hibernate: basic working hibernate

Author: MarioCodes

hibernate/app/pom.xml

@@ -13,6 +13,9 @@
     <maven.shade.version>3.2.1</maven.shade.version>
 
     <!-- Normal Dependency Versions -->
+    <hibernate.core.version>5.4.3.Final</hibernate.core.version>
+    <hibernate.mysql.connector>8.0.16</hibernate.mysql.connector>
+
     <spring.version>5.1.6.RELEASE</spring.version>
     <spring-boot.version>2.0.0.RELEASE</spring-boot.version>
 
@@ -33,6 +36,20 @@
 
   <dependencies>
 
+    <!-- Hibernate -->
+    <dependency>
+      <groupId>org.hibernate</groupId>
+      <artifactId>hibernate-core</artifactId>
+      <version>${hibernate.core.version}</version>
+    </dependency>
+
+    <dependency>
+      <groupId>mysql</groupId>
+      <artifactId>mysql-connector-java</artifactId>
+      <version>${hibernate.mysql.connector}</version>
+    </dependency>
+
+
     <!-- Spring Boot -->
     <dependency>
       <groupId>org.springframework.boot</groupId>

hibernate/app/src/main/java/es/msanchez/frameworks/java/spring/boot/entity/Hobby.java

@@ -0,0 +1,24 @@
+package es.msanchez.frameworks.java.spring.boot.entity;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+@Entity
+@Table
+@Data
+@NoArgsConstructor
+public class Hobby {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private int id;
+
+    private String name;
+
+}

hibernate/app/src/main/java/es/msanchez/frameworks/java/spring/boot/entity/Person.java

@@ -0,0 +1,26 @@
+package es.msanchez.frameworks.java.spring.boot.entity;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+@Table
+@Entity
+@Data
+@NoArgsConstructor
+public class Person {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private int id;
+
+    private String name;
+
+    private Integer age;
+
+}

hibernate/app/src/main/java/es/msanchez/frameworks/java/spring/boot/hibernate/HibernateUtil.java

@@ -0,0 +1,27 @@
+package es.msanchez.frameworks.java.spring.boot.hibernate;
+
+import lombok.Getter;
+import lombok.extern.slf4j.Slf4j;
+import org.hibernate.SessionFactory;
+import org.hibernate.cfg.Configuration;
+
+@Slf4j
+public class HibernateUtil {
+
+    @Getter
+    private static final SessionFactory SESSION_FACTORY = HibernateUtil.buildSessionFactory();
+
+    private static SessionFactory buildSessionFactory() {
+        try {
+            return new Configuration().configure().buildSessionFactory();
+        } catch(final Throwable ex) {
+            log.error("Failure on ini hibernate session. ", ex);
+            throw new ExceptionInInitializerError(ex);
+        }
+    }
+
+    public static void shutdown() {
+        SESSION_FACTORY.close();
+    }
+
+}

hibernate/app/src/main/resources/hibernate.cfg.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE hibernate-configuration PUBLIC
+        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
+        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
+<hibernate-configuration>
+    <session-factory>
+
+        <property name="connection.url">jdbc:mysql://localhost:3310/hibernate</property>
+        <property name="connection.username">hibernate_user</property>
+        <property name="connection.password">hibernate_pass</property>
+        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
+        <property name="dialect">org.hibernate.dialect.MySQL8Dialect</property>
+
+        <property name="show_sql">true</property>
+        <property name="format_sql">true</property>
+        <property name="hibernate.hbm2ddl.auto">update</property>
+
+        <!-- JDBC connection pool (use the built-in) -->
+        <property name="connection.pool_size">100</property>
+        <property name="current_session_context_class">thread</property>
+
+        <mapping class="es.msanchez.frameworks.java.spring.boot.entity.Person"/>
+        <mapping class="es.msanchez.frameworks.java.spring.boot.entity.Hobby"/>
+
+    </session-factory>
+</hibernate-configuration>

hibernate/app/src/test/java/es/msanchez/frameworks/java/spring/boot/hibernate/HibernateUtilTest.java

@@ -0,0 +1,37 @@
+package es.msanchez.frameworks.java.spring.boot.hibernate;
+
+import es.msanchez.frameworks.java.spring.boot.entity.Hobby;
+import org.hibernate.Session;
+import org.testng.annotations.AfterMethod;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+public class HibernateUtilTest {
+
+    private Session session;
+
+    @BeforeMethod
+    public void setUp() {
+        this.session = HibernateUtil.getSESSION_FACTORY().openSession();
+    }
+
+    @AfterMethod
+    public void tearDown() {
+        HibernateUtil.shutdown();
+    }
+
+    @Test
+    public void testInsert() {
+        // @GIVEN
+        session.beginTransaction();
+
+        final Hobby hobby = new Hobby();
+        hobby.setName("Swimming");
+
+        // @WHEN
+        session.save(hobby);
+        session.getTransaction().commit();
+
+        // @THEN
+    }
+}

hibernate/database/docker-compose.yml

@@ -9,7 +9,7 @@ services:
   #    - ./dbcreation.sql:/tmp/dbcreation.sql
   #    - ./import.sh:/tmp/import.sh
     ports:
-      - "3306:3306"
+      - "3310:3306"
     environment:
       MYSQL_DATABASE: "hibernate"
       MYSQL_USER: "hibernate_user"