HIBERNATE&JPA. JPA HIBERNATE CONFIGURATION

! Hibernate&JPA Basic Comfiguration of JPA Hibernate.txt

См. сводную информацию в https://gist.github.com/thergbway/0a68550a27668ce571e7c72cf6e6078f

Car.java

package intro;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.hibernate.annotations.GenericGenerator;

import javax.persistence.*;
import java.util.Date;

@Data
@NoArgsConstructor
@AllArgsConstructor

@Entity
@Table(name = "CARS")
public class Car {
    @Id
    @GeneratedValue(generator = "increment")
    @GenericGenerator(name = "increment", strategy = "increment")
    private Long id;

    private String title;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "CAR_DATE")
    private Date date;
}

log4j.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
    <appender name="stdout" class="org.apache.log4j.ConsoleAppender">
        <param name="Target" value="System.out"/>
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d{ABSOLUTE} %5p %c{1}:%L - %m%n"/>
        </layout>
    </appender>

    <!--Turn on your favourite loggers-->
    <logger name="org.hibernate">
        <level value="INFO"/><!--or DEBUG for more verbose logging-->
    </logger>
    <logger name="org.hibernate.SQL">
        <level value="INFO"/>
    </logger>

    <root>
        <level value="WARN"/>
        <appender-ref ref="stdout"/>
    </root>
</log4j:configuration>

Main.java

package intro;


import org.apache.log4j.Logger;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;
import java.util.Date;
import java.util.Objects;

public class Main {
    private static final Logger log = Logger.getLogger(Main.class);

    public static void main(String[] args) {
        EntityManagerFactory entityManagerFactory = null;
        EntityManager entityManager = null;
        EntityTransaction tx = null;

        try {
            entityManagerFactory = Persistence.createEntityManagerFactory("hibernate-jpa-persistence-unit");
            entityManager = entityManagerFactory.createEntityManager();

            tx = entityManager.getTransaction();
            tx.begin();

            entityManager.persist(new Car(null, "Our very first event!", new Date()));
            entityManager.persist(new Car(null, "A follow up event", new Date()));

            tx.commit();
            entityManager.close();

            entityManager = entityManagerFactory.createEntityManager();
            tx = entityManager.getTransaction();
            tx.begin();

            entityManager.createQuery("from Car", Car.class).getResultList().forEach(System.out::println);

            tx.commit();
        } catch (Exception e) {
            log.error("Got error!", e);
            if (Objects.nonNull(tx) && tx.isActive())
                tx.rollback();
        } finally {
            if (Objects.nonNull(entityManager))
                entityManager.close();
            if (Objects.nonNull(entityManagerFactory))
                entityManagerFactory.close();
        }
    }
}

META-INF\persistence.xml

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
             http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
             version="2.0">

    <persistence-unit name="hibernate-jpa-persistence-unit">
        <description>Persistence unit for the Hibernate JPA</description>

        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>

        <class>intro.Car</class>
        <properties>
            <property name="javax.persistence.jdbc.driver" value="org.h2.Driver"/>
            <property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:db1;DB_CLOSE_DELAY=-1;MVCC=TRUE"/>
            <property name="javax.persistence.jdbc.user" value="sa"/>
            <property name="javax.persistence.jdbc.password" value=""/>

            <property name="hibernate.show_sql" value="true"/>
            <property name="hibernate.hbm2ddl.auto" value="create"/>
        </properties>
    </persistence-unit>

</persistence>

pom.xml

<?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>org.thergbway</groupId>
    <artifactId>hibernate_jpa_examples</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.4.192</version>
        </dependency>
        <dependency>
            <groupId>postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>9.1-901-1.jdbc4</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.21</version>
        </dependency>
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>
        <dependency>
            <groupId>org.javassist</groupId>
            <artifactId>javassist</artifactId>
            <version>3.20.0-GA</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>5.2.3.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-ehcache</artifactId>
            <version>5.2.3.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>5.2.4.Final</version>
        </dependency>
        <dependency>
            <groupId>net.sf.ehcache</groupId>
            <artifactId>ehcache-core</artifactId>
            <version>2.6.11</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.10</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-clean-plugin</artifactId>
                <version>3.0.0</version>
                <executions>
                    <execution>
                        <id>auto-clean</id>
                        <phase>initialize</phase>
                        <goals>
                            <goal>clean</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>${maven.compiler.source}</source>
                    <target>${maven.compiler.target}</target>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>