Scala: Mobile Backend on AWS

Transcript

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2. #cmdevio2016 #B
3. whoami • Yusuke Arai • Classmethod (2014/11~) • Mobile Backend API Team (2015/02~) • AWS / Scala / Javascript / android • dev.classmethod.jp/author/arai-yusuke
4. Today's topics • Scalaͷoverview • ScalaΛ࢖ͬͨϞόΠϧόοΫΤϯυAPI • ͳͥAWSωΠςΟϒͷ࣌୅ʹScala͕ඞཁ͔ • How to આಘ your client in "Scala࢖͍·͢!"
5. Today's topics • Scalaͷoverview • ScalaΛ࢖ͬͨϞόΠϧόοΫΤϯυAPI • ͳͥAWSωΠςΟϒͷ࣌୅ʹScala͕ඞཁ͔ • How to આಘ your client in "Scala࢖͍·͢!"
6. Scalaͷoverview
7. Martin Odersky Deutscher Informatiker / 1958~
8. Scala • JVMݴޠʢJavaόΠτίʔυΛੜ੒ʣ • JavaͷطଘίʔυΛ௚઀ࢀরՄೳ • ڧ͍੩తܕ෇͚ݴޠ • ໊લ͸"Scalable"͔Β
9. Scala ͷจ๏ • ηϛίϩϯͷͳ͍JavaͬΆ͘΋ॻ͚Δ • RubyͬΆ͘΋ॻ͚Δ • هड़ྔ͕গͳ͍ • ৄ͘͠͸άά͍ͬͯͩ͘͞m(_ _)m
10. Scala ͷ΢ιɾϗϯτ
11. Αࣖ͘ʹ͢Δ࿩ • ؔ਺ܕͷϓϩάϥϛϯάݴޠ • Rubyʹ͍ۙͷͰLLܦݧऀͳΒָউ • Java͕Θ͔Ε͹͙͢ʹॻ͚ΔΑ͏ʹͳΔ • ΤίγεςϜʢPlayʣ͸RailsϥΠΫ
12. શ෦΢ιͰ͢ • ؔ਺ܕͷϓϩάϥϛϯάݴޠ • Rubyʹ͍ۙͷͰLLܦݧऀͳΒָউ • Java͕Θ͔Ε͹͙͢ʹॻ͚ΔΑ͏ʹͳΔ • ΤίγεςϜʢPlayʣ͸RailsϥΠΫ
13. Scala ͷϗϯτ
14. Scalaͷϗϯτ • ચ࿅͞ΕͨOOPݴޠ
 ͨͩ͠HaskellͷӨڹΛڧ͘ड͚͓ͯΓɺؔ਺ܕͷ ॻ͖ํͰॻ͘͜ͱ΋Մೳʹͳ͍ͬͯΔ • JVM΍Javaݴޠ΁ͷཧղ͕ඞཁ • ΤίγεςϜʢPlayʣ͸ڧྗͳܕγεςϜΛ಺แ͠
 FP, FRPΛલఏͱ͍ͯ͠Δ
