PHPエンジニアによるScalaエンジニアへの転身とその手引き

Slide 1

Slide 1 text

ݪాਅޗ 1)1ΤϯδχΞʹΑΔ4DBMBΤϯδ χΞ΁ͷస਎ͱͦͷखҾ͖ 4DBMBؔ੢4VNNJU

Slide 2

Slide 2 text

Slide 3

Slide 3 text

Slide 4

Slide 4 text

Slide 5

Slide 5 text

Slide 6

Slide 6 text

Slide 7

Slide 7 text

2017/11/11 © ChatWork All rights reserved. 7 $IBU8PSLͱ4DBMBͷؔ܎ ‣ $IBU8PSLͷ4DBMB࠾༻ϓϩμΫτl'BMDPOzϦϦʔε·Ͱͷࣦഊͱ ੒ޭͷྺ࢙ 4DBMB.BUTVSJ w IUUQTTQFBLFSEFDLDPNKJLPIJTUPSZPGGBMDPOUIFXBZUPQSPEVDUJPOSFMFBTF ‣ $IBU8PSLͷ৽ϝοηʔδϯάγεςϜΛࢧ͑Δٕज़ "84%FW %BZ5PLZP w IUUQTTQFBLFSEFDLDPNKJLPDIBUXPSLGBMTFYJONFUVTF[JOHVTJTVUFNVXP[IJ FSVKJTIV ‣ 4DBMBBOE"LLBBQQTPO,VCFSOFUFTJO$IBU8PSL 4DBMBؔ੢ 4VNNJU w IUUQTTQFBLFSEFDLDPNIBZBTTIJTDBMBBOEBLLBBQQTPOLVCFSOFUFTJO DIBUXPSL

Slide 8

Slide 8 text

Slide 9

Slide 9 text

Slide 10

Slide 10 text

Slide 11

Slide 11 text

Slide 12

Slide 12 text

Slide 13

Slide 13 text

Slide 14

Slide 14 text

2017/11/11 © ChatWork All rights reserved. 14 େ͖ͳน ϓϩμΫτίʔυͱ஌ࣝͷဃ཭ def create(implicit scheduler: Scheduler): Flow[CreateUserAccountRequest, CreateUserAccountResponse, NotUsed] = Flow[CreateUserAccountRequest].mapAsync(1) { userAccount => (for { id <- userIdGenerator.generateId() result <- userRepository.store( UserAccount( id, Status.Active, EmailAddress(userAccount.emailAddress), HashedPassword(userAccount.password), userAccount.firstName, userAccount.lastName, Clock.now, None ) ) } yield CreateUserAccountResponse(id.value)).runAsync }

Slide 15

Slide 15 text

2017/11/11 © ChatWork All rights reserved. 15 େ͖ͳน ϓϩμΫτίʔυͱ஌ࣝͷဃ཭ def create(implicit scheduler: Scheduler): Flow[CreateUserAccountRequest, CreateUserAccountResponse, NotUsed] = Flow[CreateUserAccountRequest].mapAsync(1) { userAccount => (for { id <- userIdGenerator.generateId() result <- userRepository.store( UserAccount( id, Status.Active, EmailAddress(userAccount.emailAddress), HashedPassword(userAccount.password), userAccount.firstName, userAccount.lastName, Clock.now, None ) ) } yield CreateUserAccountResponse(id.value)).runAsync }

Slide 16

Slide 16 text

Slide 17

Slide 17 text

Slide 18

Slide 18 text

2017/11/11 © ChatWork All rights reserved. 18 ྫ ؔ਺ͷهड़ελΠϧ͕ෳ਺͋Δ // ܕΞϊςʔγϣϯΛ࢖͏ val toInt: (String => Int) = (s: String) => s.toInt // ܕΞϊςʔγϣϯΛলུ((Ҿ਺) => ຊମ) val toInt2 = (s: String) => s.toInt // ϓϨʔεϗϧμʔΛ࢖༻ͨ͠ܗ val toInt3: (String => Int) = _.toInt w FY TUSJOHΛҾ਺ʹͱͬͯɺJOUʹมߋ͢Δؔ਺ͷهड़ελΠϧʹͯ͠΋਺ύλʔϯ͋ΔΑ͏ ʹࢥ͑ͨ w 1)1ͷ৔߹ w 4DBMBͷ৔߹ $toInt = function(string $s) {return (int)$s;}; ‣ ࢀߟ w IUUQTHJTUHJUIVCDPNHBLV[[[[ w IUUQTRJJUBDPNOFTIFFQJUFNTBFDFFGEG

Slide 19

Slide 19 text

2017/11/11 © ChatWork All rights reserved. 19 ྫ ؔ਺ܕ ‣ FY UP·Ͱͷ੔਺Ͱۮ਺ͷ΋ͷ͚ͩ ح਺͸আ͘ Λഒͯ͠ɺ ͦͷ૯࿨ΛٻΊΔ w 1)1ͷ৔߹ // ᶃarray_**ܥͷؔ਺Λ࢖ͬͨ৔߹ $result = array_sum(  array_map( function ($i) {  return $i * 10;  },  array_filter(range(1, 10), function ($i) {  return ($i % 2 === 0);  })  )  ); // ᶄ݁ہ͜͏ͳΓͦ͏  $result = 0;  foreach (range(1, 10) as $int) {  if ($int % 2 === 0) {  $result += $int * 10;  }  }

