springboot-in-10-steps spring-boot upgrade

00-framework-tool-introductions/05.Spring-Boot-Introduction-In-10-Steps/1.md

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+<!---
+Current Directory : /in28Minutes/git/java-a-course-for-beginners/52-learn-spring-boot
+-->
+
+## Complete Code Example
+
+
+### /pom.xml
+
+```xml
+<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.4.4</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>com.in28minutes</groupId>
+	<artifactId>learn-spring-boot</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>learn-spring-boot</name>
+	<description>Demo project for Spring Boot</description>
+	<properties>
+		<java.version>11</java.version>
+	</properties>
+	<dependencies>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>com.h2database</groupId>
+			<artifactId>h2</artifactId>
+			<scope>runtime</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-devtools</artifactId>
+			<scope>runtime</scope>
+		</dependency>
+
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
+```
+---
+
+### /src/test/java/com/in28minutes/learnspringboot/LearnSpringBootApplicationTests.java
+
+```java
+package com.in28minutes.learnspringboot;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class LearnSpringBootApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}
+```
+---
+
+### /src/main/resources/data.sql
+
+```
+insert into COURSE (ID, AUTHOR, NAME)
+values (100001, 'in28minutes', 'Learn Microservices'); 
+insert into COURSE (ID, AUTHOR, NAME)
+values (100002, 'in28minutes', 'Learn FullStack with React and Angular'); 
+insert into COURSE (ID, AUTHOR, NAME)
+values (100003, 'in28minutes', 'Learn AWS, GCP and Azure'); 
+```
+---
+
+### /src/main/resources/application.properties
+
+```properties
+#logging.level.org.springframework=DEBUG
+#management.endpoints.web.exposure.include=*
+management.endpoints.web.exposure.include=health,metrics
+spring.datasource.url=jdbc:h2:mem:testdb
+```
+---
+
+### /src/main/java/com/in28minutes/learnspringboot/LearnSpringBootApplication.java
+
+```java
+package com.in28minutes.learnspringboot;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+//@SpringBootConfiguration
+//@EnableAutoConfiguration
+//@ComponentScan
+public class LearnSpringBootApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(LearnSpringBootApplication.class, args);
+	}
+
+}
+```
+---
+
+### /src/main/java/com/in28minutes/learnspringboot/courses/repository/CourseRepository.java
+
+```java
+package com.in28minutes.learnspringboot.courses.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import com.in28minutes.learnspringboot.courses.bean.Course;
+
+public interface CourseRepository extends JpaRepository<Course, Long> {
+
+}
+```
+---
+
+### /src/main/java/com/in28minutes/learnspringboot/courses/bean/Course.java
+
+```java
+package com.in28minutes.learnspringboot.courses.bean;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+public class Course {
+
+	@Id
+	@GeneratedValue
+	private long id;
+
+	//@Column(name="course_name")
+	private String name;
+
+	private String author;
+
+	public Course() {
+	}
+
+	public Course(long id, String name, String author) {
+		super();
+		this.id = id;
+		this.name = name;
+		this.author = author;
+	}
+
+	public long getId() {
+		return id;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public String getAuthor() {
+		return author;
+	}
+
+	@Override
+	public String toString() {
+		return "Course [id=" + id + ", name=" + name + ", author=" + author + "]";
+	}
+
+}
+```
+---
+
+### /src/main/java/com/in28minutes/learnspringboot/courses/controller/CourseController.java
+
+```java
+package com.in28minutes.learnspringboot.courses.controller;
+
+import java.util.List;
+import java.util.Optional;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.in28minutes.learnspringboot.courses.bean.Course;
+import com.in28minutes.learnspringboot.courses.repository.CourseRepository;
+
+@RestController
+public class CourseController {
+
+	@Autowired
+	private CourseRepository repository;
+
+	// http://localhost:8080/courses
+	@GetMapping("/courses")
+	public List<Course> getAllCourses() {		
+		return repository.findAll();
+	}
+
+	//// http://localhost:8080/courses/1
+	@GetMapping("/courses/{id}")
+	public Course getCourseDetails(@PathVariable long id) {
+
+		Optional<Course> course = repository.findById(id);
+
+		if(course.isEmpty()) {
+			throw new RuntimeException("Course not found with id " + id);
+		}
+
+		return course.get();
+	}
+
+	/*
+	POST http://localhost:8080/courses
+	{
+		  "name": "Learn DevOps",
+		  "author": "in28minutes"
+	}*/
+
+	//POST - Create a new resource (/courses)
+	@PostMapping("/courses")
+	public void createCourse(@RequestBody Course course){
+		repository.save(course);		
+	}
+
+	/*
+	PUT - http://localhost:8080/courses/100001
+	{
+		 "id": 100001,
+		 "name": "Learn Microservices 2",
+		 "author": "in28minutes"
+		}
+	*/
+
+	//PUT - Update/Replace a resource (/courses/1)
+	@PutMapping("/courses/{id}")
+	public void updateCourse(@PathVariable long id, @RequestBody Course course){
+		repository.save(course);		
+	}
+
+
+	//DELETE - Delete a resource (/courses/1)
+	@DeleteMapping("/courses/{id}")
+	public void deleteCourse(@PathVariable long id){
+		repository.deleteById(id);
+	}
+
+
+//	docker run --detach 
+//	--env MYSQL_ROOT_PASSWORD=dummypassword 
+//	--env MYSQL_USER=courses-user 
+//	--env MYSQL_PASSWORD=dummycourses 
+//	--env MYSQL_DATABASE=courses 
+//	--name mysql
+//	--publish 3306:3306 mysql:5.7
+}
+```
+---