Coroutinesから紐解くKtorの仕組み / Revealing Ktor with coroutines

Coroutines͔Βඥղ͘ Ktorͷ࢓૊Έ Kotlin Fest 2019   08/24 (Sat.)   Recruit
Lifestyle. Yuji Koyano

ิ଍ w ͜ͷεϥΠυதͷ,UPSͷઆ໌͸  جຊతʹ4FSWFSTJEF,UPSͷΈΛର৅ͱ͍ͯ͠·͢ɻ  ͱ͸͍͑ɺ$MJFOU4JEF,UPSʹ΋ڞ௨͢Δ಺༰͸ଟ͍Ͱ͢ w ͜ͷεϥΠυதͷʮίϧʔνϯΛ࡞੒ɾ։࢝͢Δʯ͸  ޙड़͢ΔTUBSU$PSPVUJOFϝιου΍ͦͷྨࣅͷؔ਺Λ  ࣮ߦ͢Δɺͱ͍͏ҙຯͰ࢖͍ͬͯ·͢ɻ
w $PSPVUJOF͸+7.࣮૷Λର৅ͱ͍ͯ͠·͢

ࣗݾ঺հ

@bandwagondagon ykoyano Yuji Koyano @bandwagondagon ykoyano w 3FDSVJU-JGFTUZMFʹͯ  "OESPJEΤϯδχΞͱͯ͠  "JSϝΠτͱ͍͏ΞϓϦΛ։ൃத
w ࠷ۙ͸ɹɹ&OWPZ.PCJMFͰ༡ΜͰ͍·͢

Έͳ͞Μɺ,PUMJO͸ѪͰ͍ͯ·͔͢ʁ

༷ʑͳѪͰํ w "OESPJE w J04 ,PUMJO/BUJWF w +BWB4DSJQU w
4FWFS4JEF,PUMJO

w "OESPJE w J04 ,PUMJO/BUJWF w +BWB4DSJQU w 4FWFS4JEF,PUMJO
༷ʑͳѪͰํ

Ktorͱ͸ʁ w +FU#SBJOTࣾ੡ͷ044 w 4FSWFSαΠυͱ$MJFOUαΠυͷͭͷϓϩδΣΫτ͕͋Δ  4FSWFSܰྔͳ8FC"QQMJDBUJPO'SBNFXPSLΛఏڙ  $MJFOU"TZODISPOPVT)UUQ$MJFOUΛఏڙ w ,PUMJOݴޠͷػೳΛϑϧʹ׆༻͍ͯ͠Δͷ͕ಛ௃  FY$PSPVUJOFT
,PUMJO/BUJWF .VMUJQMBUGPSN

͜ͷηογϣϯͷ໨త w ,UPSͷઃܭ΍ಛ௃ɺࢥ૝ͳͲΛཧղ͢Δ͜ͱͰ  4FSWFS4*EF,PUMJOͱͯ͠ͷ,UPSͷਂ͍ཧղΛಘΔ w ,UPS͕$PSPVUJOFTΛ࢖ͬͯͲͷΑ͏ʹඇಉظ  ϓϩάϥϛϯάϞσϧΛ࣮ݱ͍ͯ͠Δͷ͔Λཧղ͢Δ͜ͱͰ  $PSPVUJOFTͷԠ༻తͳ࢖͍ํΛ஌ͬͯ΋Β͏

͜ͷηογϣϯͷ໨త w ,UPSͷઃܭ΍"1* w $PSPVUJOFͷ  ௿Ϩϕϧͳ"1*ͷ঺հ w 4FSWFS4JEF,UPS w ࣮ફతͳ,UPSͷ5JQT΍ӡ༻ࣄྫ
w $PSPVUJOFͷ  Ұൠతͳ஌ࣝ΍࢖͍ํ w $MJFOU4JEF,UPS ࿩͢͜ͱ ࿩͞ͳ͍͜ͱ

$PSPVUJOFTͷ௿Ϩϕϧ"1* ,UPSͱඇಉظॲཧύΠϓϥΠϯ ,UPSΛ$PSPVUJOFTͰඥղ͘ ϓϥάΠϯػߏͱύΠϓϥΠϯػߏ ϚΠΫϩϑϨʔϜϫʔΫͷࢥ૝

w ,UPSͷઃܭࢥ૝ͷҰͭɻ௚༁͢ΔͱʮࣗઆΛ࣋ͨͳ͍ʯ w ϑϨʔϜϫʔΫଆ͸ΞϓϦߏ੒΍ػೳΛۃྗڧ੍͠ͳ͍ͨΊ  ΞϓϦέʔγϣϯ։ൃऀͷҙࢥʹଟ͕͘ҕͶΒΕ͍ͯΔ  DG/PEFKTͷϑϨʔϜϫʔΫ&YQSFTT Unopinionated

w ϑϨʔϜϫʔΫͷҰൠతͳओཁػೳΛίΞίϯϙʔωϯτ͔Β  ෼཭͢Δ͜ͱͰϚΠΫϩϑϨʔϜϫʔΫΛ࣮ݱ  DG3VCZPO3BJMTͱ4JOBUSB 4QSJOH'SBNFXPSL w σϑΥϧτઃఆͰ͸ϩΪϯάػೳ΍  ςϯϓϨʔτΤϯδϯ΍+TPO.BQQFSͳͲ΋ಋೖ͞Ε͍ͯͳ͍ ബ͍ϑϨʔϜϫʔΫ

ϚΠΫϩϑϨʔϜϫʔΫͷϝϦοτ w ඞཁ࠷খݶͷߏ੒Ͱ։ൃΛ։࢝Ͱ͖ΔͷͰ  ϓϩτλΠϐϯάͱͯ͠ͷΞϓϦέʔγϣϯ΍  ϚΠΫϩαʔϏεతʹ୯Ұͷ੹຿Λ࣋ͭΞϓϦέʔγϣϯΛ  খ͘͞࡞Γ࢝ΊΔͷʹద͍ͯ͠Δ w ҉໧తͳઃఆ΍ػೳ͕΄ͱΜͲͳ͍ͨΊ  ϑϨʔϜϫʔΫͱ࣮ͯ͠ߦ͞Ε͍ͯΔػೳΛ  ΞϓϦέʔγϣϯ։ൃऀ͕೺Ѳ͢Δͷ͕ൺֱత༰қ

FeatureʹΑΔϓϥάΠϯػߏ w ೝূ΍%*ͳͲͷ࣮ફతͳػೳ͔ΒϧʔςΟϯά΍  ϩΪϯάͳͲͷجຊతͳػೳ·Ͱͷ΄ͱΜͲ͕  'FBUVSFͱ͍͏ϓϥάΠϯܗࣜͰຊମ͔Β  ੾Γग़ͯ͠ఏڙ͞Ε͍ͯΔ w 'FBUVSFΛΞϓϦέʔγϣϯʹJOTUBMM͢Δ͜ͱͰ  ࣗ༝ʹػೳΛ௥ՃͰ͖Δ w
ಠࣗʹ$VTUPN'FBUVSFΛ࣮૷͢Δ͜ͱ΋Մೳ

fun Application.main() { routing { get("/kotline_fest") { call.respondText { "Kotlin
Fest 2019!” } } } } Featureͷinstallྫ w จࣈྻΛฦ͢࠷খͷΞϓϦέʔγϣϯͷίʔυ

fun Application.main() { install(DefaultHeaders) install(CallLogging) routing { get("/kotline_fest") { call.respondText
{ "Kotlin Fest 2019!” } } } } Featureͷinstallྫ w JOTUBMMϝιουΛ࢖༻ͯ͠ΞϓϦέʔγϣϯʹػೳ௥Ճ

ύΠϓϥΠϯػߏ w ,UPS͕ϦΫΤετΛड͚ͯॲཧΛߦ্͍ͬͯ͘Ͱ  ΞϓϦέʔγϣϯ։ൃऀ͕ॊೈʹ'FBUVSF΍3PVUJOHຖͷॱংΛ  ఆٛͰ͖ΔΑ͏ͳܭࢉύΠϓϥΠϯΛఏڙ w ܭࢉύΠϓϥΠϯΛ֦ு͢ΔͨΊͷ"1*΋ఏڙ͞Ε͍ͯͯ  ಠࣗͷܭࢉύΠϓϥΠϯΛ࣮૷ͯ͠  $VTUPN'FBUVSFͱͯ͠JOTUBMM ࣮ߦ͢Δ͜ͱ΋Մೳ

1IBTF 1IBTF 1IBTF 1IBTF { setHeader() } { getAuth(userID) }
{ logging(response) } { saveProfile( userID, profile ) } ύΠϓϥΠϯػߏͷΠϝʔδ

{ setHeader() } { getAuth(userID) } { logging(response) } {
saveProfile( userID, profile ) } w ,UPS͸ϦΫΤετΛड͚ΔͱίϧʔνϯΛ։࢝ͯ͠  ܭࢉύΠϓϥΠϯʹׂΓ౰ͯΒΕͨॲཧΛ࣮ߦ͍ͯ͘͠ 1IBTF 1IBTF 1IBTF 1IBTF

