Hi I have a Java web application using spring and hibernate.
I have a model class called Role. For all model classes there is common GenericDao.java
public interface GenericDao<T>{
public void insert(T transientInstance);
public T findById(Class<?> clazz, Serializable id);
}
GenericHibernateDao.java
#Repository
public class GenericHibernateDao<T extends Serializable>
implements GenericDao<T>{
#Resource
protected SessionFactory sessionFactory;
#Override
public void insert(T transientInstance) {
sessionFactory.getCurrentSession().persist(transientInstance);
}
#SuppressWarnings("unchecked")
#Override
public T findById(Class<?> clazz, Serializable id) {
return (T) sessionFactory.getCurrentSession().get(clazz, id);
}
}
RoleService.java
public interface RoleService {
public void insert(Role role);
public Role findById(Integer id);
}
And has its implementation RoleServiceImpl.java
#Service
public class RoleServiceImpl implements RoleService {
#Autowired
private GenericDao<Role> roleDao;
#Override
public void insert(Role role) {
roleDao.insert(role);
}
#Override
public Role findById(Integer id) {
return roleDao.findById(Role.class, id);
}
}
I have a controller which calls this findbyid methid and passing a value - RegisterController.java
#Controller
public class UserRegisterController {
#Autowired
public RoleService roleService;
#RequestMapping(value = "/register", method = RequestMethod.POST, consumes= MediaType.APPLICATION_JSON_VALUE)
#ResponseBody
public void registerUser(#RequestBody User user)
{
Role role=new Role();
role=roleService.findById(1);
System.out.println("Saved");
}
}
Finally my spring applicationContext.xml is
<bean id="dataSource" class="bitronix.tm.resource.jdbc.PoolingDataSource"
init-method="init" destroy-method="close">
<property name="className"
value="com.mysql.jdbc.jdbc2.optional.MysqlXADataSource" />
<property name="uniqueName" value="ocr/DocumentDatabase" />
<property name="minPoolSize" value="1" />
<property name="maxPoolSize" value="5" />
<property name="automaticEnlistingEnabled" value="true" />
<property name="allowLocalTransactions" value="true" />
<property name="useTmJoin" value="true" />
<property name="shareTransactionConnections" value="true" />
<property name="driverProperties">
<props>
<prop key="url">${jdbc.url}</prop>
<prop key="user">${jdbc.username}</prop>
<prop key="password">${jdbc.password}</prop>
</props>
</property>
</bean>
<bean id="bitronixTransactionManager" factory-method="getTransactionManager"
class="bitronix.tm.TransactionManagerServices" depends-on="btmConfig, dataSource"
destroy-method="shutdown" />
<bean id="transactionManager"
class="org.springframework.transaction.jta.JtaTransactionManager">
<property name="transactionManager" ref="bitronixTransactionManager" />
<property name="userTransaction" ref="bitronixTransactionManager" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"
destroy-method="destroy">
<property name="dataSource" ref="dataSource" />
<property name="jtaTransactionManager" ref="transactionManager"/>
<property name="configLocation" value="classpath:hibernate.cfg.xml" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.query.substitutions">true 'Y', false 'N'</prop>
</props>
</property>
</bean>
I run this application in tomcat. It gives the following error.
SEVERE: Servlet.service() for servlet [myappdemo] in context with path [/myappdemo] threw exception [Request processing failed; nested exception is org.hibernate.HibernateException: Unable to locate current JTA transaction] with root cause
org.hibernate.HibernateException: Unable to locate current JTA transaction
at org.hibernate.context.internal.JTASessionContext.currentSession(JTASessionContext.java:88)
at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:90)
at org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:980)
at com.myapp.myappdemo.dao.hibernate.GenericHibernateDao.findById(GenericHibernateDao.java:46)
at com.myapp.myappdemo.dao.hibernate.GenericHibernateDao.findById(GenericHibernateDao.java:15)
at com.myapp.myappdemo.service.impl.RoleServiceImpl.findById(RoleServiceImpl.java:38)
at com.myapp.myappdemo.web.UserRegisterController.registerUser(UserRegisterController.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:920)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:827)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:801)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
It happens when I call the roleService.findById(1);
Why its happening? And how can I resolve?
I am using spring 3.2.1.RELEASE, Hibernate 4.2.0.Final, btm 2.1.3
The sessionFactory is configured to use JtaTransactionManager. When you do that, hibernate is smart enough to look into current transactionnal resources to find the session.
