org.hibernate.hql.ast.QuerySyntaxException

org.hibernate.hql.ast.QuerySyntaxException - java

org.hibernate.hql.ast.QuerySyntaxException:
users is not mapped [SELECT email, id
FROM users WHERE email='dsdd#dds.com'
AND password='asasas']
public ILogin authenticate(Login login) {
System.out.println(login);
System.out.println(login.getEmail());
String query = "SELECT email, id FROM users WHERE email='"
+ login.getEmail() + "' AND password='" + login.getPassword() + "'";
results = getHibernateTemplate().find(query);
System.out.println(results);
return null;
}
I have a Login Bean class... here it follows.
package
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
public class Login {
public Login(){}
private Long id = null;
private String email;
private String password;
public Login(String email, String password)
{
this.email = email;
this.password = password;
}
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
My application-context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" default-autowire="byName"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<!-- Turn on AspectJ #Configurable support -->
<context:spring-configured />
<context:property-placeholder location="classpath*:*.properties" />
<context:component-scan base-package="com.intermedix"/>
<context:annotation-config/>
<!-- Turn on #Autowired, #PostConstruct etc support -->
<bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />
<bean class="org.springframework.context.annotation.CommonAnnotationBeanPostProcessor" />
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="myDataSource" />
<property name="annotatedClasses">
<list>
<value>com.intermedix.domain.Login</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">create</prop>
</props>
</property>
</bean>
<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://127.0.0.1:3306/spring"/>
<property name="username" value="monty"/>
<property name="password" value="indian"/>
</bean>
<tx:annotation-driven transaction-manager="txManager"/>
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
</beans>

Even if it does not belong to your question:
Don't use Hibernate/JPA in this way (String concatination) !:
String query = "SELECT email, id FROM users AS u WHERE email='"+ login.getEmail() + "' AND password='" + login.getPassword() + "'";
Instead use HQL like prepared statements:
createQuery(
"SELECT l FROM login WHERE l.email=:email AND l.password=:password")
.setParameter("login",login.getEmail())
.setParameter("password",login.getPassword());
If you do it in "your style" you will have lot of fun with SQL Injections!
Next: read the hibernate reference about HQL, for me it looks like you are writing SQL instead of HQL.

SELECT email, id FROM users
What is "users"? There is nothing in your config or code called "users", so Hibernate has no idea what you're talking about.
Secondly, your Login class is not annotated with #Entity, so Hibernate is likely ignoring it.
So add the annotation, and most likely change your query to:
SELECT email, id FROM Login

Looks obvious to me : "users is not mapped..."
Either you didn't map the Users table, or you have it incorrectly configured.

#Entity
#Table(name="users")
public class Login {
You actually need to annotate Login class since you say (<property name="annotatedClasses">) that in application-context.xml for example like this.
#Column(name="password")
public String getPassword() {
return password;
}

List list = getHibernateTemplate().find("from Form3A where FAC_ID=?",FAC_ID);
HERE Form3A is name of class and config file is
<property name="annotatedClasses">
<list>
<value>org.fbis.models.Form3A</value>
</list>
</property>

