Understanding the interface

CA.go 20170621

Transcript

1. understanding the interface CA.go - 2017-06-21 @oliverminion(sobecanada)
2. Huang Yumin Oliver @oliverminion - - at AmebaOwnd (CyberAgent, inc.) - - as Server Side Engineer (System Administorator) - - for 2+ years (golang) - - has Cooker interface
3. Agenda - - What is a Go interface ? - - Why using an interface ? - - Go interface in Ownd ! - - Where is the reflect ?
4. Go interface
5. abstract types concrete types
6. concrete types int8 int16 int32 int64 Memory Layout の 定義 Using in the Method
7. abstract types fmt.Stringer io.Reader io.Writer Behaviour(動作) の 定義 Using in the Method receiver ？
8. interface{}
9. “interface{} says nothing.” - Rob Pike in his Go Proverbs
10. Why using an interface ? Generic Algorithm Interception Point Hiding Implementation Detail
11. Why using an interface ? Generic Algorithm
12. sortable interface Sort Algorithms Interface - data が Interface の methods を 持っていれば - Sort Algorithms が使える - Sort Algorithm はdata の型に依 存しない
13. Why using an interface ? Hiding Implementation Detail
14. Hide Implementation Detail Adv. - - API から 実装を切り離せる - 実装(implementation)の追加、変更、etc が簡単に行える
15. Hide Implementation Detail Context context context.Context
16. Hide Implementation Detail Context emptyCtx cancelCtx valueCtx timerCtx
17. Why using an interface ? Interception Point
18. Interception point(s)
19. Chainning interface io.Copy *gzip.Reader *base64.Decoder *strings.Reader *os.File `44GT44KM44KSRGVjb2Rl44GX44Gf5pa544GvU3Bva2VI YW5k44Gn5oyZ5omL44GX44Gm44GP44Gg44GV44GE` “Decodeした方はSpokeHandで挙手 してください”
20. Why using an interface ? Generic Algorithm Interception Point Hiding Implementation Detail
21. Go interface in Ownd
22. contentBlock.Block
23. Block in Ownd Block block
24. Generic Algorithm Block imgBlock twitterBlock htmlBlock textBlock videoBlock
25. Hide Implementation Detail Block imgBlock htmlBlock textBlock videoBlock ? Block twitterBlock
26. Chainning interface MarshalHtml GoogleAMP imgBlock, textBlock defaultBlock(s) domain Raw Data
27. type assertions
28. type assertions
29. type assertions Concrete Type の比較!
30. type assertions better way! Abstract Type の比較!
31. type assertions type check は interfaceで; - - fmt.Stringer - json.Marshal/Unmarshal - ...
32. “The bigger the interface, the weaker the abstraction” - Rob Pike in his Go Proverbs
33. Where is the reflect ?
34. type assertions (*partially)
35. “Reflection is never clear” - Rob Pike in his Go Proverbs reflect は 次回またのご機会があります時に ... - Next Time...
36. Huang Yumin Oliver @oliverminion - - at AmebaOwnd (CyberAgent, inc.) - - as Server Side Engineer (System Administorator) - - for 2+ years (golang) - - has Cooker interface
37. ご静聴ありがとうございました Thanks CA.go - 2017-06-21 @oliverminion(sobecanada)