Spring for GraphQLって実際どうなの？〜小規模スタートアップの事例紹介〜

Spring for GraphQL࣮ͬͯࡍͲ͏ͳͷʁ ʙখن໛ελʔτΞοϓͰͷࣄྫ঺հʙ Crewwגࣜձࣾ ݹլ ༐ࢤ 2025/06/07 JJUG CCC
2025 Spring

ࣗݾ঺հ ॴଐɿCrewwגࣜձࣾ ໊લɿݹլ ༐ࢤ 𝕏 ɿ@yushi_koga Githubɿkogayushi ओઓ৔͸αʔόαΠυKotlin ΠϯϑϥʢAWSʣ΋୲౰

ࠓ೔࿩͢͜ͱ 1.REST APIʹฐ͕ࣾײ͍ͯͨ͡՝୊ 2.GraphQLͰͦΕΛͲ͏ղܾͰ͖Δͷ͔ 3.Spring for GraphQLͷ࣮૷ʹ͍ͭͯ • QueryΛྫʹίϯτϩʔϥʔͷ࣮૷ํ๏ͷ঺հ •
Subscriptionͷ࣮૷Ͱ೉͍͠ͱ͜Ζ

REST APIʹฐ͕ࣾײ͍ͯͨ͡՝୊

ΫϥΠΞϯταΠυ͔ αʔόʔαΠυ͔ ͲͪΒ͔ʹ࣮૷ͷෛ୲͕ภΔ REST APIʹฐ͕ࣾײ͍ͯͨ͡՝୊

ͲΜͳ࡞ΓํΛͯͯ͠՝୊Λײͨ͡ͷ͔ʁ

େผ͢Δͱ͜ͷ2ͭ 1.Ϧιʔεࢦ޲ 2.Ϣʔεέʔεࢦ޲ ͲΜͳ࡞Γํʁ REST APIΛ࡞Δͱ͖ͷઓུ

Ϧιʔεࢦ޲ͳREST APIͱ͸ʁ ͦͷ՝୊͸ʁ

ର৅Ϧιʔεࣗ਎ͷଐੑͷΈΛฦ͢ɻ ؔ࿈Ϧιʔε͸ฦ͞ͳ͍ɻ ฦͨ͠ͱͯ͠΋IDͳͲඞཁ࠷খݶɻ Ϧιʔεࢦ޲ͳREST APIͱ͸ʁ

Article ├ id ├ title  ├ content └ authorUserId User
├ id └ name Ϧιʔεࢦ޲ͳREST APIͱ͸ʁ GET /articles/{articleId} GET /users/{userId} ˢผ్ɺऔಘ͢Δ ྫ͑͹ɺهࣄͱͦͷ౤ߘऀ͕औΓ͍ͨͱ͖ ˢ"SUJDMFͷଐੑͷΈฦ͢ ɹ"VUIPS 6TFS ͸ؚΊͳ͍

Ϧιʔεࢦ޲ͳREST APIͷ՝୊ ΫϥΠΞϯτ͕REST APIΛݺͼग़͢ճ਺͕૿͑ɺ ΫϥΠΞϯτଆͷ࣮૷޻਺͕૿͑Δ

Ϣʔεέʔεࢦ޲ͳREST APIͱ͸ʁ ͦͷ՝୊͸ʁ

ର৅Ϧιʔεͱؔ࿈͕͋ΔϦιʔε΋ Ϣʔεέʔε্ඞཁͳΒҰॹʹฦ͢ Ϣʔεέʔεࢦ޲ͳREST APIͱ͸ʁ

Article ├ id ├ title  ├ content └ User ├
id └ name GET /articles/{articleId} Ϣʔεέʔεࢦ޲ͳREST APIͱ͸ʁ ˡର৅Ϧιʔεͱؔ࿈ͷ͋ΔϦιʔε΋ฦ͢ ྫ͑͹ɺهࣄͱͦͷ౤ߘऀ͕औΓ͍ͨͱ͖

