Product overview

J7M is Java 25 distributed-object middleware with an application hosting platform and opt-in distributed resource services. Its core abstraction is a concrete ObjectRef: a live object identity with interfaces, location information, generation and lease metadata. Applications obtain Java proxies, pass callbacks and return further references without defining a separate static endpoint for every object.

Project lineage

J7M follows j5m, the earlier middleware built for a high-capacity crawler and a virtual army. It continues that foundation as a platform for new generations of related projects delivered as distributed applications. See project history.

Use this section to decide which layers your application needs. A two-JVM service does not automatically need durable queues or a replicated state machine. A durable workflow needs more than a successful remote method call.

Question	Read
Where do applications, Nuggets and resources run?	Architecture
Which modules should I understand first?	Modules
What guarantees do the features provide?	Capabilities and boundaries
Is J7M appropriate for this application?	Evaluation checklist
What do the middleware terms mean?	Terminology

The getting-started guide introduces working code. The configuration guide explains how a host supplies discovery, transports, security and durable resources.