15. Not ؔ਺ܕݴޠ • ݁ߏ͋Δצҧ͍ʮScala͸ؔ਺ܕݴޠDA!ʯ • Scalaࣗମ͸ચ࿅͞ΕͨOOPݴޠ • ͨͩ͠७ਮؔ਺ϕʔεͷ։ൃΛڧ͘αϙʔτͯ͠Δ • Haskellͱಉ͡ॻ͖ํΛ͠Α͏ͱࢥ͑͹Մೳ
 ओͳཧ༝ͱͯ͠Scala͕ΞυϗοΫଟ૬ੑΛදݱͰ͖ Δ͔Β
16. Java/JVMͷཧղ͕ඞཁ • JVM͕ܕফڈϞσϧͰ͋Δ͜ͱʢॏཁʣ • Generics͸Java 1.5Ͱ௥Ճ͞Εͨ͜ͱ, ClassManifestͷڍಈ, etc… • Javaͷจ๏ͳͲΑΓ΋ɺJavaͷྺ࢙ʹର͢Δ
 ཧղ͕ඞཁ
17. ☓ LL࿩ऀͳΒೃછΈ΍͍͢ • Scala͸altJavaͱͯ͠΋ར༻Ͱ͖Δ͕
 ͦΕ͸"Scalaݴޠ"ʹݶͬͨ࿩ͰɺΤίγεςϜ͕ͦΕΛ
 ڐ͢ͱ͸ݶΒͳ͍ • Play Framework 2.4 ͸ڧྗͳܕγεςϜΛ಺෦ʹ࣋ͪɺ
 ਵॴͰܕγεςϜ΁ͷཧղΛཁٻ͢Δɻ • ྫ: JsResult ͸ Applicative Functor
 Writes ͸ Contravariant Functor
18. ࢹ఺Λม͑Δ
19. Scala Λ࢖͍͚ͬͯ͹…… • JVM΍Javaͷྺ࢙ʹ͍ͭͯਂ͘ཧղͰ͖Δ • ؔ਺ܕͷάουϓϥΫςΟε͕औΓࠐΊΔ • ܕΫϥεɺ୅਺తσʔλܕɺؔखɺϞφυ
 ͳͲͷమ൘ύλʔϯ͕࢖͑ΔΑ͏ʹͳΔ • ৽͠ΊͷݴޠͰ͸͍͍ͩͨˢ͕Ұ෦·ͨ͸શ෦࢖͑Δ
 ྫ͑͹Swiftʹ΋flatMapϝιου͕༻ҙ͞Ε͍ͯ·͢ • ৽͍͠ػೳΛ࢖͍͜ͳ͠඼࣭ͷߴ͍ΞϓϦΛ࡞Δ͜ͱ͕Մೳʹʂ

20. Scalaͷoverview ͸ ͜Μͳײ͡Ͱ͢
21. Today's topics • Scalaͷoverview • ScalaΛ࢖ͬͨϞόΠϧόοΫΤϯυAPI • ͳͥAWSωΠςΟϒͷ࣌୅ʹScala͕ඞཁ͔ • How to આಘ your client in "Scala࢖͍·͢!"
22. ScalaΛ࢖ͬͨ
 ϞόΠϧόοΫΤϯυAPI
23. ϞόΠϧAPIαʔόʔΛ࡞ͬͨ • डୗϞόΠϧΞϓϦҊ݅ • ϦϦʔεޙ͸C100K͕΄΅ؒҧ͍ͳ͍ • ҆ఆͯ͠ࡹͨ͘ΊʹϑϩϯτAPIαʔόʔʹ͸
 Play-ScalaΛ࠾༻ • όοΫΤϯυ΋AkkaΛ࢖͍͍ͨͱ͍͏ཧ༝͔Β
 Play-Scalaʹͨ͠
25. ։ൃͷਐΊํ • ϑϧͰςετॻ͘
 ʢશΫϥεϢχοτςετɺAPIຖ࠷௿̍݁߹ςετʣ • pull reqϨϏϡʔඞਢ • Scalaz΍Cats͸࢖Θͳ͍ • ࠓϦϦʔεલͳͷͰύϑΥʔϚϯεɾӡ༻ʹ͍ͭͯͷ͜ͱ͸Կͱ΋ ݴ͑ͳ͍ʢϦϦʔεͰ͖͍ͯͨΒӡ༻ϊ΢ϋ΢Λ͓఻͔͑ͨͬͨ͠Ͱ͢……ʣ