Related

Accessing Database in Multithreaded Environment in Java

I am trying to understand approaches to access a database in a Multi threaded environment.
I implemented a following spring example that queries object from database in multiple threads, it works fine but I am not to sure if this is the right way to do it.
database.xml file looks like this
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/jdbc
http://www.springframework.org/schema/jdbc/spring-jdbc.xsd">
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<property name="url" value="jdbc:oracle:thin:#localhost:1522/orcl.168.0.106" />
<property name="username" value="system" />
<property name="password" value="admin" />
</bean>
<bean id="oracleJDBCTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name = "dataSource" ref = "dataSource" />
</bean>
</beans>
UserDetails object
package com.dataReader;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.springframework.jdbc.core.RowMapper;
public class UserDetails implements RowMapper {
private String user_name;
private String password;
public String getUser_name() {
return user_name;
}
public void setUser_name(String username) {
this.user_name = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
UserDetails userDetails = new UserDetails();
userDetails.setUser_name(rs.getString("USER_NAME"));
userDetails.setPassword(rs.getString("PASSWORD"));
return userDetails;
}
}
Application class is as follows
package com.dataReader;
import java.util.ArrayList;
import java.util.List;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
public class Application {
static JdbcTemplate oracleJDBCTemplate;
public static void main(String[] args) {
ApplicationContext context =
new ClassPathXmlApplicationContext("database.xml");
oracleJDBCTemplate = (JdbcTemplate) context.getBean("oracleJDBCTemplate");
List<String> userList = new ArrayList<String>();
userList.add("system");
userList.add("user-1");
userList.add("user-2");
userList.add("user-10");
userList.add("user-12");
for(int i=0;i<userList.size();i++) {
RunnerData runnerData = new RunnerData(oracleJDBCTemplate,userList.get(i));
Thread thread = new Thread(runnerData);
thread.start();
}
}
}
class RunnerData implements Runnable{
private JdbcTemplate oracleJDBCTemplate;
private String username;
RunnerData(JdbcTemplate jdbcTemplate,String username){
this.oracleJDBCTemplate=jdbcTemplate;
this.username=username;
}
#Override
public void run() {
UserDetails userDetails= oracleJDBCTemplate.queryForObject("select user_name,password from User_details where user_name=?",
new Object[] {username},BeanPropertyRowMapper.newInstance(UserDetails.class));
System.out.println(userDetails.getUser_name()+" "+userDetails.getPassword());
}
}
Is that a right approach to access database in a multi-threaded environment especially where we have large number of threads accessing database?
Wouldn't JdbcTemplate lock the database while querying the object. What are your experience in designing & implementing such a scenario?
Thanks for your input on this.

You would use database connection pooling.
Using Oracle connection pooling from OJDBC library is one way, for example:
<bean id="datasource" class="oracle.jdbc.pool.OracleDataSource" destroy-method="close">
<property name="connectionCachingEnabled" value="true" />
<property name="url" value="jdbc:oracle:thin:#localhost:1522/orcl.168.0.106" />
<property name="username" value="system" />
<property name="password" value="admin" />
<property name="connectionCacheProperties">
<props merge="default">
<prop key="MinLimit>5</prop>
<prop key="MaxLimit">100</prop>
</props>
</property>
</bean>

