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ミドルウェアにmrubyを組み込む方法 / How to Embed mruby into Middlewares Written in C
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Kentaro Kuribayashi
July 28, 2017
Technology
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ミドルウェアにmrubyを組み込む方法 / How to Embed mruby into Middlewares Written in C
真夏の技術部&BPR室 TechMTG #3(ペパボ社内勉強会)
Kentaro Kuribayashi
July 28, 2017
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Transcript
ʙγϯϓϧͳαʔόͷ֦ுΛࡐʹઆ໌͠·͢ʙ ܀ྛ݈ଠ(.01FQBCP *OD ਅՆͷٕज़෦#13ࣨ5FDI.5(ʢࣾษڧձʣ ϛυϧΣΞʹmrubyΛΈࠐΉํ๏
(.0ϖύϘגࣜձࣾ ܀ྛ݈ଠ@kentaro औక$50 https://kentarok.org
ຊτʔΫʹΑͬͯಘΒΕΔ͜ͱ w$ͷϓϩάϥϜʹNSVCZΛΈࠐΈɺNSVCZͷεΫϦ ϓτΛ࣮ߦ͢Δํ๏͕Θ͔Γ·͢ wطଘͷϛυϧΣΞʹɺNSVCZΛΈࠐΜͰ֦ுͰ͖ ΔΑ͏ʹͳΓ·͢ wͭ·ΓɺOHY@NSVCZͷΑ͏ͳͷΛ࡞ΕΔΑ͏ʹͳ Δͱ͍͏͜ͱͰ͢Ͷʂʢݪཧతʹʣ
࣍ ֦ு͢ΔϛυϧΣΞ NSVCZΈࠐΈͷखॱ ͓ΘΓʹ
֦ு͢ΔϛυϧΣΞ
FDIPαʔόΛ֦ு͍͖ͯ͠·͢
FDIPαʔόɺΫϥΠΞϯτͷ3VCZͰͷྫ αʔό ΫϥΠΞϯτ
FDIPαʔόɺΫϥΠΞϯτΛ࣮ߦ ೖྗ͞ΕͨจࣈྻΛ ͦͷ··ฦ͚ͩ͢ͷ αʔόɻ
ͳͥFDIPαʔό͔ʁ w࣮ࡍɺ$Ͱॻ͍ͨFDIPαʔόΛ֦ு͠·͢ w͜ͷFDIPαʔόΛɺͨͱ͑OHJOYͷΑ͏ͳϛυϧΣ Ξͩͱࢥ͍ͬͯͩ͘͞ɻݪཧతʹɺಉ͡Α͏ͳΓ ํͰ֦ுͰ͖·͢ w͍͖ͳΓେ͖ͳϛυϧΣΞʹऔΓΜͰͭΒ͍˞ ͷͰɺ؆୯ͳͷΛྫʹ͡Ί͍͖ͯ·͠ΐ͏ ˞$ݴޠͱNSVCZͷࣝʹՃ͑ͯɺରͱͳΔϛυϧΣΞΛ֦ு͢ΔϊϋΔඞཁ͕͋Δ͔Βɻ
NSVCZΛΈࠐΜͩFDIPαʔό ೖྗ͞ΕͨจࣈྻΛ NSVCZͷίʔυͱ͠ ͯධՁ͠ɺ݁ՌΛฦ ͢αʔό
֦ுͨ͠FDIPαʔόͷಛ w༩͑ΒΕͨจࣈྻΛɺNSVCZͷίʔυͱͯ͠ධՁ͢Δ wNSVCZͷίʔυΛ࣮ߦͨ݁͠ՌͷܕΛผͯ͠ɺద ͳจࣈྻΛฦ͢ wFDIPαʔόͷߏମʢ(em * ܕʣͷఏڙ͢Δϝϯό ؔʹNSVCZίʔυ͔Β৮ΕΒΕΔ
NSVCZΈࠐΈͷखॱ
ΈࠐΈͷखॱ ೖྗ͞ΕͨจࣈྻΛNSVCZͷίʔυͱͯ͠ධՁ͢Δ NSVCZͷίʔυͱΈࠐΈରͷϛυϧΣΞͱͷ ؒͰɺΛదͳܕʹม͢Δ NSVCZͷίʔυத͔ΒϛυϧΣΞͷίʔυʹ৮Ε ͍ͨ߹ɺΫϥεͱϝιουΛ࡞͢Δ
MJCNSVCZΛϛυϧΣΞʹΈࠐΉ
ೖྗ͞ΕͨจࣈྻΛ NSVCZͷίʔυͱͯ͠ධՁ͢Δ
ೖྗΛNSVCZͷίʔυͱ࣮ͯ͠ߦ
͔͜͜ΒͲ͏ͬͯઌʹਐΉ͔ʁ
NSVCZͱϛυϧΣΞͷؒͰ ͷܕมΛ͢Δ
ϛυϧΣΞˠNSVCZˠϛυϧΣΞ NSVCZͷ ੈք ϛυϧΣΞͷ ੈք ϛυϧΣΞͷ ੈք (char * ܕͰ
