iluwatar#84 Utilize Repository layer from another example

Author: iluwatar

layers/pom.xml

@@ -11,6 +11,22 @@
 	<groupId>com.iluwatar.layers</groupId>
 	<artifactId>layers</artifactId>
 	<dependencies>
+		<dependency>
+			<groupId>org.springframework.data</groupId>
+			<artifactId>spring-data-jpa</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.hibernate</groupId>
+			<artifactId>hibernate-entitymanager</artifactId>
+		</dependency>
+		<dependency>
+	  		<groupId>commons-dbcp</groupId>
+	  		<artifactId>commons-dbcp</artifactId>
+	  	</dependency>		
+		<dependency>
+			<groupId>com.h2database</groupId>
+			<artifactId>h2</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>

layers/src/main/java/com/iluwatar/layers/App.java

@@ -1,8 +1,48 @@
 package com.iluwatar.layers;
 
+import java.util.List;
+
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+
 public class App {
 
 	public static void main(String[] args) {
-		System.out.println("Hello World!");
+		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(
+				"applicationContext.xml");
+		PersonDao dao = context.getBean(PersonDao.class);
+
+		Person peter = new Person("Peter", "Sagan");
+		Person nasta = new Person("Nasta", "Kuzminova");
+
+		// Add new Person records
+		dao.save(peter);
+		dao.save(nasta);
+
+		// Count Person records
+		System.out.println("Count Person records: " + dao.count());
+
+		// Print all records
+		List<Person> persons = (List<Person>) dao.findAll();
+		for (Person person : persons) {
+			System.out.println(person);
+		}
+
+		// Find Person by surname
+		System.out.println("Find by surname 'Sagan': "	+ dao.findBySurname("Sagan"));
+
+		// Update Person
+		nasta.setName("Barbora");
+		nasta.setSurname("Spotakova");
+		dao.save(nasta);
+
+		System.out.println("Find by id 2: " + dao.findOne(2L));
+
+		// Remove record from Person
+		dao.delete(2L);
+
+		// And finally count records
+		System.out.println("Count Person records: " + dao.count());
+
+		context.close();
 	}
 }

layers/src/main/java/com/iluwatar/layers/Person.java

@@ -0,0 +1,58 @@
+package com.iluwatar.layers;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+/**
+ * 
+ * Person entity
+ *
+ */
+@Entity
+public class Person {
+
+	@Id
+	@GeneratedValue
+	private Long id;
+	private String name;
+	private String surname;
+
+	public Person() {
+	}
+
+	public Person(String name, String surname) {
+		this.name = name;
+		this.surname = surname;
+	}
+
+	public Long getId() {
+		return id;
+	}
+
+	public void setId(Long id) {
+		this.id = id;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public String getSurname() {
+		return surname;
+	}
+
+	public void setSurname(String surname) {
+		this.surname = surname;
+	}
+
+	@Override
+	public String toString() {
+		return "Person [id=" + id + ", name=" + name + ", surname=" + surname
+				+ "]";
+	}
+}

layers/src/main/java/com/iluwatar/layers/PersonDao.java

@@ -0,0 +1,17 @@
+package com.iluwatar.layers;
+
+import java.util.List;
+
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.stereotype.Repository;
+
+/**
+ * 
+ * Person repository
+ *
+ */
+@Repository
+public interface PersonDao extends CrudRepository<Person, Long> {
+	
+	public List<Person> findBySurname(String surname);
+}

layers/src/main/resources/META-INF/persistence.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<persistence version="1.0"
+	xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
+
+	<persistence-unit name="jpaData" />
+
+</persistence>

layers/src/main/resources/applicationContext.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
+	xmlns:security="http://www.springframework.org/schema/security"
+	xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:jpa="http://www.springframework.org/schema/data/jpa"
+	xsi:schemaLocation="
+				http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
+				http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.0.xsd">
+
+	<jpa:repositories base-package="com.iluwatar" />
+
+	<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
+		<property name="entityManagerFactory" ref="entityManagerFactory" />
+	</bean>
+
+	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
+		destroy-method="close">
+		<property name="driverClassName" value="org.h2.Driver" />
+		<property name="url" value="jdbc:h2:~/databases/person" />
+		<property name="username" value="sa" />
+		<property name="password" value="sa" />
+	</bean>
+
+	<bean id="entityManagerFactory"
+		class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
+		<property name="dataSource" ref="dataSource" />
+		<property name="packagesToScan" value="com.iluwatar" />
+		<property name="persistenceProvider">
+			<bean class="org.hibernate.ejb.HibernatePersistence" />
+		</property>
+		<property name="jpaProperties">
+			<map>
+				<entry key="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />
+				<entry key="hibernate.hbm2ddl.auto" value="create-drop" />
+			</map>
+		</property>
+	</bean>
+</beans>