Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Speaker Deck
PRO
Sign in
Sign up for free
はてなにおけるマイクロサービスとScala / Microservices and Scala at Hatena
aereal
October 08, 2016
Programming
6
33k
はてなにおけるマイクロサービスとScala / Microservices and Scala at Hatena
Scala関西Summit 2016 (
http://summit.scala-kansai.org/
) の発表資料です。
aereal
October 08, 2016
Tweet
Share
More Decks by aereal
See All by aereal
自動作曲入門 / introduction to programatic music composition
aereal
1
530k
はてなブログ タグとCDK / The epic of AWS CDK and Hatena Blog Tag
aereal
3
200k
はてなブログ タグの技術選択 / The technical details of Hatena Blog Tag
aereal
3
190k
ブログサービスのHTTPS化を支えたAWSで作るピタゴラスイッチ / The construction of large scale TLS certificates management system with AWS
aereal
2
390k
AWSではてなブログの常時HTTPS配信をバーンとやる話 / The Epic of migration from HTTP to HTTPS on Hatena Blog with AWS
aereal
14
16k
ScalaとPerlでMicroservices in production / Building microservices with Perl and Scala in production
aereal
0
4.9k
Scalaで自動作曲の練習 / A study of automatic composition in Scala
aereal
1
390k
Goで実装する軽量マークアップ言語パーサー / Gohn: parser written in Go
aereal
3
3.3k
Goで軽量マークアップ言語のパーサーを書く / Writing a parser with Go
aereal
0
980
Other Decks in Programming
See All in Programming
2023年にクル(かもしれない)通信ミドルウェア技術(仮)
s_hosoai
0
220
Remix + Cloudflare Pages + D1 で ポケモン SV のレンタルチームを検索できるアプリを作ってみた
kuroppe1819
4
1.4k
Glance App Widgetでウィジェットを作ろう / MoT TechTalk #15
mot_techtalk
0
150
What's new in Shopware 6.5
shyim
0
130
フロントエンドで学んだことをデータ分析で使ってみた話
daichi_igarashi
0
190
和暦を正しく扱うための暦の話
nagise
10
6.7k
CPU/GPU高速化セミナー 浮動小数点から文字列への高速変換の論文を読んでみた / cpugpu acceleration seminar 20230201
fixstars
0
110
ポケモンで学ぶiOS 16弾丸ツアー 🚅
giginet
PRO
1
620
AWSとCPUのムフフな関係
cmdemura
0
480
T3 Stack and TypeScript ecosystem
quramy
3
810
Git Rebase
bkuhlmann
10
1.2k
良質な技術記事を量産する秘訣 / #MeetsPro
jnchito
16
4.9k
Featured
See All Featured
Building Your Own Lightsaber
phodgson