Exception:No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here

I am getting error after deploying the application. I have checked similar questions but still could not resolve the error. I have used #Transactional for the service class as well as
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.hibernate.HibernateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:656)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
Root Cause
org.hibernate.HibernateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here
org.springframework.orm.hibernate3.SpringSessionContext.currentSession(SpringSessionContext.java:63)
org.hibernate.impl.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:687)
com.utd.dao.CustomerDaoImpl.getAllCustomer(CustomerDaoImpl.java:22)
com.utd.service.CustomerManagerImpl.getAllCustomer(CustomerManagerImpl.java:23)
com.utd.controller.CustomerController.listCustomers(CustomerController.java:22)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
I have following project files:
The controller:
#Controller
public class CustomerController {
#Autowired
private CustomerManager customerManager;
#RequestMapping(value="/", method= RequestMethod.GET)
public String listCustomers(ModelMap map){
map.addAttribute("customer", new Customer());
map.addAttribute("customerList", customerManager.getAllCustomer());
return "CustomerList";
}
#RequestMapping(value = "/add", method = RequestMethod.POST)
public String addCustomer(#ModelAttribute(value="customer") Customer customer, BindingResult result)
{
customerManager.addCustomer(customer);
return "redirect:/";
}
#RequestMapping("/delete/{customerId}")
public String deleteEmplyee(#PathVariable("customerId") Integer customerId)
{
customerManager.deleteCustomer(customerId);
return "redirect:/";
}
public void setCustomerManager(CustomerManager customerManager) {
this.customerManager = customerManager;
}
}
The dao class
public class CustomerDaoImpl implements CustomerDao{
#Autowired
private SessionFactory sessionFactory;
public void addCustomer(Customer customer) {
this.sessionFactory.getCurrentSession().save(customer);
}
#SuppressWarnings("unchecked")
public List<Customer> getAllCustomer() {
return this.sessionFactory.getCurrentSession().createQuery("from Customer").list();
}
public void deleteCustomer(Integer customerId) {
Customer customer = (Customer) sessionFactory.getCurrentSession().load(Customer.class, customerId);
if (null != customer) {
this.sessionFactory.getCurrentSession().delete(customer);
}
}
}
The Dto:
#Entity
#Table(name="Customer")
public class Customer {
#Id
#Column(name="ID")
#GeneratedValue
private int id;
#Column(name="NAME")
private String name;
#Column(name="CONTACT")
private String contact;
#Column(name="EMAIL")
private String email;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getContact() {
return contact;
}
public void setContact(String contact) {
this.contact = contact;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
customer-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
http://www.springframework.org/schema/util/ http://www.springframework.org/schema/util/spring-util.xsd">
<context:annotation-config />
<context:component-scan base-package="com.utd.controller" />
<bean id="jspViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/WEB-INF/view/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<bean id="messageSource"
class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="basename" value="classpath:messages"></property>
<property name="defaultEncoding" value="UTF-8"></property>
</bean>
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
p:location="/WEB-INF/jdbc.properties"></bean>
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"
p:driverClassName="${jdbc.driverClassName}"
p:url="${jdbc.databaseurl}" p:username="${jdbc.username}"
p:password="${jdbc.password}"></bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="configLocation">
<value>classpath:hibernate.cfg.xml</value>
</property>
<property name="configurationClass">
<value>org.hibernate.cfg.AnnotationConfiguration</value>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${jdbc.dialect}</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<bean id="customerDao" class="com.utd.dao.CustomerDaoImpl"></bean>
<bean id="customerManager" class="com.utd.service.CustomerManagerImpl"></bean>
<tx:annotation-driven />
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
</beans>
dispatcher-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<mvc:annotation-driven />
<context:component-scan base-package="com.utd" />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
Manager class Implementation
package com.utd.service;
import com.utd.dao.CustomerDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.utd.dto.Customer;
import javax.transaction.Transactional;
import java.util.List;
#Service
public class CustomerManagerImpl implements CustomerManager {
#Autowired
private CustomerDao customerDao;
#Transactional
public void addCustomer(Customer customer) {
customerDao.addCustomer(customer);
}
#Transactional
public List<Customer> getAllCustomer() {
return customerDao.getAllCustomer();
}
#Transactional
public void deleteCustomer(Integer customerId) {
customerDao.deleteCustomer(customerId);
}
public void setCustomerDao(CustomerDao customerDao) {
this.customerDao = customerDao;
}
}
I would like to know how to resolve the error.

Why "org.hibernate.hql.internal.ast.QuerySyntaxException: customer is not mapped [from customer]" error is coming

