今こそ知りたいSpring DI×AOP / spring-di-aop-for-every-developers

動画はこちら→ https://www.youtube.com/watch?v=LGtdpsmMfvI

#jsug Spring Fest 2020での発表資料です。
Springの根幹機能はDIとAOPです。しかし、普通に使っているだけだと「@Autowiredを付ければ代入されるんでしょ？」「@Transactionalを付ければ割り込みされるんでしょ？」くらいの曖昧な理解に陥りがちです。
このセッションでは、DIやAOPの重要機能や仕組みを丁寧に解説します。Springの根幹を理解して、初級者から中級者へ、中級者から上級者へステップアップしましょう！

※発表では無かった内容を[おまけ]として加えました

Transcript

1. (C) CASAREAL, Inc. All rights reserved.
   KTVH
   ࠓͦ͜஌Γ͍ͨ
   4QSJOH%*º"01
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   1
   

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2. (C) CASAREAL, Inc. All rights reserved.
   KTVH
   ͜ͷηογϣϯʹ͍ͭͯ
   ▸ 4QSJOHͷجૅதͷجૅͰ͋Δʮίϯςφʯʮ%*ʯ
   

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   ▸ جຊతʹॳ৺ऀ޲͚Ͱ͕͢ɺ4QSJOHΛར༻͍ͯ͠Δ
   

   શͯͷํ͕ର৅Ͱ͢
   ▸ 4QSJOH'SBNFXPSL4QSJOH#PPU
   

   Ͱݕূ͍ͯ͠·͢
   ▸ όʔδϣϯ͕ҟͳΔ৔߹ɺ಺༰΋ҟͳΔՄೳੑ͕͋Γ·͢
   2
   

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3. (C) CASAREAL, Inc. All rights reserved.
   KTVH
   ࣗݾ঺հ
   ▸ ଟాਅහʢ!TVLF@NBTBʣ
   ▸ ݚमτϨʔφʔ!ΧαϨΞϧ
   ▸ +BWB4QSJOH(PMBOH
   

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   ▸ 7.XBSFೝఆߨࢣ
   ▸ ೔ຊ4QSJOHϢʔβձελοϑ
   3
   

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4. (C) CASAREAL, Inc. All rights reserved.
   KTVH
   ໨࣍
   ᶃ 4QSJOHͷίϯςφͱ͸
   ᶄ %*ͱ͸
   ᶅ είʔϓͱ͸
   ᶆ ϓϩΩγͱ͸
   ᶇ "01ͱ͸
   4
   

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5. (C) CASAREAL, Inc. All rights reserved.
   KTVH
   ໨࣍
   ᶃ 4QSJOHͷίϯςφͱ͸
   ᶄ %*ͱ͸
   ᶅ είʔϓͱ͸
   ᶆ ϓϩΩγͱ͸
   ᶇ "01ͱ͸
   5
   

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6. (C) CASAREAL, Inc. All rights reserved.
   KTVH
   4QSJOH͸ίϯςφΛ͍࣋ͬͯΔ
   ▸ ίϯςφʹΠϯελϯεͷೖΕ෺
   ▸ #FBOʹίϯςφͰ؅ཧ͞ΕͨΠϯελϯε
   6
   ίϯςφ
   #FBO #FBO #FBO
   #FBO #FBO
   ˞ʮΠϯελϯεʯͱ͸ɺ
   

   ɹ΋ͪΖΜ+BWBͷΠϯελϯεͷ
   

   ɹ͜ͱͰ͢
   ඞཁʹԠͯ͡
   

   औΓग़ͯ͠࢖͏
   

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7. (C) CASAREAL, Inc. All rights reserved.
   KTVH
   ίϯςφ͸શ4QSJOHϓϩμΫτͷϕʔε
   ▸ ྫɿ4QSJOH.7$͸DispatcherServlet಺ʹ
   

   ɹɹίϯςφΛ͍࣋ͬͯΔ
   7
   DispatcherServlet
   ίϯςφ
   7
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   औΓग़ͯ͠࢖͏
   View
   

   Resolver
   Handler
   

   Mapping
   ɾɾɾ
   

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8. (C) CASAREAL, Inc. All rights reserved.
   KTVH
   ίϯςφͷػೳ ৄࡉ͸ޙड़
   
   ᶃ %FQFOEFODZ*OKFDUJPO
   ᶄ είʔϓͷ؅ཧ
   ᶅ ϓϩΩγͷ࡞੒
   8
   

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9. (C) CASAREAL, Inc. All rights reserved.
   KTVH
   #FBOΛఆٛ͢Δํ๏
   ᶃ ίϯϙʔωϯτεΩϟϯ
   ᶄ +BWB$PO
   f
   i
   H
   ᶅ ؔ਺ܕ#FBOఆٛ ࠓճ͸ׂѪ
   
   ᶆ 9.- ࠓճ͸ׂѪ
   
   9
   ͜ΕΒͷํ๏͸ɺશͯซ༻Մೳʂ
   

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10. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    #FBOఆٛํ๏ᶃ
    