96
4.9k
Reflections from 52 weeks, 52 projects
jeffersonlam
339
18k
Unsuck your backbone
ammeep
659
56k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
109
16k
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
38
3.6k
Designing for Performance
lara
600
65k
Rebuilding a faster, lazier Slack
samanthasiow
69
7.6k
The Mythical Team-Month
searls
210
40k
Testing 201, or: Great Expectations
jmmastey
25
5.7k
Building Applications with DynamoDB
mza
85
5k
Writing Fast Ruby
sferik
613
58k
Become a Pro
speakerdeck
PRO
6
3.2k
Transcript
ͯͳʹ͓͚Δ ϚΠΫϩαʔϏεͱScala id:aereal
ࣗݾհ • id:aereal • גࣜձࣾͯͳ (2012ʙ) • ͯͳϒοΫϚʔΫ • ͯͳϒϩά
• Perl, Ruby, Scala, Shell Script
ΞδΣϯμ • ৽ (ϚΠΫϩ) αʔϏεʹ͍ͭͯ • ͳͥϚΠΫϩαʔϏε͔ • ͳͥScala͔ •
DDDͷ࣮ફ
DISCLAIMER • ։ൃதͷ༰ؚ͕·Ε·͢ • ࣮ࡍͷϦϦʔε࣌ʹมߋ͞Ε͍ͯΔՄೳੑ͋Γ
৽αʔϏεʹ͍ͭͯ
http://hatenablog.com/
“ͯͳϒϩάΛͬͱຊ֨తʹ͍͍ͨํͷͨ Ίʹɺ༗ྉϓϥϯʮͯͳϒϩάProʯΛ༻ҙ͠ ͓ͯΓ·͢ɻࠂͷඇදࣔಠࣗυϝΠϯػೳ ͳͲɺͯͳϒϩάΛΑΓศརʹ͓͍͍ͨͩ ͚·͢ɻ” http://hatenablog.com/guide/pro
ͯͳϙΠϯτ ΫϨδοτΧʔυ ίϯϏχৼࠐ ۜߦৼࠐ ༻ https://www.hatena.ne.jp/shop/point/list
http://hatena.g.hatena.ne.jp/hatena/20150529/1432869070
վम or ࡞Γ͠ • طଘͷγεςϜϞϊϦγοΫ • ܾࡁͯͯ͠ͳϙΠϯτΛνϟʔδ͢Δ • ͯͳϙΠϯτΛͬͯߪೖ͢Δ •
༷Λཧ͢Δ͍͍ػձͰ͋Δ
ܾࡁߦαʔϏε (֎෦) ͯͳͷαʔϏε (ϒοΫϚʔΫͳͲ) ݱߦܾࡁγεςϜ ϙΠϯτཧ ڞ༗Ϟδϡʔϧ ༗ྉϓϥϯཧ ґଘ ͯͳͷαʔϏε
ґଘ ͯͳͷαʔϏε ґଘ etc. ΞΧϯτ
ݱߦܾࡁγεςϜͷߏ • ܾࡁγεςϜ: WebΞϓϦέʔγϣϯ • APIͳ͘HTMLͷϑΥʔϜ͕͋ΔͷΈ • ڞ༗Ϟδϡʔϧ: ܾࡁߦαʔϏεͱ௨৴͢Δ࣮ •
ͨ͘͞ΜͷϦϙδτϦ͔Βґଘ͞Ε͍ͯΔ • ڞ༗DBΛૢ࡞͢Δ
ݱߦܾࡁγεςϜͷվम • ΄ͱΜͲݱ࣮తͰͳ͍ • ޓੑʹؔ͢ΔεΩʔϜ͕ͳ͍ • શޙํޓ or die •
ෳͷυϝΠϯ͕ೖΓཚΕ͍ͯΔ • ݱࡏͷ༷ʹӨڹΛڧ͘ड͚Δ • վળ͕·ΘΒͳ͍
ϑϧεΫϥον
৽ܾࡁγεςϜ • ܾࡁߦαʔϏεͷήʔτΣΠͱͯ͠ಇ͘ • ͯͳϒϩάProͷ༩ͳͲ֤αʔϏεʹҠৡ • JSON over HTTPͳAPIͷΈΛఏڙ͢Δ •
ରSSKDs (= small set of known developers)
৽ܾࡁγεςϜ ߏਤ ܾࡁߦαʔϏε (֎෦) ͯͳͷαʔϏε ༗ྉϓϥϯͷ ঢ়ଶཧ ৽ܾࡁγεςϜ
چ ৽
ͳͥϚΠΫϩαʔϏε͔
ϚΠΫϩαʔϏεͰ࡞Δ͔ • 1ʙ3ষʹ͔͚ͯϝϦοτ ʮ༏ΕͨαʔϏεʯʹ͍ͭͯ ड़ΒΕ͍ͯΔ • ϚΠΫϩαʔϏεʹΑͬͯ αʔϏεΑΓΑ͘ͳΔͷ͔ • ΨόφϯεͳͲɺ
ίετ͑ΔͩΖ͏͔ https://www.oreilly.co.jp/books/9784873117607/
ૄ݁߹ͱߴڽूੑ 1. ϞϊϦγοΫͰखΛೖΕͮΒ͍ (ີ݁߹) 2. ৽ͨʹ༗ྉϓϥϯΛಋೖ͍ͨ͠αʔϏε࠶࣮ 3. υϝΠϯ͕ࣝྲྀग़ (ڽूੑ) 4.
