プロになるためのSpring上級知識 #jsug / advanced-spring-for-professionals

ϓϩʹͳΔͨΊͷ 4QSJOH্ڃ஌ࣝ ג ΫϨσΟηκϯଟాਅහ ೥݄೔ 4QSJOH'FTU 1

͜ͷηογϣϯʹ͍ͭͯ ▸ 4QSJOH্ڃऀʹඞਢͱͳΔɺ%*ίϯςφؔ࿈ͷ   ൃలతͳ஌ࣝʹ͍ͭͯղઆ͠·͢ ▸ ͜ͷηογϣϯ͸ʲதڃऀ޲͚ʳͰ͢ ▸ 4QSJOHͷ%*ίϯςφͳͲʹ͍ͭͯ͸ɺ  
͋Δఔ౓஌͍ͬͯΔ͜ͱΛલఏʹղઆ͠·͢ ▸ 4QSJOH#PPUΛར༻͍ͯ͠ͳ͍͜ͱΛલఏͱ͠·͢ ▸ ར༻࣌ͷҧ͍͸ඞཁʹԠͯ͡ղઆ͠·͢ 2

͜ͷηογϣϯͷલఏ஌ࣝ ▸ 4QSJOH'FTUͷ͜ͷηογϣϯ 3 IUUQTZPVUVCF-(UEQTN.GW*

ࣗݾ঺հ 4 ▸ ଟాਅහ !TVLF@NBTB ▸ ΫϨδοτΧʔυؔ࿈ͷ   γεςϜΛ࡞ͬͯΔ
  +BWBΤϯδχΞ ▸ ݩɾݚमτϨʔφʔ ▸ +46(ελοϑ

໨࣍ ᶃ %*ίϯςφͷཁ఺෮श ᶄ ಉ͡ܕͷ#FBO͕ෳ਺͋ΔͱͲ͏ͳΔʁ ᶅ +BWB$PO fi HΫϥεΛ෼ׂɾ౷߹͢Δʹ͸ʁ ᶆ
؀ڥʹΑͬͯ#FBO΍ઃఆ஋Λมߋ͢Δʹ͸ʁ ᶇ #FBO͸Ͳ͏΍ͬͯ࡞ΒΕΔʁ 5

4QSJOH͸ίϯςφΛ͍࣋ͬͯΔ ▸ ίϯςφʹΠϯελϯεͷೖΕ෺ ▸ #FBOʹίϯςφͰ؅ཧ͞ΕͨΠϯελϯε 7 ίϯςφ #FBO #FBO #FBO
#FBO #FBO ˞ʮΠϯελϯεʯͱ͸ɺ   ɹ΋ͪΖΜ+BWBͷΠϯελϯεͷ   ɹ͜ͱͰ͢ ඞཁʹԠͯ͡   औΓग़ͯ͠࢖͏

#FBOΛఆٛ͢Δํ๏ ᶃ ίϯϙʔωϯτεΩϟϯ ᶄ +BWB$PO fi H ᶅ ؔ਺ܕ#FBOఆٛ ࠓճ͸ׂѪ
ᶆ 9.- ࠓճ͸ׂѪ 8

#FBOఆٛํ๏ᶃίϯϙʔωϯτεΩϟϯ ▸ ίϯϙʔωϯτεΩϟϯ   ʹࢦఆ͞Εͨύοέʔδ͔Β@Component͕   ɹ෇͍ͨΫϥεΛ୳͢ ▸ ݟ͚ͭͨΒΠϯελϯεԽˠίϯςφʹอଘ 9

#FBOఆٛํ๏ᶃίϯϙʔωϯτεΩϟϯ ▸ ӈهͷΞϊςʔγϣϯΛ   Ϋϥεʹ෇͚Δͱɺ   @ComponentΛ෇͚ͨ   ͜ͱͱಉ͡ʹͳΔ ▸
Ϋϥεͷ໾ׂʹԠͯ͡   ม͑Δ 10 @Repository @Service @Controller @RestController @Configuration @ControllerAdvice @RestControllerAdvice ɾɾɾ ˞͜ΕΒͷΞϊςʔγϣϯͷιʔείʔυΛಡΉͱɺ   ɹ@Component͕෇͍͍ͯΔ͜ͱ͕෼͔Γ·͢ +BWB$PO fi H΋ #FBOʂ

