Package org.refcodes.eventbus

The GenericEventBus is the (virtual) machine wide manager for event handling. It implements a publish/subscribe mechanism.

"... lately some colleagues and me were reasoning on how to do client-side (Browser, JavaScript) communication between web-page components ... decoupled ... in general I recommend taking a look at an event-bus (aka page-bus), with Java why not take a look at the refcodes-eventbus? ... the following “equation” came to mind … simply speaking, the equation Observer pattern + Publish–subscribe pattern = Message broker solves to refcodes-eventbus ..."

Lightweight message broker = event-bus?

A lightweight Message broker can be a good solution for requirements doing in-JVM (Java Virtual Machine) communication as of:

Signaling events to some event-listener … Subscribing your event-listener for some specific events … Publishing events merely to interested event-listeners … Strongly decoupling the publisher and the subscriber … Considering privacy issues (no simple broadcast) …

In the article refcodes-eventbus: Observer + Publish–subscribe = Message broker I describe the refcodes-eventbus accompanied with a plain simple example on how to use it.

The refcodes-eventbus artifact makes use of the refcodes-matcher framework for defining the criteria on when to deliver an event to an event-listener. It also sets on top of the refcodes-observer framework regarding issues around the Observer pattern ... See also ""