Ϣʔεέʔεࢦ޲ͳREST APIͷ՝୊ REST APIαʔόʔʹؔ࿈ϦιʔεΛ·ͱΊͯऔಘͯ͠ฦ͢ ॲཧ͕ඞཁʹͳΓɺαʔόʔαΠυͷ࣮૷޻਺͕૿͑Δ

Ͳ͏΍ͬͯղܾ͢Δ͔ʁ

Ͳ͏΍ͬͯղܾ͢Δ͔ Ϧιʔεࢦ޲Ͱ࡞ͬͨͱ͖ͱ Ϣʔεέʔεࢦ޲Ͱ࡞ͬͨͱ͖ͷ ྑ͍ͱ͜औΓ͕Ͱ͖ͨΒ͍͍ͷͰ͸ʁ

ͨ·ͨ·ग़ձͬͨSpring for GraphQL ͳΜͯݴޠԽ͸Ͱ͖ͯͳ͔͚ͬͨͲɺ Spring for GraphQL͕GAʹͳͬͨͷͰɺ খن໛Ҋ݅Ͱࢼͯ͠Έͨ

՝୊ΛղܾͰ͖Δ͔΋ʂ Spring for GraphQL͸ Ϧιʔεࢦ޲Ͱ࡞ͬͨͱ͖ͱ Ϣʔεέʔεࢦ޲Ͱ࡞ͬͨͱ͖ͷ ྑ͍ͱ͜औΓ͕Ͱ͖ͦ͏ͬͯࢥͬͨ

GraphQLͱ͸Կ͔ ͲͷΑ͏ʹͯ͠՝୊Λղܾ͢Δͷ͔

GraphQLͱ͸Կ͔ʁ

GraphQLͱ͸Կ͔ʁ GraphQL͸APIͷͨΊͷΫΤϦݴޠ ΫΤϦΛ࣮ߦͯ͠σʔλऔಘ͢ΔͨΊͷϥϯλΠϜ

GraphQLͱ͸Կ͔ʁ ΫΤϦݴޠͷଆ໘ͱ ϥϯλΠϜͷଆ໘Λ ෼͚ͯߟ͑Δ

APIͷͨΊͷΫΤϦݴޠʁ ʢԿ͕ݴ͍͍ͨͷ͔Α͘Θ͔Βͳ͍🤔❓ʣ

ΫΤϦݴޠʹ࢓༷ͱಡΈସ͑Α͏

GraphQLͷ࢓༷ͱ͸ʁ GraphQL͸ͲͷΑ͏ͳάϥϑߏ଄͕ଘࡏ͢Δ͔ͱɺ ͦͷάϥϑʹͲͷΑ͏ͳૢ࡞͕ ڐՄ͞Ε͍ͯΔ͔Λఆٛ͢ΔͨΊͷ࢓༷ ͦͷ࢓༷ͷදݱखஈ͕εΩʔϚఆٛ

͡Ό͋ɺϥϯλΠϜ͸ʁ

GraphQLͷϥϯλΠϜͱ͸ʁ ࣮ߦ؀ڥʹSpring for GraphQL

GraphQLͱSpring for GraphQLͱ ࢲୡ͕࣮૷͢ΔՕॴͷؔ܎ੑΛՄࢹԽͯ͠ΈΔ

ίϯτϩʔϥʔ ίϯτϩʔϥʔ ίϯτϩʔϥʔ ΤϯςΟςΟ ΤϯςΟςΟ ΤϯςΟςΟ GraphQLͱSpring for GraphQLͱ ࢲୡ͕࣮૷͢ΔՕॴͷؔ܎ੑΛՄࢹԽͯ͠ΈΔ

GraphQL͸REST APIͷ՝୊Λ Ͳ͏ղܾͰ͖Δͷ͔

REST APIʹฐ͕ࣾײ͍ͯͨ͡՝୊ Ϧιʔεࢦ޲ ΫϥΠΞϯτ͕REST APIΛݺͼग़͢ճ਺͕૿͑ɺ ΫϥΠΞϯτଆͷ࣮૷޻਺͕૿͑Δ Ϣʔεέʔεࢦ޲ REST APIαʔόʔʹؔ࿈ϦιʔεΛ·ͱΊͯऔಘͯ͠ฦ͢ ॲཧ͕ඞཁʹͳΓɺαʔόʔαΠυͷ࣮૷޻਺͕૿͑Δ