    ίϯϙʔωϯτεΩϟϯ
    ▸ ίϯϙʔωϯτεΩϟϯ
    

    ʹࢦఆ͞Εͨύοέʔδ͔Β@Component͕
    

    ɹ෇͍ͨΫϥεΛ୳͢
    ▸ ݟ͚ͭͨΒΠϯελϯεԽˠίϯςφʹอଘ
    10
    

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11. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ▸ ӈهͷΞϊςʔγϣϯΛ
    

    Ϋϥεʹ෇͚Δͱɺ
    

    @ComponentΛ෇͚ͨ
    

    ͜ͱͱಉ͡ʹͳΔ
    ▸ Ϋϥεͷ໾ׂʹԠͯ͡
    

    ม͑Δ
    11
    @Repository
    
    
    @Service
    
    
    @Controller
    
    
    @RestController
    
    
    @Configuration
    
    
    @ControllerAdvice
    
    
    @RestControllerAdvice
    
    
    ɾɾɾ
    #FBOఆٛํ๏ᶃ
    

    ίϯϙʔωϯτεΩϟϯ
    ˞͜ΕΒͷΞϊςʔγϣϯͷιʔείʔυΛಡΉͱɺ
    

    ɹ@Component͕෇͍͍ͯΔ͜ͱ͕෼͔Γ·͢
    

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12. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    #FBOఆٛํ๏ᶃ
    

    ίϯϙʔωϯτεΩϟϯ
    12
    package com.example;
    
    
    @Component
    
    
    public class Hoge { ... }
    @Configuration
    
    
    @ComponentScan(basePackages = "com.example")
    
    
    public class AppConfig {}
    ▸ #FBOͱ͍ͨ͠Ϋϥε
    ▸ ઃఆΫϥε +BWB$PO
    f
    i
    H
    
    @Component͕
    

    ෇͍ͨΫϥεΛ
    

    ୳͢ύοέʔδ
    

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13. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    #FBOఆٛํ๏ᶃ
    

    ίϯϙʔωϯτεΩϟϯ
    ▸ ίϯϙʔωϯτεΩϟϯൣғ͸ɺbasePackagesͰ
    

    ࢦఆͨ͠ύοέʔδͷαϒύοέʔδҎԼ΋ؚΉ
    13
    @Configuration
    
    
    @ComponentScan(
    
    
    basePackages =
    
    
    "com.example")
    
    
    public class AppConfig {}
    com
    example
    foo
    bar
    baz
    εΩϟϯൣғ
    

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14. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    #FBOఆٛํ๏ᶃ
    

    ίϯϙʔωϯτεΩϟϯ
    ▸ basePackagesΛࢦఆ͠ͳ͔ͬͨ৔߹ɺ
    

    @ComponentScan͕෇͍ͨΫϥεͷύοέʔδ
    

    ͕basePackagesͱͳΔ
    14
    package com.example.config;
    
    
    @Configuration
    
    
    @ComponentScan CBTF1BDLBHFTແ͠
    
    
    public class AppConfig {}
    ͜Ε͕
    basePackages
    
    
    ʹͳΔʂ
    

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15. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    #FBOఆٛํ๏ᶄ+BWB$PO
    f
    i
    H
    ▸ +BWB$PO
    f
    i
    HΫϥεʹϝιουΛ࡞੒͠ɺ
    

    @BeanΛ෇Ճ͢Δ
    

    ˠϝιουͷ໭Γ஋͕#FBOʹͳΔ
    15
    !$PNQPOFOU4DBO͸ෆཁ
    @Configuration
    
    
    public class AppConfig {
    
    
    @Bean
    
    
    public Hoge hoge() {
    
    
    return new Hoge();
    
    
    }
    
    
    }
    !$PNQPOFOU͸ෆཁ
    public class Hoge {
    
    
    ...
    
    
    }
    

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16. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ίϯςφΛ࡞Δɾ#FBOΛऔಘ͢Δ
    ▸ +BWB$PO
    f
    i
    HΫϥεΛࢦఆͯ͠
    

    ApplicationContext ίϯςφ
    Λ࡞੒
    ▸ ίϯϙʔωϯτεΩϟϯɾ+BWB$PO
    f
    i
    HͲͪΒͰ΋ڞ௨
    ▸ getBean()Ͱ#FBOΛऔಘͰ͖Δ
    16
    ίϯςφͷ࡞੒
    ApplicationContext context =
    
    
    new AnnotationConfigApplicationContext(AppConfig.class);
    
    
    #FBOΛ%*ίϯςφ͔ΒऔಘʢҾ਺͸ཉ͍͠#FBOͷσʔλܕʣ
    Hoge hoge = context.getBean(Hoge.class);
    

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17. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ίϯςφ࡞੒ͰߦΘΕΔ͜ͱ
    ▸ ίϯϙʔωϯτεΩϟϯͷ৔߹
    @Component͕෇͍ͨΫϥεΛ୳͢
    ݟ͚ͭͨΒΠϯελϯεԽ
    ίϯςφʹอଘ
    ▸ +BWB$PO
    f
    i
    Hͷ৔߹
    @BeanϝιουΛ࣮ߦ
    ໭Γ஋Λίϯςφʹอଘ
    17
    ίϯςφ࡞੒͸
    

