From: Jamis Buck <jgb3@...>
Date: 2004-03-23T07:09:25+09:00
Subject: [ANN] Copland 0.2.0 "Appalachian 'Spring' "

Copland 0.2.0 "Appalachian 'Spring' " is available for download!

http://rubyforge.org/projects/copland

Version 0.2.0 adds the following new features:

   1) Configuration points.  These are (more-or-less) just hashes that 
service modules may contribute values to.  Other services may then use 
these configuration points when initializing themselves.  This allows 
independent services to contribute to one anothers' initialization.

   2) Substitution Symbols. This allows you to have specially-formatted 
text symbols in your service parameters and properties, which will be 
dynamically replaced when the service is instantiated.  The values 
corresponding to the symbols are taken from a special configuration 
point, so you can easily add new symbols or replace existing symbols in 
your service modules.

   3) Multicast services.  With these you can tie multiple services 
together under one service.  Whenever a method of that top-level service 
is invoked, the corresponding methods of the contained services are 
invoked.  And since a multicast service is just another service, you can 
tie one to yet another mulitcast service, if you needed to.  You can 
also add interceptors and listeners (see following) to a multicast 
service, just as you can with normal services.

   4) Listeners.  You can register a service with another service, so 
that the first service is invoked when a particular event occurs on the 
second. Currently, the only events are registry_initialized (invoked 
when the Registry is first initialized), service_instantiated (invoked 
anytime an instance of the service is created), service_pooled (invoked 
whenever a service is returned to a pool of services), and 
service_unpooled (invoked whenever a service is removed from a pool).

   5) Class and Singleton services.  You can take any Class that has 
class methods and turn it into a service, with the class methods 
becoming the methods of the service. Same with any class that includes 
the Singleton mixin. As with any other service, you can front these 
services with interceptors, listeners, and multicasters, too. 
Transparently!

As before, it is available as gem (copland-0.2.0) or as a tar.gz (with 
included setup.rb script).  Some minor updates have been made to the 
documentation (including a justification of IoC), but much more work 
remains to be done.  Examples of the new features do not exist except in 
the unit tests.

Comments and suggestions, as always, are welcome.

-- 
Jamis Buck
jgb3@email.byu.edu
http://www.jamisbuck.org/jamis

ruby -h | ruby -e 
'a=[];readlines.join.scan(/-(.)\[e|Kk(\S*)|le.l(..)e|#!(\S*)/) {|r| a << 
r.compact.first };puts "\n>#{a.join(%q/ /)}<\n\n"'