#FBOఆٛํ๏ᶃίϯϙʔωϯτεΩϟϯ ▸ #FBOͱ͍ͨ͠Ϋϥε 11 package com.example; @Component public class Hoge
{ ... } @Configuration @ComponentScan(basePackages = "com.example") public class AppConfig {} ▸ ઃఆΫϥε +BWB$PO fi H @Component͕   ෇͍ͨΫϥεΛ   ୳͢ύοέʔδ

#FBOఆٛํ๏ᶄ+BWB$PO fi H ▸ +BWB$PO fi HΫϥεʹϝιουΛ࡞੒͠ɺ   @BeanΛ෇Ճ͢Δ  
ˠϝιουͷ໭Γ஋͕#FBOʹͳΔ 12 !$PNQPOFOU4DBO͸ෆཁ @Configuration public class AppConfig { @Bean public Hoge hoge() { return new Hoge(); } } !$PNQPOFOU͸ෆཁ public class Hoge { ... }

#FBO*%ͱ͸ ▸ ֤#FBOΛࣝผ͢ΔͨΊͷ*% ▸ @ComponentͰ#FBOఆٛͨ͠৔߹ɺ   ʮΫϥε໊ͷ಄จࣈΛখจࣈʹͨ͠΋ͷʯ   ͕#FBO*% ▸
@BeanͰ#FBOఆٛͨ͠৔߹ɺ   ϝιου໊͕#FBO*% 13

#FBO*%ͱ͸ 14 @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*%

ίϯςφΛ࡞Δɾ#FBOΛऔಘ͢Δ ▸ +BWB$PO fi HΫϥεΛࢦఆͯ͠   ApplicationContext ίϯςφ Λ࡞੒ ▸
ίϯϙʔωϯτεΩϟϯɾ+BWB$PO fi HͲͪΒͰ΋ڞ௨ ▸ getBean()Ͱ#FBOΛऔಘͰ͖Δ 15 ίϯςφͷ࡞੒ ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class); #FBOΛ%*ίϯςφ͔ΒऔಘʢҾ਺͸ཉ͍͠#FBOͷσʔλܕʣ Hoge hoge = context.getBean(Hoge.class);

4QSJOH#PPUͷ৔߹ 16 ApplicationContext context = SpringApplication.run(AppConfig.class, args); Α͘main()ϝιουʹ   ॻ͔Ε͍ͯΔॲཧͰ͢Ͷʂ

%* ▸ ίϯετϥΫλʹ@AutowiredΛ෇Ճ͠ɺ   Ҿ਺ʹཉ͍͠#FBOΛࢦఆ ▸ ίϯςφ͕ద੾ͳ#FBOΛҾ਺ʹ୅ೖͯ͘͠ΕΔ ▸ Ϋϥε಺ʹίϯετϥΫλ͕ͭͷ৔߹ɺ@Autowired͸লུՄ 17
@Component public class Hoge { private final Fuga fuga; @Autowired public Hoge(Fuga fuga) { this.fuga = fuga; } } ίϯςφ Hoge Fuga %* %*

͍ΖΜͳ%* ▸ ίϯετϥΫλΠϯδΣΫγϣϯ 18 @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; } །ҰHogeΛมߋෆೳʹ Ͱ͖ΔͷͰ ίϯετϥΫλ ΠϯδΣΫγϣϯਪ঑ ˞มߋෆೳ Πϛϡʔλϒϧ ʹϑΟʔϧυͷ஋Λॻ׵ෆՄೳ ▸ ϑΟʔϧυΠϯδΣΫγϣϯ ▸ ϝιουΠϯδΣΫγϣϯ

