public class ContactFormController {
private static DatastoreService ds = EMF.getDs();
private Transaction txn = null;
public void create(ContactForm cf) {
Entity e = Util.contactFormToEntity(cf);
txn = ds.beginTransaction();
ds.put(e);
txn.commit();
}
}
public class EventTemplateController {
private static DatastoreService ds = EMF.getDs();
private static EntityManagerFactory emf = EMF.get();
private Transaction txn = null;
public EntityManager getEntityManager() {
return emf.createEntityManager();
}
public void create(EventTemplate eventTemplate) throws RollbackFailureException, Exception {
EntityManager em = null;
try {
txn = ds.beginTransaction();
em = getEntityManager();
em.persist(eventTemplate);
txn.commit();
} catch (Exception ex) {
try {
txn.rollback();
} catch (Exception re) {
throw new RollbackFailureException(
"An error occurred attempting to roll back the transaction.", re);
}
throw ex;
} finally {
if (em != null) {
em.close();
}
}
}
public void edit(EventTemplate eventTemplate) throws RollbackFailureException, Exception {
create(eventTemplate);
}
public void destroy(Key key) throws RollbackFailureException, Exception {
EntityManager em = null;
try {
txn = ds.beginTransaction();
em = getEntityManager();
EventTemplate eventTemplate;
eventTemplate = em.getReference(EventTemplate.class, key);
em.remove(eventTemplate);
txn.commit();
} catch (Exception ex) {
try {
txn.rollback();
} catch (Exception re) {
throw new RollbackFailureException(
"An error occurred attempting to roll back the transaction.", re);
}
throw ex;
} finally {
if (em != null) {
em.close();
}
}
}
public EventTemplate findEventTemplate(Key key) {
EntityManager em = getEntityManager();
try {
EventTemplate a = em.find(EventTemplate.class, key);
return a;
} finally {
em.close();
}
}
public List<EventTemplate> getAllEventTemplatesKeys() {
Query q = new Query("EventTemplate");
q.addSort("name");
PreparedQuery pq = ds.prepare(q);
List<EventTemplate> temps = new ArrayList<EventTemplate>();
String name = null;
String id = null;
for (Entity result : pq.asIterable()) {
name = (String) result.getProperty("name");
id = result.getKey().getName();
EventTemplate et = new EventTemplate(id);
et.setName(name);
temps.add(et);
et = null;
}
return temps;
}
}
