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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 customer;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;
import javax.persistence.Query;
import org.osoa.sca.annotations.Destroy;
import org.osoa.sca.annotations.Init;
public class CustomerServiceImpl implements CustomerService {
EntityManagerFactory emf = null;
EntityManager em = null;
public CustomerServiceImpl() {
}
@Init
public void init() {
System.out.println(">>> Initializing JPA");
try {
emf = Persistence.createEntityManagerFactory("customer-openJPA");
em = emf.createEntityManager();
} catch (Exception e) {
e.printStackTrace();
}
}
@Destroy
public void destroy() {
emf.close();
}
public Customer[] get() {
EntityTransaction tx = em.getTransaction();
List<Customer> customers = new ArrayList<Customer>();
try {
tx.begin();
Query q = em.createQuery("SELECT c FROM customer c");
List results = q.getResultList();
Iterator iter = results.iterator();
while (iter.hasNext()) {
Customer customer = (Customer)iter.next();
customers.add(customer);
}
tx.commit();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (tx.isActive()) {
tx.rollback();
}
em.close();
}
Customer[] customerArray = new Customer[customers.size()];
customers.toArray(customerArray);
return customerArray;
}
public Customer findCustomerByName(String name) {
EntityTransaction tx = em.getTransaction();
Customer customer = null;
try {
tx.begin();
Query q = em.createQuery("SELECT c FROM customer c WHERE c.name = '" + name + "'");
List results = q.getResultList();
Iterator iter = results.iterator();
while (iter.hasNext()) {
customer = (Customer)iter.next();
}
tx.commit();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (tx.isActive()) {
tx.rollback();
}
em.close();
}
return customer;
}
}
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