Demonstrate Spring

Spring/pom.xml

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+<?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>
+
+    <groupId>com.pluralsight</groupId>
+    <artifactId>Spring</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <source>14</source>
+                    <target>14</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-context</artifactId>
+            <version>5.2.0.RELEASE</version>
+        </dependency>
+    </dependencies>
+
+</project>

Spring/src/main/java/conference/AppConfig.java

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+package conference;
+
+import conference.repository.HibernateSpeakerRepositoryImpl;
+import conference.repository.SpeakerRepository;
+import conference.service.SpeakerService;
+import conference.service.SpeakerServiceImpl;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+
+public class AppConfig {
+
+    @Bean(name = "speakerService")
+    public SpeakerService getSpeakerService() {
+        return new SpeakerServiceImpl(getSpeakerRepository());
+    }
+
+    @Bean(name = "speakerRepository")
+    public SpeakerRepository getSpeakerRepository() {
+        return new HibernateSpeakerRepositoryImpl();
+    }
+}

Spring/src/main/java/conference/Application.java

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+package conference;
+
+import conference.service.SpeakerService;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+
+public class Application {
+    public static void main(String[] args) {
+
+        ApplicationContext applicationContext = new AnnotationConfigApplicationContext(AppConfig.class);
+        SpeakerService service = applicationContext.getBean("speakerService", SpeakerService.class);
+
+        System.out.println(service.findAll().get(0).getForename());
+    }
+}

Spring/src/main/java/conference/model/Speaker.java

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+package conference.model;
+
+public class Speaker {
+
+    private String forename;
+    private String surname;
+
+    public Speaker(String forename, String surname) {
+        this.forename = forename;
+        this.surname = surname;
+    }
+
+    public String getForename() {
+        return forename;
+    }
+
+    public void setForename(String forename) {
+        this.forename = forename;
+    }
+
+    public String getSurname() {
+        return surname;
+    }
+
+    public void setSurname(String surname) {
+        this.surname = surname;
+    }
+}

Spring/src/main/java/conference/repository/HibernateSpeakerRepositoryImpl.java

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+package conference.repository;
+
+import conference.model.Speaker;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class HibernateSpeakerRepositoryImpl implements SpeakerRepository {
+
+    @Override
+    public List<Speaker> findAll() {
+        return new ArrayList<>() {{
+            add(new Speaker("Goudham", "Suresh"));
+        }};
+    }
+}

Spring/src/main/java/conference/repository/SpeakerRepository.java

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+package conference.repository;
+
+import conference.model.Speaker;
+
+import java.util.List;
+
+public interface SpeakerRepository {
+    List<Speaker> findAll();
+}

Spring/src/main/java/conference/service/SpeakerService.java

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+package conference.service;
+
+import conference.model.Speaker;
+
+import java.util.List;
+
+public interface SpeakerService {
+    List<Speaker> findAll();
+}

Spring/src/main/java/conference/service/SpeakerServiceImpl.java

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+package conference.service;
+
+import conference.model.Speaker;
+import conference.repository.SpeakerRepository;
+
+import java.util.List;
+
+public class SpeakerServiceImpl implements SpeakerService {
+
+    private SpeakerRepository speakerRepository;
+
+    public SpeakerServiceImpl(SpeakerRepository speakerRepository) {
+        this.speakerRepository = speakerRepository;
+    }
+
+    @Override
+    public List<Speaker> findAll() {
+        return speakerRepository.findAll();
+    }
+
+    public void setSpeakerRepository(SpeakerRepository speakerRepository) {
+        this.speakerRepository = speakerRepository;
+    }
+}