    ॏ͍ॲཧͳͷͰɺ
    

    ౓ίϯςφΛ
    

    ࡞੒ͨ͠Β
    

    ͦΕΛ࢖͍ճ͢ʂ
    ˞࣮ࡍʹ͸ɺΠϯελϯεੜ੒ͷλΠϛϯά͸
    

    ɹείʔϓʢޙड़ʣʹΑͬͯҟͳΓ·͢ɻ
    

    ɹ͜͜Ͱઆ໌͍ͯ͠Δͷ͸singletonείʔϓͷ৔߹Ͱ͢
    

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18. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    4QSJOH#PPUͷ৔߹
    18
    package com.example;
    
    
    @SpringBootApplication
    
    
    public class MyApplication {
    
    
    public static void main(String[] args) {
    
    
    ίϯςφͷ࡞੒
    ApplicationContext context =
    
    
    SpringApplication.run(MyApplication.class);
    
    
    }
    
    
    }
    ͜Ε͕basePackages
    @Configuration
    
    
    @ComponentScan
    
    
    @EnableAutoConfiguration
    
    
    Λ૊Έ߹ΘͤͨΞϊςʔγϣϯ
    ˞@EnableAutoConfigurationʹ͍ͭͯ͸ԼهࢿྉΛࢀর
    

    ɹIUUQTXXXTMJEFTIBSFOFUNBTBUPTIJUBEBTQSJOHCPPUKKVH
    

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19. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    <͓·͚>#FBO*%ͱ͸
    ▸ ֤#FBOΛࣝผ͢ΔͨΊͷ*%
    ▸ #FBOऔಘͳͲʹ࢖͏ʢۙ೥͸໓ଟʹ࢖Θͳ͍ʣ
    

    ▸ !$PNQPOFOUͰ#FBOఆٛͨ͠৔߹ɺ
    

    ʮΫϥε໊ͷ಄จࣈΛখจࣈʹͨ͠΋ͷʯ͕#FBO*%
    ▸ !#FBOͰ#FBOఆٛͨ͠৔߹ɺϝιου໊͕#FBO*%
    19
    Hoge hoge = (Hoge) context.getBean("Bean ID");
    

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20. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    <͓·͚>#FBO*%ͱ͸
    20
    @Component
    
    
    public class FooBar { ... }
    @Component("foo_bar")
    
    
    public class FooBar { ... }
    @Configuration
    
    
    public class FooConfig {
    
    
    @Bean
    
    
    public FooBar fooBar() { ... }
    
    
    @Bean(name = "foo_bar")
    
    
    public FooBar fooBar2() { ... }
    
    
    }
    fooBar
    foo_bar
    fooBar
    foo_bar
    #FBO*%
    

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21. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ίϯςφͷ·ͱΊ
    ▸ ίϯςφʹΠϯελϯε #FBO
    ͷೖΕ෺
    ▸ ίϯϙʔωϯτεΩϟϯ
    ▸ @ComponentͰ#FBOʹ͢ΔΫϥεΛࢦఆɺ
    @ComponentScanͰ୳͢ൣғΛࢦఆ
    ▸ +BWB$PO
    f
    i
    H
    ▸ @BeanΛ෇Ճͨ͠ϝιουͷ໭Γ஋͕#FBOʹͳΔ
    21
    

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22. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ໨࣍
    ᶃ 4QSJOHͷίϯςφͱ͸
    ᶄ %*ͱ͸
    ᶅ είʔϓͱ͸
    ᶆ ϓϩΩγͱ͸
    ᶇ "01ͱ͸
    22
    

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23. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ίϯςφͷػೳ ࠶ܝ
    
    ᶃ %FQFOEFODZ*OKFDUJPO
    ᶄ είʔϓͷ؅ཧ
    ᶅ ϓϩΩγͷ࡞੒
    23
    

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24. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    %FQFOEFODZ*OKFDUJPOͱ͸
    ▸ ೔ຊޠͰݴ͏ͱ
    24
    ґଘੑͷ஫ೖ
    

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25. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    25
    

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26. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    %FQFOEFODZ*OKFDUJPOͱ͸
    26
    ґଘੑͷ஫ೖ
    ඞཁͳΠϯελϯε ࣗಈత
    ୅ೖ
    

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27. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    OFX͠ͳ͍Ͱ୅ೖͯ͠΋Β͏ʹ%*
    27
    PCK"
    PCK#
    PCK"
    PCK#
    ୅ೖ
    OFX
    ⭕
    ❌
    ▸ %*͸ɺ#FBOੜ੒࣌ʹίϯςφ͕ߦ͏
    ▸ OFX͠ͳ͍͜ͱͰɺ୯ମςετͳͲͷ࣌ʹ
    

    Πϯελϯεͷࠩ͠ସ͕͑Մೳ
    

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28. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ΞϊςʔγϣϯʴίϯϙʔωϯτεΩϟϯͷ৔߹
    ▸ ίϯετϥΫλʹ@AutowiredΛ෇Ճ͠ɺ
    