i am facing below error:
Type Exception Report
Message Request processing failed; nested exception is java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: customer is not mapped [from customer]
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: customer is not mapped [from customer]
Entity Class:
package com.luv2code.springdemo.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
//#Table(schema = "web_customer_tracker", name = "customer")
#Table(name="customer")
#Entity
public class Customer {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
#Column(name="id")
private int id;
#Column(name="first_name")
private String firstName;
#Column(name="last_name")
private String lastName;
#Column(name="email")
private String email;
public Customer() {
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
#Override
public String toString() {
return "Customer [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", email=" + email + "]";
}
}
DAO impl:
package com.luv2code.springdemo.dao;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.query.Query;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import com.luv2code.springdemo.entity.Customer;
#Repository
public class CustomerDAOImpl implements CustomerDAO {
#Autowired
private SessionFactory sessionFactory;
#Override
#Transactional
public List<Customer> getCustomers() {
//get the current hibernate session
Session currentSession = sessionFactory.getCurrentSession();
//List customers = new ArrayList<Customer>();
//create a query
Query<Customer> theQuery=currentSession.createQuery("from customer", Customer.class);
//currentSession.createQuery("from Customer", Customer.class);
//execute query and get result list
List<Customer> customers=theQuery.getResultList();
// return the results
/* Customer cus1=new Customer();
cus1.setEmail("a#gmail.com");
cus1.setFirstName("Abhishek");
cus1.setId(10);
cus1.setLastName("Kumar");
customers.add(cus1); */
return customers;
}
}
XML:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- Add support for component scanning -->
<context:component-scan base-package="com.luv2code.springdemo" />
<!-- Add support for conversion, formatting and validation support -->
<mvc:annotation-driven/>
<!-- Define Spring MVC view resolver -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/view/" />
<property name="suffix" value=".jsp" />
</bean>
<!-- Step 1: Define Database DataSource / connection pool -->
<bean id="myDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="driverClass" value="com.mysql.cj.jdbc.Driver" />
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/web_customer_tracker?useSSL=false&serverTimezone=UTC" />
<property name="user" value="springstudent" />
<property name="password" value="springstudent" />
<!-- these are connection pool properties for C3P0 -->
<property name="minPoolSize" value="5" />
<property name="maxPoolSize" value="20" />
<property name="maxIdleTime" value="30000" />
</bean>
<!-- Step 2: Setup Hibernate session factory -->
<bean id="sessionFactory"
class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<property name="dataSource" ref="myDataSource" />
<property name="packagesToScan" value="com.luv2code.springdemo.entity" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<!-- Step 3: Setup Hibernate transaction manager -->
<bean id="myTransactionManager"
class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<!-- Step 4: Enable configuration of transactional behavior based on annotations -->
<tx:annotation-driven transaction-manager="myTransactionManager" />
</beans>

There is a difference between the entity Customer and the relational table customer.
When you specify #Table(name="customer"), you ask your JPA implementation to use customer as table name which it is probably doing (check in your database).
When you specify createQuery("from customer", Customer.class), you ask your JPA implementation to create a JPQL query and customer is not a known entity because that's Customer or com.luv2code.springdemo.entity.Customer the entity.