26. ։ൃͰײͨ͜͡ͱ
27. ͑͛ͭͳ͍΄Ͳॻ͖΍͍͢ • ϘΠϥʔϓϨʔτίʔυͷগͳ͞ʹҺͼٽ͘ • ݴޠͦͷ΋ͷ͕ImmutableΛਪͯ͘͠ΕͯΔ ͜ͱͷ༗Γ೉ΈΛࢥ͍஌Δ • ผʹΧοίΑ͘ॻ͜͏ͱͯ͠ͳ͍ͷʹؔ਺͸
 ͍͍ͩͨ5ߦҎ಺ʹ·ͱ·Δ
28. ΊͬͪΌಡΈ΍͍͢ • ʮScala͸ه߸͹͔ͬͰಡΈʹ͍͘ʯͬͯ
 ͱ͓͍ੲʹฉ͍ͨ͜ͱ͕͋ͬͨ • ͦΕ͸௒HaskellͬΆ͘ॻ͍ͨ৔߹ͷ࿩ͩͬͨ • γϯϓϧʹॻ͍͍ͯ͘ͱӳޠͬΆ͍จ຺Λ࣋ͭ • pull reqϨϏϡʔ͕ḿΔ
29. ͳΜͱͳ͘ӳޠͬΆ͍ͷͰ͢
30. Akka • ࠓճ͸ϫʔΧʔΛAkka SchedulerͰ࣮૷ • AkkaͷFault ToleranceΛങͬͨ • Amazon SQS΍Amazon SNSͱ͏·݁͘߹͢Δ • DynamoDB Stream΍Kinesisͱ͚ͬͭͨ͘Β
 ઈରָ͍͠ͰΑ͢Ͷ
31. AWS Java SDK͕࢖͑Δ • AWSͷϑϧϚωʔδυαʔϏεʢCognito΍DynamoDBʣ ͱ΍ΓऔΓ͢ΔΞϓϦΛ࡞Δ৔߹ɺ
 AWS SDKͷυΩϡϝϯςʔγϣϯ۩߹͸ࢮ׆໰୊ • AWS Java SDKʹ͸Կͷ৺഑΋ͳ͔ͬͨ • Scalaͷݴޠࢥ૝ͱͯ͠ʮmutable࣮૷ΛimmutableͳΠϯ λϑΣʔεͰӅṭʯͱ͍͏ͷ͕͋Δ
 ˠ AWS Java SDK ͸Πϯϑϥ૚ͰӅṭͰ͖ΔͷͰແ໰୊
32. ΞʔΩςΫνϟͷར఺ʢ1ʣ • ७ਮؔ਺ܕݴޠͩͱmainؔ਺ͷ֎ଆɺͭ·Γࣗ෼Ͱίϯτ ϩʔϧͰ͖ͳ͍ྖҬ·Ͱ෭࡞༻Λ஗Ԇ͠ͳ͚Ε͹ͳΒͳ͍ ʢ͜ͱ͕ଟ͍ʣ • ScalaͰ͸෭࡞༻Λى͜͢λΠϛϯάΛࣗ෼Ͱ
 ίϯτϩʔϧͯ͠OK
 ※ Haskellʹ΋unsafePerformIOͱ͔͸͋Γ·͕͢…… • ຊ౰ʹ஗Ԇ͢΂͖෭࡞༻ʢυϝΠϯϩδοΫ͕ى͜͢෭࡞༻ʣ ͱͦΕҎ֎ʢϩάͱ͔ʣΛผͷ΋ͷͱͯ͠ѻ͏͜ͱ͕༰қ ιϑτ΢ΣΞ
33. ΞʔΩςΫνϟͷར఺ʢ2ʣ • ݴޠϨϕϧͰDIΛڧ͘αϙʔτ͢ΔͷͰ
 DIPୡ੒ͷલఏ͕͋ΔΞʔΩςΫνϟͱೃછΉ • Layered Architecture, Onion Architecture… • DDDͳͲͰΑ͘࠾༻͞ΕΔΞʔΩςΫνϟ ιϑτ΢ΣΞ
34. ଓ͖͸·ͨޙͰ
 ࣌ؒʹ༨༟͕͋Ε͹
35. Today's topics • Scalaͷoverview • ScalaΛ࢖ͬͨϞόΠϧόοΫΤϯυAPI • ͳͥAWSωΠςΟϒͷ࣌୅ʹScala͕ඞཁ͔ • How to આಘ your client in "Scala࢖͍·͢!"