ίϯτϩʔϥʔ ίϯτϩʔϥʔ ίϯτϩʔϥʔ ΤϯςΟςΟ ΤϯςΟςΟ ΤϯςΟςΟ ՝୊ΛͲ͏ղܾͰ͖Δͷ͔ هࣄͷλΠτϧͱͦͷ౤ߘ໊Λऔಘ͢Δ

ίϯτϩʔϥʔ ίϯτϩʔϥʔ ίϯτϩʔϥʔ ΤϯςΟςΟ ΤϯςΟςΟ ΤϯςΟςΟ ՝୊ΛͲ͏ղܾͰ͖Δͷ͔ هࣄͷλΠτϧͱίϝϯτͱͦͷ౤ߘऀ໊Λऔಘ͢Δ

query articlesWithComments { articles { title comments { content author
{ name } } } } 1.৽ணهࣄʢλΠτϧʣͱ౤ߘͨ͠Ϣʔβʔ໊͕΄͍͠ 2.هࣄͷλΠτϧҰཡͱɺ͍ͭͨίϝϯτͱͦͷ౤ߘऀ΋஌Γ͍ͨ ϢʔεέʔεʹԠͨ͡ΫΤϦΛॻ͚ͩ͘ query fetchNewBlogForTopPage { articles { title author { name } } }

{ name } } } } 1.৽ணهࣄʢλΠτϧʣͱ౤ߘͨ͠Ϣʔβʔ໊͕΄͍͠ 2.هࣄͷλΠτϧҰཡͱɺ͍ͭͨίϝϯτͱͦͷ౤ߘऀ΋஌Γ͍ͨ ϢʔεέʔεʹԠͨ͡ΫΤϦΛॻ͚ͩ͘ query fetchNewBlogForTopPage { articles { title author { name } } } ˡهࣄʢλΠτϧʣͷҰཡ

{ name } } } } 1.৽ணهࣄʢλΠτϧʣͱ౤ߘͨ͠Ϣʔβʔ໊͕΄͍͠ 2.هࣄͷλΠτϧҰཡͱɺ͍ͭͨίϝϯτͱͦͷ౤ߘऀ΋஌Γ͍ͨ ϢʔεέʔεʹԠͨ͡ΫΤϦΛॻ͚ͩ͘ query fetchNewBlogForTopPage { articles { title author { name } } } ˡهࣄʢλΠτϧʣͷҰཡ ˡ౤ߘͨ͠Ϣʔβʔ໊

{ name } } } } 1.৽ணهࣄʢλΠτϧʣͱ౤ߘͨ͠Ϣʔβʔ໊͕΄͍͠ 2.هࣄͷλΠτϧҰཡͱɺ͍ͭͨίϝϯτͱͦͷ౤ߘऀ΋஌Γ͍ͨ ϢʔεέʔεʹԠͨ͡ΫΤϦΛॻ͚ͩ͘ query fetchNewBlogForTopPage { articles { title author { name } } } ˡهࣄͷλΠτϧͷҰཡ

{ name } } } } 1.৽ணهࣄʢλΠτϧʣͱ౤ߘͨ͠Ϣʔβʔ໊͕΄͍͠ 2.هࣄͷλΠτϧҰཡͱɺ͍ͭͨίϝϯτͱͦͷ౤ߘऀ΋஌Γ͍ͨ ϢʔεέʔεʹԠͨ͡ΫΤϦΛॻ͚ͩ͘ query fetchNewBlogForTopPage { articles { title author { name } } } ˡهࣄͷλΠτϧͷҰཡ ˡ͍ͭͨίϝϯτ

{ name } } } } 1.৽ணهࣄʢλΠτϧʣͱ౤ߘͨ͠Ϣʔβʔ໊͕΄͍͠ 2.هࣄͷλΠτϧҰཡͱɺ͍ͭͨίϝϯτͱͦͷ౤ߘऀ΋஌Γ͍ͨ ϢʔεέʔεʹԠͨ͡ΫΤϦΛॻ͚ͩ͘ query fetchNewBlogForTopPage { articles { title author { name } } } ˡهࣄͷλΠτϧͷҰཡ ˡ͍ͭͨίϝϯτ ˡίϝϯτͷ౤ߘऀ

Ͳ͏ղܾ͔ͨ͠ Ϧιʔεࢦ޲ ΫϥΠΞϯτ͕REST APIΛݺͼग़͢ճ਺͕૿͑ɺ ΫϥΠΞϯτଆͷ࣮૷޻਺͕૿͑Δ Ϣʔεέʔεࢦ޲ REST APIαʔόʔʹؔ࿈ϦιʔεΛ·ͱΊͯऔಘͯ͠ฦ͢ॲ ཧ͕ඞཁʹͳΓɺαʔόʔαΠυͷ࣮૷޻਺͕૿͑Δ

