# reactor/reactor

Reactor Bill Of Materials (tracking reactor-core, reactor-netty and more)

Repository: https://github.com/reactor/reactor
Canonical: https://ross.abutalabs.com/products/reactor
Homepage: https://projectreactor.io
License: Apache-2.0
License Family: permissive
Last push: 2026-08-24T03:42:12+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 99, longevity 100
- inputs: {"age_days": 4881, "days_push": 9, "days_rel": 9, "gap_med": 27.0, "n_releases_24m": 37}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3693, forks 485 (observed 2026-08-28T04:08:14.809555+00:00)

## What it is
The Reactor Bill of Materials (BOM) is a curated set of compatible versions for Project Reactor modules such as reactor-core, reactor-netty, reactor-extra, and reactor-pool. It is imported into Maven or Gradle builds so that all Reactor dependencies can be declared without explicit version numbers.

## Use cases
- manage consistent Reactor library versions across a Maven project
- import reactor-bom in Gradle to avoid pinning individual versions
- align reactor-core and reactor-netty versions in a Spring Boot WebFlux app
- upgrade all Project Reactor modules to a compatible release train at once
- avoid version conflicts between reactive JVM dependencies

## When to choose
- you use multiple Project Reactor modules and want guaranteed version compatibility
- you build reactive JVM applications with Spring WebFlux, RSocket, or R2DBC
- you want a single place to upgrade your reactive stack

## When to avoid
- you only need a single Reactor artifact and can pin its version directly
- your project does not use reactive or non-blocking JVM libraries
- you need the reactive libraries themselves rather than version coordination

## Facets
- artifact type: library
- maturity: stable
- function: developer-tools, concurrency, http-client, http-server, websocket, testing
- domain: developer-tools, backend, microservices, apis, performance
- platform: jvm, cross-platform
- tags: bill-of-materials, dependency-management, reactive-streams, reactor-core, reactor-netty, maven, gradle, non-blocking, backpressure, spring

## Member repositories
- reactor/reactor (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:14.809555+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:31:06.661792+00:00, confidence not recorded.
  - readme: https://github.com/reactor/reactor (fetched 2026-08-28T04:08:14.809555+00:00, sha cea678f040c8)
  - homepage: https://projectreactor.io (fetched 2026-08-29T09:25:16.266725+00:00, sha 15b8a484e2ce)
  - site_page: https://projectreactor.io/docs (fetched 2026-08-29T09:25:16.275677+00:00, sha 482fda30829b)
  - site_page: https://projectreactor.io/docs/core/release/api/reactor/core/publisher/Flux.html (fetched 2026-08-29T09:25:16.277570+00:00, sha 10fd5a2fb999)
  - site_page: https://projectreactor.io/docs/core/release/api/reactor/core/publisher/Mono.html (fetched 2026-08-29T09:25:16.280939+00:00, sha 75a6cfb770f2)
  - site_page: https://projectreactor.io/docs/core (fetched 2026-08-29T09:25:16.285062+00:00, sha 41782e9b9167)
  - site_page: https://projectreactor.io/docs/netty (fetched 2026-08-29T09:25:16.287321+00:00, sha 1b61684940bb)
- Data as of 2026-08-30T08:39:29.467469+00:00.