͜ͷষͷ·ͱΊ ▸ ίϯςφʹΠϯελϯε #FBO ͷೖΕ෺ ▸ ίϯϙʔωϯτεΩϟϯ ▸ @ComponentͰ#FBOʹ͢ΔΫϥεΛࢦఆ ▸
@ComponentScanͰ୳͢ൣғΛࢦఆ ▸ +BWB$PO fi H ▸ @BeanΛ෇Ճͨ͠ϝιουͷ໭Γ஋͕#FBOʹͳΔ ▸ %* ▸ ίϯετϥΫλͳͲʹ@AutowiredΛ෇Ճ 19

Ͳ͏ͳΔʁ 21 @Component public class FooImpl1 implements Foo { ...
} @Component public class FooImpl2 implements Foo { ... } @Component public class Bar { public Bar(Foo foo) { ... } } ܕ'PPʹ߹க͢Δ#FBO͕ͭ ˠྫ֎ൃੜʂʂ

ղܾํ๏ ᶃ @QualifierΛར༻ ᶄ @PrimaryΛར༻ ᶅ %*͢ΔܕΛม͑Δ 22

ᶃ!2VBMJ fi FSΛར༻ 23 @Component // Bean ID͸"fooImpl1" public class
FooImpl1 implements Foo { ... } @Component // Bean ID͸"fooImpl2" public class FooImpl2 implements Foo { ... } @Component public class Bar { private final Foo foo; public Bar(@Qualifier("fooImpl1") Foo foo) { ... } } %*͍ͨ͠#FBOͷ#FBO*%Λࢦఆ

!2VBMJ fi FSͷ΋͏ͭͷ࢖͍ํ 24 @Retention(RUNTIME) @Target({METHOD, TYPE, PARAMETER, FIELD}) @Qualifier
public @interface Foo1 { ... } @Retention(RUNTIME) @Target({METHOD, TYPE, PARAMETER, FIELD}) @Qualifier public @interface Foo2 { ... } ▸ @QualifierΛ෇Ճͨ͠ಠࣗΞϊςʔγϣϯΛ   ͭ࡞੒

!2VBMJ fi FSͷ΋͏ͭͷ࢖͍ํ 25 @Component @Foo1 public class FooImpl1 implements
Foo { ... } @Component @Foo2 public class FooImpl2 implements Foo { ... } @Component public class Bar { public Bar(@Foo1 Foo foo) { ... } } ▸ ಠࣗΞϊςʔγϣϯΛ#FBOఆٛՕॴɾ%*Օॴͷ ྆ํʹ෇Ճ FooImpl1͕%*͞ΕΔ

!2VBMJ fi FSͷ࢖͍ॴ ▸ কདྷతʹ%*͢Δ#FBOͷܕ͕มΘΔՄೳੑ͕͋Δ ৔߹΍ɺܕͰͷ۠ผ͕೉͍͠৔߹ʹ࢖͏ ▸ #FBO*%ΛจࣈྻͰϋʔυίʔυ͢ΔΑΓ΋ɺ   ಠࣗΞϊςʔγϣϯΛ࢖͏
26

ᶄ!1SJNBSZΛར༻ 27 @Component @Primary public class FooImpl1 implements Foo {
... } @Component public class FooImpl2 implements Foo { ... } @Component public class Bar { public Bar(Foo foo) { ... } } FooImpl1͕%*͞ΕΔ ʢFooImpl2Λ%*͍ͨ͠৔߹͸   @QualifierΛར༻ʣ

!1SJNBSZͷ࢖͍ॴ ▸ ϓϩμΫγϣϯίʔυͰ͸ͳΔ΂͘࢖Θͳ͍ ▸ @QualifierͳͲͰ໌ࣔతʹࢦఆͨ͠΄͏͕ؒҧ͍͕গͳ͍ ▸ ޙͰͭ໨ͷ#FBOΛ௥Ճ͢Δ͜ͱʹͳͬͨࡍɺͭ໨ͷ#FBO ͕େྔʹ͋ͬͯमਖ਼ՕॴΛগͳ͍ͨ͘͠৔߹͸க͠ํͳ͔͠΋ ▸ ςετίʔυͰελϒΛ%*͢ΔͨΊʹ࢖͏
28 @Configuration public class TestConfig { @Bean @Primary public Foo foo { return new StubFoo(); } } #BSͷςετ࣌ʹ ίϨ͕%*͞ΕΔ