Slide 20

Slide 20 text

2017/11/11 © ChatWork All rights reserved. 20 ྫ ؔ਺ܕ def stringMatching(matcher: (String) => Boolean) = matcher("sample text") def stringStart(query: String) = stringMatching(_.startsWith(query)) // ҎԼͱಉٛ // strMatching((str: String) => str.startsWith(query)) def stringContain(query: String) = stringMatching(_.contains(query)) ‣ 4DBMBͷ৔߹ ϫϯϥΠφʔͰهड़Մೳ ‣ ଞͷྫɿ4USJOHΛҾ਺ʹͱΓɺCPPMFBOΛฦؔ͢਺Λ౉͢ (1 to 10).withFilter(_ % 2 == 0).map(_ * 10).sum

Slide 21

Slide 21 text

2017/11/11 © ChatWork All rights reserved. 21 +BWBपΓͷ஌ࣝ ‣ OVMM΁ͷߟྀ w /VMM1PJOUFS&YDFQUJPO͕ൃੜͯ͠͠·͏ w SFUVSOWBMVFPSOVMMͷ+BWBϝιουΛݺͼग़࣌͢ʹ͸0QUJPOBQQMZͰғͬͯ͋ ͛Δ ‣ +BWBϥΠϒϥϦɺύοέʔδͷཧղ w MPHCBDLɺKBWBYDSZQUP w εϨουϓʔϧͷ෼ׂ ‣ FUDʜ akka { dispatcher { type = Dispatcher executor = "thread-pool-executor" thread-pool-executor { fixed-pool-size = 32 } throughput = 1 } }

Slide 22

Slide 22 text

Slide 23

Slide 23 text

2017/11/11 © ChatWork All rights reserved. 23 ॻ੶ɾXFC ڭࡐͰֶश ‣ ݴޠ࢓༷ɺؔ਺ܕ΍ετϦʔϜͷ֓೦ͳͲΛॏ఺తʹֶश ‣ XFC্Ͱͷ৘ใ w 4DBMBશൠ w IUUQTEXBOHPHJUIVCJPTDBMB@UFYU w IUUQTHJUIVCDPNIBUFOB)BUFOB5FYUCPPLCMPCNBTUFS GPVOEBUJPOPGQSPHSBNNJOHTDBMBNE w "LLB4USFBN w IUUQTUIJOLJUDPKQBSUJDMF

Slide 24

Slide 24 text

Slide 25

Slide 25 text

Slide 26

Slide 26 text

2017/11/11 © ChatWork All rights reserved. 26 श࡞ͰຒΊΔ ‣ ΑΓ࣮ફతͳ಺༰ͰϓϩμΫτίʔυͱͷࠩ෼ΛঃʑʹຒΊΔ ‣ श࡞ ՝୊ͷ࣮ࢪ w 4DBMB ࣾ಺ڭࡐ w FY 1MBZ'SBNFXPSLͷԋश՝୊ w "LLB (SBQI4UBHFΛ࢖༻ͯ͠ϑΝΠϧˠ%#΁ͷ؆୯ͳॲཧ w SBNMQBSTFSͷ࡞੒ w FUD ‣ ϥΠϒϥϦ࡞੒ˍΞϓϦέʔγϣϯ։ൃ

Slide 27

Slide 27 text

Slide 28

Slide 28 text

2017/11/11 © ChatWork All rights reserved. 28 4DBMB։ൃͷײ૝ ‣ ੩తܕɺؔ਺ܕͷԸܙ w 1)1Ͱ͸ػೳ௥ՃʹΑΔςετ΍֬ೝ࡞ۀ͕େม Өڹൣғ͕ݟ͑ʹ͍͘ w ϞσϦϯάɺϦϑΝΫλ͠΍͍͢ ‣ ֶश͕ਐΉʹͭΕརศੑΛ࣮ײ w ঺հग़དྷͳ͔͚ͬͨͲ NBUDIDBTF 'VUVSFɺ&JUIFSɺ0QUJPOɺFUDʜ ‣ +BWBͷ๛෋ͳࢿ࢈Λ׆༻Ͱ͖Δ

Slide 29

Slide 29 text

2017/11/11 © ChatWork All rights reserved. 29 ·ͱΊ ‣ 4DBMBΛֶश͔Βೖͬͯ։ൃग़དྷΔ؀ڥ͕͋Δ ‣ ΩϟονΞοϓɺ੒௕ग़དྷΔ؀ڥ͕͋Δ ‣ ʮֶशʯˠʮश࡞ʯˠʮϓϩμΫτʯͱ͍ͬͨΑ͏ʹஈ֊Λ౿Ή͜ ͱ͕Ͱ͖ͨ ‣ ඼࣭͕୲อ͞Εอकɾӡ༻͕͠΍͘͢ͳΔ ‣ ৽ͨͳߟ͑ΛऔΓೖΕΒΕΔ ‣ ੩తɺؔ਺ܕɺඇಉظɺฒߦϓϩάϥϛϯάɺFUDʜ

Slide 30

Slide 30 text

Slide 31

Slide 31 text