{ asyncFun(context) } { getAuth(userID) } { logging(response) } {
saveProfile( userID, profile ) } w ,UPS͸ϦΫΤετΛϋϯυϦϯά͢ΔͱίϧʔνϯΛ։࢝ͯ͠ ܭࢉ1JQFMJOFʹׂΓ౰ͯΒΕͨॲཧΛ࣮ߦ͍ͯ͘͠ 1IBTF 1IBTF 1IBTF 1IBTF override fun handle(ɾɾɾ) { try { ɾɾɾ launch(dispatcher + JettyCallHandlerCoroutineName) ɹɹɹɹɹɹɹɾɾɾ try { pipeline().execute(call) } catch (cancelled: CancellationException) { ɹɹɹɹɹɹɹɹɹɹɾɾɾ } } } catch (ex: Throwable) { ɹɹɹɹɹɹɹɾɾɾ } }

saveProfile( userID, profile ) } w ܭࢉύΠϓϥΠϯ͸1JQFMJOF1IBTFʹΑͬͯॲཧͷॱংΛఆٛ  1JQFMJOF1IBTFຖʹ೚ҙͷॲཧΛׂΓ౰͍ͯͯ͘͜ͱʹΑͬͯ  ύΠϓϥΠϯશମͷॲཧΛܾఆ͢Δ͜ͱ͕Ͱ͖Δ 1IBTF 1IBTF 1IBTF 1IBTF

saveProfile( userID, profile ) } w 1JQFMJOF1IBTF͸طʹఆٛ͞Ε͍ͯΔ΋ͷ΋͋Ε͹  ࣗ෼Ͱ৽͘͠೚ҙͷॱ൪Ͱ௥Ճ͢Δ͜ͱ΋Ͱ͖Δ  ҎԼ͸1JQFMJOF1IBTFͷྫ 4FUVQ .POJUPSJOH $BMM 4FOE

4FUVQ $BMM 4FOE .POJUPSJOH w 1JQFMJOF1IBTF΁ͷॲཧͷׂΓ౰ͯ͸  'FBUVSFͷJOTUBMM΍3PVUJOHͷఆٛʹΑͬͯߦΘΕΔ %FGBVMU)FBEFS $BMM-PHHJOH 'FBUVSF
3PVUJOH

4FUVQ $BMM 4FOE .POJUPSJOH %FGBVMU)FBEFS $BMM-PHHJOH 'FBUVSF 3PVUJOH JOTUBMM w
1JQFMJOF1IBTF΁ͷॲཧͷׂΓ౰ͯ͸  'FBUVSFͷJOTUBMM΍3PVUJOHͷఆٛʹΑͬͯߦΘΕΔ  ˞ͻͱͭͷϑΣΠζʹෳ਺ͷॲཧΛׂΓ౰ͯΔ͜ͱ΋Մೳ

4FUVQ $BMM 4FOE .POJUPSJOH { setHeader() } { getAuth(userID) }
{ saveProfile( userID, profile ) } w 1JQFMJOF1IBTF΁ͷॲཧͷׂΓ౰ͯ͸  'FBUVSFͷJOTUBMM΍3PVUJOHͷఆٛʹΑͬͯߦΘΕΔ

4FUVQ $BMM 4FOE .POJUPSJOH { asyncFun(context) } { getAuth(userID) }
{ logging(response) } { saveProfile( userID, profile ) } "QQMJDBUJPO$BMM w 1JQFMJOF1IBTFؒͰ͸"QQMJDBUJPO$BMMͱ͍͏  ΞϓϦέʔγϣϯ΍ϦΫΤετɾϨεϙϯεʹؔ͢Δ৘ใΛ  อ࣋ͨ͠NVUBCMFͳΦϒδΣΫτΛڞ༗͍ͯ͠Δ

{ logging(response) } { saveProfile( userID, profile ) }

{ logging(response) } { saveProfile( userID, profile ) } w 5ISFBEᶃͰϦΫΤετΛϋϯυϦϯάͯ͠  5ISFBEᶄ্ͰίϧʔνϯΛ։࢝  ͦͷ··5ISFBEᶄ্ͷίϧʔνϯͰ1JQFMJOFΛ࣮ߦ

{ logging(response) } { saveProfile( userID, profile ) } w 5ISFBEᶃͷεϨου͸ϊϯϒϩοΩϯάঢ়ଶͳͷͰ  ଞͷϦΫΤετΛ଴ͭ͜ͱ͕Ͱ͖Δ

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧ͕։࢝ { setHeader() } { getAuth(userID)
} { logging(response) } { saveProfile( userID, profile ) } w 5ISFBEᶄ্ͷίϧʔνϯ͕ผͷίϧʔνϯΛಉεϨουͰ։࢝ ᶃ4FUVQϑΣΠζʹׂΓ౰ͯΒΕͨϥϜμࣜΛ࣮ߦ

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧ͕ऴྃ ॲཧ͕։࢝ { logging(response) } {
saveProfile( userID, profile ) } { getAuth(userID) } { setHeader() } w ᶃ4FUVQϑΣΠζΛ࣮ߦ͢Δίϧʔνϯ͕׬ྃ  ᶄ.POJUPSJOHϑΣΠζͷॲཧΛ࣮ߦ͢ΔผͷίϧʔνϯΛ։࢝

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧ͕։࢝ { setHeader() } { getAuth(userID)
} { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ ॲཧ͕ऴྃ w ᶄ.POJUPSJOHϑΣΠζΛ࣮ߦ͢Δίϧʔνϯ͕׬ྃ  ᶅ$BMMϑΣΠζͰผͷॲཧΛ࣮ߦ͢ΔผͷίϧʔνϯΛ։࢝

{ logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕։࢝ w ᶅ$BMMϑΣΠζΛ࣮ߦ͢Δίϧʔνϯ͕׬ྃ  ᶆ4FOEϑΣΠζͰผͷॲཧΛ࣮ߦ͢ΔผͷίϧʔνϯΛ։࢝

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ { setHeader()
} { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } w 4FOEϑΣΠζͷॲཧ͕׬ྃͨ͠Β5ISFBEᶄ্ͷίϧʔνϯ͕ ऴྃ͠ɺݺͼग़͠ݩͷ5ISFBEᶃͷ໭ͬͯϋϯυϦϯά͕ऴྃ

{ logging(response) } { saveProfile( userID, profile ) } w 5ISFBEᶄ্Ͱ։࢝ͨ͠࠷ॳͷίϧʔνϯ͕  ֤1JQFMJOF1IBTFຖʹ౎౓ίϧʔνϯΛੜ੒͍ͯ͠Δ  ͦΕΒ͸શͯ5ISFBEᶄ্Ͱಈ࡞͢Δ ίϧʔνϯ" ίϧʔνϯ# ίϧʔνϯ$ ίϧʔνϯ%

ϓϥάΠϯͱύΠϓϥΠϯػߏ w ,UPSຊମ͸࠷௿ݶͷػೳ͔࣋ͨ͠ͳ͍୅ΘΓʹ  'FBUVSFΛ࢖ͬͨϓϥάΠϯػߏʹΑͬͯ  Ϣʔβʔ͕ࣗ༝ʹػೳΛ௥Ճ͢Δ͜ͱ͕Ͱ͖Δ w ,UPS͔Βఏڙ͞ΕΔܭࢉύΠϓϥΠϯػߏͱ"1*ʹΑͬͯ  ΞϓϦέʔγϣϯ։ൃऀ͕ݻ༗ͷϧʔςΟϯάॲཧ΍  ෳ਺ϧʔςΟϯάʹ·͕ͨͬͨڞ௨ॲཧΛॊೈͳॱ൪Ͱ  ࣮ߦͤ͞Δ͜ͱ͕Մೳ

w ίϧʔνϯΛར༻ͯ͠ඇಉظϓϩάϥϛϯάϞσϧΛ  ѻ͍΍͍͢ܗͰΞϓϦέʔγϣϯ։ൃऀʹఏڙ w ύΠϓϥΠϯ಺Ͱࣗ༝ʹඇಉظॲཧΛ։࢝͢Δ͜ͱ͕Ͱ͖Δ ඇಉظॲཧύΠϓϥΠϯ

w TVTQFOEؔ਺ʹΑͬͯҰ࣌தஅ͢Δྫ w MBVODIؔ਺ͰίϧʔνϯΛผεϨουͰ։࢝͢Δྫ w BTZODؔ਺ͰίϧʔνϯΛผεϨουͰ։࢝͢Δྫ w QSPDFFEϝιουͱBXBJUؔ਺Λ૊Έ߹ΘͤΔྫ ঺հ͢ΔඇಉظॲཧύΠϓϥΠϯͷ࢖͍ํ

4FUVQ $BMM 4FOE .POJUPSJOH { delay(1000L) } { logging(response) }
{ saveProfile( userID, profile ) } { getAuth(userID) } Ұ࣌தஅ͢Δؔ਺ 1 : suspendؔ਺ʹΑͬͯҰ࣌தஅ͢Δྫ

