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10年でどう変わった? はてなブックマークでのPerlの使い方
INA Lintaro
November 03, 2019
Programming
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10年でどう変わった? はてなブックマークでのPerlの使い方
2019-11-03 YAPC::Nagoya::Tiny 2019
https://yapcjapan.connpass.com/event/146727/
INA Lintaro
November 03, 2019
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Transcript
10ͰͲ͏มΘͬͨ? ͯͳϒοΫϚʔΫͰͷ Perlͷ͍ํ ҏಸ ྛଠ id:tarao @oarat 2019-11-03 YAPC::Nagoya::Tiny
ࣗݾհ ໊લ ɹ ͍ ͳ ҏಸ ɹ ɹ ΓΜͨΖ͏ ྛଠ
ɹ (id:tarao @oarat) 2008-08 ͯͳΠϯλʔϯ (ϒοΫϚʔΫνʔϜ) 2008-10 ͯͳΞϧόΠτ (ϒοΫϚʔΫνʔϜ) 2010-04 ຊֶज़ৼڵձ ಛผݚڀһ (DC1) 2013-04 ͯͳਖ਼ࣾһ 2013-12 ϒοΫϚʔΫνʔϜ (ޙʹςοΫϦʔυ) ▶ ͍͜͠ͱ୲ ▶ ݕࡧٕज़, ػցֶश ▶ ຊདྷͷઐܕཧ ▶ Scala
None
ͯͳϒοΫϚʔΫͷྺ࢙ 2005 ϦϦʔε 2008 ίʔυϕʔεͷϦϥΠτ (DB ͦͷ··) 2013
σβΠϯͷΈϦχϡʔΞϧ 2015 ϑϧϦϥΠτϓϩδΣΫτ։࢝ 2019 ϑϧϦϥΠτྃ (DB ؚΊͯ͢৽)
ϑϧϦϥΠτ։࢝ ▶ ͯͳϒοΫϚʔΫ in Scala. Scala ؔ Summit 2015.
چγεςϜߏ
چγεςϜͰͷࠔΓͲ͜Ζ ▶ ։ൃͷԼ ▶ ίʔυϕʔε͕ڊେ͔ͭࠞಱ .pm 400,000 ߦ / .t
270,000 ߦ / .html 70,000 ߦ / 30+ gitmodules ▶ ϦϑΝΫλϦϯά͕͍͔ͭͳ͍ ▶ ύϑΥʔϚϯε্ͷ ▶ શҬʹӨڹ͢Δ࠶ઃܭ͕ଟඞཁ ▶ αʔόίετͷ૿େ (σΟϨΫλʔ) ཷ·ͬͨύϑΥʔϚϯε issue ͥΜͿΔͱ ͲΕ͘Β͍͔͔Δ? (ΤϯδχΞ) ... ͏·͍ͬͯ͘ 3 ͱ͔Ͱ͔͢Ͷ
৽γεςϜߏ
ϑϧϦϥΠτͷޮՌ ▶ ϨεϙϯελΠϜେ෯্ ▶ αʔόݮ ▶ ϦϦʔεස 1/week → 1/day
▶ ༷ͷཧ
ࠔ͍ͬͯͨͱ͜Ζ ৽γεςϜͰͲ͏ͳͬͨ?
ϚΠΫϩαʔϏεઓུ ࠔ͍ͬͯͨ ▶ ڊେͳϞϊϦε ▶ ෦తͳஔ͖͕͑ࠔ ▶ ੜαʔϏεͷͨΊͷ༷ʑͳίʔυ͕ࠞ͟Δ ▶ ୯Ұݴޠ
▶ Perl Ͱػցֶश͚ͬ͜͏͍ͨΜ... ▶ ඇಉظॲཧ...