java persistence works with reading from database,fails to insert / update

hi guys i m new to Hibernate and JPA.
This is my VO class.
Product.java
package com.sample.myproduct.valueobject;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
import com.sample.myproduct.constants.MyproductConstants;
#Entity
#Table(name = "product")
#NamedQuery(
name=MyproductConstants.PRODUCT_NAMED_QUERY,
query=MyproductConstants.SELECT_QUERY_PRODUCT
)
public class Product {
#Id
#Column(name="Product_id")
int productId;
#Column(name="Name")
String name;
#Column(name="Desc")
String desc;
#Column(name="Rating")
int rating;
#Column(name="stock")
int stock;
public int getProductId() {
return productId;
}
public void setProductId(int productId) {
this.productId = productId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
public int getRating() {
return rating;
}
public void setRating(int rating) {
this.rating = rating;
}
public int getStock() {
return stock;
}
public void setStock(int stock) {
this.stock = stock;
}
}
Impl Class
package com.sample.myproduct.servicedao;
import java.util.List;
import java.util.Random;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.springframework.dao.DataAccessException;
import org.springframework.transaction.annotation.Transactional;
import com.sample.myproduct.constants.MyproductConstants;
import com.sample.myproduct.valueobject.Product;
#Transactional
public class ProductDAOImpl implements ProductDAO {
#PersistenceContext
private EntityManager entityManagerFactory;
public EntityManager getEntityManagerFactory() {
return entityManagerFactory;
}
public void setEntityManagerFactory(EntityManager entityManagerFactory) {
this.entityManagerFactory = entityManagerFactory;
}
public void save(Product product){
entityManagerFactory.persist(product);
}
public Product getProductById(int id) throws DataAccessException{
return entityManagerFactory.find(Product.class,id);
}
}
}
persistance.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence 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"
version="1.0">
<persistence-unit name="JpaPersistenceUnit"
transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.sample.myproduct.servicedao.ProductDAOImpl</class>
</persistence-unit>
</persistence>
servlet-context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">
<!-- DispatcherServlet Context: defines this servlet's request-processing
infrastructure -->
<!-- Enables the Spring MVC #Controller programming model -->
<annotation-driven />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving
up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Resolves views selected for rendering by #Controllers to .jsp resources
in the /WEB-INF/views directory -->
<beans:bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<context:component-scan base-package="com.sample.myproduct" />
<beans:bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close" p:driverClassName="com.mysql.jdbc.Driver"
p:url="jdbc:mysql://localhost/testdb" p:username="root" p:password="" />
<beans:bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<beans:property name="dataSource" ref="dataSource" />
<beans:property name="packagesToScan" value="com.sample.myproduct" />
<beans:property name="jpaVendorAdapter">
<beans:bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</beans:property>
<beans:property name="jpaProperties">
<beans:props>
<beans:prop key="hibernate.hbm2ddl.auto">update</beans:prop>
<beans:prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</beans:prop>
<beans:prop key="hibernate.show_sql">true</beans:prop>
</beans:props>
</beans:property>
<beans:property name="persistenceUnitName" value="entityManager" />
</beans:bean>
<beans:bean class="org.springframework.orm.jpa.JpaTransactionManager"
id="transactionManager">
<beans:property name="entityManagerFactory" ref="entityManagerFactory" />
</beans:bean>
<tx:annotation-driven mode="aspectj"
transaction-manager="transactionManager" />
<context:spring-configured />
<context:annotation-config />
<beans:bean id="productService"
class="com.sample.myproduct.servicebo.ProductService">
</beans:bean>
<beans:bean id="productDAO" class="com.sample.myproduct.servicedao.ProductDAOImpl"></beans:bean>
</beans:beans>
I am able to read data from db but not able to insert data..its not giving any exception.when i added entityManager.flush() after persist function;.
its giving exception as no transaction is in progress
I am not able to find solution for this..

When using JpaTransactionManager, you should specify the dialect as well as below.
<bean id="jpaDialect" class="org.springframework.orm.jpa.vendor.HibernateJpaDialect"/>
<bean id="transactionManager"
class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
<property name="jpaDialect" ref="jpaDialect"/>
</bean>
Update:
No transaction is required to read data from database but active transaction is required to write data to database.
If you don't configure the transactionManager correctly, #Transaction annotation will be ignored silently and all your operation will run as if no transaction is available; therefore, your write operation will fail.

