April 2009
DDD-es Group Announced
DDD-es is a recently announced Google Group formed by José Manuel Beas with the goal of discussing and learning about Domain-Driven Design in Spanish.
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TimeAndMoney
This is a project to develop code for manipulating basic concepts in recurring domains such as time and money. The design principles followed here are explained in Part III of the book Domain-Driven Design.
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Glossary of Domain-Driven Design Terms
Excerpted from Domain-Driven Design Book
Aggregate A cluster of associated objects that are treated as a unit for the purpose of data changes. External references are restricted to one member of the AGGREGATE, designated as the root. A set of consistency rules applies within the AGGREGATE'S boundaries.
Analysis Pattern A group of concepts that represents a common construction in business modeling. It may be relevant to only one domain or may span many domains (Fowler 1997, p. 8).
Aggregate A cluster of associated objects that are treated as a unit for the purpose of data changes. External references are restricted to one member of the AGGREGATE, designated as the root. A set of consistency rules applies within the AGGREGATE'S boundaries.
Analysis Pattern A group of concepts that represents a common construction in business modeling. It may be relevant to only one domain or may span many domains (Fowler 1997, p. 8).
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- 30804 reads
Value Object
Excerpted from Domain-Driven Design Book
Definition: A Value Object is an object that describes some characteristic or attribute but carries no concept of identity.
Problem:
Tracking the identity of Entities is essential, but attaching identity to other objects can hurt system performance, add analytical work, and muddle the model by making all objects look the same.
Definition: A Value Object is an object that describes some characteristic or attribute but carries no concept of identity.
Problem:
Tracking the identity of Entities is essential, but attaching identity to other objects can hurt system performance, add analytical work, and muddle the model by making all objects look the same.
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- 9389 reads
Test-Driven Development
Test-Driven Development
TDD is a lightweight programming methodology that emphasizes fast, incremental development and especially writing tests before writing code. Ideally these follow one another in cycles measured in minutes.
TDD is a lightweight programming methodology that emphasizes fast, incremental development and especially writing tests before writing code. Ideally these follow one another in cycles measured in minutes.
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- 3389 reads
Unification
The internal consistency of a model such that each term is unambiguous and no rules contradict.
- 2627 reads
Ubiquitous Language
Excerpted from Domain-Driven Design Book
Definition: A language structured around the domain model and used by all team members to connect all the activities of the team with the software.
Problem:
A project faces serious problems when its language is fractured. Domain experts use their jargon while technical team members have their own language tuned for discussing the domain in terms of design.
Definition: A language structured around the domain model and used by all team members to connect all the activities of the team with the software.
Problem:
A project faces serious problems when its language is fractured. Domain experts use their jargon while technical team members have their own language tuned for discussing the domain in terms of design.
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- 15284 reads
Supple Design
A design that puts the power inherent in a Deep Model into the hands of a client developer to make clear, flexible expressions that give expected results robustly. Equally important, it leverages that same Deep Model to make the design itself easy for the implementer to mold and reshape to accommodate new insight.
- 3209 reads