36. ͳͥAWSωΠςΟϒ࣌୅ʹ Scala͕ඞཁ͔
37. ϚΠΫϩαʔϏε ΞʔΩςΫνϟ
38. ϚΠΫϩαʔϏεΞʔΩςΫνϟ • Ұͭͷ໾ׂΛ΋ͬͨૄ݁߹Ͱখ͞ͳαʔϏε ʢίϯϙʔωϯτʣͷू߹Ͱେ͖ͳαʔϏε ʢΞϓϦέʔγϣϯʣΛߏங͢Δ • ͦΕͧΕͷαʔϏε͸Dockerίϯςφ΍EC2 Πϯελϯεͱͯ͠දݱ͞ΕΔ • ϚΠΫϩαʔϏεಉ࢜͸HTTPSͳͲͰ௨৴
39. © NGINX via https://www.nginx.com/blog/service-discovery-in-a-microservices-architecture/
40. ࣮ࡍͲ͏ͳͷ • ScalaMatsuri 2016Ͱ৭ʑͳηογϣϯΛ
 ฉ͍ͯདྷ·͕ͨ͠ʮϦΞΫςΟϒʯ΍ʮϚΠΫϩ αʔϏεʯʹ·ͭΘΔηογϣϯ͕ଟ਺ • ೔ຊͷํΑΓ΋ւ֎ͷํͷηογϣϯଟ͠
 ˠ ւ֎Ͱ͸طʹσϑΝΫτʹͳ͖ͬͯͯͦ͏ • “ϦΞΫςΟϒ͸ResiliencyͷͨΊͷखஈͰ͋Δ”
41. ߋʹઌΛோΊΔ
42. ͦͷઌʹ߇͑Δͷ͸ ͕ओମͷΞʔΩςΫνϟ
43. AWS Lambda ͕ओମ΁ • όοΫΤϯυʹ͋Δmicro services΁ͷ
 ΦʔέετϨʔγϣϯͰ͸ͳ͍ • υϝΠϯϩδοΫ͕AWS Lambda Functionͱ
 ͯ͠දݱ͞ΕΔαʔόʔϨεΞʔΩςΫνϟ • ୯Ґ͕ micro services ͔Β functions ΁
44. Evolution of Compute – Public Cloud Infrastructure Instances Application code ©Amazon Web Services via http://www.slideshare.net/AmazonWebServices/arc308-the-serverless-company-using-aws-lambda/
45. Evolution of Compute – Containers Infrastructure Instances Application code Containers ©Amazon Web Services via http://www.slideshare.net/AmazonWebServices/arc308-the-serverless-company-using-aws-lambda/
46. Evolution of Compute – Serverless Application code ©Amazon Web Services via http://www.slideshare.net/AmazonWebServices/arc308-the-serverless-company-using-aws-lambda/
47. ࣮ࡍͲ͏ͳͷ • AWS re:Invent 2015ͰϚΠΫϩαʔϏεؔ࿈ͷηο γϣϯ͕ଟ͘ൃද͞ΕΔதͰɺੈքʹ޲͚ͯൃ৴͞Ε ͨ֓೦ʢൃද͞Εͨͷ͸͢Ͱʹ࣮ફ͞Εͨ΋ͷʣ • ͍ͣΕɺඞͣདྷΔαʔόʔϨεͷະདྷΛ৅௃͍ͯ͠Δ • ͦͷ”ະདྷ”͕དྷΔ೔ͷ͜ͱΛɺ