Hibernate doesn't update record in MySQL database

I am using PrimeFaces 3.5, JSF 2.2, Hibernate 4.1, Spring 3.2.3, MySQL in my application.
Function updateUser() is supposed to update record in the database for the selected user from the PrimeFaces dataTable component(values are correct) but for some unknown reason it doesn't. I have a class named AbstractDAO which implements CRUD operations via generics. Insertion, selection and deleting works perfectly, but update fails without showing any errors at all. Any clues what can be wrong in my code?
applicationContext.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:sec="http://www.springframework.org/schema/security"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.1.xsd">
<!-- GLOABL SETTINGS -->
<context:component-scan base-package="com.infostroy.adminportal"/>
<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/>
<!-- DATA SOURCE AND PERSISTENCE SETTINGS -->
<bean id="propertiesPlaceholderConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:db.properties</value>
</list>
</property>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dmDataSource"/>
<property name="packagesToScan" value="com.infostroy.adminportal"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${db.dialect}</prop>
<prop key="hibernate.show_sql">${db.show_sql}</prop>
<prop key="hibernate.hbm2ddl.auto">${db.hbm2ddl_auto}</prop>
<prop key="connection.pool_size">${db.pool_size}</prop>
<prop key="current_session_context_class">${db.current_session_context_class}</prop>
<prop key="org.hibernate.FlushMode">${db.flush_mode}</prop>
</props>
</property>
</bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="dataSource" ref="dmDataSource" />
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="dmDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${db.driver}" />
<property name="url" value="${db.url}" />
<property name="username" value="${db.username}" />
<property name="password" value="${db.password}" />
<property name="maxWait" value="5000" />
<property name="initialSize" value="2" />
<property name="maxActive" value="100"/>
<property name="maxIdle" value="50"/>
<property name="minIdle" value="0"/>
</bean>
</beans>
db.properties:
db.username=root
db.password=root
db.driver=com.mysql.jdbc.Driver
db.url=jdbc:mysql://localhost/adminportal
db.pool_size=0
db.dialect=org.hibernate.dialect.MySQLDialect
db.hbm2ddl_auto=validate
db.show_sql=true
db.current_session_context_class=thread
db.flush_mode=COMMIT
AbstractDAO:
public abstract class AbstractDAO<T extends Serializable> implements Serializable {
#Autowired
protected SessionFactory sessionFactory;
protected T object;
protected Class clazz;
public AbstractDAO(Class clazz) {
this.clazz = clazz;
}
//Executes before being removed from container
#PreDestroy
protected void destroy() {
sessionFactory.getCurrentSession().close();
}
public Session getHiberSession() {
return sessionFactory.openSession();
}
#Transactional
protected T getByID(int id) {
String queryString = "from " + clazz.getSimpleName() + " where id = :id";
Query query = getHiberSession().createQuery(queryString);
query.setInteger("id", id);
object = (T) query.uniqueResult();
return object;
}
#Transactional
protected int deleteByID(int id) {
String queryString = "delete " + clazz.getSimpleName() + " where id = :id";
Query query = getHiberSession().createQuery(queryString);
query.setInteger("id", id);
return query.executeUpdate();
}
#Transactional
protected boolean insert(T object) {
try {
getHiberSession().save(object);
return true;
} catch (HibernateException ex) {
return false;
}
}
#Transactional
protected boolean update(T object) {
try {
getHiberSession().saveOrUpdate(object);
return true;
} catch (HibernateException ex) {
return false;
}
}
#Transactional
protected List getAllRecords() {
String queryString = "from " + clazz.getSimpleName();
Query query = getHiberSession().createQuery(queryString);
return query.list();
}
}
UserDAO.java:
#Repository
public class UserDAO extends AbstractDAO<User> {
public UserDAO() {
super(User.class);
}
public User getUserById(int id) {
return super.getByID(id);
}
public int deleteUserById(int id) {
return super.deleteByID(id);
}
public boolean insertUser(User user) {
return super.insert(user);
}
public boolean updateUser(User user) {
return super.update(user);
}
public List<User> getAllUsers() {
return super.getAllRecords();
}
}
If you need any additional info or code - just tell me. Every answer is highly appreciated and responded immidiately.
Thank you.

I'm just starting with Hibernate, but I'm using sessionFactory.getCurrentSession() instead of openSession().

After saveOrUpdate() mehod just flush the session. Ex: session.flush();
For more details you can see my blog here:
http://www.onlinetutorialspoint.com/hibernate/hibernate-example.html

We Keep Coding

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

org.hibernate.hql.ast.QuerySyntaxException - java

Looks obvious to me : "users is not mapped..." Either you didn't map the Users table, or you have it incorrectly configured.

#Entity #Table(name="users") public class Login { You actually need to annotate Login class since you say (<property name="annotatedClasses">) that in application-context.xml for example like this. #Column(name="password") public String getPassword() { return password; }

List list = getHibernateTemplate().find("from Form3A where FAC_ID=?",FAC_ID); HERE Form3A is name of class and config file is <property name="annotatedClasses"> <list> <value>org.fbis.models.Form3A</value> </list> </property>

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Hibernate doesn't update record in MySQL database

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