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kotlin-mpp-library-tips
uzzu
February 18, 2019
Technology
1
5.7k
kotlin-mpp-library-tips
Cookpad.apk #2 登壇資料
https://cookpad.connpass.com/event/117054/
uzzu
February 18, 2019
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Transcript
,PUMJO.VMUJ1MBUGPSN-JCSBSZ !V[[V
"HFOEB wܦҢ w,PUMJO.11 .VMUJ1MBUGPSN1SPKFDU ͷ֓ཁ wݱঢ় w5*14ू w ࠓେৎ͚ͩͲ কདྷతʹେมͦ͏ͩͳͱࢥ͏ࣄ
ܦҢ w৽نΞϓϦ͚ͷೝূΞϓϦ՝ۚ౷ׅϥΠϒϥϦ Λ࡞͍ͬͯΔ J04͚ ͜ͷล5FDI$POGΛָ͓͠Έʹ w"OESPJEͰೝূ"1*ΫϥΠΞϯτΞϓϦ՝ۚ ϥΠϒϥϦΛͦΕͧΕݸผʹ࡞ΓɺͦΕΛར༻ऀଆ Ͱܨ͗͜ΜͰ͍ͨ
ܦҢ w"OESPJE༻ͷೝূΞϓϦ՝ۚ౷ׅϥΠϒϥϦͷधཁ ͕ߴ·ͬͨ wͨͩ"OESPJE༻ʹϥΠϒϥϦ࡞ΔࣄͰ͖Δ͕ ΕͰ͖ͯ͠·͏ͷͰઓ͕ͳ͍ w ݱ࣌Ͱࣾधཁແ͍͕ ,PUMJO.11ͷࢼݧӡ༻ ݉ͶͯͬͯΈΔࣄʹ
؆୯ͳ֓ཁ wl&YQFSJNFOUBMGFBUVSFJO,PUMJOBOEz w1MBUGPSNؒͰίʔυΛڞ༗͢Δ +7. "OESPJE +BWB4DSJQU J04 -JOVY 8JOEPXT
.BD FUDʜ wϓϥοτϑΥʔϜඇґଘͳίʔυDPNNPOQSPKFDU ґଘίʔυQMBUGPSNQSPKFDUʹॻ͍͍ͯ͘
Kotlin Source Codes Kotlin / JVM Kotlin / Native Kotlin
/ JS JVM Android Executable Dynamic Library iOS Node.js Browser JS Server app Desktop app etc… Android app iOS(arm32, arm64, emulator x86_64) MacOS(x86_64) Android(arm32, arm64) Linux(x86_64, arm32, MIPS, MIPS little endian) WebAssembly(wasm32) Windows(mingw x86_64) Frontend Web app Server app etc…
Kotlin Source Codes Kotlin / JVM Kotlin / Native Kotlin
/ JS JVM Android Executable Dynamic Library iOS Node.js Browser JS java.util.concurrent.* Handler pthread etc… Promise Coroutines - ඇಉظॲཧ -> abstraction by CoroutineContext GCD
Kotlin Source Codes Kotlin / JVM Kotlin / Native Kotlin
/ JS JVM Android Executable Dynamic Library iOS Node.js Browser JS nghttp2 libcurl etc… Fetch API ktor-client - HTTPClient -> abstraction by HTTPClientEngine NSURLRequest etc… apache Jetty etc… okhttp etc… request node-fetch etc..