    Ҿ਺ʹཉ͍͠#FBOΛࢦఆ
    ▸ ίϯςφ͕ద੾ͳ#FBOΛҾ਺ʹ୅ೖͯ͘͠ΕΔ
    28
    @Component
    
    
    public class Hoge {
    
    
    private final Fuga fuga;
    
    
    @Autowired
    
    
    public Hoge(Fuga fuga) {
    
    
    this.fuga = fuga;
    
    
    }
    
    
    }
    ίϯςφ
    Hoge Fuga
    %*
    %*
    ˞Ϋϥε಺ʹίϯετϥΫλ͕ͭͷΈͷ৔߹ɺ
    

    ɹ@Autowired͸লུՄೳ
    

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29. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    !"VUPXJSFEͷলུ
    ▸ Ϋϥε಺ʹίϯετϥΫλ͕ͭͷΈͷ৔߹ɺ
    

    @AutowiredΛলུՄೳ
    29
    @Component
    
    
    public class Hoge {
    
    
    private final Fuga fuga;
    
    
    public Hoge(Fuga fuga) {
    
    
    this.fuga = fuga;
    
    
    }
    
    
    }
    @Autowired
    

    লུՄೳ
    

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30. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    +BWB$PO
    f
    i
    Hͷ৔߹
    ▸ @BeanϝιουͷҾ਺ʹཉ͍͠#FBOΛࢦఆ͠ɺ
    

    ϝιου಺ʹ୅ೖ͢ΔίʔυΛهड़
    ▸ ίϯςφ͕ద੾ͳ#FBOΛҾ਺ʹ୅ೖͯ͘͠ΕΔ
    30
    @Configuration
    
    
    public class AppConfig {
    
    
    @Bean
    
    
    public Hoge hoge(Fuga fuga) {
    
    
    return new Hoge(fuga);
    
    
    }
    
    
    }
    ίϯςφ
    Hoge Fuga
    %*
    %*
    

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31. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ͍ΖΜͳ%*
    ▸ ίϯετϥΫλΠϯδΣΫγϣϯ
    31
    @Component
    
    
    public class Hoge {
    
    
    private final Fuga fuga;
    
    
    @Autowired
    
    
    public Hoge(Fuga fuga) {
    
    
    this.fuga = fuga;
    
    
    }
    
    
    }
    @Component
    
    
    public class Hoge {
    
    
    private Fuga fuga;
    
    
    @Autowired
    
    
    public setFuga(Fuga fuga) {
    
    
    this.fuga = fuga;
    
    
    }
    
    
    }
    @Component
    
    
    public class Hoge {
    
    
    @Autowired
    
    
    Fuga fuga;
    
    
    }
    ▸ TFUUFSΠϯδΣΫγϣϯ
    ▸ ϑΟʔϧυΠϯδΣΫγϣϯ
    །ҰHogeΛมߋෆೳʹ
    Ͱ͖ΔͷͰ
    ίϯετϥΫλ
    ΠϯδΣΫγϣϯਪ঑
    ˞ϝιουΠϯδΣΫγϣϯͱ΋ݺͼ·͢
    ˞มߋෆೳ Πϛϡʔλϒϧ
    ʹϑΟʔϧυͷ஋Λॻ׵ෆՄೳ
    

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32. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    %*ͷ·ͱΊ
    ▸ %*ʹඞཁͳΠϯελϯεͷ୅ೖ
    ▸ %*͸ίϯςφ͕#FBOΛੜ੒͢Δࡍʹߦ͏
    ▸ ίϯετϥΫλʹҾ਺Λ෇͚ͯ@Autowired
    

    PS@BeanϝιουʹҾ਺Ͱ#FBOΛ୅ೖՄೳ
    ▸ ίϯετϥΫλΠϯδΣΫγϣϯ͕ਪ঑
    32
    

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33. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ໨࣍
    ᶃ 4QSJOHͷίϯςφͱ͸
    ᶄ %*ͱ͸
    ᶅ είʔϓͱ͸
    ᶆ ϓϩΩγͱ͸
    ᶇ "01ͱ͸
    33
    

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34. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ίϯςφͷػೳ ࠶ܝ
    
    ᶃ %FQFOEFODZ*OKFDUJPO
    ᶄ είʔϓͷ؅ཧ
    ᶅ ϓϩΩγͷ࡞੒
    34
    

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35. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    είʔϓͱ͸
    ▸ ίϯςφ͕؅ཧ͍ͯ͠Δɺ#FBOͷ༗ޮൣғ
    ▸ #FBO͕͍ͭੜ੒͞Εɺ͍ͭഁغ͞ΕΔ͔
    35
    είʔϓͷछྨ આ໌
    TJOHMFUPO Πϯελϯε͸ͭͷΈʢσϑΥϧτʣ
    QSPUPUZQF ඞཁͳ࣌ʹΠϯελϯε͕ຖճ࡞ΒΕΔ
    SFRVFTU ϦΫΤετͱಉ͡
    TFTTJPO ηογϣϯͱಉ͡
    

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36. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    σϑΥϧτ͸TJOHMFUPO
    ▸ ͭͷΠϯελϯε͕
    

