RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.

Logstash - transport and process your logs, events, or other data

This repository is a fork of apache/incubator-kie-drools. Please use upstream repository for development.

Framework for Evolutionary Message-Driven Microservices on the JVM

alf.io - The open source ticket reservation system for conferences, trade shows, workshops, meetups

A distributed event bus that implements a RESTful API abstraction on top of Kafka-like queues

Powerful event-bus optimized for high throughput in multi-threaded applications. Features: Sync and Async event publication, weak/strong references, event filtering, annotation driven

Esper Complex Event Processing, Streaming SQL and Event Series Analysis

A Java event based WebSocket and HTTP server

📈 Collect customer event data from your apps. (Note that this project only includes the API collector, not the visualization platform)

An Intuitive Event-Driven Reactive Programming Library for Java

The Java microservice lib. QBit is a reactive programming lib for building microservices - JSON, HTTP, WebSocket, and REST. QBit uses reactive programming to build elastic REST, and WebSockets based cloud friendly, web services. SOA evolved for mobile and cloud. ServiceDiscovery, Health, reactive StatService, events, Java idiomatic reactive programming for

Open Replicator is a high performance MySQL binlog parser written in Java. It unfolds the possibilities that you can parse, filter and broadcast the binlog events in a real time manner.

Coin Trader is a Java-based backend for algorithmically trading cryptocurrencies. It provides data collection and export, complex event processing and triggering, and backtesting - paper trading - live trading.

Event capture and querying framework for Java

A scalable, event-driven and event-sourced Java EE application

Spring Cloud event bus

Aggregate Framework是为方便开发人员运用DDD和CQRS思想来构建复杂的、可扩展的Java企业应用系统而提供的Java技术框架。该框架提供了Aggregate、Repository、Domain Event等构建块的实现；使用DomainEvent，借助于内建的Disruptor组件，AggregateFramework可使开发人员方便的实现高性能SEDA架构。此外，该框架支持与Spring集成，提供使用 annotation的方式让开发人员方便地为Domain Event定义一个或多个事件处理, 同时可指定事件处理是同步还是异步触发，并支持分布式事务事件; 使用Spring事务管理器管理事务时，支持Unit Of Work数据访问模式以及内建一级缓存以提高访问性能，另也支持可配置的2级缓存。

A full microservice architecture with Java, Spring Cloud, Log management with ELK, Server load balancing with Nginx, Infrastructure management with Docker-compose, JMX application monitoring, JWT, Aspect OP, Distributed events with Kafka, Event Sourcing, CQRS, REST, Web Sockets, Continuous deploy with Jenkins and more