Ralf Westphal - Design smart not hard ()

Design smart, not hard – how flow-orientation makes

software design easier

Ralf Westphal

[email protected]@ralfw

gplus.to/ralfwestphalhttp://ralfw.blogspot.com

http://geekswithblogs.net/thearchitectsnapkin

Donnerstag, 22. September 11

mailto:[email protected]












The challenge:


Let´s start spinning...


Feature slice 1


Flow-Design 1

Run Parse command line

Read lines #om file

Display lines

(args:string[]) (filename:string) (lines:string*)


Code 1 Parse command line

(args:string[]) (filename:string)


Feature slice 2


Flow-Design 2

Run Parse command line Read lines #om file

Display lines

(PageDirections)

Buffer lines

Get page #om buffer

lineBuffer:List<string>

(pageLength:int)

portal

logic

adapterapp


Code 2

Get page #om buffer


Feature slice 3


Flow-Design 3a


Display lines

Buffer lines

Get page #om buffer


Format page+

(csvLines:string*)(string*)lineBuffer:List<string>


Flow-Design 3b

Format page -

Parse lines Format table(csvLines:string*) (string*)

(records:CsvRecord*)


Code 3

Format page

Parse lines

+


Flow-Design 4


Flow-Design 4a


UI

Buffer lines

Get page #om buffer Format page

++(PageDirections)


Flow-Design 4b

Get page #om buffer -Calc index of first

line of pageGet page lines #om buffer(PageDirections) (string*)

(index:int, pageLength:int)

(pageLength:int)



Code 4


Feature slice 5


Flow-Design 5a


UI

Buffer lines


++


Flow-Design 5b

Format page -

Parse lines Format table


Normalize columns



Code 5


Feature slice 6

The challenge continues...


Flow-Design 6


UI

Buffer lines


++

Prepend line index

(string*)

(string*)


Code 6


Feature slice 7


Flow-Design 7a


UI

Buffer lines


++

Prepend line index

(pageNo:int)


Flow-Design 7b


line of pageGet page lines #om

buffer(PageDirections) (string*)

(pageLength:int) (pageNo:int)


Code 7


Feature slice 8


Flow-Design 8a


UI

Buffer lines


++

Prepend line index

(PageOfLines)


Flow-Design 8b


line of pageGet page lines #om buffer (PageOfLines)

(index:int, pageLength:int,PageInfo)


Flow-Design 8c

Format page -

Parse lines Format table

(PageOfRecords)

Normalize columns(PageOfLines)

(PageOfRecords)(string*)


Code 8


Feature slice 9

The challenge continues...


Flow-Design 9.1

Config Parse command line

Read lines #om file

UI

Format page+

Get page #om buffer

+

Prepend line index

Buffer lines

Run

Asynchronizer

background thread

foreground thread

ConcurrentList<string>


Code 9.1


Flow-Design 9.2aConfig Parse command

line Read line positions #om file

Read page lines #om file

Calc index of

Ini- Read line positions #om file Buffer lines

UI

Format page+

Get page #om buffer

+

Run

ConcurrentList<long>


Get page #om buffer -

Calc index of first line of page

Get page line positions #om buffer

(PageOfLines)

Flow-Design 9.2b


(PageOfLinePositions)

(pageLength:int)(pageNo:int)

(PageDirections)

ConcurrentList<string>


Code 9.2


Get page #om buffer -

Calc index of first line of page

Get page line positions #om buffer

Flow-Design 9.3


Format page -

Parse lines

Format tableNormalize columns

Prepend line index

(PageOfLines)(PageOfLines)


Code 9.3



Flow-Design ResourcesFlow-Design Cheat Sheetshttp://geekswithblogs.net/theArchitectsNapkin/archive/2011/03/19/flow-design-cheat-sheet-ndash-part-i-notation.aspx

http://geekswithblogs.net/theArchitectsNapkin/archive/2011/03/20/flow-design-cheat-sheet-ndash-part-ii-translation.aspx

Flow-Design Literature List (partly German)http://clean-code-advisors.com/ressourcen/flow-design-ressourcen

Flow-Design Discussion Group (feel free to start discussions in English)http://groups.google.com/group/event-based-components


http://clean-code-advisors.com/ressourcen/flow-design-ressourcen




















Ralf WestphalRalf Westphal (www.ralfw.de) is a freelance consultant, project coach, and trainer on .NET software architectural topics. He is the author of more than 450 publications since 1998 and has been awarded the Most Valued Professional badge by Microsoft each year since 2005. Together with his colleague Stefan Lieser he is the co-founder of the "Clean Code Developer" initiative to increase software quality through principles and practices (www.clean-code-developer.de).


http://www.ralfw.de

http://www.ralfw.de

http://www.clean-code-developer.de

http://www.clean-code-developer.de

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Ralf Westphal - Design smart not hard ()