From e94d701af31e22f0c8a66d0fac2459b22ab258ec Mon Sep 17 00:00:00 2001
From: sgoudham <sgoudham@gmail.com>
Date: Wed, 20 Jan 2021 13:32:50 +0000
Subject: [PATCH] Demonstrate Bean Autowiring

---
 .../conference/with/autowiring/AppConfig.java |  9 +++++
 .../with/autowiring/Application.java          | 21 ++++++++++++
 .../with/autowiring/model/Speaker.java        | 28 +++++++++++++++
 .../HibernateSpeakerRepositoryImpl.java       | 18 ++++++++++
 .../repository/SpeakerRepository.java         |  9 +++++
 .../autowiring/service/SpeakerService.java    |  9 +++++
 .../service/SpeakerServiceImpl.java           | 34 +++++++++++++++++++
 7 files changed, 128 insertions(+)
 create mode 100644 Spring/src/main/java/conference/with/autowiring/AppConfig.java
 create mode 100644 Spring/src/main/java/conference/with/autowiring/Application.java
 create mode 100644 Spring/src/main/java/conference/with/autowiring/model/Speaker.java
 create mode 100644 Spring/src/main/java/conference/with/autowiring/repository/HibernateSpeakerRepositoryImpl.java
 create mode 100644 Spring/src/main/java/conference/with/autowiring/repository/SpeakerRepository.java
 create mode 100644 Spring/src/main/java/conference/with/autowiring/service/SpeakerService.java
 create mode 100644 Spring/src/main/java/conference/with/autowiring/service/SpeakerServiceImpl.java

diff --git a/Spring/src/main/java/conference/with/autowiring/AppConfig.java b/Spring/src/main/java/conference/with/autowiring/AppConfig.java
new file mode 100644
index 0000000..bbca220
--- /dev/null
+++ b/Spring/src/main/java/conference/with/autowiring/AppConfig.java
@@ -0,0 +1,9 @@
+package conference.with.autowiring;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan({"conference.with.autowiring"})
+public class AppConfig {
+}
diff --git a/Spring/src/main/java/conference/with/autowiring/Application.java b/Spring/src/main/java/conference/with/autowiring/Application.java
new file mode 100644
index 0000000..e959466
--- /dev/null
+++ b/Spring/src/main/java/conference/with/autowiring/Application.java
@@ -0,0 +1,21 @@
+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);
+    }
+}
diff --git a/Spring/src/main/java/conference/with/autowiring/model/Speaker.java b/Spring/src/main/java/conference/with/autowiring/model/Speaker.java
new file mode 100644
index 0000000..a568b96
--- /dev/null
+++ b/Spring/src/main/java/conference/with/autowiring/model/Speaker.java
@@ -0,0 +1,28 @@
+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;
+    }
+}
diff --git a/Spring/src/main/java/conference/with/autowiring/repository/HibernateSpeakerRepositoryImpl.java b/Spring/src/main/java/conference/with/autowiring/repository/HibernateSpeakerRepositoryImpl.java
new file mode 100644
index 0000000..b30f070
--- /dev/null
+++ b/Spring/src/main/java/conference/with/autowiring/repository/HibernateSpeakerRepositoryImpl.java
@@ -0,0 +1,18 @@
+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"));
+        }};
+    }
+}
diff --git a/Spring/src/main/java/conference/with/autowiring/repository/SpeakerRepository.java b/Spring/src/main/java/conference/with/autowiring/repository/SpeakerRepository.java
new file mode 100644
index 0000000..dd1c30b
--- /dev/null
+++ b/Spring/src/main/java/conference/with/autowiring/repository/SpeakerRepository.java
@@ -0,0 +1,9 @@
+package conference.with.autowiring.repository;
+
+import conference.with.autowiring.model.Speaker;
+
+import java.util.List;
+
+public interface SpeakerRepository {
+    List<Speaker> findAll();
+}
diff --git a/Spring/src/main/java/conference/with/autowiring/service/SpeakerService.java b/Spring/src/main/java/conference/with/autowiring/service/SpeakerService.java
new file mode 100644
index 0000000..3c5dbdc
--- /dev/null
+++ b/Spring/src/main/java/conference/with/autowiring/service/SpeakerService.java
@@ -0,0 +1,9 @@
+package conference.with.autowiring.service;
+
+import conference.with.autowiring.model.Speaker;
+
+import java.util.List;
+
+public interface SpeakerService {
+    List<Speaker> findAll();
+}
diff --git a/Spring/src/main/java/conference/with/autowiring/service/SpeakerServiceImpl.java b/Spring/src/main/java/conference/with/autowiring/service/SpeakerServiceImpl.java
new file mode 100644
index 0000000..04f4383
--- /dev/null
+++ b/Spring/src/main/java/conference/with/autowiring/service/SpeakerServiceImpl.java
@@ -0,0 +1,34 @@
+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();
+    }
+}