JAVA-19544 Move Spring @Primary Annotation article from spring-core-2 module to spring-boot-annotations-2 module (#13687)

spring-boot-modules/spring-boot-annotations-2/README.md

@@ -6,4 +6,5 @@ This module contains articles about Spring Boot annotations
 
 - [Spring Conditional Annotations](https://www.baeldung.com/spring-conditional-annotations)
 - [Guide to @SpringBootConfiguration in Spring Boot](https://www.baeldung.com/springbootconfiguration-annotation)
+- [Spring @Primary Annotation](http://www.baeldung.com/spring-primary)
 - More articles: [[<-- prev]](/spring-boot-modules/spring-boot-annotations)

spring-boot-modules/spring-boot-annotations-2/src/main/java/com/baeldung/primary/Config.java

@@ -0,0 +1,22 @@
+package com.baeldung.primary;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+
+@Configuration
+@ComponentScan(basePackages="com.baeldung.primary")
+public class Config {
+
+    @Bean
+    public Employee johnEmployee(){
+        return new Employee("John");
+    }
+
+    @Bean
+    @Primary
+    public Employee tonyEmployee(){
+        return new Employee("Tony");
+    }
+}

spring-boot-modules/spring-boot-annotations-2/src/main/java/com/baeldung/primary/DepartmentManager.java

@@ -0,0 +1,11 @@
+package com.baeldung.primary;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class DepartmentManager implements Manager {
+    @Override
+    public String getManagerName() {
+        return "Department manager";
+    }
+}

spring-boot-modules/spring-boot-annotations-2/src/main/java/com/baeldung/primary/Employee.java

@@ -0,0 +1,20 @@
+package com.baeldung.primary;
+
+/**
+ * Created by Gebruiker on 7/17/2018.
+ */
+public class Employee {
+
+    private String name;
+
+    public Employee(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return "Employee{" +
+                "name='" + name + '\'' +
+                '}';
+    }
+}

spring-boot-modules/spring-boot-annotations-2/src/main/java/com/baeldung/primary/GeneralManager.java

@@ -0,0 +1,14 @@
+package com.baeldung.primary;
+
+import org.springframework.context.annotation.Primary;
+import org.springframework.stereotype.Component;
+
+@Component
+@Primary
+public class GeneralManager implements Manager {
+
+    @Override
+    public String getManagerName() {
+        return "General manager";
+    }
+}

spring-boot-modules/spring-boot-annotations-2/src/main/java/com/baeldung/primary/Manager.java

@@ -0,0 +1,8 @@
+package com.baeldung.primary;
+
+/**
+ * Created by Gebruiker on 7/19/2018.
+ */
+public interface Manager {
+    String getManagerName();
+}

spring-boot-modules/spring-boot-annotations-2/src/main/java/com/baeldung/primary/ManagerService.java

@@ -0,0 +1,17 @@
+package com.baeldung.primary;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+/**
+ * Created by Gebruiker on 7/19/2018.
+ */@Service
+public class ManagerService {
+
+    @Autowired
+    private Manager manager;
+
+    public Manager getManager() {
+        return manager;
+    }
+}

spring-boot-modules/spring-boot-annotations-2/src/main/java/com/baeldung/primary/PrimaryApplication.java

@@ -0,0 +1,20 @@
+package com.baeldung.primary;
+
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+
+
+public class PrimaryApplication {
+
+    public static void main(String[] args) {
+        AnnotationConfigApplicationContext context
+                = new AnnotationConfigApplicationContext(Config.class);
+
+        Employee employee = context.getBean(Employee.class);
+        System.out.println(employee);
+
+        ManagerService service = context.getBean(ManagerService.class);
+        Manager manager = service.getManager();
+        System.out.println(manager.getManagerName());
+    }
+    
+}