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Micronautで入門!実践!サーバーサイドKotlin/sskm1_sample
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Micronautで入門!実践!サーバーサイドKotlin/sskm1_sample
技術書典 17の新刊「Micronautで入門!実践!サーバーサイドKotlin」のサンプルです
お求めは技術書典か、BOOTHまで!
FORTE
October 24, 2024
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Micronaut Ͱೖ!࣮ફ!αʔ όʔαΠυ Kotlin FORTE ɹஶ 2024-11-03 ൛ aozora Project
ൃߦ 1
͡Ίʹ ஶऀͷ FORTE(ϑΥϧς) Ͱ͢ɻαʔόʔαΠυ Kotlin ͷ৽ץΛॻ͘ͷ 3 ʙ4 ͿΓ͘Β͍ͷΑ͏Ͱ͢ɻϑϨʔϜϫʔΫͱͯͣͬ͠ͱ Spring
Boot Ͱ հ͖͓ͯͯ͠Γɺ࣍ Ktor ͔ɺSpring Boot Ͱผͷํ໘ʹ͍͔͘ͱΜͰ͍ Δ͏ͪʹ͍ͭͷ·ʹ͔ผͷϑϨʔϜϫʔΫ͕ొ͖͍ͯͯ͠·ͨ͠ɻͳ͔Ͱ MicronautɺQuarkus ͕ؾʹͳ͓ͬͯΓɺKotlin Fest 2024 Ͱ Micronaut ʹΑ ΔαʔόʔαΠυ Kotlin ͷΛฉ͍ͨͷͰधཁ͕͋Δͷ͔ͳͱࢥ͍ Micronaut ʹͨ࣍͠ୈͰ͢ɻ ͳ͓ɺ࠷ۙۀҕୗͰαʔόʔαΠυ Kotlin Λۀͱͯ͠ॻ͖࢝ΊͨͷͰ͢ ͕ɺͦͷݱͰ͍ΘΏΔϑϧελοΫͩͬͨΓߴػೳͳϑϨʔϜϫʔΫ༻ ͓ͯ͠ΒͣɺඞཁͳػೳʹԠͯ͡ϥΠϒϥϦΛՃ͢ΔܗΛͱ͍ͬͯ·͢ɻͦ͏ ݴͬͨҙຯͰϑϨʔϜϫʔΫͱ͍͏֓೦ʹͱΒΘΕΔͷͰແ͘ɺϥΠϒϥϦ୯ ҐͰհ͍ͯ͘͠ͷ໘നͦ͏Ͱ͢Ͷɻ ͦΕͦΕͱͯ͠ɺࠓճ Micronaut ΛͬͯαʔόʔαΠυ Kotlin ʹೖ ͍͖ͯ͠·͢ɻ ຊஶͷ༰ ͜ͷຊචऀ͕ Micronaut ͰαʔόʔαΠυ Kotlin Λࢼͯ͠ΈͨதͰٙʹ ࢥͬͨ͜ͱௐͨ͜ͱΛٕज़ॻͷܗͰΞτϓοτͨ͠ͷͰ͢ɻMicronaut ͱͳΜͧ?ͱ͍͏ͱ͜Ζ͔Βɺ ࣮ࡍʹίʔυΛॻ͖αʔόʔαΠυͱͯ͠ API ͕ಈ͘ஈ֊·ͰΛհ͍ͯ͠·͢ɻ ೖॻͳͷͰ Kotlin Λॻ͍ͨ͜ͱ͕ͳ͍ɺڥ͢Βͳ͍ͱ͍͏ํͰେৎͰ ͢ɻڥߏஙͱͯ͠ Micronaut ͪΖΜɺΤσΟλʔ JavaɺKotlin ͷΠϯ ετʔϧํ๏આ໌͍͖ͯ͠·͢ɻຊஶΛಡΊจࣈ௨ΓೖऴΘΓ·͢ɻͦ ͔͜ΒΦϦδφϧͰΞϓϦΛ࡞ͬͯΈΔͷΑ͠ɺଞͷϑϨʔϜϫʔΫʹೖ͠ ͯΈΔͷΑ͠ɺΕΔࣄແݶେͰ͢ɻ ͳ͓ɺೖ͚ͱ͍͏ࣄͰຊ֨తʹۀͰ Micronaut Λ༻͍ͯ͠Δਓʹͱͬ ͯΓͳ͍͔͠Ε·ͤΜɻͦ͏ݴͬͨํͥͻࣗ͝ͰΞτϓοτ͞Ε ͯΈ͍͔͕ͯͰ͠ΐ͏͔ɻೖ͗͢Δͱࢥ͏ͷͰ͋ΕಡΈ͔ͨͬͨͷʹॻ͔ Ε͍ͯͳ͍߲͕۩ମతʹΠϝʔδͰ͖͍ͯΔͣͰ͢ɻ೦ͳ͕Βචऀͦ͜ ·Ͱߦ͖ண͚͍ͯͳ͍ͷͰɺͥͻޙֶͷͨΊʹಡΜͰΈ͍ͨͰ͢ɻͥͻصͷ͜ ͪΒଆɺαʔΫϧࢀՃͯ͠Έ·ͤΜ͔? 2
ͲΜͳਓ͚͔ ຊஶ Micronaut Kotlin ʹڵຯ͕͋ΔɺKotlin Ͳ͜Ζ͔ϓϩάϥϜະܦݧ ͚ͩͲԿ͔ͬͯΈ͍ͨɺόοΫΤϯυʹೖͯ͠Έ͍ͨͳͲओʹೖॻͱͯ͠ ॳ৺ऀ͚ʹॻ͔Ε͍ͯ·͢ɻͪΖΜɺ͢Ͱʹ Spring
