Event handling is one of the main means of communication inside an
application. The Observer system provides a unified mechanism just for
this purpose. You are provided with a fused event handling mechanism
with which you make your objects observable the easy way. And still it
supports your specialized listener interfaces:

You can customize it for your needs, still registration or removal of
event listeners remains unified and may be automated (important for
component architectures such as application servers).

Different strategies for event dispatching are supported as well as
pre notification for actions about to happen, by having the chance to
veto the operation.

About any system in the COMJAT.NET software firing events uses the
Observer system.

The Observer system is one of many software building blocks for the
COMJAT.NET  java application framework suite (soon to come).

The framework suite will provide java applications (Standalone,
Desktop, Peer-To-Peer, Client/Server, Utilities/Tools, SWING, etc.)
with a unified runtime environment (such as an application server).

COMJAT.NET Links:

Open source overview:
http://www.comjat.net/_main_modules/start/index.html
Log papers:  http://www.comjat.net/_main_modules/start/_systems/log/index.html
Log  download: http://www.comjat.net/_main_modules/select/index_downloads.html
Home: http://www.comjat.net