# belaban/JGroups

The JGroups project

Repository: https://github.com/belaban/JGroups
Canonical: https://ross.abutalabs.com/products/jgroups
Homepage: http://www.jgroups.org
Language: Java
License: Apache-2.0
License Family: permissive
Last push: 2026-08-26T13:59:59+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 5778, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_readme
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1074, forks 482 (observed 2026-08-28T04:03:28.999287+00:00)

## What it is
JGroups is a Java toolkit for reliable group communication and messaging between cluster nodes. It provides configurable protocol stacks covering transport, reliability, ordering, failure detection, encryption, and membership management.

## Use cases
- build a clustered Java application with reliable messaging
- send messages between nodes in a LAN or WAN cluster
- detect crashed nodes and get notified of membership changes
- implement reliable multicast without writing protocol code
- create a distributed cache or replicated state across nodes
- cluster task distribution across JVMs

## When to choose
- you need reliable point-to-point or point-to-multipoint messaging in Java
- you want a pluggable protocol stack you can tune per deployment
- you need group membership and failure detection out of the box

## When to avoid
- you need messaging across non-JVM languages or brokers
- you want a standalone message broker rather than an embedded library
- your app is single-node and doesn't need clustering

## Facets
- artifact type: library
- maturity: stable
- function: message-queue, networking, caching, security, compression
- domain: microservices, networking, developer-tools
- platform: jvm, cross-platform
- tags: cluster-communication, reliable-multicast, group-membership, failure-detection, protocol-stack, messaging, docker

## Member repositories
- belaban/JGroups (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:28.999287+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 2026-08-30T06:53:30.344967+00:00, confidence not recorded.
  - homepage: http://www.jgroups.org (fetched 2026-08-29T12:55:07.351133+00:00, sha e36a22f253a9)
  - site_page: http://www.jgroups.org/ug.html (fetched 2026-08-29T12:55:07.360991+00:00, sha 50184250e6bb)
- Data as of 2026-08-30T08:39:29.467469+00:00.