Make the Spring Boot app a CRUD application

Author: Webenius

Diff for: .dockerignore

@@ -0,0 +1,3 @@
+node_modules
+dist
+*.log

Diff for: build.gradle

@@ -1,10 +1,10 @@
 plugins {
     id 'java'
-    id 'org.springframework.boot' version '3.3.4'
+    id 'org.springframework.boot' version '3.3.5'
     id 'io.spring.dependency-management' version '1.1.6'
 }
 
-group = 'com.example'
+group = 'com.webenius'
 version = '0.0.1-SNAPSHOT'
 
 java {
@@ -18,8 +18,10 @@ repositories {
 }
 
 dependencies {
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
     implementation 'org.springframework.boot:spring-boot-starter-web'
-    implementation 'org.springframework.boot:spring-boot-starter-actuator'
+    developmentOnly 'org.springframework.boot:spring-boot-docker-compose'
+    runtimeOnly 'org.postgresql:postgresql'
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
     testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
 }

Diff for: compose.yaml

@@ -0,0 +1,9 @@
+services:
+  postgres:
+    image: 'postgres:latest'
+    environment:
+      - 'POSTGRES_DB=mydatabase'
+      - 'POSTGRES_PASSWORD=password'
+      - 'POSTGRES_USER=user'
+    ports:
+      - '5432:5432'

Diff for: src/main/java/com/example/springbootapp/HelloController.java

@@ -1,5 +1,4 @@
-package com.example.springboot;
-
+package com.webenius.springbootapp;
 
 import java.util.Arrays;
 
@@ -10,13 +9,13 @@
 import org.springframework.context.annotation.Bean;
 
 @SpringBootApplication
-public class Application {
+public class CrudAppApplication {
 
     public static void main(String[] args) {
-        SpringApplication.run(Application.class, args);
+        SpringApplication.run(CrudAppApplication.class, args);
     }
 
-    @Bean
+    /*@Bean
     public CommandLineRunner commandLineRunner(ApplicationContext ctx) {
         return args -> {
 
@@ -29,6 +28,5 @@ public CommandLineRunner commandLineRunner(ApplicationContext ctx) {
             }
 
         };
-    }
-
+    }*/
 }

Diff for: src/main/java/com/example/springbootapp/Application.java renamed to src/main/java/com/webenius/springbootapp/CrudAppApplication.java

@@ -0,0 +1,47 @@
+package com.webenius.springbootapp.controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+import com.webenius.springbootapp.model.User;
+import com.webenius.springbootapp.repository.UserRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/users")
+public class UserController {
+
+    @Autowired
+    private UserRepository userRepository;
+
+    @GetMapping
+    public List<User> getAllUsers() {
+        return userRepository.findAll();
+    }
+
+    @PostMapping
+    public User createUser(@RequestBody User user) {
+        return userRepository.save(user);
+    }
+
+    @GetMapping("/{id}")
+    public User getUserById(@PathVariable Long id) {
+        return userRepository.findById(id).orElseThrow(() -> new RuntimeException("User not found with id " + id));
+    }
+
+    @PutMapping("/{id}")
+    public User updateUser(@PathVariable Long id, @RequestBody User userDetails) {
+        User user = userRepository.findById(id).orElseThrow(() -> new RuntimeException("User not found with id " + id));
+        user.setName(userDetails.getName());
+        user.setEmail(userDetails.getEmail());
+        return userRepository.save(user);
+    }
+
+    @DeleteMapping("/{id}")
+    public String deleteUser(@PathVariable Long id) {
+        userRepository.deleteById(id);
+        return "User deleted with id " + id;
+    }
+}

Diff for: src/main/java/com/webenius/springbootapp/controller/UserController.java

@@ -0,0 +1,49 @@
+package com.webenius.springbootapp.model;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+
+@Entity
+public class User {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    private String name;
+    private String email;
+
+    public User() {
+    }
+
+    public User(Long id, String name, String email) {
+        this.id = id;
+        this.name = name;
+        this.email = email;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+}

Diff for: src/main/java/com/webenius/springbootapp/model/User.java

@@ -0,0 +1,7 @@
+package com.webenius.springbootapp.repository;
+
+import com.webenius.springbootapp.model.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface UserRepository extends JpaRepository<User, Long> {
+}

Diff for: src/main/java/com/webenius/springbootapp/repository/UserRepository.java

@@ -1 +1,3 @@
 spring.application.name=spring-boot-app
+spring.sql.init.mode=always
+spring.jpa.hibernate.ddl-auto=create

Diff for: src/main/resources/application.properties

@@ -0,0 +1,15 @@
+DROP TABLE IF EXISTS User; -- don't do this on a production environment
+
+CREATE TABLE User (
+    id varchar(255) NOT NULL,
+    name varchar(255) NOT NULL,
+    email varchar(255) NOT NULL,
+    PRIMARY KEY (id)
+);
+
+INSERT INTO User
+    (id, name, email)
+VALUES (1,'John Doe','[email protected]');
+INSERT INTO User
+    (id, name, email)
+VALUES (2,'Jane Smith','[email protected]');

Diff for: src/main/resources/schema.sql

@@ -1,4 +1,4 @@
-package com.example.springboot;
+package com.webenius.springbootapp;
 
 import org.junit.jupiter.api.Test;
 

Diff for: src/test/java/com/example/springbootapp/HelloControllerITest.java renamed to src/test/java/com/webenius/springbootapp/HelloControllerITest.java

@@ -1,4 +1,4 @@
-package com.example.springboot;
+package com.webenius.springbootapp;
 
 import static org.hamcrest.Matchers.equalTo;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;

Diff for: src/test/java/com/example/springbootapp/HelloControllerTest.java renamed to src/test/java/com/webenius/springbootapp/HelloControllerTest.java

@@ -1,4 +1,4 @@
-package com.example.springbootapp;
+package com.webenius.springbootapp;
 
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;