Merge pull request #11614 from hkhan/JAVA-8290-split-spring-di-module

[JAVA-8290] Split spring-di module

pom.xml

@@ -652,6 +652,7 @@
                 <module>spring-data-rest-querydsl</module>
                 <module>spring-di</module>
                 <module>spring-di-2</module>
+                <module>spring-di-3</module>
                 <module>spring-drools</module>
 
                 <module>spring-ejb</module>

spring-di-2/README.md

@@ -9,4 +9,6 @@ This module contains articles about dependency injection with Spring
 - [Spring – Injecting Collections](https://www.baeldung.com/spring-injecting-collections)
 - [Wiring in Spring: @Autowired, @Resource and @Inject](https://www.baeldung.com/spring-annotations-resource-inject-autowire)
 - [Injecting Spring Beans into Unmanaged Objects](https://www.baeldung.com/spring-inject-bean-into-unmanaged-objects)
-- More articles: [[<-- prev]](/spring-di)
+- [Constructor Dependency Injection in Spring](https://www.baeldung.com/constructor-injection-in-spring)
+- [Circular Dependencies in Spring](https://www.baeldung.com/circular-dependencies-in-spring)
+- More articles: [[<-- prev]](../spring-di)[[more -->]](../spring-di-3)

spring-di-2/pom.xml

@@ -14,37 +14,41 @@
         <relativePath>../parent-spring-5</relativePath>
     </parent>
 
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-dependencies</artifactId>
+                <version>${spring-boot.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
     <dependencies>
         <dependency>
-            <groupId>org.springframework</groupId>
+            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-test</artifactId>
+            <artifactId>spring-boot-starter-web</artifactId>
-            <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-jpa</artifactId>
-            <version>${spring-boot.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-web</artifactId>
-            <version>${spring-boot.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-aspects</artifactId>
-            <version>${spring.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.projectlombok</groupId>
-            <artifactId>lombok</artifactId>
-            <version>${lombok.version}</version>
         </dependency>
         <dependency>
             <groupId>javax.inject</groupId>
             <artifactId>javax.inject</artifactId>
             <version>${javax.inject.version}</version>
         </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+        </dependency>
     </dependencies>
 
     <build>
@@ -74,7 +78,7 @@
     </build>
 
     <properties>
-        <spring-boot.version>2.3.1.RELEASE</spring-boot.version>
+        <spring-boot.version>2.6.1</spring-boot.version>
         <aspectj-plugin.version>1.11</aspectj-plugin.version>
         <javax.inject.version>1</javax.inject.version>
     </properties>

spring-di-2/src/main/java/com/baeldung/constructordi/Config.java

@@ -1,11 +1,10 @@
 package com.baeldung.constructordi;
 
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.ComponentScan;
-import org.springframework.context.annotation.Configuration;
-
 import com.baeldung.constructordi.domain.Engine;
 import com.baeldung.constructordi.domain.Transmission;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
 
 @Configuration
 @ComponentScan("com.baeldung.constructordi")

spring-di-2/src/main/java/com/baeldung/constructordi/SpringRunner.java

@@ -1,11 +1,10 @@
 package com.baeldung.constructordi;
 
+import com.baeldung.constructordi.domain.Car;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.support.ClassPathXmlApplicationContext;
 
-import com.baeldung.constructordi.domain.Car;
-
 public class SpringRunner {
     public static void main(String[] args) {
         Car toyota = getCarFromXml();

spring-di-2/src/main/java/com/baeldung/constructordi/domain/Car.java

@@ -5,8 +5,9 @@ import org.springframework.stereotype.Component;
 
 @Component
 public class Car {
-    private Engine engine;
+
-    private Transmission transmission;
+    private final Engine engine;
+    private final Transmission transmission;
 
     @Autowired
     public Car(Engine engine, Transmission transmission) {

spring-di-2/src/main/java/com/baeldung/constructordi/domain/Engine.java

@@ -1,8 +1,9 @@
 package com.baeldung.constructordi.domain;
 
 public class Engine {
-    private String type;
+
-    private int volume;
+    private final String type;
+    private final int volume;
 
     public Engine(String type, int volume) {
         this.type = type;

spring-di-2/src/main/java/com/baeldung/constructordi/domain/Transmission.java

@@ -1,7 +1,8 @@
 package com.baeldung.constructordi.domain;
 
 public class Transmission {
-	private String type;
+
+	private final String type;
 
 	public Transmission(String type) {
 		this.type = type;

spring-di-2/src/test/java/com/baeldung/constructordi/ConstructorDependencyInjectionIntegrationTest.java

