Mbassador is a very lightweight message (event) bus implementation following the publish-subscribe pattern. It is designed for ease of use and aims to be feature rich and extensible while preserving resource efficiency and performance. It offers annotation-driven configuration (and thus imposes no structural dependencies into client code), synchronous and asynchronous message delivery (configurable for each message publication and listener), weak references to registered subscribers (no memory leaks possible), message filtering based on custom filters configured via annotations, clean error handling mechanisms, very high throughput, and strong support of concurrent access.
A tool for figuring out who pays what to whom after a series of transactions among members of a group.
Software to manipulate, monitor, and manage messages in a queue of a WebSphere MQ (formally MQSeries) queue manager from a command-line or shell scripting environment.