7
मुझे हाइबरनेट के साथ एक गंभीर समस्या है। मैं विभिन्न पुस्तकों und ऑनलाइन ट्यूटोरियल पीछा किया, लेकिन मैंने कभी मिल ही अपवाद "ExceptionInInitializerError" स्पष्ट रूप से HibernateUtil.java लाइनहाइबरनेट बिल्ड सत्र फ़ैक्टरी() अपवाद
SessionFactory sf = cfg.configure().buildSessionFactory();
मेरे बिलाव लॉग द्वारा फेंका कहते हैं निम्नलिखित:
Caused by: java.lang.ExceptionInInitializerError
at de.marcelstuht.nerven2.server.HibernateUtil.buildSessionFactory(HibernateUtil.java:23)
at de.marcelstuht.nerven2.server.HibernateUtil.<clinit>(HibernateUtil.java:8)
at de.marcelstuht.nerven2.shared.model.Account.<init>(Account.java:52)
at de.marcelstuht.nerven2.server.GreetingServiceImpl.loginServer(GreetingServiceImpl.java:39)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569)
... 21 more
Caused by: org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister
at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:180)
at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:131)
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:345)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1737)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1775)
at de.marcelstuht.nerven2.server.HibernateUtil.buildSessionFactory(HibernateUtil.java:18)
... 29 more
Caused by: org.hibernate.InstantiationException: could not instantiate test objectde.marcelstuht.nerven2.shared.model.Account
at org.hibernate.engine.internal.UnsavedValueFactory.instantiate(UnsavedValueFactory.java:49)
at org.hibernate.engine.internal.UnsavedValueFactory.getUnsavedIdentifierValue(UnsavedValueFactory.java:68)
at org.hibernate.tuple.PropertyFactory.buildIdentifierProperty(PropertyFactory.java:75)
at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:143)
at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:498)
at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:142)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:158)
... 34 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.hibernate.engine.internal.UnsavedValueFactory.instantiate(UnsavedValueFactory.java:46)
... 44 more
Caused by: java.lang.NullPointerException
at de.marcelstuht.nerven2.shared.model.Account.<init>(Account.java:52)
... 49 more
Account.java
package de.marcelstuht.nerven2.shared.model;
import java.io.Serializable;
import java.util.List;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;
import org.apache.commons.codec.digest.DigestUtils;
import org.hibernate.Session;
import org.hibernate.criterion.*;
import de.marcelstuht.nerven2.server.HibernateUtil;
@Entity
@Table(name = "account")
public class Account implements Serializable {
private static final long serialVersionUID = 2675108132819989138L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id")
Long id;
@NotNull
@Column(name = "username", unique = true)
String username;
@Column(name = "password")
String password;
@Column(name = "email")
String email;
protected Session session;
public Account() {
session = HibernateUtil.getSessionFactory().openSession();
}
public Account(Long id) {
this.id = id;
session = HibernateUtil.getSessionFactory().openSession();
}
public Account(Long id, String username, String password, String email) {
this.id = id;
this.username = username;
this.password = password;
this.email = email;
session = HibernateUtil.getSessionFactory().openSession();
}
public void setId(Long newid) {
id = newid;
}
public Long getId() {
return id;
}
public void setUsername(String user) {
username = user;
}
public String getUsername() {
return username;
}
public void setEmail(String mail) {
email = mail;
}
public String getEmail() {
return email;
}
public void setPassword(String newPass) {
password = newPass;
}
public void setNewPassword(String newPass) {
password = hashPassword(newPass);
}
public boolean checkPassword(String pass) {
pass = hashPassword(pass);
if (password.equals(pass)) return true;
else return false;
}
private String hashPassword(String password) {
return DigestUtils.shaHex("wudu390909dfh"+password);
}
public Account get(Long id) {
session.beginTransaction();
Account result = (Account) session.get("account", id);
session.getTransaction().commit();
return result;
}
public Long saveOrUpdate(Account account) {
if (account == null) {
return null;
}
session.beginTransaction();
session.saveOrUpdate(account);
Long id = (Long) session.getIdentifier(account);
session.getTransaction().commit();
return id;
}
public void delete(Account account) {
if (account == null) {
return;
}
session.beginTransaction();
session.delete(account);
session.getTransaction().commit();
}
public List<Account> getAccountByUsername(String user) {
session.beginTransaction();
@SuppressWarnings("unchecked")
List<Account> result = session
.createCriteria(Account.class)
.add(Restrictions.eq("username", user))
.list();
session.getTransaction().commit();
return result;
}
}
HibernateUtil.java
package de.marcelstuht.nerven2.server;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.jboss.logging.Logger;
public class HibernateUtil {
private static final SessionFactory sessionFactory = buildSessionFactory();
protected HibernateUtil() {
}
private static SessionFactory buildSessionFactory() {
try {
// Create the SessionFactory from hibernate.cfg.xml
Configuration cfg = new Configuration();
SessionFactory sf = cfg.configure().buildSessionFactory();
return sf;
} catch (Exception ex) {
// Make sure you log the exception, as it might be swallowed
Logger.getLogger(HibernateUtil.class).error("Initial SessionFactory creation failed.", ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}
hibernate.cfg.xml
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://127.0.0.1:3306/ba</property>
<property name="connection.username">*myuser*</property>
<property name="connection.password">*mypassword*</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
<!-- Disable the second-level cache -->
<!-- <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>-->
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drop and re-create the database schema on startup -->
<property name="hibernate.bytecode.provider">javassist</property>
<!-- Names the annotated entity class -->
<mapping class="de.marcelstuht.nerven2.shared.model.Account"/>
</session-factory>
मैं दोनों हाइबरनेट 3.6.9 के साथ-साथ 4.0.1 (विभिन्न ग्रहण परियोजनाओं में) की कोशिश की। जार मैं प्रोजेक्ट में जोड़ी का एक स्क्रीनशॉट Skitch पर उपलब्ध है: https://skitch.com/marcelstuht/g7h8h/properties-for-nerven2
बहुत बहुत धन्यवाद। अब यह काम कर रहा है। –
मेरी समस्या एक लोड कन्स्ट्रक्टर नहीं थी, लेकिन वास्तव में यह एक परिपत्र निर्भरता थी। मेरे पास सेसियन फैक्ट्री के लिए एक स्थिर प्रारंभकर्ता था, हालांकि, मेरी इकाइयों में से एक का एक स्थिर मूल्य था जिसके लिए एक क्वेरी सेट की आवश्यकता थी। इसलिए, हाइबरनेट प्रारंभ नहीं हो सका, क्योंकि उस इकाई को इसे प्रारंभ करने की आवश्यकता थी ... (देर हो चुकी है .... उम्मीद है कि समझ में आता है)। –