JGroups is a Java-based toolkit that enables reliable communication between multiple systems (nodes) in a distributed application. It is mostly used to create clusters in applications like distributed caching, microservices, and high-availability systems where nodes must coordinate activities, share data, or preserve state consistency.
JGroups’ Primary Goal
JGroups offers the following solutions to address the communication issue in distributed systems:
Reliable multicast messaging — Ensures that messages sent to all members of a group are delivered reliably and in the correct order, even in the case of network failures.
Group membership management — Automatically tracks which nodes are currently part of the cluster and updates the group when members join or leave.
Failure detection — Monitors nodes in the cluster and quickly identifies when a node becomes unresponsive or crashes.
Cluster-wide event notification — Broadcasts important events — like member joins, leaves, or failures — to all nodes in the cluster in real-time.
How JGroups Works
JGroups needs Java 8 or later to work, and you will also need to add the following dependency.