Your spring configuration allows you to use annotations to do transaction demarcation.
Your transaction manager seems correctly configured.
So, everything looks fine. The only missing part are the transactional annotations !
Just add #Transactional in your service layer:
#Override
#Transactional
public Role findById(Integer id) {
return roleDao.findById(Role.class, id);
}
(you can also put this annotation on the service class)
Related
i use hibernate 5 and spring 4 mapped my class and used entity name in creating queries but i get
> SEVERE: Servlet.service() for servlet [dispatcher] in context with
> path [/emusicstore] threw exception [Request processing failed; nested
> exception is java.lang.IllegalArgumentException:
> org.hibernate.hql.internal.ast.QuerySyntaxException: Product is not
> mapped [FROM Product]] with root cause
> org.hibernate.hql.internal.ast.QuerySyntaxException: Product is not
> mapped
part of my codes that is necessary is included!
my controller
#Controller
public class HomeController {
#Autowired
private ProductDaoImpl productDaoImpl;
#RequestMapping(value = "/productList")
public String getProduct(Model model) {
List<Product> products = productDaoImpl.getAllProducts();
model.addAttribute("products", products);
return "productList";
}
My Product getting Function
public List<Product> getAllProducts() {
Session session;
try {
session = sessionFactory.getCurrentSession();
System.out.println("SDSDSASDASDASD");
} catch (HibernateException e) {
session = sessionFactory.openSession();
System.out.println("Error in session get all");
}
Query query = session.createQuery("FROM Product");
List<Product> products = query.list();
session.flush();
return products;
}
My applicattion Context
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
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">
<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:1521:orcl" />
<property name="username" value="c##alireza" />
<property name="password" value="myjava123" />
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
</props>
</property>
<property name="packagesToScan">
<list>
<value>com.mywebsite.contorller</value>
<value>com.mywebsite.dao.impl</value>
<value>com.mywebsite.model</value>
</list>
</property>
</bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
</beans>
tnx For ur help!
In order for Hibernate to recognize your entity class, the class must be annotated with #Entity and located in one of the packages defined in the property packagesToScan of your sessionFactory.
I am new to Spring and JPA I am having an issue with a TransactionRequiredException. I tried the tips located here, here and here (such as annotating with #Transactional, starting transactions manually etc.)
My code is as follows:
Goal.java
#Entity
#Table(name = "goals")
public class Goal
{
#Id
#GeneratedValue
#Column(name = "GOAL_ID")
private Long id;
#Range(min = 1, max = 120)
#Column(name = "MINUTES")
private int minutes;
public int getMinutes()
{
return minutes;
}
public void setMinutes(int minutes)
{
this.minutes = minutes;
}
public Long getId()
{
return id;
}
public void setId(Long id)
{
this.id = id;
}
}
GoalRepositoryImpl.java
#Repository("goalRepository")
#Transactional
public class GoalRepositoryImpl implements IGoalRepository
{
#PersistenceContext
private EntityManager em;
public Goal save(Goal goal)
{
em.persist(goal);
return goal;
}
}
GoalServiceImpl.java
#Service("goalService")
public class GoalServiceImpl implements IGoalService
{
#Autowired
private IGoalRepository goalRepository;
#Transactional
public Goal save(Goal goal)
{
return goalRepository.save(goal);
}
}
GoalController
#Controller
#SessionAttributes("goal")
public class GoalController
{
#Autowired
private IGoalService goalService;
#RequestMapping(value = "/addGoal", method = RequestMethod.POST)
public String updateGoal(#Valid #ModelAttribute("goal") Goal goal, BindingResult result){
if (result.hasErrors()){
return "addGoal";
}else{
goalService.save(goal);
}
return "redirect:addMinutes.html";
}
}
jpaContext.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"
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/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:annotation-config/>
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="punit" />
<property name="dataSource" ref="datasource"/>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
</bean>
</property>
<property name="jpaPropertyMap">
<map>
<entry key="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect"/>
<entry key="hibernate.hbm2ddl.auto" value="create"/>
<entry key="hibernate.format_sql" value="true"/>
</map>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
<bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/fitness_tracker?autoReconnect=true"/>
<property name="username" value="root" />
<property name="password" value="root" />
</bean>
Tomcat Log
SEVERE: Servlet.service() for servlet [fitTrackerServlet] in context with path [] threw exception [Request processing failed; nested exception is javax.persistence.TransactionRequiredException: No EntityManager with actual transaction available for current thread - cannot reliably process 'persist' call] with root cause
javax.persistence.TransactionRequiredException: No EntityManager with actual transaction available for current thread - cannot reliably process 'persist' call
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:282)
at com.sun.proxy.$Proxy41.persist(Unknown Source)
at ie.wit.repository.GoalRepositoryImpl.save(GoalRepositoryImpl.java:22)
at ie.wit.service.GoalServiceImpl.save(GoalServiceImpl.java:25)
at ie.wit.controller.GoalController.updateGoal(GoalController.java:40)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1082)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2517)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2506)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
There are things i cannot see from your project, so i cannot be sure
include spring.tx in your pom or add the library whichever way you are doing it
#Configuration #EnableTransactionManagement
without these two steps you cannot start or commit a transaction.