 ݸਓతʹ”Lambda Xσʔ”ͱݺΜͰ·͢
49. ਂΈʹμΠϒ͍ͨ͠ํ͸ฐࣾ୮಺ͷهࣄΛͥͻνΣοΫʂ reinvent2015 ϚΠΫϩαʔϏε
50. For Your Information
51. 2015.02 Lambda in VPC!! ©Amazon Web Services via http://aws.typepad.com/aws_japan/2016/02/access-resources-in-a-vpc-from-your- lambda-functions.html
52. ͯ͞
53. ͰΞϓϦέʔγϣϯ
 Λ։ൃ͢Δ৔߹ͷબ୒ࢶ
57. Scala in AWS Lambda • Lambda͸ScalaͰॻ͚·͢ɻ͜Ε͸Scalaʹݶͬͨ࿩ Ͱ͸ͳ͘ɺJVMݴޠͳΒOKɻ • ͬ͟ͱࢼͨ͠ײ͡Ͱ͸ແཧ΍Γײ͕ͰΔ͜ͱ΋ͳ͘ɺ ͍͍ײ͡ʹॻ͚·͢ɻ • ٕज़ௐࠪΛਐΊ͍ͯͯɺ΋͏গ͠φϨοδ͕ཷ·Ε͹
 ͍ۙ͏ͪʹຊ൪ద༻ՄೳʹͳΓͦ͏ɻ
58. Scala in AWS Lambda • Lambda͸ScalaͰॻ͚·͢ɻ͜Ε͸Scalaʹݶͬͨ࿩ Ͱ͸ͳ͘ɺJVMݴޠͳΒOKɻ • ͬ͟ͱࢼͨ͠ײ͡Ͱ͸ແཧ΍Γײ͕ͰΔ
 ͜ͱ΋ͳ͘ɺ͍͍ײ͡ʹॻ͚·͢ɻ • ٕज़ௐࠪΛਐΊ͍ͯͯɺ΋͏গ͠φϨοδ͕ཷ·Ε͹
 ͍ۙ͏ͪʹຊ൪ద༻ՄೳʹͳΓͦ͏ɻ ͜ͷลΓΛ۷ΓԼ͛Δ࿩Λ݄̑ʹ෱ԬͰ͠·͢ʂ
 ʲScala෱Ԭ2016ʳͰݕࡧݕࡧʂ
59. ͳͥScalaΛબͿ΂͖͔ • AWS LambdaΛ࢖͏্Ͱ৐Γӽ͑ͳ͚Ε͹ͳΒͳ ͍ͷ͸”݁߹ςετͷॻ͖ʹ͘͞” • ݁߹ςετΨϯΨϯॻ͍ͯͽΎΜͽΎΜਐΊΑ͏ͥ
 ͱ͍͏จԽͱ͸͏·͘߹க͠ͳ͍ • ϢχοτςετͷΈͰΑΓଟ͘ͷ৺഑ࣄΛ
 ղফ͢Δʹ͸Ͳ͏͢΂͖͔
60. ͳͥScalaΛબͿ΂͖͔ • AWS LambdaΛ࢖͏্Ͱ৐Γӽ͑ͳ͚Ε͹ͳΒͳ ͍ͷ͸”݁߹ςετͷॻ͖ʹ͘͞” • ݁߹ςετΨϯΨϯॻ͍ͯͽΎΜͽΎΜਐΊΑ͏ͥ
 ͱ͍͏จԽͱ͸͏·͘߹க͠ͳ͍ • ϢχοτςετͷΈͰΑΓଟ͘ͷ৺഑ࣄΛ
 ղফ͢Δʹ͸Ͳ͏͢΂͖͔ ڧ͍੩తܕγεςϜͷݎ࿚͞ͱ
    ؔ਺ܕͷҟৗܥදݱྗΛۦ࢖͢΂͠ʂ
    
61. rapture.core.Result via https://github.com/propensive/rapture
62. scalaz.\/ via https://github.com/scalaz/scalaz ʢEitherT΋͋ΔΜͩΑʂʣ
63. scala.util.Either via https://github.com/scala/scala
64. ؔ਺ܕͷҟৗܥදݱྗ • ͋ΔৼΔ෣͍Λςετ͢Δʹ͋ͨΓɺͦͷৼ Δ෣͍͕ى͜͢෭࡞༻ࠐΈͰςετ͢ΔͷͰ ͸ͳ͘ɺҟৗܥ΍IOΞΫηεΛදݱՄೳͳܕ Λѻ͍ɺ෭࡞༻ͷൃੜՕॴΛΪϦΪϦ·ͰΞ ϓϦέʔγϣϯͷ֎ଆʹ࣋ͪӽ͢Α͏ʹ͢Δ ͜ͱͰɺ෭࡞༻ൃੜ௚લͷ஋͕ਖ਼͍͜͠ͱ ʢ==ʣΛอূ͢Δςετ͕ॻ͚Δɻ