ᶅ%*͢ΔܕΛม͑Δ 29 @Component public class FooImpl1 implements Foo { ...
} @Component public class FooImpl2 implements Foo { ... } @Component public class Bar { public Bar(FooImpl1 foo) { ... } } %*͍ͨ͠#FBOͷܕΛ໌ࣔ

ܕͷ࢖͍ॴ ▸ ՄೳͳݶΓ͜ͷํ๏Λ࢖͏ ▸ Ξϊςʔγϣϯͩͱ෇͚๨ΕͷϦεΫ͕ߴ͍ 30

͜ͷষͷ·ͱΊ ▸ ಉ͡ܕͷ#FBO͕͋ͬͨΒ ▸ @QualifierΛར༻ ▸ @PrimaryΛར༻ ▸ %*͢ΔܕΛม͑Δ ▸
ՄೳͳݶΓܕͰ൑ผɻ࣍఺Ͱ@Qualifierɻ   @Primary͸ςετͷΈɻ 31

+BWB$PO fi Hͷ෼ׂ 33 ▸ ͭͷ+BWB$PO fi Hʹ͢΂ͯͷ#FBOఆٛΛॻ͘ͱ   Ϋϥε͕ංେԽ͢Δ
  ˠ+BWB$PO fi HΛ෼ׂ͢Δ ▸ ྫ͑͹ԼهͷΑ͏ʹ෼ׂ͢Δ ᶃ 4QSJOH.7$༻$PO fi H ᶄ ϏδωεϩδοΫʴτϥϯβΫγϣϯ༻$PO fi H ᶅ σʔλιʔεʴ03Ϛούʔ༻$PO fi H

෼ׂͨ͠+BWB$PO fi HΛ͢΂ͯ࢖͏ํ๏ ᶃ @ImportͰ·ͱΊΔ ᶄ ίϯϙʔωϯτεΩϟϯ഑Լʹஔ͘ ᶅ ApplicationContextͷίϯετϥΫλʹ  
͢΂ͯࢦఆ͢Δ 34

ᶃ!*NQPSUͰ·ͱΊΔ 35 @Import(Config2.class) @Configuration public class Config1 { ... }
@Configuration public class Config2 { ... } ApplicationContext context = new AnnotationConfigApplicationContext(Config1.class); $PO fi Hʹ$PO fi HΛ߹ମ $PO fi HͷΈΛࢦఆ

<ൃల>!&OBCMF9YY͸!*NQPSU ▸ @EnableWebMvcͳͲͷΞϊςʔγϣϯ͸ɺ   ࣮͸@ImportͰطଘͷ+BWB$PO fi HΛ   ߹ମ͍ͤͯ͞Δ 36

ᶄίϯϙʔωϯτεΩϟϯ഑Լʹஔ͘ 37 @Configuration @ComponentScan(basePackages = "com.example") public class Config1 {
... } package com.example.foo; @Configuration public class Config2 { ... } εΩϟϯ഑Լʹஔ͚͹ ͦͷ+BWB$PO fi H͸࢖ΘΕΔ ApplicationContext context = new AnnotationConfigApplicationContext(Config1.class); $PO fi HͷΈΛࢦఆ

ᶅ"QQMJDBUJPO$POUFYUͷίϯετϥΫλʹ   ɹ͢΂ͯࢦఆ͢Δ 38 ApplicationContext context = new AnnotationConfigApplicationContext( Config1.class,
Config2.class); @Configuration public class Config1 { ... } @Configuration public class Config2 { ... } Մม௕Ҿ਺Ͱશ+BWB$PO fi HΛࢦఆ

࢖͍ॴ ▸ ݸਓతʹ͸΄ͱΜͲ   ʮᶄίϯϙʔωϯτεΩϟϯʯͰࡁ·ͤΔ ▸ ಛʹ4QSJOH#PPUͷ৔߹ ▸ ಛఆͷ+BWB$PO fi
H͚ͩΛ࢖͍͍ͨ৔߹͸ɺ   ίϯϙʔωϯτεΩϟϯ֎ʹ࡞ͬͯ   ʮᶃ@ImportʯΛ࢖͏ 39

