package org.baeldung.spring;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import com.google.common.base.Preconditions;

/**
 * Spring Database Configuration.
 */
@Configuration
@EnableTransactionManagement
@PropertySource({ "classpath:persistence-h2.properties" })
public class PersistenceConfig {

    @Autowired
    private Environment env;

    //

    @Bean
    public DataSource dataSource() {
        final DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName(Preconditions.checkNotNull(env.getProperty("jdbc.driverClassName")));
        dataSource.setUrl(Preconditions.checkNotNull(env.getProperty("jdbc.url")));
        dataSource.setUsername(Preconditions.checkNotNull(env.getProperty("jdbc.user")));
        dataSource.setPassword(Preconditions.checkNotNull(env.getProperty("jdbc.pass")));
        return dataSource;
    }

}