4FUVQ $BMM 4FOE .POJUPSJOH { delay(1000L) } { getAuth(userID) }
{ logging(response) } { saveProfile( userID, profile ) } w 5ISFBEᶃͰϦΫΤετΛϋϯυϦϯάͯ͠  5ISFBEᶄ্ͰίϧʔνϯΛ։࢝  ͦͷ··5ISFBEᶄ্ͷίϧʔνϯͰ1JQFMJOFΛ࣮ߦ

4FUVQ $BMM 4FOE .POJUPSJOH w 5ISFBEᶄ্Ͱίϧʔνϯ͕4FUVQϑΣΠζͷॲཧΛ࣮ߦ ॲཧΛ࣮ߦ { delay(1000L) }
{ getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) }

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧ͕ऴྃ ॲཧΛ࣮ߦ { delay(1000L) } {
logging(response) } { saveProfile( userID, profile ) } { getAuth(userID) } w 4FUVQϑΣΠζͷॲཧ͕׬ྃͨ͠Β࣍ʹ5ISFBEᶄ্Ͱ  ίϧʔνϯ͕.POJUPSJOHϑΣΠζͷॲཧΛ࣮ߦ Ұ࣌தஅ͢Δؔ਺

4FUVQ $BMM 4FOE .POJUPSJOH w ॲཧΛҰ࣌தஅͯ͠ɺॲཧΛ࠶։͢Δ·Ͱίϧʔνϯ্Ͱ଴ػ  5ISFBEᶄ͸ผͷϦΫΤετͷॲཧΛड͚෇͚ΒΕΔΑ͏ʹͳΔ ॲཧΛҰ࣌தஅ { delay(1000L)
} { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ Ұ࣌தஅ͢Δؔ਺

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧΛ࠶։ { delay(1000L) } { getAuth(userID)
} { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ w தஅॲཧ͕׬ྃͨ͠Β5ISFBEᶄͰ.POJUPSJOHϑΣΠζͷ  ࢒ΓͷॲཧΛ࣮ߦ ҧ͏5ISFBEͷՄೳੑ͕͋Δ͜ͱʹ஫ҙ

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧΛ࣮ߦ { delay(1000L) } { getAuth(userID)
} { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ w .POJUPSJOHϑΣΠζͷॲཧ͕׬ྃͨ͠Β࣍ʹ5ISFBEᶄ্Ͱ  ίϧʔνϯ͕$BMMϑΣΠζͷॲཧΛ࣮ߦ ॲཧ͕ऴྃ

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧΛ࣮ߦ { delay(1000L) } { getAuth(userID)
} { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ w $BMMϑΣΠζͷॲཧ͕׬ྃͨ͠Β࣍ʹ5ISFBEᶄ্Ͱ  ίϧʔνϯ͕4FOEϑΣΠζͷॲཧΛ࣮ߦ

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ { delay(1000L)
} { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } w 4FOEϑΣΠζͷॲཧ͕׬ྃͨ͠Β5ISFBEᶄ্ͷίϧʔνϯ͕ ऴྃ͠ɺݺͼग़͠ݩͷ5ISFBEᶃͷ໭ͬͯϋϯυϦϯά͕ऴྃ

w ॲཧ͕Ұ࣌தஅ͍ͯ͠ΔؒʹύΠϓϥΠϯ࣮ߦεϨουΛ  ผͷϦΫΤετͷͨΊʹར༻͢Δ͜ͱ͕Ͱ͖Δ w ແҋʹεϨουΛੜ੒ͤͣɺޮ཰తʹαʔόʔͷϦιʔεΛ  ׆༻͢Δ͜ͱ͕Ͱ͖Δ 1 : suspendؔ਺ʹΑͬͯҰ࣌தஅ͢Δྫ

4FUVQ $BMM 4FOE .POJUPSJOH { launch { delay(1000L) }  logging(request)
} { logging(response) } { saveProfile( userID, profile ) } { getAuth(userID) } ผεϨουͰ  ॲཧΛߦ͏ϥϜμ 2 : launchؔ਺ͷྫ

4FUVQ $BMM 4FOE .POJUPSJOH { launch { delay(1000L) }  logging(request)
} { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } w 5ISFBEᶃͰϦΫΤετΛϋϯυϦϯάͯ͠  5ISFBEᶄ্ͰίϧʔνϯΛ։࢝  ͦͷ··5ISFBEᶄ্ͷίϧʔνϯͰ1JQFMJOFΛ࣮ߦ

4FUVQ $BMM 4FOE .POJUPSJOH w 5ISFBEᶄ্Ͱίϧʔνϯ͕4FUVQϑΣΠζͷॲཧΛ࣮ߦ ॲཧΛ࣮ߦ { launch {
delay(1000L) }  logging(request) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) }

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧ͕ऴྃ ॲཧΛ࣮ߦ { logging(response) } {
saveProfile( userID, profile ) } { getAuth(userID) } w 4FUVQϑΣΠζͷॲཧ͕׬ྃͨ͠Β࣍ʹ5ISFBEᶄ্Ͱ  ίϧʔνϯ͕.POJUPSJOHϑΣΠζͷॲཧΛ࣮ߦ { launch { delay(1000L) }  logging(request) } ผεϨουͰ  ॲཧΛߦ͏ϥϜμ

4FUVQ $BMM 4FOE .POJUPSJOH w MBVODIؔ਺ʹΑͬͯ5ISFBEᶅ্ͰίϧʔνϯΛ։࢝  5ISFBEᶄͱ5ISFBEᶅͷͦΕͧΕͰॲཧΛ࣮ߦ MBVODIؔ਺Λ࣮ߦ { getAuth(userID)
} { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ { launch { delay(1000L) }  logging(request) } ผεϨουͰ  ॲཧΛߦ͏ϥϜμ

4FUVQ $BMM 4FOE .POJUPSJOH w MBVODIؔ਺ʹΑͬͯ5ISFBEᶅ্ͰίϧʔνϯΛ։࢝  5ISFBEᶄͱ5ISFBEᶅͷͦΕͧΕͰॲཧΛ࣮ߦ { launch {
delay(1000L) }  logging(request) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ ࢒ΓͷॲཧΛ࣮ߦ 5ISFBEᶅͰ࣮ߦத ผεϨουͰ  ॲཧΛߦ͏ϥϜμ

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧΛ࣮ߦ { launch { delay(1000L) } 
logging(request) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ w .POJUPSJOHϑΣΠζͷॲཧ͕׬ྃͨ͠Β࣍ʹ5ISFBEᶄ্Ͱ  ίϧʔνϯ͕$BMMϑΣΠζͷॲཧΛ࣮ߦ ॲཧ͕ऴྃ 5ISFBEᶅͰ࣮ߦத

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧΛ࣮ߦ { launch { delay(1000L) } 
logging(request) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ w $BMMϑΣΠζͷॲཧ͕׬ྃͨ͠Β࣍ʹ5ISFBEᶄ্Ͱ  ίϧʔνϯ͕4FOEϑΣΠζͷॲཧΛ࣮ߦ 5ISFBEᶅͰ࣮ߦத

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ { launch
{ delay(1000L) }  logging(request) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } w 4FOEϑΣΠζͷॲཧ͕׬ྃͨ͠Β5ISFBEᶄ্ͷίϧʔνϯ͸ 5ISFBEᶅͷίϧʔνϯ͕ऴྃ͢Δ·Ͱ଴ͭ 5ISFBEᶅͰ࣮ߦத

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ { launch
{ delay(1000L) }  logging(request) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } 5ISFBEᶅͰ  ॲཧ͕ऴྃ w 5ISFBEᶅͷίϧʔνϯ͕ऴྃͨ͠Β5ISFBEᶄ্ͷίϧʔνϯ ͕ऴྃ͠ɺݺͼग़͠ݩͷ5ISFBEᶃͷ໭ͬͯϋϯυϦϯά͕ऴྃ

2 : launchؔ਺ͷྫ w MBVODIίϧʔνϯϏϧμʔΛύΠϓϥΠϯ্Ͱ࣮ߦ͢Δͱ  ผεϨουͰ৽ͨʹίϧʔνϯΛ։࢝ͯ͠  ݩͷύΠϓϥΠϯͷॲཧͱ͸ฏߦʹܭࢉΛߦ͏͜ͱ͕Ͱ͖Δ w ͜ΕʹΑͬͯ*0଴͕ͪ௕͍ॲཧΛMBVODIίϧʔνϯϏϧμʔͰͷ  ίϧʔνϯͰ࣮ߦ͢Δ͜ͱʹΑͬͯ 
ޮ཰తʹฏߦॲཧΛߦ͏͜ͱ͕Ͱ͖Δ৔߹͕͋Δ

4FUVQ $BMM 4FOE .POJUPSJOH { async { delay(1000L)  “Finish” }.await()
} { logging(response) } { saveProfile( userID, profile ) } { getAuth(userID) } ผεϨουͰॲཧΛߦͬͯ  ׬ྃΛ଴ͭϥϜμ 3 : asyncؔ਺ͷྫ

} { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } w 5ISFBEᶃͰϦΫΤετΛϋϯυϦϯάͯ͠  5ISFBEᶄ্ͰίϧʔνϯΛ։࢝  ͦͷ··5ISFBEᶄ্ͷίϧʔνϯͰ1JQFMJOFΛ࣮ߦ