͜ͷষͷ·ͱΊ ▸ +BWB$PO fi H͸ద੾ʹ෼ׂ͢Δ ▸ ෼ׂͨ͠+BWB$PO fi HΛ·ͱΊΔํ๏͸ ᶃ
@Import ᶄ ίϯϙʔωϯτεΩϟϯ ᶅ ApplicationContextͷҾ਺ ▸ ΄΅ᶄίϯϙʔωϯτεΩϟϯͰࡁ·ͤͯ0, 40

؀ڥʹΑͬͯ#FBOΛ੾Γସ͍͑ͨʂ ▸ ྫɿDataSourceΛςετ؀ڥͱຊ൪؀ڥͰ੾ସ 42 @Configuration public class AppConfig { @Bean
public DataSource testDataSource() { return ૊ΈࠐΈσʔλϕʔε; } @Bean public DataSource productionDataSource() { return APαʔόʔ͔Βऔಘͨ͠σʔλιʔε; } } ͜ͷ··ͩͱDataSourceͷ %*࣌ʹ࣮ߦ࣌ྫ֎ ͜ͷ··ͩͱDataSourceͷ %*࣌ʹ࣮ߦ࣌ྫ֎

ϓϩϑΝΠϧΛ࢖͏ ▸ ϓϩϑΝΠϧʹ#FBOͷάϧʔϓ ▸ @ProfileͰ೚ҙͷϓϩϑΝΠϧ໊Λࢦఆ ▸ ؀ڥม਺SPRING_PROFILES_ACTIVEͰ   ࣮ߦ࣌ͷϓϩϑΝΠϧΛࢦఆ  
ˠࢦఆͨ͠ϓϩϑΝΠϧͷ#FBO͕༗ޮԽ͞ΕΔ 43

ϓϩϑΝΠϧΛ࢖͏ 44 @Configuration public class AppConfig { @Bean @Profile("test") public
DataSource testDataSource() { ... } @Bean @Profile("production") public DataSource productionDataSource() { ... } } $ export SPRING_PROFILES_ACTIVE=test $ mvn compile exec:java -DmainClass=com.example.Main testDataSourceͷΈ ༗ޮԽ͞ΕΔ

ϓϩϑΝΠϧΛ࢖͏ 45 @Configuration @Profile("test") public class TestConfig { @Bean public
DataSource testDataSource() { ... } } @Configuration @Profile("production") public class ProductionConfig { @Bean public DataSource productionDataSource() { ... } } ▸ +BWB$PO fi Hʹ΋@ProfileΛ෇ՃͰ͖Δ ࣮ߦ࣌ʹUFTUϓϩϑΝΠϧ ࢦఆͰ༗ޮԽ͞ΕΔ ࣮ߦ࣌ʹQSPEVDUJPOϓϩϑΝΠϧ ࢦఆͰ༗ޮԽ͞ΕΔ

ओͳ࣮ߦ࣌ϓϩϑΝΠϧࢦఆํ๏ ᶃ +6OJUςετ ▸ @ActiveProfiles("test") ᶄ +7.γεςϜϓϩύςΟ ▸ java -Dspring.profiles.active=test
... ᶅ ؀ڥม਺ ▸ export SPRING_PROFILES_ACTIVE=test 46 ௿ ߴ ༏ઌॱҐ ※શͯͷํ๏Ͱෳ਺ͷϓϩϑΝΠϧ໊ΛࢦఆՄೳʢΧϯϚ۠੾Γʣ ଟ༻͢ΔͱNWOUFTUͰͷ   ςετ࣮ߦ͕࣌ؒ௕͘ͳΔͷͰ஫ҙ   %*ίϯςφ͕࠶࡞੒͞ΕΔͨΊ