Ͳ͏ղܾ͔ͨ͠ Ϧιʔεࢦ޲ ΫϥΠΞϯτ͕REST APIΛݺͼग़͢ճ਺͕૿͑ɺ ΫϥΠΞϯτଆͷ࣮૷޻਺͕૿͑Δ ɹˠΫΤϦΛҰճݺͼग़͚ͩ͢Ͱ͢Μͩ Ϣʔεέʔεࢦ޲ REST APIαʔόʔʹؔ࿈ϦιʔεΛ·ͱΊͯऔಘͯ͠ฦ͢ॲ ཧ͕ඞཁʹͳΓɺαʔόʔαΠυͷ࣮૷޻਺͕૿͑Δ

ίϯτϩʔϥʔ ίϯτϩʔϥʔ ίϯτϩʔϥʔ ΤϯςΟςΟ ΤϯςΟςΟ ΤϯςΟςΟ ੺͍ઢͱਤͷͱ͜ΖΛҰ౓࣮૷͢Ε͹ ϢʔεέʔεͷόϦΤʔγϣϯʢΫΤϦʣʹԠͨ͡ ݸผͷ࣮૷͕͍Βͳ͍

Ͳ͏ղܾ͔ͨ͠ Ϧιʔεࢦ޲ ΫϥΠΞϯτ͕REST APIΛݺͼग़͢ճ਺͕૿͑ɺ ΫϥΠΞϯτଆͷ࣮૷޻਺͕૿͑Δ ɹˠΫΤϦΛҰճݺͼग़͚ͩ͢Ͱ͢Μͩ Ϣʔεέʔεࢦ޲ REST APIαʔόʔʹؔ࿈ϦιʔεΛ·ͱΊͯऔಘͯ͠ฦ͢ॲ ཧ͕ඞཁʹͳΓɺαʔόʔαΠυͷ࣮૷޻਺͕૿͑Δ
→ΫΤϦΛΤοδΛ࣮૷͢Ε͹ɺͦΕҎ্ͷ޻਺͸ෆཁ

Spring for GraphQLͷ࣮૷ํ๏

εΩʔϚͷॻ͖ํ UZQF2VFSZ\ BSUJDMFT<"SUJDMF> BSUJDMF BSUJDMF*E*% "SUJDMF ^ UZQF.VUBUJPO\ QPTU"SUJDMF JOQVU"SUJDMF*OQVU
"SUJDMF ^ UZQF4VCTDSJQUJPO\ VQEBUFE"SUJDMFT BSUJDMF*ET<*%> "SUJDMF ^ JOQVU"SUJDMF*OQVU\ DPOUFOU4USJOH UJUMF4USJOH ^ UZQF"SUJDMF\ BVUIPS6TFS DPNNFOUT<$PNNFOU> DPOUFOU4USJOH JE*% MJLFE#Z<6TFS> UJUMF4USJOH ^

UZQF2VFSZ\ BSUJDMFT<"SUJDMF> BSUJDMF BSUJDMF*E*% "SUJDMF ^ UZQF.VUBUJPO\ QPTU"SUJDMF JOQVU"SUJDMF*OQVU "SUJDMF
^ UZQF4VCTDSJQUJPO\ VQEBUFE"SUJDMFT BSUJDMF*ET<*%> "SUJDMF ^ JOQVU"SUJDMF*OQVU\ DPOUFOU4USJOH UJUMF4USJOH ^ UZQF"SUJDMF\ BVUIPS6TFS DPNNFOUT<$PNNFOU> DPOUFOU4USJOH JE*% MJLFE#Z<6TFS> UJUMF4USJOH ^ ˡJOQVU͸ೖྗ εΩʔϚͷॻ͖ํ

^ UZQF4VCTDSJQUJPO\ VQEBUFE"SUJDMFT BSUJDMF*ET<*%> "SUJDMF ^ JOQVU"SUJDMF*OQVU\ DPOUFOU4USJOH UJUMF4USJOH ^ UZQF"SUJDMF\ BVUIPS6TFS DPNNFOUT<$PNNFOU> DPOUFOU4USJOH JE*% MJLFE#Z<6TFS> UJUMF4USJOH ^ ˡJOQVU͸ೖྗ ˡzz͸ඞਢ εΩʔϚͷॻ͖ํ