    ֤ॴͰ࢖͍ճ͞ΕΔ
    ▸ ϑΟʔϧυͰ஋Λ
    

    อ࣋͢Δͷ͸ݫېʂʂ
    ▸ ηΩϡϦςΟࣄނʹʜ
    36
    #FBO
    ஋
    " #
    ஋Λ
    

    อଘ
    ஋͕
    

    ݟ͑Δ
    

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37. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    είʔϓͷߟ͑ํ
    ▸ ΄ͱΜͲͷ#FBO͸TJOHMFUPOͰ0,
    ▸ ͦΕҎ֎ʹͨ͘͠ͳͬͨΒɺ·ͣઃܭΛݟ௚͢
    ▸ ͨ·ʹTFTTJPO࢖͏͔ͳɾɾɾʁ͘Β͍ɻ
    37
    

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38. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    είʔϓͷࢦఆํ๏ᶃ
    ▸ @Scope("είʔϓ໊")Λ#FBOʹ෇Ճ
    38
    @Scope("session")
    
    
    @Component
    
    
    public class Hoge { ... }
    @Configuration
    
    
    public class AppConfig {
    
    
    @Scope("request")
    
    
    @Bean
    
    
    public Hoge hoge() { ... }
    
    
    }
    

    View Slide

39. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    είʔϓͷࢦఆํ๏ᶄ
    ▸ @RequestScopeɾ@SessionScope΋༻ҙ͞Ε͍ͯΔ
    39
    @SessionScope
    
    
    @Component
    
    
    public class Hoge { ... }
    @Configuration
    
    
    public class AppConfig {
    
    
    @RequestScope
    
    
    @Bean
    
    
    public Hoge hoge() { ... }
    
    
    }
    

    View Slide

40. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    είʔϓͷ·ͱΊ
    ▸ TJOHMFUPOɾQSPUPUZQFɾSFRVFTUɾTFTTJPOͷ
    

    छྨ
    ▸ σϑΥϧτ͸TJOHMFUPOɻ஋ͷอ࣋ݫېʂ
    ▸ @ScopeͰࢦఆ
    40
    

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41. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ໨࣍
    ᶃ 4QSJOHͷίϯςφͱ͸
    ᶄ %*ͱ͸
    ᶅ είʔϓͱ͸
    ᶆ ϓϩΩγͱ͸
    ᶇ "01ͱ͸
    41
    

    View Slide

42. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ίϯςφͷػೳ ࠶ܝ
    
    ᶃ %FQFOEFODZ*OKFDUJPO
    ᶄ είʔϓͷ؅ཧ
    ᶅ ϓϩΩγͷ࡞੒
    42
    

    View Slide

43. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ϓϩΩγ
    ϓϩΩγͱ͸
    ▸ ຊདྷ#FBOͱͳΔ͸ͣͩͬͨ
    ΠϯελϯεΛ
    

    ϥοϓͨ͠#FBO
    ▸ ͢΂ͯͷ#FBOʹϓϩΩγ͕
    ෇͘Θ͚Ͱ͸ͳ͍ʢޙड़ʣ
    ▸ ᶃΠϯλϑΣʔε·ͨ͸
    

    ᶄܧঝ
    

    Λར༻ͯ͠࡞ΒΕΔ
    43
    <>
    
    
    Hoge
    HogeImpl
    

    View Slide

44. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    44
    

    View Slide

45. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    Ͳ͏͍͏͜ͱʁ
    45
    @Component
    
    
    public class HogeImpl implements Hoge {
    
    
    public void doSomething() { ... }
    
    
    }
    // ͜ͷίʔυ͸ΠϝʔδͰ͢
    
    
    public class HogeProxy implements Hoge {
    
    
    @Override
    
    
    public void doSomething() { ... }
    
    
    }
    ͜Ε͕#FBOʹͳΔͷ
    

    Ͱ͸ͳ͘ɾɾɾ
    ͜ΜͳΫϥε͕
    

    ࣮ߦ࣌ʹੜ੒͞Εɺ
    

    ͜Ε͕#FBOʹͳΔʂ
    

    View Slide

46. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ϓϩΩγͷ໨తᶃ"01
    ▸ ຊདྷͷॲཧͷલޙ
    ʹɺׂΓࠐΈॲཧ
    Λߦ͏
    ▸ τϥϯβΫγϣϯͷ
    ։࢝ɾऴྃɺ
    

    ݖݶνΣοΫͳͲ
    ▸ ৄࡉ͸ޙड़
    46
    ͜ͷίʔυ͸ΠϝʔδͰ͢
    public class HogeProxy
    
    
    implements Hoge {
    
    
    public void doSomething() {
    
    
    ຊདྷͷΠϯελϯε
    
    
    Hoge hoge = ...;
    
    
    લॲཧͷׂΓࠐΈ
    interceptor.doBefore();
    
    
    ຊདྷͷॲཧ
    hoge.doSomething();
    
    
    ޙॲཧͷׂΓࠐΈ
    interceptor.doAfter();
    
    
    }
    
    
    }
    

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47. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    @Scope("singleton")
    
    
    @Component
    
    
    public class SingletonScopeBeanImpl
    
    
    implements SingletonScopeBean {
    
    
    private final RequestScopeBean rsb;
    
