com.iluwatar.repository.AppConfig.java Source code

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Here is the source code for com.iluwatar.repository.AppConfig.java

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/**
 * The MIT License
 * Copyright (c) 2014 Ilkka Seppl
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.iluwatar.repository;

import java.sql.SQLException;
import java.util.List;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.commons.dbcp.BasicDataSource;
import org.hibernate.jpa.HibernatePersistenceProvider;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;

/**
 * This is the same example as in {@link App} but with annotations based 
 * configuration for Spring.
 *
 */
@EnableJpaRepositories
public class AppConfig {

    /**
     * Creation of H2 db
     * 
     * @return A new Instance of DataSource
     */
    @Bean(destroyMethod = "close")
    public DataSource dataSource() {
        BasicDataSource basicDataSource = new BasicDataSource();
        basicDataSource.setDriverClassName("org.h2.Driver");
        basicDataSource.setUrl("jdbc:h2:~/databases/person");
        basicDataSource.setUsername("sa");
        basicDataSource.setPassword("sa");
        return (DataSource) basicDataSource;
    }

    /**
     * Factory to create a especific instance of Entity Manager
     */
    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
        LocalContainerEntityManagerFactoryBean entityManager = new LocalContainerEntityManagerFactoryBean();
        entityManager.setDataSource(dataSource());
        entityManager.setPackagesToScan("com.iluwatar");
        entityManager.setPersistenceProvider(new HibernatePersistenceProvider());
        entityManager.setJpaProperties(jpaProperties());

        return entityManager;
    }

    /**
     * Properties for Jpa
     */
    private static Properties jpaProperties() {
        Properties properties = new Properties();
        properties.setProperty("hibernate.dialect", "org.hibernate.dialect.H2Dialect");
        properties.setProperty("hibernate.hbm2ddl.auto", "create-drop");
        return properties;
    }

    /**
     * Get transaction manager
     */
    @Bean
    public JpaTransactionManager transactionManager() throws SQLException {
        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(entityManagerFactory().getObject());
        return transactionManager;
    }

    /**
     * Program entry point
     * 
     * @param args
     *          command line args
     */
    public static void main(String[] args) {

        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class);
        PersonRepository repository = context.getBean(PersonRepository.class);

        Person peter = new Person("Peter", "Sagan", 17);
        Person nasta = new Person("Nasta", "Kuzminova", 25);
        Person john = new Person("John", "lawrence", 35);
        Person terry = new Person("Terry", "Law", 36);

        // Add new Person records
        repository.save(peter);
        repository.save(nasta);
        repository.save(john);
        repository.save(terry);

        // Count Person records
        System.out.println("Count Person records: " + repository.count());

        // Print all records
        List<Person> persons = (List<Person>) repository.findAll();
        for (Person person : persons) {
            System.out.println(person);
        }

        // Update Person
        nasta.setName("Barbora");
        nasta.setSurname("Spotakova");
        repository.save(nasta);

        System.out.println("Find by id 2: " + repository.findOne(2L));

        // Remove record from Person
        repository.delete(2L);

        // count records
        System.out.println("Count Person records: " + repository.count());

        // find by name
        Person p = repository.findOne(new PersonSpecifications.NameEqualSpec("John"));
        System.out.println("Find by John is " + p);

        // find by age
        persons = repository.findAll(new PersonSpecifications.AgeBetweenSpec(20, 40));

        System.out.println("Find Person with age between 20,40: ");
        for (Person person : persons) {
            System.out.println(person);
        }

        context.close();

    }

}