ϚΠΫϩαʔϏεઓུ Ͳ͏ͳͬͨ ▶ ௨৴ํ๏ ▶ جຊతʹ HTTP Ͱ JSON ΛΓͱΓ
▶ جຊతʹಉظత ▶ Ͳ͜Ͱ͚Δ͔ ▶ ڥք͚ͮΒΕͨίϯςΩετ ▶ ࠶ར༻ੑ ▶ ݴޠͷҧ͍ ▶ ϦϦʔεαΠΫϧͷҧ͍ ▶ ݴޠબ Scala, Perl, Go, Python ▶ ༻్ʹ߹Θͤͯ࠷దʹબ ▶ ͱͱࣾϚϧνϦϯΨϧͳਓ͕ଟ͍
ݴޠબ Scala ▶ ΞϓϦέʔγϣϯͷίΞͱͳΔόοΫΤϯυ ▶ υϝΠϯϞσϧΛ͏·͘දݱ͍ͨ͠ ▶ Ϗϡʔ෦ΑΓߋ৽ස͕͍ Perl ▶
BFF (Ϗϡʔ෦) ▶ σβΠφ৮ΔͷͰίϯύΠϧΛͪͨ͘ͳ͍ ▶ ༏ઌͰ׳Ε͍ͯΔ/ॻ͚Δਓ͕ଟ͍ͷ ▶ ߋ৽ස͕ߴ͍
ݴޠબ Go ▶ ඇಉظॲཧΛܹ͘͠ඞཁͱ͢Δͱ͜Ζ ▶ ࣮ߦ༏ઌͳͱ͜Ζ ▶ ͳΔ͘ػೳΛখ͘͞࡞Δ Python ▶
ػցֶश͢Δͱ͜Ζ ▶ ։ൃαΠΫϧ͕ଞͱશ͘ҧ͏
δϣϒΩϡʔ ࠔ͍ͬͯͨ ▶ TheSchwartz + WorkerManager (Perl) ▶ ॏ͍δϣϒʹϦιʔεΛ༗͞Ε͕ͪ ▶
δϣϒ͕ཷ·Γ͗͢ΔͱΩϡʔ͕٧·Δ ▶ Scala Ͱ͑ͳ͍ / ݴޠΛ·ͨ͛ͳ͍ ▶ ϫʔΧڥΛյͯ͠͠·͍͕ͪ ▶ ίʔυϕʔεڞ௨ ▶ ڥηοτΞοϓ͕·Δ͖ΓҟͳΔ ▶ ಈ࡞֬ೝ/खͰδϣϒೖ͕͍ͨΜ
δϣϒΩϡʔ Ͳ͏ͳͬͨ: HTTP ϕʔεͷδϣϒΩϡʔΛ৽ ▶ Fireworq (Go) ▶ Ωϡʔͷॲཧʹઐ೦ ▶
ෳΩϡʔΛఆٛՄೳ (ॏ͍δϣϒΛִ) ▶ ಉ࣌ଓϫʔΧΛಈతʹઃఆՄೳ ▶ ϫʔΧ௨ৗͷ HTTP όοΫΤϯυ (࣮ߦ༰қ) ▶ Go ͱ MySQL Λ༻͍ͨδϣϒΩϡʔγεςϜΛ࡞Δͱ͖ʹߟ͑ͨ͜ͱ Ώ͏͏͖ϒϩά. 2014-12-04.