65. ݱঢ়ͷࡉ͔͍Cons • Artifact ZIPʹ50MB੍ݶ͕͋Δ
 → ࡞ΓํΛ޻෉͢Δඞཁ͕͋Δ΋ͷͷɺ
 ɹ ϚΠΫϩαʔϏεͷߟ͑ํΛܧঝ͢ΔͳΒ͹
 ɹ ରॲՄೳͳ੍ݶ • JVMͷॳճىಈίετ͕Φʔόʔϔουʹʁ
 ˠ Lambda in VPCͳΒ͹ENIίετ΋͋ΔͷͰɺ
 ɹ ॳճ͸஗͍΋ͷͱׂΓ੾Δ
66. Ұ൪఻͔͑ͨͬͨࣄͳͷͰ ͪΐͬͱৼΓฦΓ
67. ͳͥAWS࣌୅ʹScala͔ • Lambda Xσʔ͸ඞͣདྷΔ • େن໛ΞϓϦΛLambdaͰ࡞Δ೔͕͘Δ • AWS݁߹ςετΛແཧ΍Γॻ͘ͷͰ͸ͳ͘
 ϢχοτςετͰ୲อͰ͖ΔྖҬΛ૿΍͢ • ͦ͏͍͏ॻ͖ํΛڧ͘αϙʔτ͍ͯ͠Δͷ͕Scala
68. Today's topics • Scalaͷoverview • ScalaΛ࢖ͬͨϞόΠϧόοΫΤϯυAPI • ͳͥAWSωΠςΟϒͷ࣌୅ʹScala͕ඞཁ͔ • How to આಘ your client in "Scala࢖͍·͢!"
69. How to આಘ your client in "Scala࢖͍͍ͨ!"
70. "Play-ScalaΛ࢖͍·͢!" ͱ͍͏ఏҊΛ͢ΔͨΊʹ͸ ͍͔ͭ͘ͷFrameworkͱ ൺֱݕ౼Λߦ͏ඞཁ͕͋ͬͨ
71. ୅දతFramework • Ruby on Rails (Ruby) • Express (Node.js) • Laravel (PHP) • Play Framework (Java) • etc
72. લḗઓ vs Rails, Node, PHP
73. vs Rails, Node, PHP • Play-Scalaͱ͸໰୊ղܾͷϞσϧ͕͸͖ͬΓ
 ҧ͏ͷͰɺઆ໌ʢઆಘʣ͠΍͍͢ɻ • ଱ো֐ੑʢResiliencyʣ, ৳ॖੑʢElasticityʣ
 ৴པੑʢReliabilityʣͳͲͰѹউ͢Δɻ • ڧ͍ͯݴ͑͹1ΠϯελϯεͰC100Kͷޭ੷͕͋Δ Node͕Ұ൪ͷϥΠόϧɻ
74. ଱ো֐ੑʢResiliencyʣ • AkkaͷFault Toleranceઓུ͸Erlang/OTPͳͲ ͱฒͼ࠷ڧΫϥεͷ଱ো֐ੑΛఏڙ • ࢓૊ΈΛཧղͯ͠ਖ਼͘͠࢖͑͹ɺۚ༥ج൫΍ Πϯϑϥج൫ʹ༻͍͏ΔϨϕϧ • લḗઓͰ͸આಘͷϝΠϯ΢Σϙϯ
75. ৳ॖੑʢElasticityʣ • ޿ٛͰͷεέʔϥϏϦςΟ • AkkaϕʔεͷΫϥελϦϯά͕༰қ • Play΋Akkaͷ࢓૊Έͷ্Ͱಈ͍͍ͯΔ • Play-Scalaͷ୯ମॲཧੑೳ͸NodeΑΓߴ͍
 ˞ 2015/05࣌఺ͷϕϯνϚʔΫ
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97. %FWFMPQFST*0
     ͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ɻ
    εϥΠυ͸ޙ೔ϒϩάͰެ։͠·͢ɻ  " ⡥
    $MBTTNFUIPE
    *OD #cmdevio2016