^ UZQF4VCTDSJQUJPO\ VQEBUFE"SUJDMFT BSUJDMF*ET<*%> "SUJDMF ^ JOQVU"SUJDMF*OQVU\ DPOUFOU4USJOH UJUMF4USJOH ^ UZQF"SUJDMF\ BVUIPS6TFS DPNNFOUT<$PNNFOU> DPOUFOU4USJOH JE*% MJLFE#Z<6TFS> UJUMF4USJOH ^ ˡUZQF͸ग़ྗ εΩʔϚͷॻ͖ํ

^ UZQF4VCTDSJQUJPO\ VQEBUFE"SUJDMFT BSUJDMF*ET<*%> "SUJDMF ^ JOQVU"SUJDMF*OQVU\ DPOUFOU4USJOH UJUMF4USJOH ^ UZQF"SUJDMF\ BVUIPS6TFS DPNNFOUT<$PNNFOU> DPOUFOU4USJOH JE*% MJLFE#Z<6TFS> UJUMF4USJOH ^ ˡUZQF͸ग़ྗ ˢz<>z͸഑ྻ εΩʔϚͷॻ͖ํ

^ UZQF4VCTDSJQUJPO\ VQEBUFE"SUJDMFT BSUJDMF*ET<*%> "SUJDMF ^ JOQVU"SUJDMF*OQVU\ DPOUFOU4USJOH UJUMF4USJOH ^ UZQF"SUJDMF\ BVUIPS6TFS DPNNFOUT<$PNNFOU> DPOUFOU4USJOH JE*% MJLFE#Z<6TFS> UJUMF4USJOH ^ ˡUZQF͸ग़ྗ ˢz<>z͸഑ྻ ˡzz͸/PU/VMM εΩʔϚͷॻ͖ํ

^ UZQF4VCTDSJQUJPO\ VQEBUFE"SUJDMFT BSUJDMF*ET<*%> "SUJDMF ^ JOQVU"SUJDMF*OQVU\ DPOUFOU4USJOH UJUMF4USJOH ^ UZQF"SUJDMF\ BVUIPS6TFS DPNNFOUT<$PNNFOU> DPOUFOU4USJOH JE*% MJLFE#Z<6TFS> UJUMF4USJOH ^ ˣUZQF2VFSZͱͯ͠ఆٛ εΩʔϚͷॻ͖ํ

^ UZQF4VCTDSJQUJPO\ VQEBUFE"SUJDMFT BSUJDMF*ET<*%> "SUJDMF ^ JOQVU"SUJDMF*OQVU\ DPOUFOU4USJOH UJUMF4USJOH ^ UZQF"SUJDMF\ BVUIPS6TFS DPNNFOUT<$PNNFOU> DPOUFOU4USJOH JE*% MJLFE#Z<6TFS> UJUMF4USJOH ^ ˣUZQF2VFSZͱͯ͠ఆٛ ˡҾ਺ΛࢦఆՄ εΩʔϚͷॻ͖ํ

αϯϓϧίʔυͱͦͷٕज़ελοΫ ಈ͘αϯϓϧίʔυ • https://github.com/kogayushi/spring-for-graphql-tips-by-small-startup ݴޠɿ Kotlin 2.0.21 ϑϨʔϜϫʔΫɿ Spring Boot
3.4.4 • Spring for GraphQL • Spring MVC

Query࣮૷ྫ

type Query { article( articleId: ID! ): Article } type
Article { id: ID! title: String! content: String! author: User! comments: [Comment!]! } @Controller class ArticleGraphQLController( private val fetchArticles: FetchArticles, ) { @QueryMapping fun article( @Argument articleId : UUID ): Article? { val articles = fetchArticleByArticleId.handle(articleId) return article?.toArticleDto() } } data class Article( val id: UUID, val title: String, val content: String, val authorId: UUID, ) Query࣮૷ྫɿQueryͷϚοϐϯάϧʔϧ

type Query { article( articleId: ID! ): Article } type
Article { id: ID! title: String! content: String! author: User! comments: [Comment!]! } @Controller class ArticleGraphQLController( private val fetchArticles: FetchArticles, ) { @QueryMapping fun article( @Argument articleId : UUID ): Article? { val articles = fetchArticleByArticleId.handle(articleId) return article?.toArticleDto() } } data class Article( val id: UUID, val title: String, val content: String, val authorId: UUID, ) Query࣮૷ྫɿQueryͷϚοϐϯάϧʔϧ ˢ!2VFSZ.BQQJOH͕͍͍ͭͯΔ ಉ໊ͷϝιουʹϚοϐϯά