This question already has answers here:
Why is my Spring #Autowired field null?
(21 answers)
Closed 6 years ago.
Its the First time i am integrating spring with hibernate, When i
invoke any method of Dao class i am getting null pointer Exception
I am using abstract factory pattern Source code of Abstract class :
public abstract class Content {
#Autowired
HibernateOperations ho;
#Transactional
public List<ContentDes> getContentDes(String sql,int limit){
//do it with autowired
List<Object[]> ls = new ArrayList<Object[]>();
List<ContentDes> contentDes_ls = new ArrayList<ContentDes>();
System.out.println("--before invoking method---");
ho.just_print();
ls = ho.getResultListByLimit(sql,limit);
for(Object[] obj: ls){
ContentDes contentDes = new ContentDes();
contentDes.setCode((String)obj[0]);
contentDes.setContent_prv((String)obj[1]);
contentDes.setPricetag((String)obj[2]);
contentDes_ls.add(contentDes);
}
return contentDes_ls;
}
abstract List<ContentDes> getRandomContent(int limit);
//abstract List<ContentDes> getDistinctCat();
}
And i have five class that are extending my Content Class: coding of
one of my child id liem below:
public class Wallpaper extends Content{
#Override
public List<ContentDes> getRandomContent(int limit) {
String sql = "select code,prv,pricetag from Wallpaper where cat not like 'Holy Deities' order by rand() limit "+limit+"";
List<ContentDes> contentDes_ls = new ArrayList<ContentDes>();
contentDes_ls = getContentDes(sql,limit);
return contentDes_ls;
}
}
And class which returning clasess obects according to the content type
is :
public class GetContentFactory {
//use getContent method to get object of type Content
public Content getContent(String contentType) {
contentType = contentType.toLowerCase();
if (contentType.equalsIgnoreCase("wallpaper")) {
return new Wallpaper();
} else if (contentType.equalsIgnoreCase("animation")) {
return new Animation();
} else if (contentType.equalsIgnoreCase("ringtone")) {
return new Ringtone();
} else if (contentType.equalsIgnoreCase("video")) {
return new Video();
}
else if (contentType.equalsIgnoreCase("game")) {
return new Game();
}
else {
System.out.println(" unknow request in GetContentFactory class");
}
return null;
}
}//end of GetContentFactory class.