None
.VMUJ,PUMJO.VMUJ1MBUGPSN1SPKFDU ݴ͍͍͚ͨͩ
5FDIOPMPHZ4UBDL w(SBEMF ,PUMJOʙ ݱࡏ wLPUMJOTUEMJC LPUMJOYDPSPVUJOFTDPSF LPUMJOYTFSJBMJ[BUJPO LUPSDMJFOU
wLPUMJOUFTU LPUMJOYDPSPVUJOFTUFTU LUPSDMJFOU NPDL NPDLL BTTFSUL LUMJOU wޙQMBUGPSNʹ߹Θͤͯ0L)UUQ
͔͜͜Β5*14ू
(SBEMF1SPKFDU4USVDUVSF wͦͦͲ͏͠Α͏ w·Ͱ,PUMJO%4-ະαϙʔτͩͬͨ w͔ΒͷQSPKFDUTUSVDUVSFͰ͍ͬͯͬͨͱ ͖ͷকདྷతͳϏϧυεΫϦϓτͷϝϯς͕ਏͦ͏ʜ
(SBEMF1SPKFDU4USVDUVSF ➔ܥͷࠒͷQSPKFDUTUSVDUVSFΛ౿ऻ
(SBEMF1SPKFDU4USVDUVSF https://github.com/uzzu/kotlin-mpp-boilerplate
(SBEMF1SPKFDU4USVDUVSF ➔ܥͷࠒͷQSPKFDUTUSVDUVSFΛ౿ऻ ɹBOESPJEϏϧυݻ༗ͷόάʹҾ͔͔ͬΔࣄͳ͍ ɹͷͰศར͚ͩͬͨͲɺطʹमਖ਼͞Ε͍ͯΔ͠ ɹEFQSFDBUFEʹͳͬͨΒΊΑ͏͔ͳͱ͍͏ؾ࣋ͪ
*%&4FUUJOHT *%&্ͰͷVOJUUFTU࣮ߦʹࠔͬͨΒ
LUPSDMJFOU wLPUMJOSFqFDUґଘ όΠφϦαΠζ͕େ͖͘ͳͬͯ͠·͏ʜ ɹ➔ݱঢ়ख͔ͣɻ࣏͍ͨ͠ʜ
LUPSDMJFOUPLIUUQ wϥΠϒϥϦ,PUMJO.11Ͱ࡞ͬͯΔ͚Ͳ ΞϓϦ,PUMJO.11Ͱ࡞͍ͬͯͳ͍ ී௨ͷ"OESPJEΞϓϦ w"OESPJEͷੈքͰ 3FUSPpU "QPMMP 3FBDU/BUJWF FUDʜͱ
ܨ͍͗ͨधཁ͕͋Δ w0L)UUQ$MJFOUͷΠϯελϯεΛڞ༗͍ͨ͠
LUPSDMJFOUPLIUUQ wLUPSDMJFOUPLIUUQͰෆՄ ɹ➔0L)UUQ$MJFOU&OHJOFΛࣗ࡞ͯ͠ ɹɹLUPSDMJFOUքͱ"OESPJEքͰ ɹɹ0L)UUQ$MJFOUΛڞ༗
LPUMJOYTFSJBMJ[BUJPO w(SBEMF1MVHJOͰͷ4FSJBMJ[FS%FTFSJBMJ[FSੜػೳ ΛΘͳ͍ͱ͍͚ͳ͍ఔن͕େ͖͘ͳ͍ BOOPUBUJPOQSPDFTTJOH͠ͳͯ͘ࡁΉͳΒͨ͘͠ͳ͍ ɹ➔+TPO0CKFDUMJLFͳػೳ͋ΔͷͰͦΕΛ͏ ɹɹ(SBEMF1MVHJOBQQMZෆཁʹ͍ͯ͠Δ ɹɹৄࡉhttps://uzzu.github.io/post/kotlin-json-serialization-mini.html
$PSPVUJOFT wͳΜ͔ͩΜͩͰ.VUFYΛΑ͘͏ ೝূपΓฒྻʹΒΕͯࠔΔ ͔ͭQPTUQPOFʹͨ͘͠ͳ͍ ݺͼग़͠ճͰɺฒྻʹݺΕͨશͯͷ࣮ߦίϯς Ωετʹฦ٫͍ͨ͠ ͭ·ΓQVCMJTI SFGDPVOU WJB3Y ͍ͨ͠
$PSPVUJOFT https://github.com/uzzu/kortex
$PSPVUJOFT class CallCount(val value: Int) { override fun equals(other: Any?)
