From ba42ca2dbbd07c5e89abeda3aef065f50bb74a82 Mon Sep 17 00:00:00 2001 From: Maciej Glowka Date: Sun, 3 May 2020 22:05:04 +0200 Subject: [PATCH 1/3] BAEL-3829: example of dynamic bean autowiring in Spring --- .../BeanFactoryDynamicAutowireService.java | 22 ++++++++++++++ .../autowire/DynamicAutowireConfig.java | 9 ++++++ .../InterfaceDynamicAutowireService.java | 26 ++++++++++++++++ .../dynamic/autowire/RegionService.java | 7 +++++ .../dynamic/autowire/USARegionService.java | 16 ++++++++++ .../dynamic/autowire/UkRegionService.java | 16 ++++++++++ .../DynamicAutowireIntegrationTest.java | 30 +++++++++++++++++++ 7 files changed, 126 insertions(+) create mode 100644 spring-core-4/src/main/java/com/baeldung/dynamic/autowire/BeanFactoryDynamicAutowireService.java create mode 100644 spring-core-4/src/main/java/com/baeldung/dynamic/autowire/DynamicAutowireConfig.java create mode 100644 spring-core-4/src/main/java/com/baeldung/dynamic/autowire/InterfaceDynamicAutowireService.java create mode 100644 spring-core-4/src/main/java/com/baeldung/dynamic/autowire/RegionService.java create mode 100644 spring-core-4/src/main/java/com/baeldung/dynamic/autowire/USARegionService.java create mode 100644 spring-core-4/src/main/java/com/baeldung/dynamic/autowire/UkRegionService.java create mode 100644 spring-core-4/src/test/java/com/baeldung/dynamic/autowire/DynamicAutowireIntegrationTest.java diff --git a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/BeanFactoryDynamicAutowireService.java b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/BeanFactoryDynamicAutowireService.java new file mode 100644 index 0000000000..5f8f2e548e --- /dev/null +++ b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/BeanFactoryDynamicAutowireService.java @@ -0,0 +1,22 @@ +package com.baeldung.dynamic.autowire; + +import org.springframework.beans.factory.BeanFactory; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.stereotype.Service; + +@Service +public class BeanFactoryDynamicAutowireService { + private final BeanFactory beanFactory; + + @Autowired + public BeanFactoryDynamicAutowireService(BeanFactory beanFactory) { + this.beanFactory = beanFactory; + } + + public boolean isServerActive(String countryCode, int serverId) { + RegionService service = beanFactory.getBean(countryCode, RegionService.class); + + return service.isServerActive(serverId); + } + +} diff --git a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/DynamicAutowireConfig.java b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/DynamicAutowireConfig.java new file mode 100644 index 0000000000..256bd9b495 --- /dev/null +++ b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/DynamicAutowireConfig.java @@ -0,0 +1,9 @@ +package com.baeldung.dynamic.autowire; + +import org.springframework.context.annotation.ComponentScan; +import org.springframework.context.annotation.Configuration; + +@Configuration +@ComponentScan("com.baeldung.dynamic.autowire") +public class DynamicAutowireConfig { +} diff --git a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/InterfaceDynamicAutowireService.java b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/InterfaceDynamicAutowireService.java new file mode 100644 index 0000000000..ad655f5c42 --- /dev/null +++ b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/InterfaceDynamicAutowireService.java @@ -0,0 +1,26 @@ +package com.baeldung.dynamic.autowire; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.stereotype.Service; + +import java.util.List; +import java.util.Map; +import java.util.function.Function; +import java.util.stream.Collectors; + +@Service +public class InterfaceDynamicAutowireService { + private final Map servicesByCountryCode; + + @Autowired + public InterfaceDynamicAutowireService(List regionServices) { + servicesByCountryCode = regionServices.stream() + .collect(Collectors.toMap(RegionService::getCountryCode, Function.identity())); + } + + public boolean isServerActive(String countryCode, int serverId) { + RegionService service = servicesByCountryCode.get(countryCode); + + return service.isServerActive(serverId); + } +} diff --git a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/RegionService.java