own commit history, not from its README.
  • The score is its highest published measurement, taken on 6 August 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
  • Measured at commit a4d93f4f85 — the exact code this score is about.
  • Scored under rubric rubric-2026.08.19. Score the same commit under that rubric and you get the same number.
CAI link cards