    
    @Autowired
    
    
    public SingletonScopeBean(RequestScopeBean rsb) {
    
    
    this.rsb = rsb;
    
    
    }
    
    
    public void doSomething() {
    
    
    rsb.execute();
    
    
    }
    
    
    }
    ϓϩΩγͷ໨తᶄείʔϓͷҧ͍Λٵऩ
    47
    ͪ͜Β΋TJOHMFUPOʹ
    ͳͬͯ͠·͏ʁ
    

    ˠ%*͞ΕΔͷ͸
    ϓϩΩγ
    

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48. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ͜ͷίʔυ͸ΠϝʔδͰ͢
    public class RequestScopeBeanProxy
    
    
    implements RequestScopeBean {
    
    
    ApplicationContext context;
    
    
    @Override
    
    
    public void execute() {
    
    
    RequestScopeBean rsb =
    
    
    context.getBean(RequestScopeBean.class);
    
    
    rsb.execute();
    
    
    }
    
    
    }
    ϓϩΩγͷ໨తᶄείʔϓͷҧ͍Λٵऩ
    48
    ˞͜ͷϓϩΩγ͸ΠϯλϑΣʔεͰ࡞੒͍ͯ͠·͕͢ɺ
    

    ɹܧঝͷ৔߹Ͱ΋ಉ༷Ͱ͢
    ຖճίϯςφ͔Β
    औಘ͍ͯ͠Δʂ
    

    View Slide

49. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ϓϩΩγͷ໨తᶅ#FBOΛγϯάϧτϯʹอͭ
    49
    @Configuration
    
    
    public class HogeConfig {
    
    
    @Bean
    
    
    public Sample1 sample1() {
    
    
    return new Sample1();
    
    
    }
    
    
    @Bean
    
    
    public Sample2 sample2() {
    
    
    return new Sample2(sample1());
    
    
    }
    
    
    @Bean
    
    
    public Sample3 sample3() {
    
    
    return new Sample3(sample1());
    
    
    }
    
    
    }
    4BNQMFͷΠϯελϯε͕
    ͭ࡞ΒΕΔʂʁ
    4BNQMFͷΠϯελϯε͕
    

    ͭ࡞ΒΕΔʂʁ
    

    γϯάϧτϯͰͳ͘ͳΔʂʁ
    

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50. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ϓϩΩγͷ໨తᶅ#FBOΛγϯάϧτϯʹอͭ
    50
    // ͜ͷίʔυ͸ΠϝʔδͰ͢
    
    
    public class HogeConfigProxy extends HogeConfig {
    
    
    @Override
    
    
    public Sample1 sample1() {
    
    
    if (طʹDIίϯςφʹSample1ͷBean͕͋ͬͨΒ) {
    
    
    return context.getBean(Sample1.class)
    
    
    } else {
    
    
    return new Sample1();
    
    
    }
    
    
    }
    
    
    ...
    
    
    }
    TBNQMF
    ͕Կճ࣮ߦ͞Εͯ΋
    

    #FBO͸γϯάϧτϯʂ
    

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51. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ᶃ "01Λར༻͍ͯ͠Δ#FBO
    ᶄ @ScopeͰproxyMode=TARGET_CLASS
    

    ·ͨ͸INTERFACES͕ࢦఆ͞Ε͍ͯΔ#FBO
    ᶅ @ComponentScanʹscopedProxy=TARGET_CLASS
    

    ·ͨ͸INTERFACES͕ࢦఆ͞Ε͍ͯΔ#FBO
    ᶆ @ConfigurationʹproxyBeanMethods=true
    

    ͕ࢦఆ͞Ε͍ͯΔ+BWB$PO
    f
    i
    HʢσϑΥϧτͰtrueʣ
    ͲΜͳ#FBOʹϓϩΩγ͕࡞ΒΕΔ͔
    51
    5"3(&5@$-"44ˠ$(-*#
    

    */5&3'"$&4ˠ+%,
    

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52. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ϓϩΩγͷ࡞ΒΕํᶃ+%,1SPYZ
    ▸ σϑΥϧτͷڍಈ
    ▸ ຊདྷͷΫϥε͕࣮૷͍ͯ͠Δશͯͷ
    

    ΠϯλϑΣʔεΛ࣮૷ͨ͠Ϋϥε͕
    

    ࣮ߦ࣌ʹ࡞ΒΕɺ
    

    ͦΕ͕ϓϩΩγʢ͔ͭ#FBOʣͱͳΔ
    ▸ java.lang.reflect.Proxyͷػೳ
    ▸ ԿΒ͔ͷΠϯλϑΣʔεΛ࣮૷ͨ͠
    

    Ϋϥεʹ࢖ΘΕΔ
    52
    ϓϩΩγ
    <>
    
    
    Hoge
    HogeImpl
    ࣮૷
    

    View Slide

53. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ϓϩΩγͷ࡞ΒΕํᶄ$(-*#1PYZ
    ▸ ຊདྷͷΫϥεͷαϒΫϥε͕
    

