chore(hw-03): sync user-service code from hw-02

2026-10-01 16:34:42 +04:00
parent f574239025
commit 9ac7c5667f
19 changed files with 509 additions and 431 deletions
@@ -0,0 +1,13 @@
+.PHONY: up down build run
+
+up:
+	docker compose up -d
+
+down:
+	docker compose down
+
+build:
+	mvn clean package
+
+run:
+	mvn exec:java
@@ -0,0 +1,16 @@
+# User Service
+
+## Описание
+
+Консольное Java-приложение для CRUD-операций над сущностью `User` с использованием Hibernate и PostgreSQL без Spring.
+
+PostgreSQL запускается в Docker через Docker Compose.
+
+## Команды Makefile
+
+| Команда      | Описание               |
+| ------------ | ---------------------- |
+| `make up`    | Запустить PostgreSQL.  |
+| `make down`  | Остановить PostgreSQL. |
+| `make build` | Собрать Maven-проект.  |
+| `make run`   | Запустить приложение.  |
@@ -0,0 +1,15 @@
+services:
+  postgres:
+    image: postgres:17
+    container_name: user-service-postgres
+    environment:
+      POSTGRES_DB: user_service
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+    ports:
+      - "5432:5432"
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+
+volumes:
+  postgres_data:
@@ -0,0 +1,124 @@
+<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>com.example</groupId>
+  <artifactId>user-service</artifactId>
+  <version>1.0-SNAPSHOT</version>
+
+  <name>user-service</name>
+  <!-- FIXME change it to the project's website -->
+  <url>http://www.example.com</url>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <maven.compiler.release>17</maven.compiler.release>
+  </properties>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>org.junit</groupId>
+        <artifactId>junit-bom</artifactId>
+        <version>5.11.0</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
+  <dependencies>
+
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+
+    <!-- Optionally: parameterized tests support -->
+
+    <!-- JUnit -->
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-params</artifactId>
+      <scope>test</scope>
+    </dependency>
+
+    <!-- Hibernate ORM -->
+    <dependency>
+      <groupId>org.hibernate.orm</groupId>
+      <artifactId>hibernate-core</artifactId>
+      <version>7.4.10.Final</version>
+    </dependency>
+
+    <!-- PostgreSQL JDBC Driver -->
+    <dependency>
+      <groupId>org.postgresql</groupId>
+      <artifactId>postgresql</artifactId>
+      <version>42.7.8</version>
+    </dependency>
+
+  </dependencies>
+
+  <build>
+    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to
+      parent pom) -->
+      <plugins>
+        <!-- clean lifecycle, see
+        https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
+        <plugin>
+          <artifactId>maven-clean-plugin</artifactId>
+          <version>3.4.0</version>
+        </plugin>
+        <!-- default lifecycle, jar packaging: see
+        https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
+        <plugin>
+          <artifactId>maven-resources-plugin</artifactId>
+          <version>3.3.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <version>3.13.0</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-surefire-plugin</artifactId>
+          <version>3.3.0</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-jar-plugin</artifactId>
+          <version>3.4.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-install-plugin</artifactId>
+          <version>3.1.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-deploy-plugin</artifactId>
+          <version>3.1.2</version>
+        </plugin>
+        <!-- site lifecycle, see
+        https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
+        <plugin>
+          <artifactId>maven-site-plugin</artifactId>
+          <version>3.12.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-project-info-reports-plugin</artifactId>
+          <version>3.6.1</version>
+        </plugin>
+
+        <plugin>
+          <groupId>org.codehaus.mojo</groupId>
+          <artifactId>exec-maven-plugin</artifactId>
+          <version>3.5.0</version>
+          <configuration>
+            <mainClass>com.example.Main</mainClass>
+          </configuration>