b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/RegionService.java new file mode 100644 index 0000000000..f9f92d045a --- /dev/null +++ b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/RegionService.java @@ -0,0 +1,7 @@ +package com.baeldung.dynamic.autowire; + +public interface RegionService { + boolean isServerActive(int serverId); + + String getCountryCode(); +} diff --git a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/USARegionService.java b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/USARegionService.java new file mode 100644 index 0000000000..cfad0146e5 --- /dev/null +++ b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/USARegionService.java @@ -0,0 +1,16 @@ +package com.baeldung.dynamic.autowire; + +import org.springframework.stereotype.Service; + +@Service("usa") +public class USARegionService implements RegionService { + @Override + public boolean isServerActive(int serverId) { + return true; + } + + @Override + public String getCountryCode() { + return "usa"; + } +} diff --git a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/UkRegionService.java b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/UkRegionService.java new file mode 100644 index 0000000000..1fbe8ed96e --- /dev/null +++ b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/UkRegionService.java @@ -0,0 +1,16 @@ +package com.baeldung.dynamic.autowire; + +import org.springframework.stereotype.Service; + +@Service("uk") +public class UkRegionService implements RegionService { + @Override + public boolean isServerActive(int serverId) { + return false; + } + + @Override + public String getCountryCode() { + return "uk"; + } +} diff --git a/spring-core-4/src/test/java/com/baeldung/dynamic/autowire/DynamicAutowireIntegrationTest.java b/spring-core-4/src/test/java/com/baeldung/dynamic/autowire/DynamicAutowireIntegrationTest.java new file mode 100644 index 0000000000..5afab69c53 --- /dev/null +++ b/spring-core-4/src/test/java/com/baeldung/dynamic/autowire/DynamicAutowireIntegrationTest.java @@ -0,0 +1,30 @@ +package com.baeldung.dynamic.autowire; + +import org.junit.Test; +import org.junit.runner.RunWith; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.test.context.ContextConfiguration; +import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; + +import static org.hamcrest.CoreMatchers.is; +import static org.junit.Assert.assertThat; + +@RunWith(SpringJUnit4ClassRunner.class) +@ContextConfiguration(classes = DynamicAutowireConfig.class) +public class DynamicAutowireIntegrationTest { + + @Autowired + private BeanFactoryDynamicAutowireService beanFactoryDynamicAutowireService; + + @Autowired + private InterfaceDynamicAutowireService interfaceDynamicAutowireService; + + @Test + public void testConstructWorkerByJava() { + assertThat(beanFactoryDynamicAutowireService.isServerActive("uk", 101), is(false)); + assertThat(interfaceDynamicAutowireService.isServerActive("uk", 101), is(false)); + + assertThat(beanFactoryDynamicAutowireService.isServerActive("usa", 101), is(true)); + assertThat(interfaceDynamicAutowireService.isServerActive("usa", 101), is(true)); + } +} From 13f2b10c8b7bff8dd99fa5831434ce97247815a6 Mon Sep 17 00:00:00 2001 From: Maciej Glowka Date: Wed, 6 May 2020 00:35:07 +0200 Subject: [PATCH 2/3] BAEL-3829: added more distinct bean names, changed country codes to ISO codes --- .../autowire/BeanFactoryDynamicAutowireService.java | 9 +++++++-- ...va => CustomMapFromListDynamicAutowireService.java} | 10 +++++----- .../{UkRegionService.java => GBRegionService.java} | 8 ++++---- .../com/baeldung/dynamic/autowire/RegionService.java | 2 +- .../{USARegionService.java => USRegionService.java} | 8 ++++---- .../autowire/DynamicAutowireIntegrationTest.java | 10 +++++----- 6 files changed, 26 insertions(+), 21 deletions(-) rename spring-core-4/src/main/java/com/baeldung/dynamic/autowire/{InterfaceDynamicAutowireService.java => CustomMapFromListDynamicAutowireService.java} (55%) rename spring-core-4/src/main/java/com/baeldung/dynamic/autowire/{UkRegionService.java => GBRegionService.java} (58%) rename spring-core-4/src/main/java/com/baeldung/dynamic/autowire/{USARegionService.java => USRegionService.java} (58%) diff --git