Second Level Cache in Hibernate

Test.java

package com.deepsingh44.model;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

public class Test {

 public static void main(String[] args) {

  Configuration c = new Configuration();

  c.configure("hibernate.cfg.xml");

  SessionFactory sf = c.buildSessionFactory();

  Session s = sf.openSession();

  Product p = s.get(Product.class, 1);

  System.out.println(p.getName());

  s.close();

  Session s1 = sf.openSession();

  Product p1 = s1.get(Product.class, 1);

  System.out.println(p1.getName());

  s1.close();

 }

}

Product.java

package com.deepsingh44.model;

import javax.persistence.Cacheable;

import javax.persistence.Entity;

import javax.persistence.Id;

import javax.persistence.Table;

import org.hibernate.annotations.Cache;

import org.hibernate.annotations.CacheConcurrencyStrategy;

@Entity

@Table(name="products")

@Cacheable  

@Cache(usage=CacheConcurrencyStrategy.READ_ONLY) 

public class Product {

@Id

private int id;

private String name;

private float price;

public int getId() {

 return id;

}

public void setId(int id) {

 this.id = id;

}

public String getName() {

 return name;

}

public void setName(String name) {

 this.name = name;

}

public float getPrice() {

 return price;

}

public void setPrice(float price) {

 this.price = price;

}

}

hibernate.cfg.xml

<?xml version='1.0' encoding='UTF-8'?>    

<!DOCTYPE hibernate-configuration PUBLIC    

          "-//Hibernate/Hibernate Configuration DTD 5.2.0//EN"    

          "http://hibernate.sourceforge.net/hibernate-configuration-5.2.0.dtd">    

    

<hibernate-configuration>    

    

    <session-factory>    

        <property name="show_sql">true</property>    

        <property name="hbm2ddl.auto">update</property>        

        <property name="connection.url">jdbc:mysql://localhost:3306/test</property>    

        <property name="connection.username">root</property>    

        <property name="connection.password">root</property>    

        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>    

         

         <property name="cache.use_second_level_cache">true</property>   

         <property name="cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</property>  

         <mapping class="com.deepsingh44.model.Product"/>  

    </session-factory>    

</hibernate-configuration> 

pom.xml

<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>SecondLevelCache</groupId>

  <artifactId>SecondLevelCache</artifactId>

  <version>0.0.1-SNAPSHOT</version>

  <build>

    <sourceDirectory>src</sourceDirectory>

    <plugins>

      <plugin>

        <artifactId>maven-compiler-plugin</artifactId>

        <version>3.8.0</version>

        <configuration>

          <release>10</release>

        </configuration>

      </plugin>

    </plugins>

  </build>

  <dependencies>

  <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->

<dependency>

    <groupId>org.hibernate</groupId>

    <artifactId>hibernate-core</artifactId>

    <version>5.4.1.Final</version>

</dependency>

  <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->

<dependency>

    <groupId>mysql</groupId>

    <artifactId>mysql-connector-java</artifactId>

    <version>5.1.6</version>

</dependency>

  <dependency>  

    <groupId>net.sf.ehcache</groupId>  

    <artifactId>ehcache</artifactId>  

    <version>2.10.3</version>  

</dependency>  

      

     

<dependency>  

    <groupId>org.hibernate</groupId>  

    <artifactId>hibernate-ehcache</artifactId>  

    <version>5.4.1.Final</version>  

    </dependency>

  </dependencies>

</project>