Adding the application context file

Author: mrmodise

src/main/java/modisefileupload/java/config/ApplicationContext.java

@@ -0,0 +1,141 @@
+package modisefileupload.java.config;
+
+import java.util.Properties;
+
+import javax.persistence.EntityManagerFactory;
+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.core.env.Environment;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+import org.springframework.jdbc.datasource.DriverManagerDataSource;
+import org.springframework.jdbc.datasource.init.DatabasePopulator;
+import org.springframework.jdbc.datasource.init.DatabasePopulatorUtils;
+import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator;
+import org.springframework.orm.jpa.JpaTransactionManager;
+import org.springframework.orm.jpa.JpaVendorAdapter;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.orm.jpa.vendor.Database;
+import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+import org.springframework.web.multipart.MultipartResolver;
+import org.springframework.web.multipart.commons.CommonsMultipartResolver;
+
+import modisefileupload.java.service.UserService;
+import modisefileupload.java.service.impl.UserServiceImpl;
+
+@EnableJpaRepositories(basePackages={"modisefileupload.java.dao"})
+@EnableTransactionManagement
+@Configuration
+public class ApplicationContext {
+	
+	@Autowired
+	private Environment environment;
+	
+	
+	
+	/**
+	 * setting up the required Beans
+	 */
+	
+	@Bean
+	public UserService userService(){
+		return new UserServiceImpl();
+	}
+	
+	@Bean
+	public DataSource dataSource(){
+		DriverManagerDataSource dataSource = new DriverManagerDataSource();
+		dataSource.setDriverClassName(environment.getProperty("jdbc.driverClass"));
+		dataSource.setUrl(environment.getProperty("jdbc.url"));
+		dataSource.setUsername(environment.getProperty("jdbc.username"));
+		dataSource.setPassword(environment.getProperty("jdbc.password"));
+		
+		return dataSource;
+	}
+	
+	public DatabasePopulator databasePopulator(){
+		ResourceDatabasePopulator databasePopulator = new ResourceDatabasePopulator();
+		databasePopulator.setContinueOnError(true);
+		databasePopulator.addScript(new ClassPathResource("test-data.sql"));
+		return databasePopulator;
+	}
+	
+	/**
+	 * we need the entity manager for handling Spring transactions
+	 * @param entityManagerFactory
+	 * @return
+	 */
+	@Bean
+	public JpaTransactionManager transactionManager(EntityManagerFactory entityManagerFactory){
+		
+		JpaTransactionManager jpaTransactionManager = new JpaTransactionManager();
+		
+		jpaTransactionManager.setEntityManagerFactory(entityManagerFactory);
+		
+		DatabasePopulatorUtils.execute(databasePopulator(), dataSource());
+		
+		return jpaTransactionManager;	
+	}
+	
+	/**
+	 * We need the multipartResolver for uploading images
+	 * @return
+	 */
+	@Bean
+	public MultipartResolver multipartResolver(){
+		CommonsMultipartResolver resolver = new CommonsMultipartResolver();
+		resolver.setDefaultEncoding("utf-8");
+		resolver.setMaxUploadSize(1024000);
+		return resolver;
+	}
+	
+	/**
+	 * Specifying the JpaVendorAdapter implementation for the desired JPA provider.
+	 * This will initialize appropriate defaults for the given provider, 
+	 * such as persistence provider class and JpaDialect, unless locally overridden in this FactoryBean.
+	 * @return
+	 */
+	@Bean
+	public JpaVendorAdapter jpaVendorAdapter(){
+		HibernateJpaVendorAdapter hibernateJpaVendorAdapter = new HibernateJpaVendorAdapter();
+		
+		hibernateJpaVendorAdapter.setDatabase(Database.MYSQL);
+		
+		hibernateJpaVendorAdapter.setShowSql(true);
+		
+		return hibernateJpaVendorAdapter;
+	}
+	/**
+	 * 
+	 * @return
+	 */
+	@Bean
+	public LocalContainerEntityManagerFactoryBean entityManagerFactory(){
+		
+		LocalContainerEntityManagerFactoryBean entityManagerFactory = new LocalContainerEntityManagerFactoryBean();
+		
+		entityManagerFactory.setDataSource(dataSource());
+		
+		entityManagerFactory.setJpaVendorAdapter(jpaVendorAdapter());
+		
+		
+		entityManagerFactory.setPackagesToScan("modisefileupload.java.domain");
+		
+		Properties jpaProperties = new Properties();
+		
+		jpaProperties.setProperty("hibernate.hbm2ddl.auto", "create-drop");
+		
+		entityManagerFactory.setJpaProperties(jpaProperties);
+		
+		return entityManagerFactory;
+	}
+	
+	/**
+	 * end of setting up MySQL
+	 */
+
+}