ϓϩϑΝΠϧͷ஫ҙ఺ ▸ ϓϩϑΝΠϧʹଐ͍ͯ͠ͳ͍#FBO͸   ࣮ߦ࣌ʹͲͷϓϩϑΝΠϧΛࢦఆͯ͠΋   ༗ޮԽ͞ΕΔ 47 @Configuration public
class AppConfig { @Bean public Sample sample() { ... } @Bean @Profile("test") public Sample testSample() { ... } } ͜ͷ#FBO͸ͲΜͳϓϩϑΝΠϧΛ ࢦఆͯ͠΋࢖ΘΕΔ ͜ͷ#FBO͸UFTUϓϩϑΝΠϧ   ࢦఆ࣌ͷΈ࢖ΘΕΔ

ϓϩύςΟϑΝΠϧ͔Βઃఆ஋Λऔಘ 48 @Configuration @PropertySource("classpath:/sample.properties") public class AppConfig { ... }
# src/main/resources/sample.properties sample.message=Hello! @Component public class Sample { public Sample( @Value("${sample.message}") String message) { ... } } \ϓϩύςΟ໊^Ͱऔಘ ͜ͷ৔߹ɺΫϥεύε্ͷઈରύε fi MF΍IUUQ΋ར༻Մೳ

!7BMVFͰ஋ΛऔಘͰ͖Δओͳ৔ॴ ᶃ XFCYNMͷcontext-param ᶄ +7.γεςϜϓϩύςΟ ▸ java -Dxxx=yyy ᶅ ؀ڥม਺
ᶆ ϓϩύςΟϑΝΠϧ 49 ௿ ߴ ༏ઌॱҐ

ϓϩϑΝΠϧͰϓϩύςΟϑΝΠϧΛ੾Γସ͑Δ 50 @Configuration @PropertySource( "classpath:/sample-${SPRING_PROFILES_ACTIVE}.properties" ) public class AppConfig {
... } # src/main/resources/sample-test.properties sample.message=Hello Test! # src/main/resources/sample-production.properties sample.message=Hello Production! $ export SPRING_PROFILES_ACTIVE=test $ mvn compile exec:java -DmainClass=com.example.Main Hello Test! ϑΝΠϧ໊ʹϓϨʔεϗϧμʔΛؚΊΔ 4QSJOH#PPUͰ͸ඞཁͷແ͍ςΫχοΫ ޙड़

4QSJOH#PPUͷ৔߹ ▸ ઃఆ஋͸͢΂ͯBQQMJDBUJPOQSPQFSUJFTʹॻ͘ ▸ ಛఆͷϓϩϑΝΠϧͰͷΈར༻͢Δઃఆ஋͸   BQQMJDBUJPOϓϩϑΝΠϧ໊QSPQFSUJFTʹॻ͘ ▸ ྫɿBQQMJDBUJPOUFTUQSPQFSUJFT  
ɹɹBQQMJDBUJPOQSPEVDUJPOQSPQFSUJFT ▸ BQQMJDBUJPOQSPQFSUJFTͷ஋͸ɺ   ϓϩϑΝΠϧࢦఆͷ༗ແʹؔΘΒͣඞͣ࢖ΘΕΔ ▸ BQQMJDBUJPOQSPQFSUJFTͱ   BQQMJDBUJPOϓϩϑΝΠϧ໊QSPQFSUJFTʹಉ໊ͷઃఆ͕͋ͬͨΒɺ   ޙऀͷ΋ͷ͕࢖ΘΕΔ 51 @PropertySource   ෆཁ

4QSJOH#PPUͷ৔߹ ▸ 3FMBYFE#JOEJOH ▸ BQQMJDBUJPOQSPQFSUJFTͷfoo.barΛ   ؀ڥม਺ͷFOO_BARͰ্ॻ͖Մೳ 52

4QSJOH#PPUͷ৔߹ ▸ ϓϩύςΟ ͷ༏ઌॱҐ ͕ܾ·ͬͯ ͍Δ 53 https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#features.external-con fi g
ΑΓҾ༻ ௿ ߴ ༏ઌॱҐ