    ࣮ߦ࣌ʹ࡞ΒΕɺ
    

    ͦΕ͕ϓϩΩγʢ͔ͭ#FBOʣͱ
    ͳΔ
    ▸ 4QSJOH͕಺แ͍ͯ͠Δ
    

    ϥΠϒϥϦʮ$(-*#ʯͷػೳ
    ▸ ԿͷΠϯλϑΣʔε΋
    

    ࣮૷ͯ͠ͳ͍Ϋϥεʹ࢖ΘΕΔ
    53
    ϓϩΩγ
    HogeImpl
    HogeImpl
    ܧঝ
    

    View Slide

54. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    #FBO͕ΠϯλϑΣʔεΛ࣮૷͍ͯͯ͠΋
    

    $(-*#1SPYZΛ࢖͍͍ͨ৔߹
    ᶃ 4QSJOH#PPUͰ͸σϑΥϧτ͕$(-*#1SPYZ
    ▸ spring.aop.proxy-target-class=trueͰ͋ΔͨΊ
    

    ʢfalseʹ͢Ε͹+%,1SPYZʣ
    ᶄ @Scope(proxyMode=TARGET_CLASS)
    ▸ ෇Ճͨ͠#FBOͷΈ͕ର৅
    ᶅ @ComponentScan(scopedProxy=TARGET_CLASS)
    ▸ ίϯϙʔωϯτεΩϟϯͨ͠શBean͕ର৅
    54
    

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55. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ϓϩΩγͷ੍໿
    ▸ +%,1SPYZ
    ▸ গͳ͘ͱ΋ͭͷΠϯλϑΣʔεΛ࣮૷͠ͳ͚Ε͹
    

    ͳΒͳ͍
    ▸ $(-*#1SPYZ
    ▸ Ϋϥε΍ϝιουΛ
    f
    i
    OBMʹͯ͠͸ͳΒͳ͍
    55
    

    View Slide

56. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ϓϩΩγͷ·ͱΊ
    ▸ ϓϩΩγʹຊདྷ#FBOͱͳΔ͸ͣͩͬͨΠϯελϯεΛ
    

    ɹɹɹɹɹϥοϓͨ͠#FBO
    ▸ ΠϯλϑΣʔεʢ+%,1SPYZʣ·ͨ͸
    

    ܧঝʢ$(-*#1SPYZʣΛར༻ͯ͠࡞ΒΕΔ
    ▸ 4QSJOH#PPUͰ͸σϑΥϧτ͕$(-*#1SPYZ
    ▸ "01ɺείʔϓͷҧ͍ͷٵऩɺ#FBOΛγϯάϧτϯʹอͭɺ
    

    ͕໨త
    ▸ ֤ϓϩΩγͷ੍໿ʹ஫ҙ
    56
    

    View Slide

57. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ໨࣍
    ᶃ 4QSJOHͷίϯςφͱ͸
    ᶄ %*ͱ͸
    ᶅ είʔϓͱ͸
    ᶆ ϓϩΩγͱ͸
    ᶇ "01ͱ͸
    57
    

    View Slide

58. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    "01ͱ͸
    58
    ▸ ຊདྷͷॲཧͷલޙʹɺׂΓࠐΈॲཧΛߦ͏
    ▸ τϥϯβΫγϣϯͷ։࢝ɾऴྃɺݖݶνΣοΫͳͲ
    

    View Slide

59. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    "01ͷ࢖͍ํ
    59
    @Configuration
    
    
    @EnableAspectJAutoProxy
    
    
    public class AspectConfig {
    
    
    ...
    
    
    }
    4QSJOH#PPUͰ͸ෆཁ
    

    View Slide

60. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    "01ͷ࢖͍ํ
    60
    @Aspect
    
    
    @Component
    
    
    public class LoggingAspect {
    
    
    @Around("execution(* com.example.*.*(..))")
    
    
    public Object log(ProceedingJoinPoint jp)
    
    
    throws Exception {
    
    
    System.out.println("start"); // લॲཧ
    
    
    Object value = jp.proceed(); // ຊདྷͷॲཧ
    
    
    System.out.println("end"); // ޙॲཧ
    
    
    return value;
    
    
    }
    
    
    }
    DPNFYBNQMFύοέʔδͷ
    

    શΫϥεɾશϝιουͷલޙʹׂΓࠐΉ
    

    View Slide

61. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    "01ͷ࢖͍ํ
    61
    package com.example;
    
    
    @Component
    
    
    public class HelloService {
    
    
    public void hello() {
    
    
    System.out.println("hello");
    
    
    }
    
    
    }
    ׂΓࠐΈର৅͸
    

    ඞͣ#FBO
    start
    
    
    hello
    
    
    end
    ࣮ߦ݁Ռ
    

    View Slide

62. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ׂΓࠐΊΔ৔ॴ
    ▸ ϝιου։࢝௚લ
    

    ˠ@Before
    ▸ ϝιουऴྃ௚ޙ
    

    ˠ@AfterReturningɾ@AfterThrowing
    

    ɾ@After
    ▸ ϝιου։࢝௚લɾऴྃ௚ޙͷ྆ํ
    

    ˠ@Around
    62
    

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63. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ϙΠϯτΧοτࣜ
    ▸ ͲͷΫϥεɾͲͷϝιουʹׂΓࠐΉ͔ͷ
    

