7_Работа с БД

build.gradle.kts

@@ -19,6 +19,11 @@ repositories {
 
 dependencies {
 	implementation("org.springframework.boot:spring-boot-starter")
+	implementation("org.springframework.boot:spring-boot-starter-web")
+	implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+	runtimeOnly("org.postgresql:postgresql")
+	compileOnly("org.projectlombok:lombok")
+	annotationProcessor("org.projectlombok:lombok")
 	testImplementation("org.springframework.boot:spring-boot-starter-test")
 	testRuntimeOnly("org.junit.platform:junit-platform-launcher")
 }

docker-compose.yaml

@@ -0,0 +1,14 @@
+services:
+  todo:
+    image: postgres:latest
+    environment:
+      - POSTGRES_USER=admin
+      - POSTGRES_PASSWORD=maozedong
+      - POSTGRES_DB=todo
+    ports:
+      - "5432:5432"
+    volumes:
+      - todo_data:/var/lib/postgresql/data
+
+volumes:
+  todo_data:

src/main/java/org/javaspringcourse/controller/TodoController.java

@@ -0,0 +1,27 @@
+package org.javaspringcourse.controller;
+
+import lombok.RequiredArgsConstructor;
+import org.javaspringcourse.dto.TodoDto;
+import org.javaspringcourse.service.TodoService;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/todo")
+@RequiredArgsConstructor
+public class TodoController {
+    private final TodoService todoService;
+
+    @GetMapping("/get")
+    public List<TodoDto> getAllTodo() {
+        return todoService.findAll();
+    }
+
+    @PostMapping("/create")
+    @ResponseStatus(HttpStatus.CREATED)
+    public void createTodo(@RequestBody TodoDto todoDto) {
+        todoService.save(todoDto);
+    }
+}

src/main/java/org/javaspringcourse/dto/TodoDto.java

@@ -0,0 +1,5 @@
+package org.javaspringcourse.dto;
+
+import java.util.List;
+
+public record TodoDto(String name, List<String> events) {}

src/main/java/org/javaspringcourse/model/TodoEntity.java

@@ -0,0 +1,32 @@
+package org.javaspringcourse.model;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import java.util.HashSet;
+import java.util.Set;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@Entity
+@Table(name = "todo")
+public class TodoEntity {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private long id;
+
+    @Column(nullable = false)
+    private String name;
+
+    @ElementCollection
+    @CollectionTable(name = "events", joinColumns = @JoinColumn(name = "todo_id"))
+    private Set<String> events = new HashSet<String>();
+
+    public TodoEntity(String name, Set<String> events) {
+        this.name = name;
+        this.events = events;
+    }
+}

src/main/java/org/javaspringcourse/repository/TodoEntityRepository.java

@@ -0,0 +1,8 @@
+package org.javaspringcourse.repository;
+
+import org.javaspringcourse.model.TodoEntity;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface TodoEntityRepository extends JpaRepository<TodoEntity, Long> {}

src/main/java/org/javaspringcourse/service/TodoService.java

@@ -0,0 +1,34 @@
+package org.javaspringcourse.service;
+
+import lombok.RequiredArgsConstructor;
+import org.javaspringcourse.dto.TodoDto;
+import org.javaspringcourse.model.TodoEntity;
+import org.javaspringcourse.repository.TodoEntityRepository;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.HashSet;
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+public class TodoService {
+    private final TodoEntityRepository todoEntityRepository;
+
+    @Transactional(readOnly = true)
+    public List<TodoDto> findAll() {
+        return todoEntityRepository.findAll().stream()
+                .map(this::toDto)
+                .toList();
+    }
+
+    private TodoDto toDto(TodoEntity todo) {
+        return new TodoDto(todo.getName(), todo.getEvents().stream().toList());
+    }
+
+    @Transactional
+    public void save(TodoDto todoDto) {
+        var todoEntity = new TodoEntity(todoDto.name(), new HashSet<>(todoDto.events()));
+        todoEntityRepository.save(todoEntity);
+    }
+}

src/main/resources/application.yaml

@@ -0,0 +1,8 @@
+spring:
+  datasource:
+    url: jdbc:postgresql://${POSTGRES_HOST:localhost}:${POSTGRES_PORT:5432}/${POSTGRES_DB:todo}
+    username: ${POSTGRES_USER:admin}
+    password: ${POSTGRES_PASSWORD:maozedong}
+  jpa:
+    hibernate:
+      ddl-auto: create-drop