@@ -1,7 +1,6 @@
 package com.baeldung.constructordi;
 
-import static org.assertj.core.api.Assertions.assertThat;
+import com.baeldung.constructordi.domain.Car;
-
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.context.ApplicationContext;
@@ -11,7 +10,7 @@ import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 import org.springframework.test.context.support.AnnotationConfigContextLoader;
 
-import com.baeldung.constructordi.domain.Car;
+import static org.assertj.core.api.Assertions.assertThat;
 
 @RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(loader = AnnotationConfigContextLoader.class, classes = Config.class)

spring-di-2/src/test/java/com/baeldung/di/aspectj/PersonUnitTest.java

@@ -10,10 +10,12 @@ import static org.junit.Assert.assertEquals;
 @RunWith(SpringRunner.class)
 @ContextConfiguration(classes = AspectJConfig.class)
 public class PersonUnitTest {
+
     @Test
     public void givenUnmanagedObjects_whenInjectingIdService_thenIdValueIsCorrectlySet() {
         PersonObject personObject = new PersonObject("Baeldung");
         personObject.generateId();
+
         assertEquals(1, personObject.getId());
         assertEquals("Baeldung", personObject.getName());
 

spring-di-3/README.md

@@ -0,0 +1,8 @@
+## Spring Dependency Injection
+
+This module contains articles about dependency injection with Spring
+
+### Relevant Articles
+
+- [@Lookup Annotation in Spring](https://www.baeldung.com/spring-lookup)
+- More articles: [[<-- prev]](../spring-di-2)

spring-di-3/pom.xml

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>spring-di-3</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <name>spring-di-3</name>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-spring-5</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-spring-5</relativePath>
+    </parent>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-dependencies</artifactId>
+                <version>${spring-boot.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <spring-boot.version>2.6.1</spring-boot.version>
+    </properties>
+
+</project>

spring-di-3/src/main/java/com/baeldung/methodinjections/AppConfig.java

@@ -5,6 +5,5 @@ import org.springframework.context.annotation.Configuration;
 
 @Configuration
 @ComponentScan(basePackages = "com.baeldung.methodinjections")
-
 public class AppConfig {
 }

spring-di-3/src/main/java/com/baeldung/methodinjections/Grader.java

@@ -1,9 +1,9 @@
 package com.baeldung.methodinjections;
 
-import java.util.Collection;
-
 import org.springframework.stereotype.Component;
 
+import java.util.Collection;
+
 @Component
 public class Grader {
 

spring-di-3/src/main/java/com/baeldung/methodinjections/SchoolNotification.java

@@ -1,13 +1,13 @@
 package com.baeldung.methodinjections;
 
-import java.util.ArrayList;
-import java.util.Collection;
-
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.config.ConfigurableBeanFactory;
 import org.springframework.context.annotation.Scope;
 import org.springframework.stereotype.Component;
 
+import java.util.ArrayList;
+import java.util.Collection;
+
 @Component("schoolNotification")
 @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
 public class SchoolNotification {
@@ -19,7 +19,7 @@ public class SchoolNotification {
 
     public SchoolNotification(String name) {
         this.name = name;
-        this.marks = new ArrayList<Integer>();
+        this.marks = new ArrayList<>();
     }
 
     public String addMark(Integer mark) {

spring-di-3/src/main/java/com/baeldung/methodinjections/StudentServices.java

@@ -1,15 +1,15 @@
 package com.baeldung.methodinjections;
 
-import java.util.HashMap;
-import java.util.Map;
-
 import org.springframework.beans.factory.annotation.Lookup;
 import org.springframework.stereotype.Component;
 
+import java.util.HashMap;
+import java.util.Map;
+
 @Component("studentService")
 public abstract class StudentServices {
 
-    private Map<String, SchoolNotification> notes = new HashMap<>();
+    private final Map<String, SchoolNotification> notes = new HashMap<>();
 
