ApplicationConfig.java

/*
 * Copyright 2012 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.carlomicieli.config;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ImportResource;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import com.mchange.v2.c3p0.ComboPooledDataSource;

/**
 * The configuration class.
 * @author Carlo Micieli
 *
 */
@Configuration
@EnableTransactionManagement
@PropertySource("classpath:META-INF/config/app.properties")
@ImportResource("classpath:META-INF/spring.xml")
@ComponentScan(basePackages = "com.github.carlomicieli")
public class ApplicationConfig {

	private @Autowired Environment env;

	public @Bean LocalContainerEntityManagerFactoryBean entityManagerFactoryBean() {
		LocalContainerEntityManagerFactoryBean emFactory = 
				new LocalContainerEntityManagerFactoryBean();
		emFactory.setDataSource(dataSource());
		emFactory.setPackagesToScan("com.github.carlomicieli.entities");
		HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
		vendorAdapter.setGenerateDdl(true);
		vendorAdapter.setShowSql(true);
		vendorAdapter.setDatabasePlatform(env.getProperty("dialect"));
		
		emFactory.setJpaVendorAdapter(vendorAdapter);
		return emFactory;
	}
	
	/**
	 * Return the data source bean.
	 * @return the data source bean.
	 */
	public @Bean DataSource dataSource() {

		ComboPooledDataSource ds = new ComboPooledDataSource();

		try {
			ds.setDriverClass(env.getProperty("connection.driver_class"));
		} catch (Exception e) {
			throw new RuntimeException(e);
		}

		ds.setJdbcUrl(env.getProperty("connection.url"));
		ds.setUser(env.getProperty("connection.username"));
		ds.setPassword(env.getProperty("connection.password"));

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