4FUVQ $BMM 4FOE .POJUPSJOH w 5ISFBEᶄ্Ͱίϧʔνϯ͕4FUVQϑΣΠζͷॲཧΛ࣮ߦ ॲཧΛ࣮ߦ { async {
delay(1000L)  “Finish” }.await() } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) }

saveProfile( userID, profile ) } { getAuth(userID) } w 4FUVQϑΣΠζͷॲཧ͕׬ྃͨ͠Β࣍ʹ5ISFBEᶄ্Ͱ  ίϧʔνϯ͕.POJUPSJOHϑΣΠζͷॲཧΛ࣮ߦ { async { delay(1000L)  “Finish” }.await() } ผεϨουͰॲཧΛߦͬͯ  ׬ྃΛ଴ͭϥϜμ

4FUVQ $BMM 4FOE .POJUPSJOH w BTZODؔ਺ʹΑͬͯ5ISFBEᶅ্ͰίϧʔνϯΛ։࢝  5ISFBEᶄͱ5ISFBEᶅͷͦΕͧΕͰॲཧΛ࣮ߦ BTZODؔ਺Λ࣮ߦ { getAuth(userID)
} { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ { async { delay(1000L)  “Finish” }.await() } ผεϨουͰॲཧΛߦͬͯ  ׬ྃΛ଴ͭϥϜμ

4FUVQ $BMM 4FOE .POJUPSJOH w BTZODؔ਺ʹΑͬͯ5ISFBEᶅ্ͰίϧʔνϯΛ։࢝  5ISFBEᶄͱ5ISFBEᶅͷͦΕͧΕͰॲཧΛ࣮ߦ { async {
delay(1000L)  “Finish” }.await() } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ ࢒ΓͷॲཧΛ࣮ߦ ผεϨουͰॲཧΛߦͬͯ  ׬ྃΛ଴ͭϥϜμ 5ISFBEᶅͰ࣮ߦத

} { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ 5ISFBEᶅ͕  ऴΘΔ·Ͱ଴ػ 5ISFBEᶅͰ࣮ߦத ผεϨουͰॲཧΛߦͬͯ  ׬ྃΛ଴ͭϥϜμ w 5ISFBEᶅ্ͷίϧʔνϯͷ׬ྃΛ଴ػ͍ͯ͠ΔͷͰ  5ISFBEᶄͷ.POJUPSJOHϑΣΠζͷॲཧ΋׬ྃ͠ͳ͍··

} { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ ࢒ΓͷॲཧΛ࣮ߦ ผεϨουͰॲཧΛߦͬͯ  ׬ྃΛ଴ͭϥϜμ w 5ISFBEᶅ্ͷίϧʔνϯͷ׬ྃͷ݁ՌΛड͚ͯ  5ISFBEᶄͷ.POJUPSJOHϑΣΠζͷॲཧΛ࠶։ 5ISFBEᶅͰॲཧ͕ऴྃ

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧΛ࣮ߦ { async { delay(1000L)  “Finish”
}.await() } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ ॲཧ͕ऴྃ w 5ISFBEᶄͷ.POJUPSJOHϑΣΠζͷॲཧ͕ऴྃͯ͠  ΍ͬͱ$BMMϑΣΠζͷ࣮ߦΛ։࢝Ͱ͖Δ 5ISFBEᶅͰॲཧ͕ऴྃ

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧΛ࣮ߦ { asyncFun(context) } { getAuth(userID)
} { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ ॲཧ͕ऴྃ w 5ISFBEᶄͷ.POJUPSJOHϑΣΠζͷॲཧ͕ऴྃͯ͠  ΍ͬͱ$BMMϑΣΠζͷ࣮ߦΛ։࢝Ͱ͖Δ ͜ͷผεϨουͷॲཧ଴ͪͷ࣌ؒΛ  ༗ޮʹ࢖͏ͨΊͷ"1*͕  ,UPS͔Βఏڙ͞Ε͍ͯ·͢ʂ

4FUVQ $BMM 4FOE .POJUPSJOH { val id = async {
delay(1000L)  “Finish” }  proceed() logging(id.await()) } { logging(response) } { saveProfile( userID, profile ) } { getAuth(userID) } QSPDFFE Λ࣮ߦ͢ΔϥϜμ 4 : proceedϝιουͱasyncؔ਺ͷྫ

Proceedϝιου w ݱࡏ࣮ߦதͷϥϜμࣜΛҰ࣌தஅ͠৽͍͠ίϧʔνϯΛ  ։࢝ͯ͠ޙஈͷύΠϓϥΠϯΛ࣮ߦ͢Δ"1*  w ޙஈͷύΠϓϥΠϯͷॲཧ͕׬ྃ͢ΔͱQSPDFFE Λ࣮ߦ  ͨ͠ϥϜμࣜͷॲཧ͕࠶։͞ΕΔ

delay(1000L)  “Finish” }  proceed() logging(id.await()) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } QSPDFFE Λ࣮ߦ͢ΔϥϜμ

delay(1000L)  “Finish” }  proceed() logging(id.await()) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } w 5ISFBEᶃͰϦΫΤετΛϋϯυϦϯάͯ͠  5ISFBEᶄ্ͰίϧʔνϯΛ։࢝  ͦͷ··5ISFBEᶄ্ͷίϧʔνϯͰ1JQFMJOFΛ࣮ߦ

4FUVQ $BMM 4FOE .POJUPSJOH w 5ISFBEᶄ্Ͱίϧʔνϯ͕4FUVQϑΣΠζͷॲཧΛ࣮ߦ ॲཧΛ࣮ߦ { val id
= async { delay(1000L)  “Finish” }  proceed() logging(id.await()) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) }

saveProfile( userID, profile ) } { getAuth(userID) } w 4FUVQϑΣΠζͷॲཧ͕׬ྃͨ͠Β࣍ʹ5ISFBEᶄ্Ͱ  ίϧʔνϯ͕.POJUPSJOHϑΣΠζͷॲཧΛ࣮ߦ { val id = async { delay(1000L)  “Finish” }  proceed() logging(id.await()) } QSPDFFE Λ࣮ߦ͢ΔϥϜμ

4FUVQ $BMM 4FOE .POJUPSJOH w BTZODؔ਺ʹΑͬͯ5ISFBEᶅ্ͰίϧʔνϯΛ։࢝  5ISFBEᶄͱ5ISFBEᶅͷͦΕͧΕͰॲཧΛ࣮ߦ BTZODؔ਺Λ࣮ߦ { getAuth(userID)
} { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ { val id = async { delay(1000L)  “Finish” }  proceed() logging(id.await()) }

4FUVQ $BMM 4FOE .POJUPSJOH w BTZODؔ਺ʹΑͬͯ5ISFBEᶅ্ͰίϧʔνϯΛ։࢝  5ISFBEᶄͱ5ISFBEᶅͷͦΕͧΕͰॲཧΛ࣮ߦ { val id
= async { delay(1000L)  “Finish” }  proceed() logging(id.await()) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ ࢒ΓͷॲཧΛ࣮ߦ 5ISFBEᶅͰ࣮ߦத QSPDFFE Λ࣮ߦ͢ΔϥϜμ

delay(1000L)  “Finish” }  proceed() logging(id.await()) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ w 5ISFBEᶄ্ͰQSPDFFEΛ࣮ߦ͢Δͱ5ISFBEᶅ্ͷίϧʔνϯͷ ׬ྃΛ଴ͨͣʹ.POJUPSJOHϑΣΠζΛҰ࣌தஅͰ͖Δ ॲཧΛҰ࣌தஅ QSPDFFE Λ࣮ߦ͢ΔϥϜμ 5ISFBEᶅͰ࣮ߦத

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧΛ࣮ߦ { val id = async
{ delay(1000L)  “Finish” }  proceed() logging(id.await()) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ w 5ISFBEᶄͷ.POJUPSJOHϑΣΠζΛҰ࣌தஅͯ͠  ͦͷ··5ISFBEᶄ্Ͱ$BMMϑΣΠζͷ࣮ߦΛ։࢝ ॲཧΛҰ࣌தஅ 5ISFBEᶅͰ࣮ߦத

{ delay(1000L)  “Finish” }  proceed() logging(id.await()) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ ॲཧ͕ऴྃ w $BMMϑΣΠζͷॲཧ͕׬ྃͨ͠Β࣍ʹ5ISFBEᶄ্Ͱ  ίϧʔνϯ͕4FOEϑΣΠζͷॲཧΛ࣮ߦ ॲཧΛҰ࣌தஅ 5ISFBEᶅͰ࣮ߦத

{ delay(1000L)  “Finish” }  proceed() logging(id.await()) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ ॲཧ͕ऴྃ w 5ISFBEᶄ্Ͱ4FOEϑΣΠζͷॲཧΛ࣮ߦ͍ͯ͠Δؒʹ  5ISFBEᶅ্ͷίϧʔνϯͷॲཧ͕׬ྃ ॲཧΛҰ࣌தஅ 5ISFBEᶅͰॲཧ͕ऴྃ

