JAVA-19545 Move articles from spring-core-2 module to spring-di-3 module (#13708)

* JAVA-19545 Move articles from spring-core-2 module to spring-di-3 module * JAVA-19545 Move articles from spring-core-4 module to spring-di-3 module
2023-03-26 23:51:27 +05:30
parent 07ef7b2186
commit 2e129bd64b
41 changed files with 4 additions and 4 deletions
@@ -7,4 +7,8 @@ This module contains articles about dependency injection with Spring
 - [@Lookup Annotation in Spring](https://www.baeldung.com/spring-lookup)
 - [Spring @Autowired Field Null – Common Causes and Solutions](https://www.baeldung.com/spring-autowired-field-null)
 - [Finding All Beans with a Custom Annotation](https://www.baeldung.com/spring-injecting-all-annotated-beans)
+- [Guide to Spring @Autowired](http://www.baeldung.com/spring-autowire)
+- [@Order in Spring](http://www.baeldung.com/spring-order)
+- [How to dynamically Autowire a Bean in Spring](https://www.baeldung.com/spring-dynamic-autowire)
+- [Spring @Import Annotation](https://www.baeldung.com/spring-import-annotation)
 - More articles: [[<-- prev]](../spring-di-2)
@@ -0,0 +1,11 @@
+package com.baeldung.autowire.sample;
+
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+
+public class App {
+    public static void main(String[] args) {
+        AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(AppConfig.class);
+        FooService fooService = ctx.getBean(FooService.class);
+        fooService.doStuff();
+    }
+}
@@ -0,0 +1,10 @@
+package com.baeldung.autowire.sample;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan("com.baeldung.autowire.sample")
+public class AppConfig {
+
+}
@@ -0,0 +1,13 @@
+package com.baeldung.autowire.sample;
+
+import org.springframework.stereotype.Component;
+
+@FormatterType("Bar")
+@Component
+public class BarFormatter implements Formatter {
+
+    public String format() {
+        return "bar";
+    }
+
+}
@@ -0,0 +1,5 @@
+package com.baeldung.autowire.sample;
+
+public class FooDAO {
+
+}
@@ -0,0 +1,13 @@
+package com.baeldung.autowire.sample;
+
+import org.springframework.stereotype.Component;
+
+@FormatterType("Foo")
+@Component
+public class FooFormatter implements Formatter {
+
+    public String format() {
+        return "foo";
+    }
+
+}
@@ -0,0 +1,31 @@
+package com.baeldung.autowire.sample;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+/**
+ * This class presents a field, a constructor, and a setter injection type.
+ * Usually, we'd stick with a single approach for a given property. This is just an educational code.
+ */
+@Component
+public class FooService {
+
+    @Autowired
+    @FormatterType("Foo")
+    private Formatter formatter;
+
+    @Autowired
+    public FooService(@FormatterType("Foo") Formatter formatter) {
+        this.formatter = formatter;
+    }
+
+    @Autowired
+    public void setFormatter(@FormatterType("Foo") Formatter formatter) {
+        this.formatter = formatter;
+    }
+
+    public String doStuff() {
+        return formatter.format();
+    }
+
+}
@@ -0,0 +1,7 @@
+package com.baeldung.autowire.sample;
+
+public interface Formatter {
+
+    String format();
+
+}
@@ -0,0 +1,17 @@
+package com.baeldung.autowire.sample;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.springframework.beans.factory.annotation.Qualifier;
+
+@Qualifier
+@Target({ ElementType.FIELD, ElementType.METHOD, ElementType.TYPE, ElementType.PARAMETER })
+@Retention(RetentionPolicy.RUNTIME)
+public @interface FormatterType {
+
+    String value();
+
+}
@@ -0,0 +1,27 @@
+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 static final String SERVICE_NAME_SUFFIX = "regionService";
+    private final BeanFactory beanFactory;
+
+    @Autowired
+    public BeanFactoryDynamicAutowireService(BeanFactory beanFactory) {
+        this.beanFactory = beanFactory;
+    }
+
+    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;
+    }
+
+}
@@ -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 CustomMapFromListDynamicAutowireService {
+    private final Map<String, RegionService> servicesByCountryCode;
+
+    @Autowired
+    public CustomMapFromListDynamicAutowireService(List<RegionService> regionServices) {