@Controller class ArticleGraphQLController( private val fetchArticles: FetchArticles, ) { @QueryMapping
fun article( @Argument articleId : UUID ): Article? { val articles = fetchArticleByArticleId.handle(articleId) return article?.toArticleDto() } } data class Article( val id: UUID, val title: String, val content: String, val authorId: UUID, ) type Query { article( articleId: ID! ): Article } type Article { id: ID! title: String! content: String! author: User! comments: [Comment!]! } Query࣮૷ྫɿҾ਺ͷϚοϐϯάϧʔϧ ˢ!"SHVNFOU͕͍͍ͭͯΔ ɹಉ໊ͷҾ਺ʹϚοϐϯά

fun article( @Argument articleId : UUID ): Article? { val articles = fetchArticleByArticleId.handle(articleId) return article?.toArticleDto() } } data class Article( val id: UUID, val title: String, val content: String, val authorId: UUID, ) type Query { article( articleId: ID! ): Article } type Article { id: ID! title: String! content: String! author: User! comments: [Comment!]! } Query࣮૷ྫɿฦΓ஋ͷϚοϐϯάϧʔϧ ฦΓ஋ͷܕఆٛ

fun article( @Argument articleId : UUID ): Article? { val articles = fetchArticleByArticleId.handle(articleId) return article?.toArticleDto() } } data class Article( val id: UUID, val title: String, val content: String, val authorId: UUID, ) type Query { article( articleId: ID! ): Article } type Article { id: ID! title: String! content: String! author: User! comments: [Comment!]! } Query࣮૷ྫɿฦΓ஋ͷϚοϐϯάϧʔϧ εΩʔϚͰఆٛͨ͠ϑΟʔϧυ໊ͱ %50ಉ໊ͷϓϩύςΟ͕Ϛοϐϯά͞ΕΔ

fun article( @Argument articleId : UUID ): Article? { val articles = fetchArticleByArticleId.handle(articleId) return article?.toArticleDto() } } data class Article( val id: UUID, val title: String, val content: String, val authorId: UUID, ) type Query { article( articleId: ID! ): Article } type Article { id: ID! title: String! content: String! author: User! comments: [Comment!]! } Query࣮૷ྫɿฦΓ஋ͷϚοϐϯάϧʔϧ ˢϚοϐϯά͞Εͯͳ͍ɺ͜ͷϑΟʔϧυ͸&EHF

Edge࣮૷ྫ

Edge࣮૷ྫɿEdgeͷϚοϐϯάϧʔϧ @Controller class CommentGraphQLController( private val fetchComments: FetchComments, ) {
@BatchMapping(field = "comments") fun commentsOfArticle(articles: List<Article>): Map<Article, List<Comment>> { val articleIds = articles.map { it.id } val comments = fetchComments.handle( FetchCommentsInputData(articleIds) ) return articles.associateWith { val articleComments = comments .filter { comment -> comment.articleId == it.id } articleComments.map { it.toCommentDto() } } } } type Article { id: ID! title: String! content: String! author: User! comments: [Comment!]! } type User { id: ID! name: String! articles: [Article!]! comments: [Comment!]! }

@BatchMapping(field = "comments") fun commentsOfArticle(articles: List<Article>): Map<Article, List<Comment>> { val articleIds = articles.map { it.id } val comments = fetchComments.handle( FetchCommentsInputData(articleIds) ) return articles.associateWith { val articleComments = comments .filter { comment -> comment.articleId == it.id } articleComments.map { it.toCommentDto() } } } } type Article { id: ID! title: String! content: String! author: User! comments: [Comment!]! } type User { id: ID! name: String! articles: [Article!]! comments: [Comment!]! } ɹɹɹɹɹɹɹɹɹˢ ΤοδͷϑΟʔϧυ໊ͱ Ξϊςʔγϣϯʹࢦఆͨ͠ϑΟʔϧυ໊ͱ Ҿ਺ͷํ͕Ұக͢ΔϝιουʹϚοϐϯά