͜ͷষͷ·ͱΊ ▸ @ProfileͰ#FBOΛάϧʔϓԽͰ͖Δ ▸ ࣮ߦ࣌ϓϩϑΝΠϧ໊ͷࢦఆํ๏͸͍Ζ͍Ζ ▸ @ActiveProfilesɺ-Dspring.profiles.activeɺ   ؀ڥม਺SPRING_PROFILES_ACTIVE ▸
ϓϩύςΟϑΝΠϧ͸@PropertySourceͰࢦఆ ▸ ϑΝΠϧ໊ʹϓϨʔεϗϧμʔΛࢦఆ͢Δ͜ͱͰ؀ڥͰͷ੾ସՄೳ ▸ 4QSJOH#PPUͰ͸BQQMJDBUJPOQSPQFSUJFTʹઃఆΛॻ͘ ▸ 3FMBYFE#JOEJOH΍ઃఆͷ༏ઌॱҐ͸͓֮͑ͯ͘ 54

#FBOͷੜ੒ϓϩηε 56 ᶃ#FBOҰཡදΛͭ͘Δ ᶄ#FBOͷίϯετϥΫλΛ࣮ߦ͢Δ ᶅ#FBOʹޙॲཧΛߦ͏

ᶃ#FBOҰཡදΛ࡞Δ 57 Ϋϥε໊ ID είʔϓ ஗Ԇ ґଘઌID com.Foo foo singleton
false (ͳ͠) com.Bar bar prototype true foo ɾɾɾ ɾɾɾ ɾɾɾ ɾɾɾ ɾɾɾ ※͜ͷද͸ΠϝʔδͰ͢ɻਖ਼֬ͳ΋ͷͰ͸͋Γ·ͤΜɻ ▸ 👇ͷΑ͏ͳදΛ࡞Δ ▸ ࣮ମ͸ org.springframework.beans.factory.config.BeanDefinition

ᶃ#FBOҰཡදΛ࡞Δ ▸ Ұཡද࡞੒ͷͨΊʹߦ͏͜ͱ ίϯϙʔωϯτεΩϟϯ +BWB$PO fi HΫϥε಺ͷ@Beanϝιουఆٛͷ֬ೝ ▸
͜ͷ࣌఺Ͱ͸ɺ   ·ͩΠϯελϯε͸ੜ੒͞Εͳ͍ʂ 58

ᶃ#FBOҰཡදΛ࡞Δ ▸ #FBOҰཡද࡞੒ޙɺBeanFactoryPostProcessor͕ දͷҰ෦Λແཧ΍Γॻ͖׵͑Δ ▸ ओͳྫ ▸ PropertySourcesPlaceholderConfigurer ▸ @Valueͷ෦෼ΛϓϩύςΟ͔ΒಡΜͩ΋ͷʹஔ͖׵͑Δ
▸ LazyInitializationBeanFactoryPostProcessor ▸ 4QSJOH#PPUͷػೳʢspring.main.lazy-initialization=trueʣ ▸ શ#FBOͷ<஗Ԇ>ΛUSVFʹ͢Δ 59 ΠϯλϑΣʔε ࣮૷Ϋϥε ࣮૷Ϋϥε

ᶄ#FBOͷίϯετϥΫλΛ࣮ߦ͢Δ ▸ #FBOҰཡදʹج͍ͮͯɺ   ίϯετϥΫλͰΠϯελϯεΛੜ੒͢Δ ▸ ͜ͷࡍɺίϯετϥΫλΠϯδΣΫγϣϯ΋ߦΘΕΔ ▸ Πϯελϯεੜ੒͸ɺґଘؔ܎ʹج͍ͮͯ  
ਖ਼͍͠ॱ൪Ͱ࣮ߦ͞ΕΔ ▸ ྫɿ"͕#ʹґଘ͢Δˠ#ΛઌʹΠϯελϯεੜ੒͢Δ ▸ ϑΟʔϧυΠϯδΣΫγϣϯͱ   ϝιουΠϯδΣΫγϣϯ͸ɺ·ͩߦΘΕͳ͍ʂ 60