+        servicesByCountryCode = regionServices.stream()
+                .collect(Collectors.toMap(RegionService::getISOCountryCode, Function.identity()));
+    }
+
+    public boolean isServerActive(String isoCountryCode, int serverId) {
+        RegionService service = servicesByCountryCode.get(isoCountryCode);
+
+        return service.isServerActive(serverId);
+    }
+}
@@ -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 {
+}
@@ -0,0 +1,16 @@
+package com.baeldung.dynamic.autowire;
+
+import org.springframework.stereotype.Service;
+
+@Service("GBregionService")
+public class GBRegionService implements RegionService {
+    @Override
+    public boolean isServerActive(int serverId) {
+        return false;
+    }
+
+    @Override
+    public String getISOCountryCode() {
+        return "GB";
+    }
+}
@@ -0,0 +1,7 @@
+package com.baeldung.dynamic.autowire;
+
+public interface RegionService {
+    boolean isServerActive(int serverId);
+
+    String getISOCountryCode();
+}
@@ -0,0 +1,16 @@
+package com.baeldung.dynamic.autowire;
+
+import org.springframework.stereotype.Service;
+
+@Service("USregionService")
+public class USRegionService implements RegionService {
+    @Override
+    public boolean isServerActive(int serverId) {
+        return true;
+    }
+
+    @Override
+    public String getISOCountryCode() {
+        return "US";
+    }
+}
@@ -0,0 +1,9 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+@Configuration
+@Import({ MammalConfiguration.class, BirdConfig.class })
+class AnimalConfiguration {
+}
@@ -0,0 +1,9 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan
+public class AnimalScanConfiguration {
+}
@@ -0,0 +1,4 @@
+package com.baeldung.importannotation.animal;
+
+class Bird {
+}
@@ -0,0 +1,13 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+class BirdConfig {
+
+    @Bean
+    Bird bird() {
+        return new Bird();
+    }
+}
@@ -0,0 +1,7 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.stereotype.Component;
+
+@Component(value = "bug")
+class Bug {
+}
@@ -0,0 +1,9 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+@Configuration
+@Import(Bug.class)
+class BugConfig {
+}
@@ -0,0 +1,4 @@
+package com.baeldung.importannotation.animal;
+
+class Cat {
+}
@@ -0,0 +1,13 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+class CatConfig {
+
+    @Bean
+    Cat cat() {
+        return new Cat();
+    }
+}
@@ -0,0 +1,4 @@
+package com.baeldung.importannotation.animal;
+
+class Dog {
+}
@@ -0,0 +1,13 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+class DogConfig {
+
+    @Bean
+    Dog dog() {
+        return new Dog();
+    }
+}
@@ -0,0 +1,9 @@
+package com.baeldung.importannotation.animal;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+@Configuration
+@Import({ DogConfig.class, CatConfig.class })
+class MammalConfiguration {
+}
@@ -0,0 +1,11 @@
+package com.baeldung.importannotation.zoo;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+
+import com.baeldung.importannotation.animal.AnimalScanConfiguration;
+
+@Configuration
+@Import(AnimalScanConfiguration.class)
+class ZooApplication {
+}
@@ -0,0 +1,15 @@
+package com.baeldung.order;
+
+import org.springframework.core.Ordered;
+import org.springframework.core.annotation.Order;
+import org.springframework.stereotype.Component;
+
+@Component
+@Order(Ordered.LOWEST_PRECEDENCE)
+public class Average implements Rating {
+
+    @Override
+    public int getRating() {
+        return 3;
+    }
+}
@@ -0,0 +1,14 @@
+package com.baeldung.order;
+
+import org.springframework.stereotype.Component;
+import org.springframework.core.annotation.Order;
+
+@Component
+@Order(1)
+public class Excellent implements Rating {
+
+    @Override
+    public int getRating() {
+        return 1;
+    }
+}
@@ -0,0 +1,14 @@
+package com.baeldung.order;
+
+import org.springframework.core.annotation.Order;
+import org.springframework.stereotype.Component;
+
+@Component
+@Order(2)
+public class Good implements Rating {
+
+    @Override
+    public int getRating() {
+        return 2;
+    }
+}
--- a/Show More
+++ b/Show More