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
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
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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.