a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/BeanFactoryDynamicAutowireService.java b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/BeanFactoryDynamicAutowireService.java index 5f8f2e548e..4ad4420489 100644 --- a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/BeanFactoryDynamicAutowireService.java +++ b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/BeanFactoryDynamicAutowireService.java @@ -6,6 +6,7 @@ import org.springframework.stereotype.Service; @Service public class BeanFactoryDynamicAutowireService { + private static final String SERVICE_NAME_SUFFIX = "regionService"; private final BeanFactory beanFactory; @Autowired @@ -13,10 +14,14 @@ public class BeanFactoryDynamicAutowireService { this.beanFactory = beanFactory; } - public boolean isServerActive(String countryCode, int serverId) { - RegionService service = beanFactory.getBean(countryCode, RegionService.class); + public boolean isServerActive(String isoCountryCode, int serverId) { + RegionService service = beanFactory.getBean(getRegionServiceBeanName(isoCountryCode), RegionService.class); return service.isServerActive(serverId); } + private String getRegionServiceBeanName(String isoCountryCode) { + return isoCountryCode + SERVICE_NAME_SUFFIX; + } + } diff --git a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/InterfaceDynamicAutowireService.java b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/CustomMapFromListDynamicAutowireService.java similarity index 55% rename from spring-core-4/src/main/java/com/baeldung/dynamic/autowire/InterfaceDynamicAutowireService.java rename to spring-core-4/src/main/java/com/baeldung/dynamic/autowire/CustomMapFromListDynamicAutowireService.java index ad655f5c42..e04c345d51 100644 --- a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/InterfaceDynamicAutowireService.java +++ b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/CustomMapFromListDynamicAutowireService.java @@ -9,17 +9,17 @@ import java.util.function.Function; import java.util.stream.Collectors; @Service -public class InterfaceDynamicAutowireService { +public class CustomMapFromListDynamicAutowireService { private final Map servicesByCountryCode; @Autowired - public InterfaceDynamicAutowireService(List regionServices) { + public CustomMapFromListDynamicAutowireService(List regionServices) { servicesByCountryCode = regionServices.stream() - .collect(Collectors.toMap(RegionService::getCountryCode, Function.identity())); + .collect(Collectors.toMap(RegionService::getISOCountryCode, Function.identity())); } - public boolean isServerActive(String countryCode, int serverId) { - RegionService service = servicesByCountryCode.get(countryCode); + public boolean isServerActive(String isoCountryCode, int serverId) { + RegionService service = servicesByCountryCode.get(isoCountryCode); return service.isServerActive(serverId); } diff --git a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/UkRegionService.java b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/GBRegionService.java similarity index 58% rename from spring-core-4/src/main/java/com/baeldung/dynamic/autowire/UkRegionService.java rename to spring-core-4/src/main/java/com/baeldung/dynamic/autowire/GBRegionService.java index 1fbe8ed96e..8c6a1372d4 100644 --- a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/UkRegionService.java +++ b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/GBRegionService.java @@ -2,15 +2,15 @@ package com.baeldung.dynamic.autowire; import org.springframework.stereotype.Service; -@Service("uk") -public class UkRegionService implements RegionService { +@Service("GBregionService") +public class GBRegionService implements RegionService { @Override public boolean isServerActive(int serverId) { return false; } @Override - public String getCountryCode() { - return "uk"; + public String getISOCountryCode() { + return "GB"; } } diff --git a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/RegionService.java b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/RegionService.java index f9f92d045a..a2caf38ab3 100644 --- a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/RegionService.java +++ b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/RegionService.java @@ -3,5 +3,5 @@ package com.baeldung.dynamic.autowire; public interface RegionService { boolean isServerActive(int serverId); - String getCountryCode(); + String getISOCountryCode(); } diff --git a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/USARegionService.java b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/USRegionService.java similarity index 58% rename from spring-core-4/src/main/java/com/baeldung/dynamic/autowire/USARegionService.java rename to spring-core-4/src/main/java/com/baeldung/dynamic/autowire/USRegionService.java index cfad0146e5..a2d5f47553 100644 --- a/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/USARegionService.java +++ b/spring-core-4/src/main/java/com/baeldung/dynamic/autowire/USRegionService.java @@ -2,15 +2,15 @@ package com.baeldung.dynamic.autowire; import org.springframework.stereotype.Service; -@Service("usa") -public class USARegionService implements RegionService { +@Service("USregionService") +public class USRegionService implements RegionService { @Override public boolean isServerActive(int serverId) { return true; } @Override - public String getCountryCode() { - return "usa"; + public String getISOCountryCode() { + return "US"; } } diff --git a/spring-core-4/src/test/java/com/baeldung/dynamic/autowire/DynamicAutowireIntegrationTest.java b/spring-core-4/src/test/java/com/baeldung/dynamic/autowire/DynamicAutowireIntegrationTest.java index 5afab69c53..3eb6268e97 100644 --- a/spring-core-4/src/test/java/com/baeldung/dynamic/autowire/DynamicAutowireIntegrationTest.java +++ b/spring-core-4/src/test/java/com/baeldung/dynamic/autowire/DynamicAutowireIntegrationTest.java @@ -17,14 +17,14 @@ public class DynamicAutowireIntegrationTest { private BeanFactoryDynamicAutowireService beanFactoryDynamicAutowireService; @Autowired - private InterfaceDynamicAutowireService interfaceDynamicAutowireService; + private CustomMapFromListDynamicAutowireService customMapFromListDynamicAutowireService; @Test public void testConstructWorkerByJava() { - assertThat(beanFactoryDynamicAutowireService.isServerActive("uk", 101), is(false)); - assertThat(interfaceDynamicAutowireService.isServerActive("uk", 101), is(false)); + assertThat(beanFactoryDynamicAutowireService.isServerActive("GB", 101), is(false)); + assertThat(customMapFromListDynamicAutowireService.isServerActive("GB", 101), is(false)); - assertThat(beanFactoryDynamicAutowireService.isServerActive("usa", 101), is(true)); - assertThat(interfaceDynamicAutowireService.isServerActive("usa", 101), is(true)); + assertThat(beanFactoryDynamicAutowireService.isServerActive("US", 101), is(true)); + assertThat(customMapFromListDynamicAutowireService.isServerActive("US", 101), is(true)); } } From 0e33f2d06cd9f71bdfa810e1ecd6bf2c754b4cab Mon Sep 17 00:00:00 2001 From: Maciej Glowka Date: Thu, 7 May 2020 23:25:43 +0200 Subject: [PATCH 3/3] BAEL-3829: fixed test method names --- .../dynamic/autowire/DynamicAutowireIntegrationTest.java | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/spring-core-4/src/test/java/com/baeldung/dynamic/autowire/DynamicAutowireIntegrationTest.java b/spring-core-4/src/test/java/com/baeldung/dynamic/autowire/DynamicAutowireIntegrationTest.java index 3eb6268e97..56582ecb66 100644 --- a/spring-core-4/src/test/java/com/baeldung/dynamic/autowire/DynamicAutowireIntegrationTest.java +++ b/spring-core-4/src/test/java/com/baeldung/dynamic/autowire/DynamicAutowireIntegrationTest.java @@ -20,10 +20,13 @@ public class DynamicAutowireIntegrationTest { private CustomMapFromListDynamicAutowireService customMapFromListDynamicAutowireService; @Test - public void testConstructWorkerByJava() { + public void givenDynamicallyAutowiredBean_whenCheckingServerInGB_thenServerIsNotActive() { assertThat(beanFactoryDynamicAutowireService.isServerActive("GB", 101), is(false)); assertThat(customMapFromListDynamicAutowireService.isServerActive("GB", 101), is(false)); + } + @Test + public void givenDynamicallyAutowiredBean_whenCheckingServerInUS_thenServerIsActive() { assertThat(beanFactoryDynamicAutowireService.isServerActive("US", 101), is(true)); assertThat(customMapFromListDynamicAutowireService.isServerActive("US", 101), is(true)); }