Я тоже обратила на это внимание, но откуда берутся два сервиса ума не дам.
вот собственно код ELibSession:
| Код |
@Stateless
public class ELibSession implements ELibSessionRemote, ELibSessionLocal {
@PersistenceContext(unitName = "ELib-ejbPU")
private EntityManager em;
Worksession ws=null;
public void persist(Object object) {
em.persist(object);
}
public boolean registration(String login, String password)throws LibraryException {
boolean register=false;
if (!login.equals("")&&!password.equals("")){
Query query = em.createNamedQuery("Reader.findByLogin");
query.setParameter("login", login);
if (query.getResultList().isEmpty()){
Reader reader=new Reader(login,password);
em.persist(reader);
register=true;
}
else
throw new LibraryException("Пользователь с таким логином уже зарегистрирован");
}
else
throw new LibraryException("Поля логина и пароля не могут быть пустыми");
return register;
}
public int authorization(String login, String password) throws LibraryException{
/*Author author1=new Author(0,"John","Vanduk");
Ebook book1=new Ebook(0,"Drupal 6",3,1);
book1.setAuthor(author1);
List<Location> locs=new LinkedList<Location>();
for (int i=0; i<book1.getCount(); i++){
Librarylocation ll=new Librarylocation(i);
ll.setEbook(book1);
locs.add(ll);
em.persist(ll);
book1.getLibrarylocationCollection().add(ll);
}
em.persist(author1);
em.persist(book1);*/
int result=-1;
Query query = em.createNamedQuery("Reader.findByFull");
query.setParameter("login", login);
query.setParameter("password", password);
List<Reader> readers=(List<Reader>)query.getResultList();
if (!readers.isEmpty()){
Reader r=readers.get(0);
ws=new Worksession(r);
em.persist(ws);
result=ws.getId();
}
else
throw new LibraryException("Неверная пара логин-пароль");
return result;
}
private List<Ebook> searchByTitle(String title) {
List<Ebook> result=new LinkedList<Ebook>();
Query query = em.createNamedQuery("Ebook.findByTitle");
query.setParameter("title", title);
result=query.getResultList();
return result;
}
private List<Ebook> searchByAuthor(String firstName, String lastName) {
List<Ebook> result=new LinkedList<Ebook>();
Query query = em.createNamedQuery("Ebook.findAll");
List<Ebook> books=query.getResultList();
for(Ebook book:books){
Author author=book.getAuthor();
if (author.getFirstname().equals(firstName)&&author.getLastname().equals(lastName))
result.add(book);
}
return result;
}
public List<Ebook> search(String title, String firstName, String lastName) {
List<Ebook> result=new LinkedList<Ebook>();
if (!title.equals("")&&firstName.equals("")&&lastName.equals("")){
result=searchByTitle(title);
}
if (title.equals("")&&!firstName.equals("")&&!lastName.equals("")){
result=searchByAuthor(firstName, lastName);
}
if (!title.equals("")&&!firstName.equals("")&&!lastName.equals("")){
List<Ebook> books=searchByTitle(title);
for(Ebook book:books){
Author author=book.getAuthor();
if(author.getFirstname().equals(firstName)&&author.getLastname().equals(lastName))
result.add(book);
}
}
return result;
}
public boolean orderBook(Ebook ebook) throws LibraryException {
boolean result=false;
Reader reader=ws.getReader();
Userlocation ul=null;
//проверяем была ли книга заказана пользователем ранее
Query query=em.createNamedQuery("Userlocation.findAll");
List<Userlocation> ulocs=(List<Userlocation>)query.getResultList();
for(Userlocation uloc:ulocs){
if (uloc.getEbook().equals(ebook)&&uloc.getReader().equals(reader))
ul=uloc;
}
//если проверка выполнена, выполняем заказ
if (ul==null){
Query query1=em.createNamedQuery("Librarylocation.findAll");
List<Librarylocation> liblocs=query1.getResultList();
for(Librarylocation libloc:liblocs){
if (libloc.getEbook().equals(ebook)&&!result){
em.remove(libloc);
Userlocation uloc=new Userlocation(reader, ebook);
em.persist(uloc);
result=true;
}
}
if(!result)
throw new LibraryException("В библиотеке нет свободных экземпляров указанной книги");
}
else{
throw new LibraryException("Эта книга уже была заказана Вами");
}
return result;
}
public boolean returnBook(Ebook ebook) {
boolean result=false;
Reader reader=ws.getReader();