τϥϯβΫγϣϯ ࠔ͍ͬͯͨ ▶ τϥϯβΫγϣϯॲཧΛ͍ͯ͠ͳ͔ͬͨ ▶ ࠷ॳ MyISAM ͩͬͨͷͰ... ▶ ෆ߹͕ى͖Δ͜ͱ͋ͬͨ
▶ JSON Λڝ߹ͯ͠ॻ͖ࠐΜͰ ϑΟʔϧυ͕ফ͑Δͱ͔... sub write_key_value { # ˞ࣜతͳίʔυ my ($db, $obj id, $field, $value) = @ ; my $row = $db->select_row(qq{ SELECT * FROM some_table WHERE id = ? }, [ $obj id ]); my $json = $row->{json} ? decode json $row->{json} : {}; $json->{$field} = $value; # ॻ͖ࠐΉϑΟʔϧυ͍Ζ͍Ζ $db->query(qq{ UPDATE some_table SET json = ? WHERE id = ? }, [ encode json $json, $obj id ]); }
τϥϯβΫγϣϯ Ͳ͏ͳͬͨ ▶ খ͍͞୯ҐͰͨΓલʹτϥϯβΫγϣϯ ▶ େ͖͍୯ҐͰ݁Ռ߹ੑΛલఏͱ͢Δ ▶ UI ͳͲͦΕલఏͰߟ͑Δ “
ͻͱͭͷํ๏ͱͯ͠ɺ࣮ߦͨ͠ίϚϯυͷύϥϝʔλͱͯ͠ ͨ͠σʔλΛɺϢʔβʔΠϯλʔϑΣΠεʹҰ࣌తʹදࣔͤ͞Δ Α͏ͳઃܭ͕͋ΔɻଟগτϦοΩʔ͕ͩɺ࠷ऴతʹΫΤϦϞσϧ ʹө͞ΕΔͰ͋Ζ͏σʔλΛɺϢʔβʔ͕͙͢ʹݟΒΕΔΑ͏ ʹͳΔɻίϚϯυͷ࣮ߦ͕ޭͨ͠ͱ͖ʹɺ࣮ߦલͷݹ͍σʔλ ΛͲ͏ͯ͠ݟͤͨ͘ͳ͍ͷͳΒɺ͓ͦΒ͘͜Ε͕།Ұͷํ๏ͩ Ζ͏ɻ ▶ ࣮ફυϝΠϯۦಈઃܭ 4.6 ίϚϯυΫΤϦ (CQRS) - ΫΤϦϞσϧͰͷ݁Ռ߹ੑͷѻ͍
ɹ υϝΠϯۦಈઃܭ DDD ɹ — ϨΠϠʔ ࠔ͍ͬͯͨ ▶ ϑΝ οτϞσϧ,
ϑΝ οτίϯτϩʔϥ ▶ ʮΞϓϦέʔγϣϯʯͷׂ͕͙͙ͪ Ͳ͏ͳͬͨ (ओʹ Scala ଆ) ▶ ΫϦʔϯΞʔΩςΫνϟͳͲΛલఏʹΞϨϯδ ▶ ΞϓϦέʔγϣϯͱԿ͔Λ͔ͳΓٞ ▶ ࢦΛυΩϡϝϯτԽ ▶ Perl ଆͷ͚ํେࡶ
ɹ υϝΠϯۦಈઃܭ DDD ɹ — ɹ υϝΠϯΦϒδΣΫτ DO ɹ ࠔ͍ͬͯͨ
— ϑΝ οτϞσϧ ▶ 1 ͭͷΤϯςΟςΟͷΫϥε͕ 5000 ߦऑ ▶ ϝιου͕ͲΜͳ෭࡞༻Λى͔͜͢Θ͔Βͳ͍ Ͳ͏ͳͬͨ — DO ؆ܿʹ ▶ ݪଇͱͯ͠ෆม (ॻ͖͚͑ͨΕίϐʔ) ▶ (Scala) case class ▶ (Perl) Class::Accessor::Lite (::Lazy) ▶ ϑΟʔϧυͷՃ? ▶ (Scala) ަࠩܕͰ (ࣅඇ) ֦ுՄೳϨίʔυ ▶ (Perl) Class::Mix Ͱಈతܧঝ (Scala ͷަࠩܕͰ͍ͬͯΔ͜ͱͷಈత൛)
ɹ υϝΠϯΦϒδΣΫτ DO ɹʹϑΟʔϧυՃ? ͲΜͳͱ͖? ▶ Կ͔ࢠཁૉΛՃ͑ͨͷʹݴٴ͍ͨ͠ͱ͖ ▶ ࢠཁૉΛՃ͑ͨͱ͖͚ͩࢀরͰ͖ͯ΄͍͠ ྫ
my $car = Car->new(...); my $car_with_engine = $car->with_engine($engine); give_me_engine($car_with_engine->engine); my $car_with_bumper = $car->with_bumper($bumper); give_me_bumper($car_with_bumper->bumper); #give_me_engine($car_with_bumper->engine); # Τϥʔʹ͍ͨ͠ my $car_with_engine_and_bumper = $car->with_engine($engine)->with_bumper($bumper); give_me_engine($car_with_engine->engine); give_me_bumper($car_with_bumper->bumper);
