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→Build
</syntaxhighlight>
</syntaxhighlight>
== Dev Tools ==
==Dev Tools==
Add at pom.xml<syntaxhighlight lang="xml">
Add at pom.xml<syntaxhighlight lang="xml">
....
....
Provides:
Provides:
* Develop server reloading on changes (pom.xml changes are not detected)
*Develop server reloading on changes (pom.xml changes are not detected)
== Example: Spring Boot with Data JPA and in memory database H2 ==
=== /pom.xml ===
<syntaxhighlight lang="xml">
....
<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>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-devtools</artifactId>
<scope>runtime</scope>
</dependency>
....
</dependencies>
....
</syntaxhighlight>
=== /src/main/resources/application.properties ===
<syntaxhighlight lang="java">
spring.datasource.url=jdbc:h2:mem:testdb
# If using Spring Boot >=2.5.0 the following line is also required
spring.jpa.defer-datasource-initialization=true
</syntaxhighlight>database will be accessible via http://localhost:8080/h2-console
=== /src/main/java/com/in28minutes/learnspringboot/courses/bean/Course.java ===
<syntaxhighlight lang="java">
package com.in28minutes.learnspringboot.courses.bean;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.GeneratedValue;
// import javax.persistence.Column;
// @Entity(name="db_table_name")
@Entity
public class Course {
@Id
@GeneratedValue
private long id;
// @Column(name="db_column_name")
private String name;
private String author;
public Course(long id, String name, String author){
super();
this.id = id;
this.name = name;
this.author = author;
}
public String toString() {
return "Course [id=" + id + ", name= " + name + ", author=" + author + " ]";
}
public long getId() {
return id;
}
public String getName() {
return name;
}
public String getAuthor() {
return author;
}
}
</syntaxhighlight>
=== src/main/resources/data.sql ===
querys in this file will be executed at startup automatically<syntaxhighlight lang="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');
</syntaxhighlight>
=== /src/main/java/com/in28minutes/learnspringboot/courses/repository/CourseRepository.java ===
<syntaxhighlight lang="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> {}
</syntaxhighlight>
----
=== /src/main/java/com/in28minutes/learnspringboot/courses/controller/CourseController.java ===
<syntaxhighlight lang="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
}
</syntaxhighlight>
==Build==
==Build==