Userlocation ul=null;
//проверяем была ли книга заказана пользователем
Query query=em.createNamedQuery("Userlocation.findAll");
List<Userlocation> ulocs=(List<Userlocation>)query.getResultList();
for(Userlocation uloc:ulocs){
if (uloc.getEbook().equals(ebook)&&uloc.getReader().equals(reader))
ul=uloc;
}
//если книга была заказана, осуществляем возврат
if (ul!=null){
em.remove(ul);
Librarylocation ll=new Librarylocation(ebook);
em.persist(ll);
result=true;
}
return result;
}
public List<Ebook> showBooks() {
Query query=em.createNamedQuery("Ebook.findAll");
List<Ebook> result=(List<Ebook>)query.getResultList();
return result;
}
public List<Ebook> showReaderBook() {
List<Ebook> result=new LinkedList<Ebook>();
Reader r=ws.getReader();
Query query = em.createNamedQuery("Userlocation.findAll");
List<Userlocation> ulocs=(List<Userlocation>)query.getResultList();
for(Userlocation ul:ulocs){
if (ul.getReader().equals(r)){
Query q=em.createNamedQuery("Ebook.findById");
q.setParameter("id", ul.getEbook().getId());
List<Ebook> books=(List<Ebook>)q.getResultList();
if (!books.isEmpty())
result.add(books.get(0));
}
}
return result;
}
public int getWorkSession() {
int result=-1;
if (ws!=null){
result=ws.getId();
}
return result;
}
public List<Location> getEbookLocations(Ebook ebook) {
List<Location> result=new LinkedList<Location>();
/*Collection<Librarylocation> liblocs=ebook.getLibrarylocationCollection();
Collection<Userlocation> userlocs=ebook.getUserlocationCollection();
if (liblocs!=null)
result.addAll(liblocs);
if (userlocs!=null)
result.addAll(userlocs);*/
Query query=em.createNamedQuery("Librarylocation.findAll");
List<Librarylocation> liblocs=(List<Librarylocation>)query.getResultList();
for(Librarylocation libloc: liblocs){
if (libloc.getEbook().equals(ebook)){
result.add(libloc);
}
}
Query query1=em.createNamedQuery("Userlocation.findAll");
List<Userlocation> ulocs=(List<Userlocation>)query1.getResultList();
for(Userlocation uloc: ulocs){
if (uloc.getEbook().equals(ebook)){
result.add(uloc);
}
}
return result;
}
// Add business logic below. (Right-click in editor and choose
// "Insert Code > Add Business Method")
}
|
здесь код интерфейса ELibSessionLocal
| Код |
@Local
public interface ELibSessionLocal {
boolean registration(String login, String password)throws LibraryException;
int authorization(String login, String password)throws LibraryException;
List<Ebook> search(String title, String firstName, String lastName);
boolean orderBook(Ebook ebook) throws LibraryException;
boolean returnBook(Ebook ebook);
List<Ebook> showBooks();
List<Ebook> showReaderBook();
int getWorkSession();
List<Location> getEbookLocations(Ebook ebook);
}
|
а вот код самого сервиса ELibWS:
| Код |
@WebService()
@Stateless()
public class ELibWS {
@EJB
private ELibSessionLocal ejbRef;// Add business logic below. (Right-click in editor and choose
// "Insert Code > Add Web Service Operation")
@WebMethod(operationName = "registration")
public boolean registration(@WebParam(name = "login")
String login, @WebParam(name = "password")
String password){
boolean result=false;
try {
result=ejbRef.registration(login, password);
} catch (LibraryException ex) {
Logger.getLogger(ELibWS.class.getName()).log(Level.SEVERE, null, ex);
}
return result;
}
/**
* Web service operation
*/
@WebMethod(operationName = "authorization")
public int authorization(@WebParam(name = "login")
String login, @WebParam(name = "password")
String password){
int result=0;
try {
//TODO write your implementation code here:
result=ejbRef.authorization(login, password);
} catch (LibraryException ex) {
Logger.getLogger(ELibWS.class.getName()).log(Level.SEVERE, null, ex);
}
return result;
}
/**
* Web service operation
*/
/*@WebMethod(operationName = "search")
public List<Ebook> search(@WebParam(name = "title")
String title, @WebParam(name = "firstName")
String firstName, @WebParam(name = "lastName")
String lastName) {
//TODO write your implementation code here:
return ejbRef.search(title, firstName, lastName);
}*/
}
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