+        </plugin>
+
+      </plugins>
+    </pluginManagement>
+  </build>
+</project>
@@ -0,0 +1,119 @@
+package com.example;
+
+import java.util.Scanner;
+
+public class Main {
+
+  public static void main(String[] args) {
+    UserDao userDao = new UserDao();
+    Scanner scanner = new Scanner(System.in);
+
+    try {
+      while (true) {
+        printMenu();
+
+        String choice = scanner.nextLine();
+
+        clearConsole();
+
+        try {
+          switch (choice) {
+            case "1" -> createUser(userDao, scanner);
+            case "2" -> findUser(userDao, scanner);
+            case "3" -> updateUser(userDao, scanner);
+            case "4" -> deleteUser(userDao, scanner);
+            case "0" -> {
+              return;
+            }
+            default -> System.out.println("Неизвестная команда.");
+          }
+        } catch (NumberFormatException e) {
+          System.out.println("Ошибка: введите корректное число.");
+        } catch (RuntimeException e) {
+          System.out.println("Ошибка при работе с базой данных.");
+        }
+      }
+    } finally {
+      scanner.close();
+      userDao.close();
+    }
+  }
+
+  private static void printMenu() {
+    System.out.println("\n1. Создать пользователя");
+    System.out.println("2. Найти пользователя");
+    System.out.println("3. Обновить пользователя");
+    System.out.println("4. Удалить пользователя");
+    System.out.println("0. Выход");
+    System.out.print("Выберите действие: ");
+  }
+
+  private static void createUser(UserDao userDao, Scanner scanner) {
+    User user = new User();
+
+    System.out.print("Имя: ");
+    user.setName(scanner.nextLine());
+
+    System.out.print("Email: ");
+    user.setEmail(scanner.nextLine());
+
+    System.out.print("Возраст: ");
+    user.setAge(Integer.parseInt(scanner.nextLine()));
+
+    userDao.create(user);
+
+    System.out.println("Пользователь создан: " + user);
+  }
+
+  private static void findUser(UserDao userDao, Scanner scanner) {
+    System.out.print("ID пользователя: ");
+    Long id = Long.parseLong(scanner.nextLine());
+
+    User user = userDao.findById(id);
+
+    if (user != null) {
+      System.out.println(user);
+    } else {
+      System.out.println("Пользователь не найден.");
+    }
+  }
+
+  private static void updateUser(UserDao userDao, Scanner scanner) {
+    System.out.print("ID пользователя: ");
+    Long id = Long.parseLong(scanner.nextLine());
+
+    User user = userDao.findById(id);
+
+    if (user == null) {
+      System.out.println("Пользователь не найден.");
+      return;
+    }
+
+    System.out.print("Новое имя: ");
+    user.setName(scanner.nextLine());
+
+    System.out.print("Новый email: ");
+    user.setEmail(scanner.nextLine());
+
+    System.out.print("Новый возраст: ");
+    user.setAge(Integer.parseInt(scanner.nextLine()));
+
+    userDao.update(user);
+
+    System.out.println("Пользователь обновлён.");
+  }
+
+  private static void deleteUser(UserDao userDao, Scanner scanner) {
+    System.out.print("ID пользователя: ");
+    Long id = Long.parseLong(scanner.nextLine());
+
+    userDao.deleteById(id);
+
+    System.out.println("Пользователь удалён.");
+  }
+
+  private static void clearConsole() {
+    System.out.print("\033[H\033[2J");
+    System.out.flush();
+  }
+}
@@ -0,0 +1,94 @@
+package com.example;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.PrePersist;
+import jakarta.persistence.Table;
+import java.time.LocalDateTime;
+
+@Entity
+@Table(name = "users")
+public class User {
+
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  private Long id;
+
+  @Column(nullable = false, length = 100)
+  private String name;
+
+  @Column(nullable = false, unique = true, length = 255)
+  private String email;
+
+  @Column(nullable = false)
+  private Integer age;
+
+  @Column(name = "created_at", nullable = false, updatable = false)
+  private LocalDateTime createdAt;
+
+  protected User() {}
+
+  public User(String name, String email, Integer age) {
+    this.name = name;
+    this.email = email;
+    this.age = age;
+  }
+
+  @PrePersist
+  protected void onCreate() {
+    createdAt = LocalDateTime.now();