ᶅ#FBOʹޙॲཧΛߦ͏ ▸ BeanPostProcessor͕#FBOΠϯελϯεʹޙॲཧΛࢪ͢ ▸ ओͳྫ ▸ AutowiredAnnotationBeanPostProcessor ▸ ϑΟʔϧυΠϯδΣΫγϣϯͱϝιουΠϯδΣΫγϣϯΛߦ͏ ▸
CommonAnnotationBeanPostProcessor ▸ @PostConstruct͕෇Ճ͞ΕͨϝιουΛ࣮ߦ͢Δ ▸ AbstractAutoProxyCreator ▸ "01ͷͨΊͷϓϩΩγΠϯελϯεΛ࡞੒͢Δ 61 ΠϯλϑΣʔε ࣮૷Ϋϥε ࣮૷Ϋϥε ࣮૷Ϋϥε

ิ଍ ▸ BeanFactoryPostProcessorɾ   BeanPostProcessorΛࣗ࡞͢Δ͜ͱ͸ك ▸ ֶश໨తͳΒΞϦ ▸ ੜ੒ϓϩηεΛ஌͍ͬͯΕ͹ɺڽͬͨ͜ͱΛ  
͢ΔࡍͷτϥϒϧΛղܾͰ͖Δ͔΋ ▸ ྫɿ#FBOੜ੒ॲཧʹ͸"01Λ͔͚ΒΕͳ͍   ɹɹʢ·ͩϓϩΩγ͕࡞ΒΕΔલ͔ͩΒʣ 62

͜ͷষͷ·ͱΊ ᶃ #FBOҰཡදΛ࡞Δ ▸ ҰཡදΛ࡞੒ޙɺBeanFactoryPostProcessor͕ҰཡදͷҰ෦Λ ॻ͖׵͑Δ ᶄ #FBOͷίϯετϥΫλΛ࣮ߦ͢Δ ▸ ίϯετϥΫλΠϯδΣΫγϣϯ΋ߦΘΕΔ
ᶅ #FBOʹޙॲཧΛߦ͏ ▸ BeanPostProcessor͕ϑΟʔϧυΠϯδΣΫγϣϯɾϝιουΠϯ δΣΫγϣϯɾ@PostConstructͷ࣮ߦɾϓϩΩγͷ࡞੒ͳͲΛߦ͏ 63

࠷ޙͷ·ͱΊ ▸ ಉ͡ܕͷ#FBO͸@Qualifierɾ@Primaryɾ   αϒΫϥεܕͳͲͰ൑ผͰ͖Δ ▸ ෼ׂͨ͠+BWB$PO fi H͸@Import΍  
ίϯϙʔωϯτεΩϟϯͰ౷߹͢Δ ▸ ઃఆ஋΍#FBOΛ؀ڥ͝ͱʹ࢖͍෼͚Δʹ͸   ϓϩϑΝΠϧΛར༻͢Δ ▸ #FBOͷੜ੒ϓϩηε͸   ᶃҰཡද࡞੒ˠᶄίϯετϥΫλ࣮ߦˠᶅޙॲཧ 64

ߋͳΔֶशͷͨΊʹ ▸ 4QSJOHపఈೖ໳ʢᠳӭࣾʣ ▸ IUUQTXXXTIPFJTIBDPKQCPPLEFUBJM ▸ 4QSJOHެࣜϦϑΝϨϯεʢಛʹ$PSFͷ෦෼ʣ ▸ <ӳޠ>IUUQTEPDTTQSJOHJPTQSJOHGSBNFXPSL
EPDTDVSSFOUSFGFSFODFIUNMJOEFYIUNM ▸ <೔ຊޠ>IUUQTTQSJOHQMFJBEFTJPTQSJOH GSBNFXPSLEPDTDVSSFOUSFGFSFODFIUNM 65

▸ ͜ͷηογϣϯ͕   ະདྷͷ4QSJOHϓϩϑΣογϣφϧͷ   ͓໾ʹཱͯΕ͹خ͍͠Ͱ͢ʂ 66

プロになるためのSpring上級知識 #jsug / advanced-spring-for-professionals

プロになるためのSpring上級知識 #jsug / advanced-spring-for-professionals

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