spring-security/samples/chat-jc/src/main/java/sample/config/DataSourceConfig.java

package sample.config;

import javax.sql.DataSource;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.DependsOn;
import org.springframework.core.io.ClassPathResource;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.Database;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import sample.data.User;

@Configuration
public class DataSourceConfig {

	@Bean
	public DataSource dataSource() {
		EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder();
		return builder.setType(EmbeddedDatabaseType.HSQL).build();
	}

	@Bean
	public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
		HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
		vendorAdapter.setDatabase(Database.HSQL);
		vendorAdapter.setGenerateDdl(true);

		LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
		factory.setJpaVendorAdapter(vendorAdapter);
		factory.setPackagesToScan(User.class.getPackage().getName());
		factory.setDataSource(dataSource());

		return factory;
	}

	@Bean
	@DependsOn("entityManagerFactory")
	public ResourceDatabasePopulator initDatabase(DataSource dataSource) throws Exception {
		ResourceDatabasePopulator populator = new ResourceDatabasePopulator();
		populator.addScript(new ClassPathResource("data.sql"));
		populator.addScript(new ClassPathResource("password-encode.sql"));
		populator.populate(dataSource.getConnection());
		return populator;
	}

	@Bean
	public PlatformTransactionManager transactionManager() {
		JpaTransactionManager txManager = new JpaTransactionManager();
		txManager.setEntityManagerFactory(entityManagerFactory().getObject());
		return txManager;
	}

}