Patterns Section Index | Page 2

ACE is the ADAPTIVE Communication Environment. It is an open-source, OO framework designed and built implementing a good number of design patterns to provide a rich, portable communication fram...more

I suggest starting with Pattern-Oriented Software Architecture: Patterns for Concurrent and Networked Objects (POSA2). POSA2 specifically brings together 17 interrelated patterns addressing Ser...more

There isn't really a "clean-cut" definition out there just yet, unlike Design Patterns. Basically, as Design Patterns (and more particularly, Process Patterns) try to codify a standard ...more

The prototype pattern is actually quite simple to implement in Java. Recall that the idea of prototype is that you are passed an object and use that object as a template to create a new object. B...more

Work on patterns has been influenced by the works of Christopher Alexander who published on topics related to urban planning and building architecture in the late 1970s. The history of patterns fo...more

Basically process patterns define a collection of best practices, techniques, methods for developing object-oriented software.A good reference site is by Scott Ambler. He also has two books on the...more

Doug Lea maintains a FAQ for the patterns-discussion mailing list.

Say you want to test this method: public Vector getEmployeeList(HttpServletRequest req) { Vector list = new Vector(); String department = req.getParameter("departmentID"); ...more

The intent of the Singleton pattern is to ensure a class has only one instance and to provide a global point of access to it. True, the second part about providing a global point of access is ent...more

The evictor pattern describes a generic procedure by which services can be deactivated, when they are no longer needed. It is described in Advanced CORBA Programming with C++. Sorry, can't help yo...more

See the list of tools at http://hillside.net/patterns/tools/. Per Lundholm recommends, “Together/J has support for Design Patterns and ships with GOF set. See http://www.togethe...more

Factory classes provide an interface for creating families of related objects. Factory classes are useful when the decision of which class to use must be done at run time and cannot be hard coded ...more

Extreme Programming has a large emphasis on the concept of refactoring: Writing code once and only once. Patterns, particularly the structural patterns mentioned by the Gang of Four, can give good...more

Analysis pattern are for domain architecture, and design pattern are for implementation mechanism for some aspect of the domain architecture. In brief, analysis pattern are more high level and mor...more

An analysis pattern is a software pattern not related to a language or implementation problem, but to a business domain, such as accounting or health care. For example, in health care, the patien...more