ɹ υϝΠϯΦϒδΣΫτ DO ɹʹϑΟʔϧυՃ? package Class::Extensible; use Class::Mix qw(mix_class); sub
import { my $package = caller; *{"${package}::clone_with"} = sub { # Class::Mix ͰΫϥεΛ߹͢Δίʔυ # શͳίʔυ: https://git.io/JeuHU } } package Car; use Class::Accessor::Lite (new => 1); use Class::Extensible qw(clone_with); sub with_engine { $_[0]->clone_with(’WithEngine’, engine => $_[1]); } package Car::WithEngine; use parent qw(Car); use Class::Accessor::Lite (new => 1, ro => [qw(engine)]);
ɹ υϝΠϯۦಈઃܭ DDD ɹ — จԽͷܧঝ ࠔ͍ͬͯͨ id:naoya ᐌ͘ “
υϝΠϯϩδοΫΛ App::* ʹ࣮͠ͳ͍͜ ͱɻ͋͘·ͰϩδοΫجຊ Service::* ͔ MoCo::* ▶ Կ͕υϝΠϯϩδοΫͰԿ͕ͦ͏Ͱͳ͍͔? ▶ νʔϜͰٞͰ͖͍ͯͳ͔ͬͨ ▶ ͕ͯݴ͍͑ͦͷͷ͕ࣦΘΕ... ▶ Ͳ͜·Ͱ͕υϝΠϯϩδοΫ͔ᐆດͩͬͨΓ ▶ App::*͕ϏϡʔͷͨΊ͚ͩʹͳͬͯͨΓ ▶ ίϯτϩʔϥͰυϝΠϯૢ࡞͍ͯͨ͠Γ
ɹ υϝΠϯۦಈઃܭ DDD ɹ — จԽͷܧঝ Ͳ͏ͳͬͨ ▶ ࣾษڧձͷ։࠵ ▶
νϡʔτϦΞϧతͳυΩϡϝϯτΛ֦ॆ ▶ ԿΛͲ͜ʹॻ͔͘ͷࢦΛఏڙ ▶ νʔϜͷಋೖࢿྉͱͯ͠ಡΉ ▶ ʑυϝΠϯϞσϧ͕ద͔Ͳ͏͔ٞ ▶ ϢϏΩλεݴޠͱͷဃʹ͍ͭͯٞ (ຊདྷͷ DDD ͷత)
ް͍FW͔Βͷ٫ ࠔ͍ͬͯͨ — ް͍ϑϨʔϜϫʔΫ ▶ Ridge (WAF) ▶ Ruby on
Rails ͷ ActionPack ϦεϖΫτ ▶ DBIx::MoCo (ORM) ▶ Ruby on Rails ͷ ActiveRecord ϦεϖΫτ ▶ ࣾͰͷར༻ࣄྫ͕ͩΜͩΜݮগ ▶ ࣝऀ͕ݮͬͯݟ͕ͳ͘ͳΔ ▶ ϝϯς͍ͨΜʹ ▶ ͩΜͩΜ͔Β֎Εͨར༻͕૿Ճ “ ڍಈ͕ҙຯෆ໌ ϚδΧϧͳ͜ͱΓ͕ͪ ▶ ΅͘ͷ͔Μ͕͍͖͑ͨ͞ΐ͏ͷ͏͐Ϳ͋Γ͚ʔ͠ΐΜ;ΕʔΉΘʔ͘ id:cho45. YAPC Asia 2011.
ް͍FW͔Βͷ٫ ࠔ͍ͬͯͨ — WAF ▶ Ridge ▶ ҉ͷσΟεύονϧʔϧ (ྫ) /user/add.confirm
→ Engine::User::Add->confirm ▶ ςϯϓϨʔτ͚ͩஔ͍ͯ༗ޮ ▶ ࡉ͔ͳมଇϧʔϧ (.json → json ) ▶ ͲͷΤϯυϙΠϯτ͕༗ޮͳͷ͔͍͠ ▶ before filter, after filter ▶ DRY ͷͨΊͷΜΓػೳͱͯ͠ཚ༻ ▶ ύεͷॻ͖͑ʹ͏ύλʔϯ... ▶ ΞΧϯτج൫ͷϞδϡʔϧ͕͜ΕΛܧঝ...
