Design patterns implemented in Java

Google core libraries for Java

FizzBuzz Enterprise Edition is a no-nonsense implementation of FizzBuzz made by serious businessmen for serious business purposes.

QuestDB is an open source time-series database for fast ingest and SQL queries

Change data capture for a variety of databases. Please log issues at https://issues.redhat.com/browse/DBZ.

Open-Source Web UI for Apache Kafka Management

Test Automation Made Simple

Infinitely scalable, event-driven, language-agnostic orchestration and scheduling platform to manage millions of workflows declaratively in code.

A JavaScript checker and optimizer.

AI + Data, online. https://vespa.ai

Apache Kafka® running on Kubernetes

A reference implementation of an event-sourced system that uses PostgreSQL as an event store built with Spring Boot. Fork the repository and use it as a template for your projects. Or clone the rep…

Scalable identity resolution, entity resolution, data mastering and deduplication using ML

piper - a distributed workflow engine

Automated Repair Awesomeness for Apache Cassandra

A collection of packages describing each of the 23 design patterns