     @Lookup
     protected abstract SchoolNotification getNotification(String name);

spring-di-3/src/main/resources/application.properties

@@ -0,0 +1 @@
+

spring-di-3/src/test/java/com/baeldung/methodinjections/StudentIntegrationTest.java

@@ -0,0 +1,42 @@
+package com.baeldung.methodinjections;
+
+import org.junit.Test;
+import org.junit.jupiter.api.AfterEach;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+
+public class StudentIntegrationTest {
+
+    private ConfigurableApplicationContext context;
+
+    @AfterEach
+    public void tearDown() {
+        context.close();
+    }
+
+    @Test
+    public void whenLookupMethodCalled_thenNewInstanceReturned() {
+        context = new AnnotationConfigApplicationContext(AppConfig.class);
+
+        Student student1 = context.getBean("studentBean", Student.class);
+        Student student2 = context.getBean("studentBean", Student.class);
+
+        assertEquals(student1, student2);
+        assertNotEquals(student1.getNotification("Alex"), student2.getNotification("Bethany"));
+    }
+
+    @Test
+    public void whenAbstractGetterMethodInjects_thenNewInstanceReturned() {
+        context = new ClassPathXmlApplicationContext("beans.xml");
+
+        StudentServices services = context.getBean("studentServices", StudentServices.class);
+
+        assertEquals("PASS", services.appendMark("Alex", 76));
+        assertEquals("FAIL", services.appendMark("Bethany", 44));
+        assertEquals("PASS", services.appendMark("Claire", 96));
+    }
+}

spring-di-3/src/test/resources/logback-test.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="15 seconds" debug="false">
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%d{ISO8601}]-[%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

spring-di/README.md

@@ -5,13 +5,10 @@ This module contains articles about dependency injection with Spring
 ### Relevant Articles
 
 - [The Spring @Qualifier Annotation](https://www.baeldung.com/spring-qualifier-annotation)
-- [Constructor Dependency Injection in Spring](https://www.baeldung.com/constructor-injection-in-spring)
 - [Spring Autowiring of Generic Types](https://www.baeldung.com/spring-autowire-generics)
 - [Guice vs Spring – Dependency Injection](https://www.baeldung.com/guice-spring-dependency-injection)
 - [Injecting Prototype Beans into a Singleton Instance in Spring](https://www.baeldung.com/spring-inject-prototype-bean-into-singleton)
-- [@Lookup Annotation in Spring](https://www.baeldung.com/spring-lookup)
 - [Controlling Bean Creation Order with @DependsOn Annotation](https://www.baeldung.com/spring-depends-on)
 - [Unsatisfied Dependency in Spring](https://www.baeldung.com/spring-unsatisfied-dependency)
-- [Circular Dependencies in Spring](https://www.baeldung.com/circular-dependencies-in-spring)
 - [XML-Based Injection in Spring](https://www.baeldung.com/spring-xml-injection)
-- More articles: [[next -->]](/spring-di-2)
+- More articles: [[next -->]](../spring-di-2)

spring-di/src/test/java/com/baeldung/methodinjections/StudentIntegrationTest.java

@@ -1,31 +0,0 @@
-package com.baeldung.methodinjections;
-
-import org.junit.Assert;
-import org.junit.Test;
-import org.springframework.context.annotation.AnnotationConfigApplicationContext;
-import org.springframework.context.support.ClassPathXmlApplicationContext;
-
-public class StudentIntegrationTest {
-
-    @Test
-    public void whenLookupMethodCalled_thenNewInstanceReturned() {
-        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
-        Student student1 = context.getBean("studentBean", Student.class);
-        Student student2 = context.getBean("studentBean", Student.class);
-
-        Assert.assertEquals(student1, student2);
-        Assert.assertNotEquals(student1.getNotification("Alex"), student2.getNotification("Bethany"));
-        context.close();
-    }
-
-    @Test
-    public void whenAbstractGetterMethodInjects_thenNewInstanceReturned() {
-        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
-        StudentServices services = context.getBean("studentServices", StudentServices.class);
-
-        Assert.assertEquals("PASS", services.appendMark("Alex", 76));
-        Assert.assertEquals("FAIL", services.appendMark("Bethany", 44));
-        Assert.assertEquals("PASS", services.appendMark("Claire", 96));
-        context.close();
-    }
-}