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ { val id
= async { delay(1000L)  “Finish” }  proceed() logging(id.await()) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } w 4FOEϑΣΠζͷॲཧ͕׬ྃͨ͠Β5ISFBEᶄ্ͷίϧʔνϯ͸  .POJUPSJOHϑΣΠζͷॲཧΛ࠶։͢Δ ॲཧΛ࠶։ 5ISFBEᶅͰॲཧ͕ऴྃ

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ { val id
= async { delay(1000L)  “Finish” }  proceed() logging(id.await()) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } w 4FOEϑΣΠζͷॲཧ͕׬ྃͨ͠Β5ISFBEᶄ্ͷίϧʔνϯ͸  .POJUPSJOHϑΣΠζͷॲཧΛ࠶։͢Δ ࢒ΓͷॲཧΛ࣮ߦ 5ISFBEᶅͰॲཧ͕ऴྃ

4FUVQ $BMM 4FOE .POJUPSJOH ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ ॲཧ͕ऴྃ { val
id = async { delay(1000L)  “Finish” }  proceed() logging(id.await()) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } w 5ISFBEᶄ্ͷίϧʔνϯ͕ऴྃͨ͠Β  ݺͼग़͠ݩͷ5ISFBEᶃͷ໭ͬͯϋϯυϦϯά͕ऴྃ 5ISFBEᶅͰॲཧ͕ऴྃ

4 : proceedϝιουͱasyncؔ਺ͷྫ w ,UPS͔Βఏڙ͞Ε͍ͯΔQSPDFFEϝιουΛ࢖͏͜ͱͰ  ผεϨουͷίϧʔνϯ͔ΒͷฦΓ஋Λ଴͍ͬͯΔؒʹ  ޙଓͷผͷύΠϓϥΠϯͷॲཧΛ࣮ߦ͢Δ͜ͱ͕Ͱ͖Δ w ֤ύΠϓϥΠϯϑΣΠζͰͷϥϜμࣜΛ  ผͷ'FBUVSFͰಠཱʹఆٛ͠ͳ͕Β΋ 
ύΠϓϥΠϯϑΣΠζΛލ͍ͰඇಉظॲཧΛ࣮ߦ͢Δ͜ͱͰ  ΑΓޮ཰తʹܭࢉΛߦ͏͜ͱ͕Ͱ͖Δ

Coroutinesͷ௿Ϩϕϧͳૢ࡞ w $PSPVUJOFΛγϯϓϧʹ࢖͏͚ͩͳΒҙࣝͤͣͱ΋ࠔΒͳ͍  ͜ͱ͕ଟ͍͕ϥΠϒϥϦΛ࡞Δͱ͖ͳͲ͸ѻ͑Δͱ໾ཱͭ w $POUJOVBUJPOTVTQFOEؔ਺ͷࣗಈมܗ w TUBSU$PSPVUJOF  TUBSU$PSPVUJOF6OJOUFSDFQUFE0S3FUVSO w
TVTQFOE$PSPVUJOF6OJOUFSDFQUFE0S3FUVSO

Continuation (ܧଓ) w TVTQFOEؔ਺Ͱதஅ͞Εͨίϧʔνϯͷঢ়ଶ w தஅ͞Εͨ෦෼Ҏ߱ͷ࢒Γͷॲཧ ίʔϧόοΫ Λද͢ w SFTVNF8JUIϝιου͸׬ྃίʔϧόοΫͰ͋Γ 
ίϧʔνϯͷ׬ྃ࣌ʹ੒ޭɾࣦഊͷ͍ͣΕ͔Λฦ͢ public interface Continuation<in T> { public val context: CoroutineContext public fun resumeWith(result: Result<T>) }

suspendؔ਺ suspend fun susFuncA() { delay(1000L) } val block: suspend
() -> Unit = {} w ؔ਺಺ͰଞͷTVTQFOEؔ਺Λݺͼग़͢͜ͱͰ  ࣮ߦεϨουΛϒϩοΫͤͣʹ  ίʔυ࣮ߦΛதஅ͢ΔՄೳੑͷ͋Δؔ਺ w TVTQFOEؔ਺͸ଞͷTVTQFOEؔ਺͔ΒͷΈݺͼग़͢͜ͱ͕Մೳ TVTQFOEؔ਺ϥϜμ fun normalFunc() { susFuncA(1000L) } ௨ৗͷؔ਺͔Βͷݺͼग़͠

suspendؔ਺ suspend fun susFuncA() { delay(1000L) } val block: suspend
() -> Unit = {} w ؔ਺಺ͰଞͷTVTQFOEؔ਺Λݺͼग़͢͜ͱͰ  ࣮ߦεϨουΛϒϩοΫͤͣʹ  ίʔυ࣮ߦΛதஅ͢ΔՄೳੑͷ͋Δؔ਺ w TVTQFOEؔ਺͸ଞͷTVTQFOEؔ਺͔ΒͷΈݺͼग़͢͜ͱ͕Մೳ TVTQFOEؔ਺ϥϜμ fun normalFunc() { susFuncA(1000L) } ௨ৗͷؔ਺͔Βͷݺͼग़͠ ͳͥTVTQFOEؔ਺͸  ௨ৗͷؔ਺͔Βݺͼग़͢͜ͱ͕ग़དྷͳ͍ͷ͔ʁ

suspendؔ਺ suspend fun susFunc( time: Long ) : String TVTQFOEؔ਺
fun susFunc( time: Long, continuation: Continuation ) : Any? ੜ੒͞ΕΔίʔυ ٙࣅίʔυ w TVTQFOEम০ࢠ͸ίϯύΠϧ࣌ʹผͷؔ਺ʹม׵͞ΕΔ ˞࣮ࡍ͸TVTQFOEؔ਺಺ͷίʔυ΋γάχνϟ͕มߋ͞ΕͨΓ  ঢ়ଶΫϥε͕ੜ੒͞ΕͨΓ͍ͯ͠Δ఺ʹ஫ҙɻ

suspend fun susFunc( time: Long ) : String { delay(time)
return "Kotlin Fest!" } TVTQFOEؔ਺

suspend fun susFunc( time: Long, continuation: Continuation ) : Any?
{ val call_back = when(continuation){ is ... -> continuation else -> ... } when(call_back.lable){ 1 -> { call_back.lable = 2 return delay(time, call_back) } 2 -> { return "Kotlin Fest!" } } } suspend fun susFunc( time: Long ) : String { delay(time) return "Kotlin Fest!" } TVTQFOEؔ਺ ੜ੒͞ΕΔίʔυ ٙࣅίʔυ

(suspend) fun susFunc( time: Long, continuation: Continuation ) : Any?

{ val call_back = when(continuation){ is ... -> continuation else -> ... } when(call_back.lable){ 1 -> { call_back.lable = 2 return delay(time, call_back) } 2 -> { return "Kotlin Fest!" } } } suspend fun susFunc( time: Long ) : String { delay(time) return "Kotlin Fest!" } TVTQFOEؔ਺ ੜ੒͞ΕΔίʔυ ٙࣅίʔυ ᶃҾ਺ʹ$POUJOVBUJPO͕௥Ճ͞Ε͍ͯΔ  ᶄฦΓ஋͕"OZ ܕʹͳ͍ͬͯΔ

{ val call_back = when(continuation){ is ... -> continuation else -> ... } when(call_back.lable){ 1 -> { call_back.lable = 2 return delay(time, call_back) } 2 -> { return "Kotlin Fest!" } } } suspend fun susFunc( time: Long ) : String { delay(time) return "Kotlin Fest!" } TVTQFOEؔ਺ ੜ੒͞ΕΔίʔυ ٙࣅίʔυ ᶅ಺෦Ͱݺͼग़͍ͯ͠ΔTVTQFOEؔ਺ͷҾ਺ʹ΋ $POUJOVBUJPO͕௥Ճ͞Ε͍ͯͯ  ࣗ਎͕ड͚औͬͨ$POUJOVBUJPOΛ౉͍ͯ͠Δ

{ val call_back = when(continuation){ is ... -> continuation else -> ... } when(call_back.lable){ 1 -> { call_back.lable = 2 return delay(time, call_back) } 2 -> { return "Kotlin Fest!" } } } suspend fun susFunc( time: Long ) : String { delay(time) return "Kotlin Fest!" } TVTQFOEؔ਺ ੜ੒͞ΕΔίʔυ ٙࣅίʔυ ௨ৗͷؔ਺͔ΒTVTQFOEؔ਺Λݺͼग़ͦ͏ͱͯ͠΋  $POUJOVBUJPOΛҾ਺ͱͯ͠౉͢͜ͱ͕Ͱ͖ͳ͍