@BatchMapping(field = "comments") fun commentsOfArticle(articles: List<Article>): Map<Article, List<Comment>> { val articleIds = articles.map { it.id } val comments = fetchComments.handle( FetchCommentsInputData(articleIds) ) return articles.associateWith { val articleComments = comments .filter { comment -> comment.articleId == it.id } articleComments.map { it.toCommentDto() } } } } type Article { id: ID! title: String! content: String! author: User! comments: [Comment!]! } ϝιουͷҾ਺ʹɺؔ࿈ݩϊʔυͷ-JTU͕Θͨͬͯ͘Δˢ

@BatchMapping(field = "comments") fun commentsOfArticle(articles: List<Article>): Map<Article, List<Comment>> { val articleIds = articles.map { it.id } val comments = fetchComments.handle( FetchCommentsInputData(articleIds) ) return articles.associateWith { val articleComments = comments .filter { comment -> comment.articleId == it.id } articleComments.map { it.toCommentDto() } } } } type Article { id: ID! title: String! content: String! author: User! comments: [Comment!]! } ίϝϯτΛऔಘͯ͠ɺ औಘϊʔυͱಥ͖߹Θͤͯˠ .BQʹͨ͠΋ͷΛฦ͢

Subscriptionͷ࣮૷Ͱ೉͍͠ͱ͜Ζ

Subscriptionͷ࣮૷Ͱ೉͍͠ͱ͜Ζ ReactorͷFluxΛ࢖͏લఏʹͳ͍ͬͯΔ

FluxΛ࢖͏લఏͩͱͳͥ೉͍͠ͷ͔ʁ • Spring Web fl uxͰ͸ͳ͘Spring MVCͰಈ͔ͤ͸͢Δ΋ͷͷ…

FluxΛ࢖͏લఏͩͱͳͥ೉͍͠ͷ͔ʁ • Spring Web fl uxͰ͸ͳ͘Spring MVCͰಈ͔ͤ͸͢Δ΋ͷͷ… • MVCɿखଓܕʢ໋ྩܕʣϓϩάϥϛϯά •
FluxɿReactiveʢ൓Ԡܕʣϓϩάϥϛϯά

FluxɿReactiveʢ൓Ԡܕʣϓϩάϥϛϯά ύϥμΠϜ͕ҧ͏

FluxɿReactiveʢ൓Ԡܕʣϓϩάϥϛϯά ύϥμΠϜͷؒͷ஥հ໾͕ඞཁ

FluxɿReactiveʢ൓Ԡܕʣϓϩάϥϛϯά ύϥμΠϜͷؒͷ஥հ໾͕ඞཁ ReactorͷSinks

FluxΛ࢖͏લఏͩͱͳͥ೉͍͠ͷ͔ʁ • Spring Web fl uxͰ͸ͳ͘Spring MVCͰಈ͔ͤ͸͢Δ΋ͷͷ… • FluxͱSinksͷษڧ͕ඞཁ

FluxΛ࢖͏લఏͩͱͳͥ೉͍͠ͷ͔ʁ • Spring Web fl uxͰ͸ͳ͘Spring MVCͰಈ͔ͤ͸͢Δ΋ͷͷ… • FluxͱSinksͷษڧ͕ඞཁ •
Sinksͷ࢖͍ํ͕೉͍͠

FluxΛ࢖͏લఏͩͱͳͥ೉͍͠ͷ͔ʁ • Spring Web fl uxͰ͸ͳ͘Spring MVCͰಈ͔ͤ͸͢Δ΋ͷͷ… • FluxͱSinksͷษڧ͕ඞཁ •
Sinksͷ࢖͍ํ͕೉͍͠ • ಉ࣌ʹemit͸Τϥʔ → εϨουηʔϑతͳ޻෉͕ඞཁ͔΋ʁ • BlockingQueueΛ࢖ͬͯɺඇಉظॲཧΛಉظॲཧʹมߋ • ϫʔΧʔεϨουͰQueue͔ΒऔΓग़ͯ̍݅ͣͭ͠emit • ಈ͘αϯϓϧίʔυʹ࣮૷ྫΛ༻ҙͨ͠ • https://github.com/kogayushi/spring-for-graphql-tips-by-small-startup

