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Re:忽然间我感到了一点困惑：设计与实践（框架） [Re:worldcreatxr]

floater

Java Jedi

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发贴: 3233
积分: 421

于 2004-09-23 22:24

This is a very good question.

The short answer is, nobody knows.

If I tell you something is right, something else is wrong. You can pick it up quickly. For example, most of jdk APIs are in this categories. It's black and white, easy to make a judgement. However, design is not as easy as this, it's kind of grey. This is where we need/build up experience. We want to make our designs as much independent of any concrete tools as possible, but we still have to build it based on something concrete. So the question is where to draw the line between these two. MDA is on the way to solve this problem, but still no there yet. This is a very hard problem because almost every design is different and thus it's hard to see the common patterns. Every design is an abstraction of something in the real world, solving this problem requires another abstraction of those design, so there are two levels of abstractions.

In my practice, I pay special attention and efforts on drawing the line between design and implementation, both at the design level and implementation level, since I found, there are some issues which exist between design and implementation levels but disappear at the design level(Lewis Ship, the tapestry guy, once noticed this too in his weblog, others noticed this much earlier).

MDA is a good starting point for this question, but is far from solving it. Experience still dominates this grey area, although there are certain rules we can follow in certain specific areas.

my 2cents

"Any fool can write code that a computer can understand. Good programmers write code that humans can understand."
- Martin Fowler, Refactoring - Improving the Design of Existing Code

话题树型展开

人气	标题	作者	字数	发贴时间
9899	忽然间我感到了一点困惑：设计与实践（框架）	worldcreatxr	90	2004-07-14 07:35
8050	Re:忽然间我感到了一点困惑：设计与实践（框架）	heaven	49	2004-07-14 11:46
8232	Re:忽然间我感到了一点困惑：设计与实践（框架）	spi_cn	174	2004-07-14 19:28
8079	Re:忽然间我感到了一点困惑：设计与实践（框架）	yolaiyoqu	52	2004-09-23 10:10
8130	Re:忽然间我感到了一点困惑：设计与实践（框架）	LuckyReport	67	2004-09-23 15:09
8687	Re:忽然间我感到了一点困惑：设计与实践（框架）	floater	1513	2004-09-23 22:24

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