ް͍FW͔Βͷ٫ Ͳ͏ͳͬͨ — WAF ▶ Plack + Router::Simple + ͘͝؆୯ͳ
DSL ▶ ͯ͢ͷϧʔςΟϯάΛ໌ࣔతʹॻ͘ GET "/{user name:$HATENA ID RE}/add" => require_login => "User" => "add"; GET "/entry/panel/" => session => "Entry::Panel" => "panel"; ▶ ύε͝ͱͷ Plack::Middleware తͳͷ ▶ ྫ => require login ະϩάΠϯ 302 ▶ ίϯςΩετΦϒδΣΫτʹ Role::Tiny ▶ ྫ => session ϝιου->visitor ͕ੜ͑Δ
ް͍FW͔Βͷ٫ ࠔ͍ͬͯͨ — ORM ▶ DBIx::MoCo ▶ มߋηογϣϯྃ࣌ʹ·ͱΊͯॻ͖ग़͠ ▶ ͕ͩଈॻ͖ग़͢->save
͕ݺΕ͕ͪ ▶ ΠϯελϯεΩϟ ογϡͷΈ͕͋Δ ▶ ͕ͩΩϟ ογϡճආ൛ϝιου͕ݺΕ͕ͪ ▶ τϦΨͷΈͰϋϚΓ͕ͪ ▶ Ͳ͜Ͱ DB ΞΫηε͕Δͷ͔Θ͔Γʹ͍͘ ▶ N+1 ΫΤϦ ▶ ͔Ώ͍ͱ͜Ζʹख͕ಧ͔ͣੜΫΤϦॻ͖͕ͪ
ް͍FW͔Βͷ٫ Ͳ͏ͳͬͨ — ORM Θͳ͍ ▶ (Scala) Slick ▶ (Perl)
DBIx::Handler + Scope::Container ▶ ΫΤϦੜͰॻ͘ ▶ N+1 ΫΤϦʹର͢Δ݁ ▶ has-a ؔΛ 1 ͚݅ͩҾ͘ϝιου͕Α͘ͳ͍ ▶ ෳ݅Ҿ͘ϝιου͔͠ͳ͚Ε΄΅ແ ˞શମͷॻ͖ํͷελΠϧʹΑΓ·͢
Perlͷόʔδϣϯ ࠔ͍ͬͯͨ ▶ 5.8 ▶ ͳ͔ͳ্͔͛ΒΕͳ͔ͬͨ ▶ ͦͦ CentOS 5
/ mod perl / yum ڥ ▶ Plack Խ / cpanfile Խ / Docker Խ → ࣦഊ Ͳ͏ͳͬͨ ▶ 5.2x ▶ ً͕͍ͯͯ͢ݟ͑Δ...
ͦͷଞ ▶ Ϟδϡʔϧͷಈతϩʔυͷ͍ͤͰϋϚΔ ▶ → ͳΔ͘Βͳ͍ ▶ σουίʔυ͕ଟ͔ͬͨ ▶ →
͋ͱͰ͘͢͝ࠔΔͷͰফ͢, ͍·͙͢! ▶ Elasticsearch ͷόʔδϣϯ্͛ΒΕͳ͍ ▶ API ͕มΘΔͱै͕͍ͨΜ ▶ ݕূ͕͍ͨ͘͢͝Μ ▶ → Scala ΫϥΠΞϯτܕ͖ͳͷͰ҆৺ ▶ Twitter ߘͷจࣈ੍ݶ ▶ Perl Ͱ࠶ݱ͢Δͷඇৗʹ͍͠ ▶ → Scala ͔Βެࣜ Java ύοέʔδΛར༻