՝୊͸ղܾͰ͖ͨͷ͔ʁ Ϧιʔεࢦ޲ͷ՝୊ ΫϥΠΞϯτ͕REST APIΛݺͼग़͢ճ਺͕૿͑ɺ ΫϥΠΞϯτଆͷ࣮૷޻਺͕૿͑Δ ɹˠ ҰճͷΫΤϦݺͼग़͠ͰඞཁͳσʔλΛऔಘɿ🆗 Ϣʔεέʔεࢦ޲ͷ՝୊ REST APIαʔόʔʹؔ࿈ϦιʔεΛ·ͱΊͯऔಘͯ͠ฦ͢ॲཧ
͕ඞཁʹͳΓɺαʔόʔαΠυͷ࣮૷޻਺͕૿͑Δ ɹˠΫΤϦͱΤοδͷ࣮૷͢Δ͚ͩͰࡁΉɿ🆗

ϝϦοτ͸ʁ • ϑϩϯτΤϯυɺόοΫΤϯυͱ΋ʹ։ൃޮ཰͕޲্🆙 • ϑϩϯτΤϯυ͸σʔλಥ͖߹Θͤॲཧ͕ͳ͘ͳ࣮ͬͯ૷ྔ͕ݮͬͨ • όοΫΤϯυ͸࣮૷ର৅͕ݮΓɺ։ൃྔΛେ͖͘ݮΒͤͨ

σϝϦοτ͸ʁ • Subscriptionͷ࣮૷೉қ౓͕ߴ͍🙄 • ͜ͷ͋ͱ঺հ͢Δɺಈ͘αϯϓϧίʔυ͕ࢀߟʹͳΔ͔΋ʁ • ϝϯόʔͷܦݧ͕ઙ͍͏ͪ͸ɺEdgeͷݺͼग़͠ͰN+1໰୊සൃ͕ͪ͠🐢 • BatchMappingͷར༻ΛపఈΛపఈ͢Ε͹͋Δఔ౓ղܾ͢Δ •
ϑΝΠϧΞοϓϩʔυํ๏ͷਖ਼ղ͕ʢࠓͷͱ͜ΖʣΘ͔Βͳ͍🤷 • GraphQLʹ͸ϑΝΠϧΞοϓϩʔυͷ࢓༷͕ͳ͍ • ैདྷͷ΍ΓํͰ΍Δ͔͠ͳ͍ʁ໛ࡧத • εΩʔϚఆٛͷߋ৽࣌ɺࠩ෼Λ఻͑Δํ๏ʹ೰Ή • ·͍͍ͩ΍Γํ͕ࢥ͍͍ͭͯͳ͍ɺ໛ࡧத • ࠓ͸slackͰ౎౓ڞ༗ɺਓྗରॲ💪

ϦϑΝϨϯε • ϒϩάهࣄ 1.ංେԽ͢ΔεΩʔϚఆٛ΁ͷରॲํ๏ https://qiita.com/yushi_koga/items/f05a7b23b20e61aa1269 2.෦෼ߋ৽͍ͨ͠ https://qiita.com/yushi_koga/items/f749dd53e32fafb23eee 3.Mutationͷ໭Γ஋ͷํΛVoidʹ͢Δํ๏ https://qiita.com/yushi_koga/items/45b87eff5b40a5ec86f0 4.෼ࢄτϨʔγϯάͰGraphQLͷ۠ผΛ͚ͭΔํ๏
https://qiita.com/yushi_koga/items/8051f98e093dbbe8f51d • ಈ͘αϯϓϧίʔυ https://github.com/kogayushi/spring-for-graphql-tips-by-small-startup

Spring for GraphQL࣮ͬͯࡍͲ͏ͳͷʁ ʙখن໛ελʔτΞοϓͰͷࣄྫ঺հʙ Crewwגࣜձࣾ ݹլ ༐ࢤ 2025/06/07 JJUG CCC
2025 Spring

Spring for GraphQLって実際どうなの？〜小規模スタートアップの事例紹介〜

Spring for GraphQLって実際どうなの？〜小規模スタートアップの事例紹介〜

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