ίʔυΛ͢˞ mrb_valueܕ ͔Βదͳܕม ˞ࠓճͦ͏͍ͯ͠Δ͚ͩͰɺ࣮ࡍʹͦͷଞʹϑΝΠϧΛΘͨ͢ͱ͔͍Ζ͍Ζํ๏͕͋Γ·͢ɻ
mruby_valueܕ͔Βͷܕม ࣮ࡍͷܕΛ ఆ͢Δ ܕ͝ͱʹ ม͍ͯ͘͠
લϖʔδͷิ wࠓճͷྫ؆୯ͳFDIPαʔόͳͷͰɺͲͷܕͰ͋ͬ ͯͯ͢(char * ܕʹม͍ͯ͠·͢ wͨͩ͠ɺݩͷܕ͕Θ͔ΔΑ͏ɺNSVCZίʔυͰͷ ܕ໊Λࣔ͢จࣈྻΛՃ͍ͯ͠·͢ɻ wҰൠతʹɺΈࠐΈରͷϛυϧΣΞ͕ظ͢Δ ܕʹม͍͖ͯ͠·͢
NSVCZίʔυͷத͔Β ϛυϧΣΞͷதʹ৮Δ
FDIPαʔόͷίΞߏମ typedef struct em_t { int reply_count; // ϦΫΤετͷฦ৴ճ char
*reply_prefix; // ϓϩϯϓτͷจࣈྻ mrb_state *mrb; } em; Emߏମͷఆٛ
NSVCZͷίʔυ͔ΒϛυϧΣΞʹ৮Δ NSVCZ͔Β Emߏମͷ ίʔυΛݺͿ Χϯτ͕ ͞Ε͍ͯΔ NSVCZ͔Β Emߏମͷ ίʔυΛݺͿ
ϓϩϯϓτͷ จࣈ͕มԽ
NSVCZʹΫϥεͱϝιουΛຒΊࠐΉ EmΫϥεΛ ࡞Δ EmΫϥεʹ ϝιουΛ࡞Δ
mrb_valueܕ ͔Βదͳܕม NSVCZˠϛυϧΣΞˠNSVCZ ϛυϧΣΞͷ ੈք NSVCZͷ ੈք NSVCZͷ ੈք mrb_valueܕ
ม ͖ͬ͞ͱٯͩͶ
ϝιουΛఆٛ͢Δ Em ߏମΛ औΓग़͢ Em ߏମͷ ϝϯόΛมߋ
ϙΠϯτmrb_stateͷudϝϯό mrb_value em_mrb_method_set_reply_prefix(mrb_state *mrb, mrb_value self); ϝιουఆٛͷγάωνϟҎԼͷ௨ΓͳͷͰɺ em->mrb->ud = self;
// udϝϯό(void *)ܕ // ……snip…… em *obj = (em *)mrb->ud; // ͳͷͰɺऔΓग़͢ͱ͖ʹΩϟετ͢Δ ͋ͱͰ͏ͨΊʹmrb->udʹEmߏମΛೖΕ͓ͯ͘
MJCNSVCZΛ ϛυϧΣΞʹΈࠐΉ
MJCNSVCZΛΈࠐΉ $ gcc src/em.c src/em_server.c \ -Iinclude -Ivendor/mruby/include \ -Lvendor/mruby/build/host/lib
-lmruby \ -o build/echo-mruby ҎԼͷΑ͏ʹϏϧυͯ͠ɺMJCNSVCZΛΈࠐΉ $ git clone
[email protected]
:mruby/mruby.git vendor/mruby $ cd vendor/mruby && rake all NSVCZΛ͖ͬͯͯϏϧυ͢Δ
ͬͱ͍͍ํ๏ˣΛࢀরͷ͜ͱ http://hb.matsumoto-r.jp/entry/2015/02/07/011237
͓ΘΓʹ
͋ͱˣΛΈͯͬͨΒ࡞ΕΔ https://github.com/kentaro/echo-mruby
͓ΘΓʹ w͍͖ͳΓ͍ͭ͝ϛυϧΣΞΛ֦ு͠Α͏ͱ͢Δͱɺ NSVCZͱؔͳ͍ͱ͜ΖͰΘ͔Βͳ͘ͳΔͷͰɺ؆୯ ͳྫͰΈࠐΈΛߦͬͯΈ·ͨ͠ w͓͍ͷϛυϧΣΞͷ֦ுੑʹࠔͬͨΒɺNSVCZΛ ΈࠐΉ͜ͱͰָ͕Ͱ͖ͳ͍͔ߟ͑ͯΈ·͠ΐ͏ w͋ͱɺ͍͍ײ͡ʹόʔϯʂͱΑΖ͘͠
NSVCZΔͷʹϖύϘΊͪΌ࠷ߴ ΤϥʔͰϋϚͬͯࢮΜͰ͚ͨͲɺ @matsumotory @udzura ͷ໊྆ʹฉ͍ͨΒ͙͢ղܾ͠ ͨ