࣋ଓՄೳʹ࡞Γ (ͳ͓͠) ͍ͨ • είʔϓΛখ͘͞໌ྎʹอͭ • ૄ݁߹ (ʰϚΠΫϩαʔϏεΞʔΩςΫνϟʱ3.2.1) • ߴڽूੑ
(ʰϚΠΫϩαʔϏεΞʔΩςΫνϟʱ3.2.2) • ׂ౷࣏͢Δ • ٕज़ҟ࣭ੑ (͍ͭ·ͰPerlݫ͍͠) • σϓϩΠͷϥΠϑαΠΫϧΛૣΊΔ
νʔϜؒ࿈ܞͷ Ή͔ͣ͠͞ͱઓ͏
ΠϯηϓγϣϯσοΩΛ࡞Δ • ۙ͝ॴ͞ΜΛ໌Β͔ʹ͢Δ • ϝϯςͲ͜ʹҾ͖ܧ͙ͷ͔ • ԿΛ༏ઌ͢Δͷ͔ (ఘΊΔͷ͔) Λ͖ͬΓͤ͞Δ •
είʔϓɺ࣭ɺ༧ࢉɺεέδϡʔϧ • ʰΞδϟΠϧαϜϥΠʱ
ͳͥϚΠΫϩαʔϏε͔: ·ͱΊ • ࠓճϚΠΫϩαʔϏεͰ͍ͬͯ͘ • ಘΒΕΔϝϦοτ > ͏ίετ • ΨόφϯεͳͲෆ҆ͳʹखΛଧͭ
• ΠϯηϓγϣϯσοΩ • ૣ͔͘Βר͖ࠐΉ
ͳͥScala͔
࣮ݴޠΛܾΊΔ • ͯͳͷબࢶͱͯ͠Perl, Go, ͦͯ͠Scala • ৽ܾࡁγεςϜͷίΞυϝΠϯʹٕज़ͦͷͷ ؚ·Εͳ͍ • ϦεΫΛͱͬͯଞͷ৽ͨͳݴޠΛ࠾༻͢Δ
ϝϦοτബ͍
࣮ݴޠΛܾΊΔ • ͳʹ͔ࢦඪ͕΄͍͠ • ؾ͍࣋ͪΖ͍Ζ͋Δ • ʮ͖͔ͩΒʯͰ͍͍͚Ͳ…… • ͲΜͳPros/ConsΛݟͨͷ͔
ඇػೳཁٻΛఆΊΔ • ISO 9126 • functionality: ػೳੑ • reliability: ৴པੑ
• usability: ༻ੑ • efficiency: ޮੑ • maintainability: อकੑ • portability: Ҡ২ੑ
ඇػೳཁٻΛఆΊΔ • ISO 9126 • functionality: ػೳੑ • reliability: ৴པੑ
• usability: ༻ੑ • efficiency: ޮੑ • maintainability: อकੑ • portability: Ҡ২ੑ
ݴޠΛબͿ্ͰٻΊΔͷ • ๛͔ͳදݱྗ • ෳࡶͳυϝΠϯΛաෆͳ͘දݱ͍ͨ͠ • ֶशۂઢͷ؇͔͞ • ։ൃεϐʔυΛૣΊʹߴΊ҆ఆ͍ͤͨ͞ •
কདྷɺ։ൃ͢Δਓʹ͘͞͠
ෳࡶͳυϝΠϯ • ঢ়ଶߟྀ͖͢ม͕ೖΓΜͰ͍Δ • ΫϨδοτΧʔυͷ༗ޮظݶ͕Ε͍ͯͨΒ? • ܾࡁߦαʔϏε͕མ͍ͪͯͨΒ?
