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From macro to micro goto
- 1. From Macro To Micro Sam Newman ThoughtWorks
- 11. What makes a good service? #gotoaar @samnewman
- 26. "The delimited applicability of a particular model. BOUNDING CONTEXTS gives team members a clear and shared understanding of what has to be consistent and what can develop independently." #gotoaar @samnewman
- 27. A specific responsibility enforced by explicit boundaries ! http://www.sapiensworks.com/blog/post/ 2012/04/17/DDD-The-Bounded-ContextExplained.aspx #gotoaar @samnewman
- 32. Add to cart Checkout #gotoaar View Latest Releases @samnewman
- 33. Search Add to cart Checkout #gotoaar View Latest Releases @samnewman
- 34. Search Add to cart Checkout View Latest Releases Listen To Previews #gotoaar @samnewman
- 35. Checkout Add to cart Search View Latest Releases Listen To Previews #gotoaar @samnewman
- 36. Checkout Shopping Cart Add to cart Search Catalog View Latest Releases Music Library Listen To Previews #gotoaar @samnewman
- 41. That was the easy bit #gotoaar @samnewman
- 64. MusikShop System Catalog Service Finance Service Line Items #gotoaar @samnewman
- 65. MusikShop System Catalog Service Line Items #gotoaar Finance Service Ledger @samnewman
- 66. MusikShop System Catalog Service Finance Service /sku/185 Line Items #gotoaar Ledger @samnewman
- 68. MusikShopMono Finance Warehouse Catalog Country Codes Country Codes #gotoaar Country Codes @samnewman
- 75. MusikShop System Finance Service Warehouse Service Customer Service #gotoaar @samnewman
- 77. MusikShop Catalog Item #gotoaar Warehouse Bee Gees Hits | $4.99 | 45 @samnewman
- 78. MusikShop Catalog Item #gotoaar Warehouse Bee Gees Hits | $4.99 | 45 @samnewman
- 79. MusikShop Catalog Item #gotoaar Warehouse Bee Gees Hits | $4.99 | 45 @samnewman
- 90. “This is the Unix philosophy: Write programs that do one thing and do it well. Write programs to work together. Write programs to handle text streams, because that is a universal interface” - Douglas McIlroy! #gotoaar @samnewman
- 92. Rule of Modularity: Developers should build a program out of simple parts connected by well defined interfaces, so problems are local, and parts of the program can be replaced in future versions to support new features. This rule aims to save time on debugging complex code that is complex, long, and unreadable. #gotoaar @samnewman
- 93. Rule of Simplicity: Developers should design for simplicity by looking for ways to break up program systems into small, straightforward cooperating pieces. This rule aims to discourage developers’ affection for writing “intricate and beautiful complexities” that are in reality bug prone programs. #gotoaar @samnewman
- 94. Rule of Parsimony: Developers should avoid writing big programs. This rule aims to prevent overinvestment of development time in failed or suboptimal approaches caused by the owners of the program’s reluctance to throw away visibly large pieces of work. Smaller programs are not only easier to optimize and maintain; they are easier to delete when deprecated. #gotoaar @samnewman
- 96. ls | grep “Sam” #gotoaar @samnewman
- 100. 200 lines of code #gotoaar @samnewman
- 105. Basket Login Registration Recommendation - Now With Added Clojure! #gotoaar @samnewman
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- 135. Summary - Identify your bounded contexts - This is an incremental journey - you won’t get it right first time - While size is important, number of services is often the limiting factor #gotoaar Understand the cost of change - and do just enough up front thinking! @samnewman