{ val call_back = when(continuation){ is ... -> continuation else -> ... } when(call_back.lable){ 1 -> { call_back.lable = 2 return delay(time, call_back) } 2 -> { return "Kotlin Fest!" } } } suspend fun susFunc( time: Long ) : String { delay(time) return "Kotlin Fest!" } TVTQFOEؔ਺ ੜ੒͞ΕΔίʔυ ٙࣅίʔυ Ͱ͸Ͳ͏΍ͬͯ࠷ॳͷTVTQFOEؔ਺Λ  ී௨ͷؔ਺͔Βݺͼग़͢ʁ  ίϧʔνϯΛ։࢝͢Δʁ

startCoroutine w ίϧʔνϯΛ࡞੒ͯ͠ݱࡏͷεϨουͰ  ϨγʔόʔͰ͋ΔTVTQFOEϥϜμΛ࣮ߦ͢Δ w MBVODI BTZODͳͲͷίϧʔνϯϏϧμʔ΋  ಺෦తʹݺͼग़ͯ͠ίϧʔνϯΛ࡞੒͍ͯ͠Δ public fun
<T> (suspend () -> T).startCoroutine( completion: kotlin.coroutines.Continuation<T> ): kotlin.Unit { /* compiled code */ }

val continuation = object : Continuation<Unit> { override val context:
CoroutineContext = EmptyCoroutineContext override fun resumeWith(result: Result<Unit>){ ɾɾɾ } } suspend { delay(1000L) }.startCoroutine(continuation) w TVTQFOEϥϜμͷ֦ுؔ਺ͱͯ͠ఆٛ͞Ε͍ͯͯ  TVTQFOEؔ਺Ҏ֎ͷ௨ৗͷؔ਺͔Β΋ݺͼग़͕͠Մೳ w $POUJOVBUJPO͸ࣗલͰ༻ҙ͢Δ͔  طʹ։͍࢝ͯ͠Δίϧʔνϯ͔Βऔಘ͢Δ

inline fun <T> (suspend () -> T).startCoroutineUninterceptedOrReturn( completion: Continuation<T> ):
Any? = (this as Function1<Continuation<T>, Any?>).invoke(completion) public fun <T> (suspend () -> T).startCoroutine( completion: kotlin.coroutines.Continuation<T> ): kotlin.Unit { /* compiled code */ } startCoroutineUninterceptedOrReturn w TUBSU$PSPVUJOFͱҧ͍ɺฦΓ஋Λड͚औΔ w ࣮ߦͨ͠TVTQFOEؔ਺͕಺෦ͷதஅ఺Ͱதஅ͞ΕΔͱ  $03065*/&@4641&/%&%ϚʔΧʔΛฦ͢

Any? = (this as Function1<Continuation<T>, Any?>).invoke(completion) internal enum class CoroutineSingletons { COROUTINE_SUSPENDED, UNDECIDED, RESUMED } startCoroutineUninterceptedOrReturn w TUBSU$PSPVUJOFͱҧ͍ɺฦΓ஋Λड͚औΔ w ࣮ߦͨ͠TVTQFOEؔ਺͕಺෦ͷதஅ఺Ͱதஅ͞ΕΔͱ  $03065*/&@4641&/%&%ϚʔΧʔΛฦ͢

kotlin.Any? { /* compiled code */ } internal enum class CoroutineSingletons { COROUTINE_SUSPENDED, UNDECIDED, RESUMED } startCoroutineUninterceptedOrReturn w TUBSU$PSPVUJOFͱҧ͍ɺฦΓ஋Λड͚औΔ w ࣮ߦͨ͠TVTQFOEؔ਺͕಺෦ͷதஅ఺Ͱதஅ͞ΕΔͱ  $03065*/&@4641&/%&%ϚʔΧʔΛฦ͢ ίϧʔνϯʹ౉͞Ε͍ͯΔ  Continuation͸Ͳ͏΍ͬͯऔಘͰ͖Δʁ

suspendCoroutineUninterceptedOrReturn w ίϧʔνϯ಺ͰݺͿ͜ͱͰίϧʔνϯ͕தஅͨ͠࢒Γͷঢ়ଶΛ  $POUJOVBUJPOΠϯελϯεͱͯ͠औಘͰ͖Δ"1* w ϥϜμࣜͰ$POUJOVBUJPOΠϯελϯεΛࢀর͠  ίϧʔνϯͷதஅɾ׬ྃͱ͍ͬͨঢ়ଶΛ௚઀੍ޚͰ͖Δ suspend inline fun
<T> suspendCoroutineUninterceptedOrReturn( crossinline block: (Continuation<T>) -> Any? ): T

w ίϧʔνϯΛதஅঢ়ଶͱͯ͠ҡ࣋͢Δ৔߹  $03065*/&@4641&/%&%ϚʔΧʔΛฦ͢ w ίϧʔνϯΛ׬ྃ͢Δ৔߹  ݁ՌΛSFTVNF8JUIϝιουʹ౉࣮ͯ͠ߦ suspend inline fun <T>
suspendCoroutineUninterceptedOrReturn( crossinline block: (Continuation<T>) -> Any? ): T suspendCoroutineUninterceptedOrReturn

KtorΛCoroutinesͰඥղ͘ w ύϑΥʔϚϯεΛߟྀͨ͠$PSPVUJOFͷੜ੒ w QSPDFFEؔ਺ͷॲཧΛͲ͏΍࣮ͬͯݱ͍ͯ͠Δͷ͔ w $PSPVUJOFΛ։࢝͢Δͱ͖ʹ$POUJOVBUJPO͚ͩͰͳ͘  ೚ҙͷΦϒδΣΫτ΋Ҿ͖౉͢ํ๏

ύϑΥʔϚϯεΛߟྀͨ͠Coroutineͷੜ੒ 4FUVQ $BMM 4FOE .POJUPSJOH { delay(1000L) } { getAuth(userID)
} { logging(response) } { saveProfile( userID, profile ) }

{ logging(response) } { saveProfile( userID, profile ) } w 5ISFBEᶄ্Ͱ։࢝ͨ͠࠷ॳͷίϧʔνϯ͕  ֤1JQFMJOF1IBTFຖʹ౎౓ίϧʔνϯΛੜ੒͍ͯ͠Δ  ͦΕΒ͸શͯ5ISFBEᶄ্Ͱಈ࡞͢Δ ίϧʔνϯ" ίϧʔνϯ# ίϧʔνϯ$ ίϧʔνϯ% 1IBTFຖʹίϧʔνϯΛ  ੜ੒͢Δ͜ͱʹΑͬͯ  1IBTFຖʹதஅॲཧ΍ΩϟϯηϧΛ  ੍ޚ͢Δ͜ͱ͕Ͱ͖Δ

{ logging(response) } { saveProfile( userID, profile ) } w 5ISFBEᶄ্Ͱ։࢝ͨ͠࠷ॳͷίϧʔνϯ͕  ֤1JQFMJOF1IBTFຖʹ౎౓ίϧʔνϯΛੜ੒͢Δ͍ͯ͠Δ  ͦΕΒ͸શͯ5ISFBEᶄ্Ͱಈ࡞͢Δ ίϧʔνϯ" ίϧʔνϯ# ίϧʔνϯ$ ίϧʔνϯ% ܰྔͱ͸͍͑  ϦΫΤετͷ౓ʹେྔʹ  ίϧʔνϯΛੜ੒͍ͯͯ͠  ύϑΥʔϚϯεʹӨڹ͸ͳ͍ͷʁ

{ logging(response) } { saveProfile( userID, profile ) } w ࠷ॳͷίϧʔνϯ͸֤1IBTFίϧʔνϯΛ࡞੒͢Δࡍʹ  ৽ͨʹ$POUJOVBUJPOΛ࡞Βͣɺࣗ਎ͷ$POUJOVBUJPOΛ  Ҿ͖౉͍ͯ͠Δ ίϧʔνϯ" ίϧʔνϯ# ίϧʔνϯ$ ίϧʔνϯ%

{ logging(response) } { saveProfile( userID, profile ) } ίϧʔνϯ" ίϧʔνϯ# ίϧʔνϯ$ ίϧʔνϯ% suspend inline fun <T> suspendCoroutineUninterceptedOrReturn( crossinline block: (Continuation<T>) -> Any? ): T w TVTQFOE$PSPVUJOF6OJOUFSDFQUFE0S3FUVSOؔ਺Λ࢖͏ͱ  ࣮ߦதͷίϧʔνϯͷ$POUJOVBUJPOΛऔΓग़ͯ͠  Ҿ਺ͷϥϜμࣜͷதͰѻ͏͜ͱ͕Ͱ͖Δ

{ logging(response) } { saveProfile( userID, profile ) } w TVTQFOE$PSPVUJOF6OJOUFSDFQUFE0S3FUVSOؔ਺Λ࢖͏ͱ  ࣮ߦதͷίϧʔνϯͷ$POUJOVBUJPOΛऔΓग़ͯ͠  Ҿ਺ͷϥϜμࣜͷதͰѻ͏͜ͱ͕Ͱ͖Δ ίϧʔνϯ" ίϧʔνϯ# ίϧʔνϯ$ ίϧʔνϯ% suspend inline fun <T> suspendCoroutineUninterceptedOrReturn( crossinline block: (Continuation<T>) -> Any? ): T

{ logging(response) } { saveProfile( userID, profile ) } w TUBSU$PSPVUJOF6OJOUFSDFQUFE0S3FUVSOؔ਺ͷҾ਺ʹ  $POUJOVBUJPOΛ౉͢ͱ৽ͨʹ$POUJOVBUJPOΛ  ࡞੒ͤͣʹίϧʔνϯΛ։࢝Ͱ͖Δ ίϧʔνϯ" ίϧʔνϯ# ίϧʔνϯ$ ίϧʔνϯ% inline fun <T> (suspend () -> T).startCoroutineUninterceptedOrReturn( completion: Continuation<T> ): kotlin.Any?

