https://github.com/pellse/assembler

Assembler is a reactive data aggregation library for querying and merging data from multiple data sources/services. Assembler enables efficient implementation of the API Composition Pattern and is also designed to solve the N + 1 query problem. Architecture-agnostic, it can be used as part of a monolithic or microservice architecture.

composition-api cqrs datasource event-driven event-sourcing java microservices project-reactor reactive reactive-programming reactive-streams

Last synced: 11 Jan 2026

https://github.com/pellse/decorator

A library that emulates in Java the Scala's Stackable Trait Pattern by implementing the decorator pattern at runtime through class composition instead of only through object composition.

Last synced: 12 Jan 2026