Annotation Config was added. Now AppConfig contains a Main Method (same logic in App.java) to execute

2015-11-27 21:23:55 -06:00
parent 9d4fff6029
commit 9a85dfe9df
3 changed files with 295 additions and 0 deletions
--- a/repository/src/main/java/com/iluwatar/repository/AppConfig.java
+++ b/repository/src/main/java/com/iluwatar/repository/AppConfig.java
@@ -0,0 +1,131 @@
+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;
+
+/**
+ * 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
+	 * @return
+	 */
+	@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
+	 * @return
+	 */
+	private Properties jpaProperties() {
+		Properties properties = new Properties();
+		properties.setProperty("hibernate.dialect", "org.hibernate.dialect.H2Dialect");
+		properties.setProperty("hibernate.hbm2ddl.auto", "create-drop");
+		return properties;
+	}
+	
+    @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();
+
+	  }
+
+}