{ logging(response) } { saveProfile( userID, profile ) } ίϧʔνϯ" ίϧʔνϯ# ίϧʔνϯ$ ίϧʔνϯ% inline fun <T> (suspend () -> T).startCoroutineUninterceptedOrReturn( completion: Continuation<T> ): kotlin.Any? w TUBSU$PSPVUJOF6OJOUFSDFQUFE0S3FUVSOؔ਺ͷҾ਺ʹ  $POUJOVBUJPOΛ౉͢ͱ৽ͨʹ$POUJOVBUJPOΛ  ࡞੒ͤͣʹίϧʔνϯΛ։࢝Ͱ͖Δ

suspendCoroutineUninterceptedOrReturn { continuation -> do { val rc = PhaseʹׂΓ౰ͯΒΕͨϥϜμࣜ.
startCoroutineUninterceptedOrReturn(ɾɾɾ) ɾɾɾ } while (true) COROUTINE_SUSPENDED } w TVTQFOE$PSPVUJOF6OJOUFSDFQUFE0S3FUVSOͱ  TUBSU$PSPVUJOF6OJOUFSDFQUFE0S3FUVSOΛ૊Έ߹ΘͤΔ͜ͱͰ  $POUJOVBUJPOΛڞ༗͠ͳ͕ΒίϧʔνϯΛ࡞੒͍ͯ͠Δ

{ logging(response) } { saveProfile( userID, profile ) } w $POUJOVBUJPOΛڞ༗ͯ͠ίϧʔνϯͷੜ੒ίετΛ཈͑Δ͜ͱͰ  ύΠϓϥΠϯͷ࣮ߦ଎౓ͷύϑΥʔϚϯεΛ޲্͍ͯ͠Δ ίϧʔνϯ" ίϧʔνϯ# ίϧʔνϯ$ ίϧʔνϯ%

{ logging(response) } { saveProfile( userID, profile ) } w $POUJOVBUJPOΛڞ༗ͯ͠ίϧʔνϯͷੜ੒ίετΛ཈͑Δ͜ͱͰ  ύΠϓϥΠϯͷ࣮ߦ଎౓ͷύϑΥʔϚϯεΛ޲্͍ͯ͠Δ ίϧʔνϯ" ίϧʔνϯ# ίϧʔνϯ$ ίϧʔνϯ% TVTQFOE$PSPVUJOF6OJOUFSDFQUFE0S3FUVSOͱ  TUBSU$PSPVUJOF6OJOUFSDFQUFE0S3FUVSOΛ  ૊Έ߹ΘͤͰίϧʔνϯͷੜ੒ίετΛ཈͑Δํ๏͸  (FOFSBUPSTͷZJFMEؔ਺ͷ಺෦࣮૷Ͱ΋࢖ΘΕ͍ͯΔ

proceedؔ਺ͷ࣮૷ 4FUVQ $BMM 4FOE .POJUPSJOH { val id = async
{ delay(1000L)  “Finish” }  proceed() logging(id.await()) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } QSPDFFE Λ࣮ߦ͢ΔϥϜμ

{ delay(1000L)  “Finish” }  proceed() logging(id.await()) } { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) } ॲཧ͕ऴྃ w QSPDFFEϝιουΛ࣮ߦ͢Δͱ֘౰ϑΣΠζͷॲཧΛதஅͯ͠  ޙଓͷύΠϓϥΠϯͷॲཧΛ࣮ߦͰ͖Δ ॲཧΛҰ࣌தஅ 5ISFBEᶅͰ࣮ߦத

suspendCoroutineUninterceptedOrReturn { continuation -> do { ɾɾɾ val rc =
PhaseʹׂΓ౰ͯΒΕͨϥϜμࣜ. startCoroutineUninterceptedOrReturn(ɾɾɾ) ɾɾɾ } while (true) COROUTINE_SUSPENDED } w QSPDFFEϝιουΛ࣮ߦ͢Δͱ$POUJOVBUJPOΛ৽ͨʹ࡞੒ͯ͠  ผεϨουͰಈ࡞͢ΔίϧʔνϯΛ։࢝͢Δ

private val continuation: Continuation<Unit> = object : Continuation<Unit>, CoroutineStackFrame {
ɾɾɾ override val context: CoroutineContext get () { val cont = rootContinuation return when (cont) { null -> throw IllegalStateException("Not started") is Continuation<*> -> cont.context is List<*> -> (cont as List<Continuation<*>>).last().context else -> throw IllegalStateException("e") } } }

ಠࣗͷCoroutineStart 4FUVQ $BMM 4FOE .POJUPSJOH { delay(1000L) } { delay(1000L)
} { getAuth(userID) } { logging(response) } { saveProfile( userID, profile ) }

{ logging(response) } { saveProfile( userID, profile ) } w ΞϓϦέʔγϣϯ΍ϦΫΤετɺϨεϙϯεͷ৘ใΛ  ϛϡʔλϒϧʹอ࣋ͨ͠"QQMJDBUJPO$BMMΦϒδΣΫτΛ  ֤1JQFMJOF1IBTFؒͰڞ༗͍ͯ͠Δ { asyncFun(context) } { getAuth(userID) } { saveProfile( userID, profile ) } "QQMJDBUJPO$BMM

{ logging(response) } { saveProfile( userID, profile ) } w "QQMJDBUJPO$BMM͸ύΠϓϥΠϯ಺ʹάϩʔόϧͳม਺ͱͯ͠  ڞ༗͞ΕΔͷͰ͸ͳ͘ɺ1JQFMJOF1IBTFຖͷίϧʔνϯੜ੒࣌ʹ  $POUJOVBUJPOͱҰॹʹҾ͖౉͍ͯ͠Δ "QQMJDBUJPO$BMM

{ logging(response) } { saveProfile( userID, profile ) } w "QQMJDBUJPO$BMM͸ύΠϓϥΠϯ಺ʹάϩʔόϧͳม਺ͱͯ͠  ڞ༗͞ΕΔͷͰ͸ͳ͘ɺ1JQFMJOF1IBTFຖͷίϧʔνϯੜ੒࣌ʹ  $POUJOVBUJPOͱҰॹʹҾ͖౉͍ͯ͠Δ "QQMJDBUJPO$BMM ίϧʔνϯΛ։࢝͢Δͱ͖ʹ  $POUJOVBUJPOҎ֎ͷΦϒδΣΫτΛ  Ͳ͏΍ͬͯ౉͢ͷ͔ʁ

public inline fun <T> (suspend () -> T). startCoroutineUninterceptedOrReturn( completion:
kotlin.coroutines.Continuation<T> ): kotlin.Any? { /* compiled code */ } public inline fun <R, T> (suspend R.() -> T). startCoroutineUninterceptedOrReturn( receiver: R, completion: kotlin.coroutines.Continuation<T> ): kotlin.Any? { /* compiled code */ } w TUBSU$PSPVUJOF6OJOUFSDFQUFE0S3FUVSOΛ࢖͏ͱ  ৽ͨʹίϧʔνϯΛੜ੒͢Δͱ͖ʹ$POUJOVBUJPOΛҾ਺ͱͯ͠  ౉͢͜ͱͰίϧʔνϯؒͰ$POUJOVBUJPOΛڞ༗Ͱ͖Δ

public inline fun <T> (suspend () -> T). startCoroutineUninterceptedOrReturn( completion:
kotlin.coroutines.Continuation<T> ): kotlin.Any? { /* compiled code */ } public inline fun <R, T> (suspend R.() -> T). startCoroutineUninterceptedOrReturn( receiver: R, completion: kotlin.coroutines.Continuation<T> ): kotlin.Any? { /* compiled code */ } w $POUJOVBUJPOΛίϧʔνϯʹ౉͢"1*͔͠ެ։͞Ε͍ͯͳ͍  ͦͷͨΊίϧʔνϯ։࢝࣌ʹ"QQMJDBUJPO$BMM΋Ҿ͖౉͢͜ͱ͸  ௨ৗ͸ෆՄೳ

internal actual inline fun <R, A> (suspend R.(A) -> Unit).startCoroutineUninterceptedOrReturn3(
receiver: R, arg: A, continuation: Continuation<Unit> ): Any? { val function = (this as Function3<R, A, Continuation<Unit>, Any?>) return function.invoke(receiver, arg, continuation) } w ,UPSͰ͸$POUJOVBUJPOʹՃ͑ͯ೚ҙͷܕͷΦϒδΣΫτΛ  Ҿ͖౉ͯ͠৽ͨʹίϧʔνϯΛ։࢝͢Δؔ਺Λಠ࣮ࣗ૷͍ͯ͠Δ w ૊ΈࠐΈؔ਺ͱ͍ۙॲཧΛҎԼͷؔ਺Ͱ࣮ݱ͍ͯ͠Δ