ঢ়ଶΛྻڍܕͰදݱ͢Δ sealed trait State object State { case object Requested
extends State case object Paid extends State case object Failed extends State } ※࣮ࡍ͏ͪΐͬͱ͍Ζ͍Ζ͋Γ·͢
ঢ়ଶΛྻڍܕͰදݱ͢Δ case class Payment(state: State) { def charged: Boolean =
state match { case State.Paid => true case _ => false } }
ঢ়ଶΛྻڍܕͰදݱ͢Δ • sealedम০͢ΔͱmatchࣜͰཏੑνΣοΫͰ͖Δ • ͱΓ͏Δঢ়ଶʹ໊͍ͭͯલΛ༩͑ΒΕΔ • ʮPaid͔FailedʹͳͬͨΒͦͷPayment ऴ͠·͢Ͷʯ
Scalaͷֶशۂઢ……? • ؇͔Ͱͳ͍! (ݸਓͷݟղ) • ͔ͯ͠͠ͳͰࢧԉ͢ΔڥΛ͖͑ͯͨ • ࣄྫ (Mackerel, ͯͳϒοΫϚʔΫϦχϡʔΞϧ)
• ͯͳڭՊॻ github.com/hatena/Hatena-Textbook • ScalaͷఆੴΛ୳Δձ
ScalaͷఆੴΛ୳Δձ • ϥΠϒϥϦ࣮ύλʔϯͷݟΛ࣋ͪدΔ • ScalaΛ͍ͬͯΔνʔϜͷ༗ࢤͰ։࠵ • Mackerel • ϒοΫϚʔΫϦχϡʔΞϧ •
৽ܾࡁγεςϜ
ఆੴΛ୳ΔձͰͨ͜͠ͱ • ϨΠϠߏ • ΞϓϦέʔγϣϯ • υϝΠϯ • Πϯϑϥ •
બΜͩWAF/ORMͱͦͷഎܠ
ͳͥScala͔: ·ͱΊ • ৽ܾࡁγεςϜ͕ٻΊΔཁ݅Λຬͨͯ͘͠Εͦ͏ • ػೳੑ • อकੑ • ScalaΛॻ͘ΤϯδχΞΛҭͯΔΛ͖͑ͯͨ
• ScalaͷఆੴΛ୳ΔձɺڭՊॻ
DDDͷ࣮ફ
DDD͍ͨ͠ • υϝΠϯΤΩεύʔτͷ͕ࣝ ͦͷ··མͱ͠ࠐ·ΕͨαʔϏεʹ͍ͨ͠ • ཁૉٕज़ (Πϯϑϥ) ͱՄೳʹ͍ͨ͠ • ࠷ѱ·ͨ࡞Γ͢͜ͱʹͳͬͯ
ΑΓ௧ΈΛগͳ͍ͨ͘͠
ݱߦܾࡁγεςϜͷল • ํ͕పఈ͞Εͳ͔ͬͨ • ʮApp͏ͩΊͩɺServiceͰΓͳ͓ͦ͏ʯ • ͷPerl൛Active RecordతORM • ϞσϧɺαʔϏεɺϦϙδτϦ͕ᕒવҰମ
• Perlͷݶք • ΠϯλʔϑΣʔε͕ͳ͍ • ΧϓηϧԽ͕ۃΊͯࠔ
ͯͳϒοΫϚʔΫ in Scala
[PR] PerlͰΠέͯΔ։ൃ͍ͯ͠·͢ Perlͷ্ʹࡾ ʙͣͬͱΠέͯΔαʔϏεΛ࡞Γଓ͚Δٕज़ʙ http://yapcasia.org/2015/talk/show/de9e7a1e-136d-11e5-a9fc- d9f87d574c3a
DDDؒ
ͯͳࣾͰ։࠵ͨ͠ DDDษڧձͷ༷ࢠΛ͝հ͠·͢ http://developer.hatenastaff.com/entry/2015/08/20/170300
ΤϦοΫɾΤϰΝϯεͷ υϝΠϯۦಈઃܭ http://www.shoeisha.co.jp/book/detail/9784798126708
࣮ફυϝΠϯۦಈઃܭ http://www.shoeisha.co.jp/book/detail/9784798131610
ࣾDDDษڧձ
ࣾDDDษڧձ • ۙͳέʔεʹ͍ͭͯٞ • ৽͘͠࡞ΔͳΒɺ͍·͔Βվળ͢ΔͳΒ • ֎ͷੈքͷݟΛڞ༗ • ʮScalaͩͱ͜͏͍͏ػೳ͕͋ͬͯ……ʯ •
ʮHaskellͩͱ……ʯ • ʮRubyͷ˓˓ͱ͍͏ϥΠϒϥϦ……ʯ
DDDͷ࣮ફͱ࡞ઓ
Μͩͱ͜ΖɾݟͲ͜Ζ • ΤϯςΟςΟͷදݱ • ґଘੑͷೖ (DI) • cake pattern •