+  }
+
+  public Long getId() {
+    return id;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public String getEmail() {
+    return email;
+  }
+
+  public Integer getAge() {
+    return age;
+  }
+
+  public LocalDateTime getCreatedAt() {
+    return createdAt;
+  }
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+  public void setEmail(String email) {
+    this.email = email;
+  }
+
+  public void setAge(Integer age) {
+    this.age = age;
+  }
+
+  @Override
+  public String toString() {
+    return "User{"
+        + "id="
+        + id
+        + ", name='"
+        + name
+        + '\''
+        + ", email='"
+        + email
+        + '\''
+        + ", age="
+        + age
+        + ", createdAt="
+        + createdAt
+        + '}';
+  }
+}
@@ -0,0 +1,96 @@
+package com.example;
+
+import org.hibernate.HibernateException;
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.Transaction;
+import org.hibernate.cfg.Configuration;
+
+public class UserDao {
+
+  private final SessionFactory sessionFactory;
+
+  public UserDao() {
+    sessionFactory =
+        new Configuration().configure().addAnnotatedClass(User.class).buildSessionFactory();
+  }
+
+  public User create(User user) {
+    Transaction transaction = null;
+
+    try (Session session = sessionFactory.openSession()) {
+      transaction = session.beginTransaction();
+
+      session.persist(user);
+
+      transaction.commit();
+
+      return user;
+    } catch (HibernateException e) {
+      handleException(transaction, e);
+      return null;
+    }
+  }
+
+  public User findById(Long id) {
+    try (Session session = sessionFactory.openSession()) {
+      return session.find(User.class, id);
+    } catch (HibernateException e) {
+      handleException(null, e);
+      return null;
+    }
+  }
+
+  public User update(User user) {
+    Transaction transaction = null;
+
+    try (Session session = sessionFactory.openSession()) {
+      transaction = session.beginTransaction();
+
+      User updatedUser = session.merge(user);
+
+      transaction.commit();
+
+      return updatedUser;
+    } catch (HibernateException e) {
+      handleException(transaction, e);
+      return null;
+    }
+  }
+
+  public void deleteById(Long id) {
+    Transaction transaction = null;
+
+    try (Session session = sessionFactory.openSession()) {
+      transaction = session.beginTransaction();
+
+      User user = session.find(User.class, id);
+
+      if (user != null) {
+        session.remove(user);
+      }
+
+      transaction.commit();
+    } catch (HibernateException e) {
+      handleException(transaction, e);
+    }
+  }
+
+  public void close() {
+    sessionFactory.close();
+  }
+
+  private void handleException(Transaction transaction, HibernateException e) {
+    if (transaction != null) {
+      try {
+        transaction.rollback();
+      } catch (HibernateException rollbackException) {
+        System.err.println("Ошибка при откате транзакции.");
+      }
+    }
+
+    System.err.println("Ошибка при работе с Hibernate: " + e.getMessage());
+
+    throw e;
+  }
+}
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "https://hibernate.org/dtd/hibernate-configuration-3.0.dtd">
+
+<hibernate-configuration>
+  <session-factory>
+
+    <property name="hibernate.connection.driver_class"> org.postgresql.Driver </property>
+
+    <property name="hibernate.connection.url"> jdbc:postgresql://localhost:5432/user_service </property>
+
+    <property name="hibernate.connection.username"> postgres </property>
+
+    <property name="hibernate.connection.password"> postgres </property>
+
+    <property name="hibernate.dialect"> org.hibernate.dialect.PostgreSQLDialect </property>
+
+    <property name="hibernate.show_sql"> true </property>
+
+    <property name="hibernate.format_sql"> true </property>
+
+    <property name="hibernate.hbm2ddl.auto"> update </property>
+
+    <!-- SQL logging -->
+
+    <property name="hibernate.show_sql">true</property>
+
+    <property name="hibernate.format_sql">true</property>
+
+    <property name="hibernate.highlight_sql">true</property>
+
+  </session-factory>
+</hibernate-configuration>