public inline fun <R, T> (suspend R.() -> T). startCoroutineUninterceptedOrReturn(
receiver: R, completion: kotlin.coroutines.Continuation<T> ): kotlin.Any? { /* compiled code */ } internal actual inline fun <R, A> (suspend R.(A) -> Unit).startCoroutineUninterceptedOrReturn3( receiver: R, arg: A, continuation: Continuation<Unit> ): Any? { val function = (this as Function3<R, A, Continuation<Unit>, Any?>) return function.invoke(receiver, arg, continuation) } ϥΠϒϥϦ͔Βఏڙ͞Ε͍ͯΔؔ਺ ,UPSͰಠ࣮ࣗ૷͍ͯ͠Δίϧʔνϯ։࢝"1*

public inline fun <R, T> (suspend R.() -> T). startCoroutineUninterceptedOrReturn(
receiver: R, completion: kotlin.coroutines.Continuation<T> ): kotlin.Any? { /* compiled code */ } internal actual inline fun <R, A> (suspend R.(A) -> Unit).startCoroutineUninterceptedOrReturn3( receiver: R, arg: A, continuation: Continuation<Unit> ): Any? { val function = (this as Function3<R, A, Continuation<Unit>, Any?>) return function.invoke(receiver, arg, continuation) } ,UPSͰಠ࣮ࣗ૷͍ͯ͠Δίϧʔνϯ։࢝"1* ϥΠϒϥϦ͔Βఏڙ͞Ε͍ͯΔؔ਺

internal actual inline fun <R, A> (suspend R.(A) -> Unit).startCoroutineUninterceptedOrReturn3(
receiver: R, arg: A, continuation: Continuation<Unit> ): Any? { val function = (this as Function3<R, A, Continuation<Unit>, Any?>) return function.invoke(receiver, arg, continuation) } w Ҿ਺Λ"ܕ͔͠ड͚औΒͳ͍͸ͣͷϥϜμࣜ UIJT ͕Կނ͔  Ҿ਺ͱͯ͠"ܕɾ$POUJOVBUJPOͷ̎ͭΛड͚औΔ'VODUJPOܕʹ  Ωϟετ͞Ε͔ͯΒ࣮ߦ͞Ε͍ͯΔ

internal actual inline fun <R, A> ((suspend) R.(A, Continuation<Unit>) ->
Unit). startCoroutineUninterceptedOrReturn3( receiver: R, arg: A, continuation: Continuation<Unit> ): Any? { val function = (this as Function3<R, A, Continuation<Unit>, Any?>) return function.invoke(receiver, arg, continuation) } w ࣮͸ϥϜμࣜ UIJT ͸TVTQFOEϥϜμͳͷͰίϯύΠϧ࣌ʹ͸  Ҿ਺ͱͯ͠$POUJOVBUJPO΋ड͚औΔϥϜμࣜʹม׵͞ΕΔʂ w ͕࣮ͨͬͯ͠ߦ࣌ͷΩϟετ͸੒ޭ͢Δ ੜ੒͞ΕΔίʔυ ٙࣅίʔυ

Unit). startCoroutineUninterceptedOrReturn3( receiver: R, arg: A, continuation: Continuation<Unit> ): Any? { val function = (this as Function3<R, A, Continuation<Unit>, Any?>) return function.invoke(receiver, arg, continuation) } w ࣮͸ϥϜμࣜ UIJT ͸TVTQFOEϥϜμͳͷͰίϯύΠϧ࣌ʹ͸  Ҿ਺ͱͯ͠$POUJOVBUJPO΋ड͚औΔϥϜμࣜʹม׵͞ΕΔʂ w ͕࣮ͨͬͯ͠ߦ࣌ͷΩϟετ͸੒ޭ͢Δ ੜ੒͞ΕΔίʔυ ٙࣅίʔυ ίϯύΠϧޙͷίʔυͷγάωνϟΛ  ༧ଌͯ͠ڧ੍Ωϟετ͍ͤͯ͞Δ

Unit). startCoroutineUninterceptedOrReturn3( receiver: R, arg: A, continuation: Continuation<Unit> ): Any? { val function = (this as Function3<R, A, Continuation<Unit>, Any?>) return function.invoke(receiver, arg, continuation) } w ࣮͸ϥϜμࣜ UIJT ͸TVTQFOEϥϜμͳͷͰίϯύΠϧ࣌ʹ͸  Ҿ਺ͱͯ͠$POUJOVBUJPO΋ड͚औΔϥϜμࣜʹม׵͞ΕΔʂ w ͕࣮ͨͬͯ͠ߦ࣌ͷΩϟετ͸੒ޭ͢Δ ੜ੒͞ΕΔίʔυ ٙࣅίʔυ ࣮͸TUBSU$PSPVUJOF6OJOUFSDFQUFE0S3FUVSOͷ  ࣮૷Ͱಉ͜͡ͱ͕ߦΘΕ͍ͯΔ    ͜ͷํ๏Λࢀߟʹ͢Δͱ  ೚ҙͷ਺ͷҾ਺Λίϧʔνϯ։࢝࣌ʹ  ౉͢Α͏ͳ௿Ϩϕϧ"1*Λ  ࣗ෼Ͱ࣮૷͢Δ͜ͱ͕Ͱ͖Δ

·ͱΊ

$PSPVUJOFTͷ௿Ϩϕϧ"1*ؔ਺ ,UPSͱඇಉظॲཧύΠϓϥΠϯ ,UPSΛ$PSPVUJOFTͰඥղ͘ ϓϥάΠϯػߏͱύΠϓϥΠϯػߏ ϚΠΫϩϑϨʔϜϫʔΫͷࢥ૝

ϚΠΫϩϑϨʔϜϫʔΫͷࢥ૝ w ,UPS͕࠾༻͍ͯ͠ΔϚΠΫϩϑϨʔϜϫʔΫͳઃܭࢥ૝Λ঺հ w ,UPSຊମࣗମ͸8FC"QQ'SBNFXPSLͱͯ͠ඞཁ࠷௿ݶͷ  ػೳ͔࣮͠૷͍ͯ͠ͳ͍ͨΊɺΞϓϦέʔγϣϯ։ൃऀ͕  খ͘͞ߴ଎ʹΞϓϦέʔγϣϯΛ։ൃ͍ͯ͘͠ద͍ͯ͠Δ

ϓϥάΠϯػߏͱύΠϓϥΠϯػߏ w ,UPSͷϝΠϯͷઃܭͰ͋Δ  'FBUVSFʹΑΔϓϥάΠϯػߏͱύΠϓϥΠϯػߏΛ঺հ w ΞϓϦέʔγϣϯ։ൃऀʹඞཁͳػೳʹԠͯ͡ॊೈʹ  ύΠϓϥΠϯΛߏ੒ΛͰ͖ΔΑ͏ͳ"1*Λఏڙ͍ͯ͠Δ

KtorͱඇಉظॲཧύΠϓϥΠϯ w ,UPSͷඇಉظॲཧύΠϓϥΠϯ্ͰதஅॲཧΛ։࢝ͨ͠Γ  ผεϨουͰಈ࡞͢ΔΑ͏ͳίϧʔνϯΛ։࢝ͨ͠ͱ͖ʹ  ύΠϓϥΠϯͷ֤ϑΣΠζ͕ͲͷΑ͏ʹ࣮ߦ͞ΕΔ͔Λ঺հ w QSPFFEϝιουͳͲɺΑΓޮ཰తʹॲཧΛ࣮ߦ͞ΕΔͨΊͷ  "1*͕,UPS͔Βఏڙ͞Ε͍ͯΔ

Coroutinesͷ௿ϨϕϧAPI w ίϧʔνϯͰߴ͍ύϑΥʔϚϯεͳͲΛٻΊΔࡍʹ͸  ॏཁʹͳͬͯ͘ΔΑ͏ͳ௿Ϩϕϧͷ"1*Λ঺հ w $POUJOVBUJPOTVTQFOEؔ਺ͷࣗಈมܗ w TUBSU$PSPVUJOF  TUBSU$PSPVUJOF6OJOUFSDFQUFE0S3FUVSO w
TVTQFOE$PSPVUJOF6OJOUFSDFQUFE0S3FUVSO

KtorΛCoroutinesͰඥղ͘ w ඇಉظॲཧύΠϓϥΠϯͰͷύϑΥʔϚϯεΛ  ͋͛ΔͨΊʹ಺෦తʹίϧʔνϯͷ௿Ϩϕϧ"1*Λ׆༻ͨ͠  ༷ʑͳςΫχοΫΛ঺հ w ,UPSΛ࢖Θͳ͍ΞϓϦέʔγϣϯ΍࡞ΔࡍͰ΋  େྔͷίϧʔνϯΛ࢖ͬͯߴ͍ύϑΥʔϚϯεΛ  ٻΊΒΕΔΑ͏ͳঢ়گͰ͸ࢀߟʹͳΔΑ͏ͳ࣮૷͕ଘࡏ

Coroutinesから紐解くKtorの仕組み / Revealing Ktor with c...

Coroutinesから紐解くKtorの仕組み / Revealing Ktor with coroutines

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