    ৚݅Λࢦఆ͢Δ
    63
    execution(* com.example.*.*(..))
    execution(@annotation(com.example.MyAnno))
    ໭Γ஋ͷ
    

    ܕ͸೚ҙ
    DPNFYBNQMFύοέʔδͷ
    

    શΫϥεɾશϝιου
    Ҿ਺ͷݸ਺͸
    

    ೚ҙ
    @com.example.MyAnnoΞϊςʔγϣϯ͕
    

    ෇Ճ͞Εͨશϝιου
    ϙΠϯτΧοτͷਖ਼ࣜͳจ๏͸ɺAspectJͷϦϑΝϨϯεΛࢀর
    

    https://www.eclipse.org/aspectj/doc/next/progguide/language-joinPoints.html
    

    View Slide

64. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ϓϩΩγʹΑΔ"01ͷ࣮ݱ
    64
    ϓϩΩγ
    HelloService
    HelloService
    
    
    Impl
    Interceptor
    ▸ ϓϩΩγ಺ʹɺׂΓࠐΈॲཧΛ࣮ߦ͢Δ
    *OUFSDFQUPS͕ಉډ͢Δ
    

    View Slide

65. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ϓϩΩγʹΑΔ"01ͷ࣮ݱ
    65
    ͜ͷίʔυ͸ΠϝʔδͰ͢
    public class HelloServiceProxy
    
    
    implements HelloService {
    
    
    @Override
    
    
    public void hello() {
    
    
    HelloService target = ...; // ׂΓࠐΈର৅
    
    
    Interceptor interceptor = ...; // ׂΓࠐΈॲཧ୲౰
    
    
    interceptor.doBefore(); // લॲཧ
    
    
    target.hello(); // ຊདྷͷॲཧ
    interceptor.doAfter(); // ޙॲཧ
    
    
    }
    
    
    }
    

    View Slide

66. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    "01ͷ஫ҙ఺
    ▸ ಉҰΫϥε಺ͷϝιουݺͼग़͠ʹ͸ׂΓࠐΈ͕͞Εͳ͍ʂ
    ▸ ಛʹ!5SBOTBDUJPOBMͰؒҧ͍ଟ͠
    66
    @Component
    
    
    public class SampleService {
    
    
    public void method1() {
    
    
    System.out.println("method1()");
    
    
    method2();
    
    
    }
    
    
    public void method2() {
    
    
    System.out.println("method2()");
    
    
    }
    
    
    }
    ͜ͷmethod2()ʹ͸
    

    ׂΓࠐΈ͞Εͳ͍ʂ
    

    View Slide

67. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ͳׂͥΓࠐΈ͞Εͳ͍ͷ͔
    67
    ಉҰΫϥε಺͔ͩΒ
    

    *OUFSDFQUPS͕࣮ߦ͞Εͳ͍ʂ
    

    View Slide

68. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ׂΓࠐΈ͞ΕΔΑ͏ʹ͢Δʹ͸
    68
    @Configuration
    
    
    @EnableAspectJAutoProxy(exposeProxy = true)
    
    
    public class AspectConfig { ... }
    @Component
    
    
    public class SampleService {
    
    
    public void method1() {
    
    
    ...
    
    
    ((SampleService) AopContext.currentProxy())
    
    
    .method2();
    
    
    }
    
    
    public void method2() { ... }
    
    
    }
    4QSJOH#PPUͰ΋෇͚Δ
    

    View Slide

69. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    "01ͷ·ͱΊ
    ▸ @AroundͳͲͷΞϊςʔγϣϯͱɺ
    

    ϙΠϯτΧοτࣜͰׂΓࠐΈର৅Λࢦఆ͢Δ
    ▸ "01͸ϓϩΩγʹΑ࣮ͬͯݱ͞Ε͍ͯΔ
    ▸ ಉҰΫϥε಺ͷϝιουݺͼग़͠ʹ͸
    

    ׂΓࠐΈ͞Εͳ͍ͷͰ஫ҙ
    69
    

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70. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ·ͱΊ
    70
    

    View Slide

71. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ຊ೔ͷ·ͱΊ
    ▸ 4QSJOH͸ίϯςφͰ#FBOΛ؅ཧ͍ͯ͠Δ
    ▸ %*ͱ͸ɺඞཁͳ#FBOͷࣗಈత୅ೖ
    ▸ είʔϓ͸̐छྨɻσϑΥϧτ͸TJOHMFUPO
    ▸ #FBOʹ͸ϓϩΩγ͕࡞ΒΕ͍ͯΔ৔߹͕͋Δ
    ▸ "01͸ϓϩΩγʹΑ࣮ͬͯݱ͞Ε͍ͯΔ
    71
    

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72. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ͓͢͢Ίࢢൢॻ੶
    ▸ ্هҎ֎͸ɺ಺༰ͷ৴པੑ͕ඍົͳͷͰɺ
    

    ݸਓతʹ͸͓͢͢Ί͠·ͤΜ
    72
    

    View Slide

73. (C) CASAREAL, Inc. All rights reserved.
    KTVH
    ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ
    73
    

    View Slide