= this === other } var callCount = 0 suspend fun increment(): CallCount { ++callCount delay(10) return CallCount(callCount) } ྫ ϝιουίʔϧ͞ΕͨճΛฦ٫͢Δ͚ͩͷؔ
$PSPVUJOFT @Test fun basicWithHot() = runBlocking(hotInvocation()) { val times =
3 val results = mutableListOf<CallCount>() val jobs = mutableListOf<Job>() repeat(times) { i -> val job = launch { runCatching { withContext(Dispatchers.IO) { withHot("hot") { increment() } } } .onSuccess { results.add(it) } .onFailure { fail("[$i] Exception occurred: $it") } } jobs.add(job) } jobs.forEach { it.join() } assertAll { assertThat(results.size).isEqualTo(times) // શͯͷ࣮ߦContextʹincrement()ͷ݁Ռ͕ฦ٫͞ΕΔ assertThat(results.distinct().size).isEqualTo(1) // ಉҰΦϒδΣΫτ͕ฦ٫͞ΕΔ assertThat(results.distinct()[0].value).isEqualTo(1) // increment()ͷݺग़ճ1ճ } }
$PSPVUJOFT wৄࡉ https://uzzu.github.io/post/hot-coroutines.html
5FTUJOH wجຊతʹDPNNPOʹॻ͘ wDPNNPOʹॻ͍͓ͯ͘ͱɺ֤1MBUGPSNͷVOJU UFTU࣮ߦ࣌ʹ·ͱΊͯVOJUUFTU͕࣮ߦ͞ΕΔ
5FTUJOH$PSPVUJOFT wSVO#MPDLJOHKWNͷΈఏڙ͞Ε͍ͯΔ DPNNPOʹςετॻ͖͍ͨ wݱঢ়UFTUJOGSBͳTVCQSPKFDUΛ࡞ͬͯSVO#MPDLJOHΛ FYQFDUBDUVBMͷܗʹ͍ͯ͠Δ KTͳΒQSPNJTF NPDIBͰ ۩ମతͳίʔυhttps://gist.github.com/uzzu/58cb8bb12c17605017edd01b8498915a
w,PUMJOͳ͍͠$PSPVUJOFT-JCSBSZ্Ͱ ରԠ͕ೖΔ༧ఆʜͱࢥ͍ͬͯΔ͚ͲJTTVFḷ͍ͬͯ͘ͱ ͬͱ͔͔Γͦ͏ͳؾ͕͢Δʜhttps://youtrack.jetbrains.com/issue/KT-19813
͜͜·Ͱ5*14
কདྷతʹେมͦ͏ͩͱࢥ͏ࣄ w,PUMJO/BUJWFͷςετ .PDLL"TTFSULݱঢ়/BUJWFඇରԠͳͷͰ ͪঢ়ଶ
কདྷతʹେมͦ͏ͩͱࢥ͏ࣄ w,PUMJO/BUJWFͷ$*ڥ J04͚ͷςετ࣮ߦՄೳܗࣜͰు͍ͯɺYDSVOͯ͠Ϩ ϙʔτूܭ͍ͯ͠ΔJ04Ϗϧυڥ͕͍Δ ଞͷBSDIJUFDUVSFಉ༷ $*ڥͱςετϨϙʔτूܭͲ͏͢Δ QMBUGPSNຖʹ QJQFMJOFԽͯ͠ΔΜͩͱࢥ͏ ͪΖΜ/BUJWFJ04͚ͩͰͳ͍ͷͰҎԼུ
কདྷతʹେมͦ͏ͩͱࢥ͏ࣄ wͨ͘͞Μ͋ΔͷͰ͓͠·͠ΐ͏ʂ