Merge pull request #10560 from vishal1023/origin/BAEL-4785
Origin/bael 4785
This commit is contained in:
commit
cbd6ad341f
spring-core-5/src
main/java/com/baeldung/springbean/naming
component
configuration
controller
service
test/java/com/baeldung/springbean/naming
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package com.baeldung.springbean.naming.component;
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public interface Animal {
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String name();
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}
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package com.baeldung.springbean.naming.component;
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import org.springframework.beans.factory.annotation.Qualifier;
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import org.springframework.stereotype.Component;
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@Component
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@Qualifier("cat")
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public class Cat implements Animal {
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@Override
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public String name() {
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return "Cat";
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}
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}
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@ -0,0 +1,7 @@
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package com.baeldung.springbean.naming.component;
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import org.springframework.stereotype.Component;
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@Component("myBean")
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public class CustomComponent {
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}
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package com.baeldung.springbean.naming.component;
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import org.springframework.beans.factory.annotation.Qualifier;
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import org.springframework.stereotype.Component;
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@Component
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@Qualifier("dog")
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public class Dog implements Animal {
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@Override
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public String name() {
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return "Dog";
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}
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}
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@ -0,0 +1,14 @@
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package com.baeldung.springbean.naming.configuration;
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import com.baeldung.springbean.naming.service.AuditService;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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@Configuration
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public class AuditConfiguration {
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@Bean
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public AuditService audit() {
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return new AuditService();
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}
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}
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@ -0,0 +1,19 @@
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package com.baeldung.springbean.naming.configuration;
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import com.baeldung.springbean.naming.component.CustomComponent;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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@Configuration("configuration")
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public class MyConfiguration {
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@Bean("qualifierComponent")
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public CustomComponent component() {
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return new CustomComponent();
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}
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@Bean("beanComponent")
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public CustomComponent myComponent() {
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return new CustomComponent();
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}
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}
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@ -0,0 +1,12 @@
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package com.baeldung.springbean.naming.controller;
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import com.baeldung.springbean.naming.service.MessagingService;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Controller;
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@Controller
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public class MessagingController {
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@Autowired
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private MessagingService service;
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}
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@ -0,0 +1,4 @@
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package com.baeldung.springbean.naming.service;
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public class AuditService {
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}
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package com.baeldung.springbean.naming.service;
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import org.springframework.stereotype.Service;
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@Service
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public class LoggingService {
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}
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package com.baeldung.springbean.naming.service;
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public interface MessagingService {
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}
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package com.baeldung.springbean.naming.service;
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import com.baeldung.springbean.naming.component.CustomComponent;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Qualifier;
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import org.springframework.stereotype.Service;
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@Service
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public class MessagingServiceImpl implements MessagingService {
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@Autowired
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@Qualifier("qualifierComponent")
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private CustomComponent customComponent;
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}
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package com.baeldung.springbean.naming.service;
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import com.baeldung.springbean.naming.component.Animal;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Qualifier;
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import org.springframework.stereotype.Service;
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@Service
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public class PetShow {
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@Autowired
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@Qualifier("dog")
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private Animal dog;
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@Autowired
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@Qualifier("cat")
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private Animal cat;
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public Animal getDog() {
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return dog;
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}
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public Animal getCat() {
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return cat;
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}
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}
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@ -0,0 +1,65 @@
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package com.baeldung.springbean.naming;
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import com.baeldung.springbean.naming.component.Cat;
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import com.baeldung.springbean.naming.component.Dog;
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import com.baeldung.springbean.naming.service.PetShow;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.extension.ExtendWith;
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import org.springframework.context.annotation.AnnotationConfigApplicationContext;
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import org.springframework.test.context.junit.jupiter.SpringExtension;
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import static org.assertj.core.api.Assertions.assertThat;
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import static org.junit.jupiter.api.Assertions.assertNotNull;
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@ExtendWith(SpringExtension.class)
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public class SpringBeanNamingUnitTest {
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private AnnotationConfigApplicationContext context;
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@BeforeEach
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void setUp() {
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context = new AnnotationConfigApplicationContext();
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context.scan("com.baeldung.springbean.naming");
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context.refresh();
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}
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// To name a bean spring gets the class name and converts the first letter to lowercase.
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// Default naming strategy of the spring bean which is using class level annotation
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@Test
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void givenLoggingServiceBeanIsCreated_whenThereIsNoValueProvided_thenBeanNameShouldBeDefaultName() {
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assertNotNull(context.getBean("loggingService"));
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}
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// In this case, to name a bean spring gets the class name and converts the first letter to lowercase.
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@Test
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void givenAuditServiceBeanIsCreatedWithMethodLevelAnnotation_whenThereIsNoValueProvided_thenBeanNameShouldBeTheNameOfMethod() {
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assertNotNull(context.getBean("audit"));
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}
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// spring will create the bean of type CustomComponent with the name "myBean".
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// As we're explicitly giving the name to the bean, spring will use this name to refer to it.
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@Test
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void givenCustomComponentBeanIsCreate_whenThereIsCustomNameGivenToBean_thenBeanShouldBeIdentifiedByThatName() {
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assertNotNull(context.getBean("myBean"));
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}
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@Test
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void givenCustomComponentBeanIsCreated_whenCustomNameIsGivenOnMethodLevelAnnotation_thenBeanShouldBeIdentifiedByThatName() {
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assertNotNull(context.getBean("beanComponent"));
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assertNotNull(context.getBean("configuration"));
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assertNotNull(context.getBean("qualifierComponent"));
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}
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@Test
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void givenMultipleImplementationsOfAnimal_whenFieldIsInjectedWithQualifiedName_thenTheSpecificBeanShouldGetInjected() {
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PetShow petShow = (PetShow) context.getBean("petShow");
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assertNotNull(context.getBean("cat"));
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assertNotNull(context.getBean("dog"));
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assertThat(petShow.getCat().getClass()).isEqualTo(Cat.class);
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assertThat(petShow.getDog().getClass()).isEqualTo(Dog.class);
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}
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}
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