Boot Ktor ͳͲଞͷ ϑϨʔϜϫʔΫΛ৮ͬͨ͜ͱ͕͋ΓผͷϑϨʔϜϫʔΫΛ৮ͬͯΈ͍ͨͱ͍͏ํ ʹ͓קΊͰ͢ɻ ຊஶͰհͨ͠खॱͷ௨Γʹ͢Εɺίʔυίϐϖ͢Εಈ͘Α͏ʹͳͬ ͍ͯ·͢ͷͰɺͱΓ͋͑ͣಈ͔͍ͨ͠ͱ͍͏ํʹ҆৺Ͱ͢ɻ·ͨɺOS ͱͯ͠ WindowsɺMac ྆ରԠͰ͋ΓɺΤσΟλ Intellij IDEAɺVS Code ͷ྆ํ ʹରԠ͍ͯ͠·͢ɻ͓ख࣋ͪͷڥɺ͓͖ͳΤσΟλͰ͓ࢼ͍ͩ͘͠͞ɻ ͜ͷຊͰಘΒΕΔ͜ͱ ຊஶΛಡΈऴΘΔͱ࣍ͷΑ͏ͳঢ়ଶʹͳΓ·͢ɻ • Micronaut ͕ͳΜͳͷ͔͔Δ • Windows ·ͨ Mac Ͱ Micronaut ͷڥߏங͕Ͱ͖Δ • ࣮ࡍʹίʔυΛॻ͖ϩʔΧϧͰαʔόʔαΠυ Kotlin ʹΑΔ API αʔ όʔΛߏஙͰ͖Δ • API Λ࣮Ͱ͖Δ ͋ͳͨͷ Kotlin Ͱ Web ΞϓϦέʔγϣϯͷόοΫΤϯυΛ࡞Γ͍ͨɺ৽͍͠ ϑϨʔϜϫʔΫʹ৮ͬͯΈ͍ͨͱ͍͏ࢥ͍ʹԠ͑ΒΕͨͷͳΒɺ͜Μͳʹخ͍͠ ͜ͱ͋Γ·ͤΜɻ ͜ͷຊͰղઆ͠ͳ͍͜ͱ ຊஶͰ Micronaut ͷղઆΛ͍ͯ͠·͕͢ɺ͋͘·Ͱ͍ํͷΈͰ͋Γৄࡉͳ Έιʔείʔυͷதʹ͍ͭͯղઆ͍ͯ͠·ͤΜɻ ·ͨɺKotlin ͱ͍͏ϓϥάϥϛϯάݴޠͦͷͷʹ͍ͭͯৄࡉઆ໌͓ͯ͠ Γ·ͤΜɻಉ༷ʹ Web ΞϓϦέʔγϣϯʹ͍ͭͯৄࡉͳղઆ͍ͯ͠·ͤΜ ͷͰɺͦͷ͋ͨΓͷ Web γεςϜ։ൃͷجૅʹؔ͢ΔΈղઆ·ͨผͷ ػձͱͳΓ·͢ɻͦͷଞɺGradle ʹ͍ͭͯ༻͍ͯ͠·͕͢ղઆ͓ͯ͠Γ· ͤΜɻ ͜ͷຊͷ͍ํ ຊॻ͜ͷຊͷͱ͓ΓʹΕ Micronaut Λ༻ͨ͠αʔόʔαΠυ Kotlin Ͱ API ͕ಈ͘ͱ͍͏ͱ͜ΖΛࢦͯ͠ॻ͔Ε͍ͯ·͢ɻ͜ͷຊΛಡΊཧ۶ 3
Έ͕ͯ͢ཧղͰ͖ΔΑ͏ʹॻ͔Ε͍ͯ·ͤΜɻ͜ͷຊΛೖΓޱͱͯ͠͞ ΒʹͦͷԞʹ͋Δ͜ͱʹڵຯΛ͍͚࣋ͬͯͨͩͨΒ͍Ͱ͢ɻ جຊతʹ಄͔ΒಡΈਐΊ͍͚͍͍ͯͰ͕͢ɺ͍͖ͳΓίʔυΛݟ͍ͨͱ͍͏ ํ࠷ॳͷํඈ͍͍ͯͨͩͯ͠େৎͰ͢ɻ ಡΈऴΘͬͨײؒҧ͍ͷࢦఠɺՃཁͳͲ࣍ͷϋογϡλάΛ༻͍ͯ Twitter Ͱᄁ͍͍͚ͯͨͩΔͱخ͍͠Ͱ͢ɻͥͻɺײΛ͓͓ͪͯ͠Γ·͢ɻ #MicronautͰೖ!࣮ફ!αʔόʔαΠυKotlin ໔ࣄ߲ ຊॻʹهࡌ͢Δ༰චऀͷॴଐ͢Δ৫ͷެࣜݟղͰ͋Γ·ͤΜɻ
·ͨɺຊॻՄೳͳݶΓਖ਼֬Λظ͢Α͏ʹΊ͍ͯ·͕͢ɺචऀ͕ͦͷ༰Λ อূ͢ΔͷͰ͋Γ·ͤΜɻͦͷͨΊɺຊॻͷهࡌ༰ʹج͍ͮͨಡऀͷߦҝɺ ٴͼಡऀ͕ඃͬͨଛʹ͍ͭͯචऀͳΜΒΛෛ͏ͷͰ͋Γ·ͤΜɻ 4
࣍ ͡Ίʹ 2 ຊஶͷ༰ . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ͲΜͳਓ͚͔ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ͜ͷຊͰಘΒΕΔ͜ͱ . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ͜ͷຊͰղઆ͠ͳ͍͜ͱ . . . . . . . . . . . . . . . . . . . . . . . . 3 ͜ͷຊͷ͍ํ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ໔ࣄ߲ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 ୈ 1 ষ Micronaut ͱ? 7 1.1 Micronaut ͷར༻࣮ . . . . . . . . . . . . . . . . . . . . . . 8 1.2 ຊஶͰհ͍ͯ͠Δαϯϓϧίʔυʹ͍ͭͯ . . . . . . . . . . . 8 ୈ 2 ষ ڥߏங 9 2.1 Java ͷΠϯετʔϧ . . . . . . . . . . . . . . . . . . . . . . . 10 Mac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2 ΤσΟλͷ४උ . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Mac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.3 Kotlin ͷΠϯετʔϧ . . . . . . . . . . . . . . . . . . . . . . 13 Mac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.4 Micronaut ͷΠϯετʔϧ . . . . . . . . . . . . . . . . . . . . 