Demonstrate Bean Autowiring

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

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+package conference.with.autowiring;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan({"conference.with.autowiring"})
+public class AppConfig {
+}

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

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+package conference.with.autowiring;
+
+import conference.with.autowiring.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);
+
+        showObjectAddress(applicationContext.getBean("speakerService", SpeakerService.class));
+        System.out.println(service.findAll().get(0).getForename());
+        showObjectAddress(applicationContext.getBean("speakerService", SpeakerService.class));
+    }
+
+    private static void showObjectAddress(SpeakerService speakerService) {
+        System.out.println(speakerService);
+    }
+}

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

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+package conference.with.autowiring.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/with/autowiring/repository/HibernateSpeakerRepositoryImpl.java

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

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

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

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

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

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

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+package conference.with.autowiring.service;
+
+import conference.with.autowiring.model.Speaker;
+import conference.with.autowiring.repository.SpeakerRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service("speakerService")
+public class SpeakerServiceImpl implements SpeakerService {
+
+    private SpeakerRepository speakerRepository;
+
+    public SpeakerServiceImpl() {
+        System.out.println("SpeakerServiceImpl No Args Constructor Called");
+    }
+
+    public SpeakerServiceImpl(SpeakerRepository speakerRepository) {
+        System.out.println("SpeakerServiceImpl Repository Constructor Called");
+        this.speakerRepository = speakerRepository;
+    }
+
+    @Autowired
+    public void setSpeakerRepository(SpeakerRepository speakerRepository) {
+        System.out.println("SpeakerServiceImpl Setter Called");
+        this.speakerRepository = speakerRepository;
+    }
+
+    @Override
+    public List<Speaker> findAll() {
+        return speakerRepository.findAll();
+    }
+}