ϓϩδΣΫτΛͲ͏ਐΊ͔ͨ
ਐΊํ 1. PoC ϑΣʔζ 2. ࣾϦϦʔε 3. ஈ֊తͳຊ൪ϦϦʔε 4. ϓϩδΣΫτͷऩଋ
ɹ ֓ ೦ ࣮ ূ PoC ɹϑΣʔζ (2015ʙ) ઃܭ ▶
DB εΩʔϚͱجຊΞʔΩςΫνϟͷૉҊ ▶ ϨϏϡʔ ▶ CTO ▶ νʔϑΤϯδχΞ ▶ Πϯϑϥ෦ ▶ چγεςϜࣝऀ ࣮ ▶ ࣺͯΔͭΓͷԾ࣮Λ։࢝ ▶ ྑ͍ϓϥΫςΟεΛࡧ ▶ ͜͜·ͰͰͨ͠Α͏ͳΓํΛ΄΅֬ఆ ▶ ͏·͍ͬͨͨ͘Ί͚͖ͬΐࣺͯͣ͘ʹར༻
ࣾϦϦʔε (ʙ2016) ▶ جຊػೳ͕ͻͱ௨Γಈ͘ঢ়ଶ·Ͱ࣮ ▶ ϒοΫϚʔΫͰ͖Δ ▶ ࣗͷϒοΫϚʔΫҰཡ͕ݟΒΕΔ ▶ ίϝϯτҰཡ͕ݟΒΕΔ
▶ ਓؾΤϯτϦҰཡ͕ݟΒΕΔ ▶ ͬͯΈΔ ▶ σʔλਅͬ৽ ▶ ઐ༻ϒοΫϚʔΫϨοτΛ࡞ ▶ ࣾάϧʔϓΣΞͳͲͰར༻ͯ͠ΈΔ ▶ ։ൃํࣜ: ී௨ͷ৽ن։ൃͷΞδϟΠϧͱಉ͡
ஈ֊తͳຊ൪ϦϦʔε (ʙ2018) ϦϦʔεઓུ ▶ ໘͝ͱʹ৽γεςϜʹΓସ͑ ▶ ·ͣࢀরܥͷΈΛରͱ͢Δ σʔλಉظ ▶ σʔλ৽چ྆ํʹμϒϧϥΠτ
▶ ໘Ͱඞཁͳσʔλ͝ͱʹҠߦ ▶ ΦϯϥΠϯಉظ։࢝ → όονҠߦ
ϓϩδΣΫτͷऩଋ (ʙ2019) ΓͷΓସ͑ ▶ API ͷΈͷػೳ ▶ ඇಉظॲཧͷΈͰΘΕΔॲཧ ▶ ߋ৽ܥ
શΓସ͑ ▶ چϦιʔε͝ͱʹશґଘؔΛચ͍ग़͠ ▶ ΤϯυϙΠϯτ ˠ ΤϯςΟςΟ/Ϧιʔε ▶ ґଘؔΛసஔ ▶ ֤Ϧιʔε issue ʹ࣮ issue Λྻڍ ▶ ґଘ͕ͳ͘ͳͬͨچϦιʔε͔Βॱ࣍ఫୀ
ϓϩδΣΫτͷऩଋ ચ͍ग़͠࡞ۀ ▶ 2ʙ3ϲ݄͔͚ͯશιʔείʔυΛಡΉ ▶ ݁ՌΛεϓϨουγʔτʹ·ͱΊΔ ▶ υϝΠϯ͕ࣝνʔϜϝϯόʔʹߦ͖Δ
ϓϩδΣΫτͷऩଋ ਐߦཧ ▶ Δ͜ͱͷ૯ྔ (είʔϓ) ܾ·͍ͬͯΔ ▶ ΥʔλʔϑΥʔϧత ▶ ༷Λཧͯ͠ॏཁͷ͍ػೳΛഇࢭ
▶ ରίετͰ༏ઌ͚ͮ ▶ ΞδϟΠϧత
·ͱΊ ▶ ͍·ྑ͍ͱࢥ͑ΔͷΛͨΓલʹ࡞Δ ▶ কདྷͬͱΑ͘͢Δ͜ͱΛߟ͑Δ ▶ ͍·ྑ͍ͱߟ͍͑ͯΔཧ༝Λड͚ܧ͙ ▶ ෦తʹࣺͯΒΕΔΑ͏ʹ͢Δ ▶
ϨΨγʔίʔυͷߟݹֶؾ߹͍