14 Mac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 ୈ 3 ষ Micronaut Ͱೖ!αʔόʔαΠυ Kotlin 16 3.1 ΞϓϦͷ࡞ . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 8080 ϙʔτҙ֎ͱΘΕ͍ͯΔ . . . . . . . . . . . . . . . . 18 3.2 API ΤϯυϙΠϯτΛ࣮͢Δ . . . . . . . . . . . . . . . . . . 18 ୈ 4 ষ ࣮ફͦͷ 1 GET Ҏ֎ͷ HTTP ϝιουΛ࣮ͯ͠ΈΔ 20 5
4.1 GET . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . 20 4.2 PUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.3 POST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.4 DELETE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 ୈ 5 ষ ࣮ફͦͷ 2 ύϥϝʔλΛૹΔ 24 5.1 ΫΤϦύϥϝʔλͷૹ৴ͱ֬ೝ . . . . . . . . . . . . . . . . . . 24 ෳͷΫΤϦύϥϝʔλ . . . . . . . . . . . . . . . . . . . . . 25 5.2 ϦΫΤετϘσΟͷૹ৴ . . . . . . . . . . . . . . . . . . . . . 25 ୈ 6 ষ ࣮ફͦͷ 3 H2 Ͱσʔλϕʔεૢ࡞Λ࣮ͯ͠ΈΔ 27 6.1 H2 ͱ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 6.2 H2 ͷ͓ࢼ͠ . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 6.3 ҙͷύϥϝʔλΛొ͢Δ . . . . . . . . . . . . . . . . . . . 30 6.4 ߋ৽ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 6.5 আ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ୈ 7 ষ ࣮ફͦͷ 4 ୯ମςετ 33 7.1 API ͷ୯ମςετ . . . . . . . . . . . . . . . . . . . . . . . . . 33 ϦΫΤετύϥϝʔλ͋Γͷςετ . . . . . . . . . . . . . . . . 36 ୈ 8 ষ ࣮ફͦͷ 5 Micronaut ͷґଘੑೖʹ͍ͭͯ 38 8.1 Ͳͷґଘੑೖํ๏͕ྑ͍ͷ͔? . . . . . . . . . . . . . . . . . 39 8.2 ίϯετϥΫλΠϯδΣΫγϣϯʹॻ͖͑Δ . . . . . . . . . . 39 ୈ 9 ষ ࣮ફͦͷ 6 ୯ମςετͷվળ 41 9.1 ςετ༻ࣄલσʔλͷ४උ . . . . . . . . . . . . . . . . . . . . 41 9.2 ୯ମςετͷՃ . . . . . . . . . . . . . . . . . . . . . . . . . 42 A ͜Ε͔Βͷ Micronaut ࣮ફʹ͍ͭͯ 44 ͋ͱ͕͖ 45 ిࢠ൛ʹ͍ͭͯ 46 ஶऀհ 47 จষ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Πϥετ୲ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 6