αϒϓϩδΣΫτԽ • layering violationΛ͙
ΤϯςΟςΟͷදݱ
ΤϯςΟςΟͷදݱ • ΤϯςΟςΟૉͳcase class • ORMSlick • tarao/slick-jdbc-extensionΛͬͯੜSQLͰҾ͍ͯ case classϚοϐϯά
ΤϯςΟςΟͷදݱ • ΤϯςΟςΟ = ID + υϝΠϯϞσϧ • ܕύϥϝʔλԽ͞Ε͍ͯΔ •
υϝΠϯϞσϧʹରͯ͠ڞม • ಉ͡IDܕ͕ͩυϝΠϯϞσϧ͕ҟͳΔ ΤϯςΟςΟΛఆٛͰ͖Δ
ίʔυྫ case class EntityKey[ID]( val repr: String ) extends AnyVal
abstract class Entity[K, +V]( val id: EntityKey[K], val value: V )(implicit ev: V <:< K)
ίʔυྫ case class EntityKey[ID]( val repr: String ) extends AnyVal
abstract class Entity[K, +V]( val id: EntityKey[K], val value: V )(implicit ev: V <:< K) phantom type
ίʔυྫ case class EntityKey[ID]( val repr: String ) extends AnyVal
abstract class Entity[K, +V]( val id: EntityKey[K], val value: V )(implicit ev: V <:< K) ܕΛڞมʹ
ίʔυྫ case class EntityKey[ID]( val repr: String ) extends AnyVal
abstract class Entity[K, +V]( val id: EntityKey[K], val value: V )(implicit ev: V <:< K) ͷܕ͕IDͷܕͷαϒΫϥεͰ͋Δ ܕύϥϝʔλ੍
cake pattern
ΠϯλʔϑΣʔεΛఆٛ package repo trait AccountComponent { def accountLoader: AccountLoader trait
AccountLoader }
࣮ package infra.db trait AccountComponent extends repo.AccountComponent { def accountLoader:
AccountLoader = AccountDB object AccountDB extends AccountLoader { ... } }
ґଘͷએݴͱ༻ package app trait AccountApp { self: repo.AccountComponent => accountLoader.find(...)
}
ґଘͷೖ package main object Root extends app.AccountApp with infra.db.AccountComponent
cake pattern • ίϯύΠϧλΠϜͰDI͞ΕΔ • Playͷίϯτϩʔϥcake componentͱͯ͠߹
DDDͷ࣮ફ: ·ͱΊ • ࣾษڧձͰʰ࣮ફDDDʱΛྠಡɺݟΛڞ༗ • զʑʹͱͬͯͪΐ͏ͲΑ͍DDDΛݟ͚ͭΔ • ScalaͷྗΛ׆͔࣮ͨ͠ύλʔϯͷൃݟ
·ͱΊ • ۜͷؙͳ͍! • ཁ݅ʹ͍͋ͬͯΔ͔ߟ͑Δ • ཁ݅ʹ͋ΘͤͯΞϨϯδ͍ͯ͘͠ • ʮͪΐ͏Ͳ͍͍DDDʯ •
ʮͪΐ͏Ͳ͍͍ϚΠΫϩαʔϏεʯ • ࣌ʹࣃΛ৯͍͠Δ