My main class is :
public class GetContent {
GetContentFactory contentFactory = new GetContentFactory();
}
public List<ContentDes> getRandomContent(String content_type, int limit) {
List<ContentDes> contentDes_ls = new ArrayList<ContentDes>();
Content con = contentFactory.getContent(content_type);
contentDes_ls = con.getRandomContent(limit);
for (ContentDes contentDes : contentDes_ls) {
System.out.println("prv----"+contentDes.getContent_prv());
}
return contentDes_ls;
}
}
Code of my dao class is :
#Repository
public class HibernateOperations {
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sf){
this.sessionFactory = sf;
}
//pass the sql query to get result for multiple column
public List<Object[]> getResultListByLimit(String query,int limit){
System.out.println("in get result-------");
Session session = this.sessionFactory.getCurrentSession();
List<Object[]> ls_ob = new ArrayList<Object[]>();
Query q = session.createQuery(query);
q.setMaxResults(limit);
ls_ob = (List<Object[]>)q.list();
return ls_ob;
}
public List<Object> getListForSingleColumn(String query){
Session session = this.sessionFactory.getCurrentSession();
List<Object> ls_ob = new ArrayList<Object>();
Query q = session.createQuery(query);
ls_ob = q.list();
return ls_ob;
}
public void SaveObject(Object obj){
Session session = this.sessionFactory.getCurrentSession();
List<Object[]> ls_ob = new ArrayList<Object[]>();
session.save(obj);
}
public void just_print(){
System.out.println("---------in method hibenate operation------");
}
}
when My controller class methods call:
GetContent gc = new GetContent();
List<ContentDes> contentDes_ls = new ArrayList<ContentDes>();
contentDes_ls = gc.getRandomContent("wallpaper", 3);
i got an exception:
its prints the
--before invoking method---(its is the sout of my content class method Name "getContentDes")
Apr 25, 2016 6:03:04 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [DefaultServlet] in context with path [/slwap_sh] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
java.lang.NullPointerException
at lanka.content.get.Content.getContentDes(Content.java:37)
at lanka.content.get.Wallpaper.getRandomContent(Wallpaper.java:45)
at lanka.content.controller.ContentController.sriWap(ContentController.java:65)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:222)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:814)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:969)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:860)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:845)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1096)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:674)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
I am unable to call any of my Dao Class methods i got null pointer
when i called any method of my Dao(HibernateOperations.java) Class
Can anyone please help me to find out my mistake
coding of DefaultServlet-servlet.xml is like below:
<?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"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
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
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<mvc:annotation-driven />
<mvc:annotation-driven enable-matrix-variables="true" />
<context:component-scan base-package="lanka.content.controller" />
<context:component-scan base-package="lanka.content.domain" />
<context:component-scan base-package="lanka.content.utility" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<!-- start of languages xml code -->
<!-- lang param is defined in the mvc interceptor -->
<bean id="messageSource"
class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="basename" value="WEB-INF/propFiles/content" />
<property name="defaultEncoding" value="UTF-8" />
</bean>
<bean id="localeResolver"
class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
<property name="defaultLocale" value="en" />
</bean>
<!-- end of languages xml code -->
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**" />
<bean
class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
<property name="paramName" value="lang" />
</bean>
</mvc:interceptor>
<!-- <mvc:interceptor>
<mvc:mapping path="/**" />
<mvc:exclude-mapping path="/resources/**"/>
<bean id="storingWapHits"
class="vodafone.interceptor.StroringHits">
</bean>
</mvc:interceptor> -->
</mvc:interceptors>
<mvc:resources mapping="/resources/**" location="/resources/design/" />
<!-- start of hibernate integration -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/wapsite" />
<property name="username" value="root" />
<property name="password" value="" />
</bean>
<!-- hibernate4AnnotatedSessionFactory is a session fectory-->
<!-- Hibernate 4 SessionFactory Bean definition -->
<bean id="hibernate4AnnotatedSessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="annotatedClasses">
<list>
<value>lanka.content.table.Game</value>
<value>lanka.content.table.Scrsaver</value>
<value>lanka.content.table.Video</value>
<value>lanka.content.table.Wallpaper</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect
</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="hibernate4AnnotatedSessionFactory" />
</bean>
<!-- <bean id="personService" class="com.journaldev.spring.service.PersonServiceImpl">
<property name="personDAO" ref="personDAO"></property>
</bean>-->
<bean id="HibernateOperations" class="lanka.content.utility.HibernateOperations">
<property name="sessionFactory" ref="hibernate4AnnotatedSessionFactory" />
</bean>
</beans>
By doing :
new Wallpaper();
You are not letting spring do his work, that is to say inject things in your objects :
#Autowired
HibernateOperations ho;
ho will always be null.
Every Content subclasses should be spring beans, and you have to get rid of your GetContentFactory, and only autowire every single spring bean
EDIT : Abstract Factory Design
Define your beans like this :
#Component
#Scope(BeanDefinition.SCOPE_PROTOTYPE)
public class Wallpaper extends Content {
Declare the GetContentFactory as a spring bean as well :
#Component
public class GetContentFactory {
#Autowired
private Wallpaper wallpaper;
This has to be avoided as well :
GetContentFactory contentFactory = new GetContentFactory();
Want to use Spring to automatically work with Hibernate 4 sessions
Also I like to extends DAO, for not create many DAO for many entities
But there is problem:
SessionDAO.java
public abstract class SessionDAO extends HibernateDaoSupport{
public void startSession() {
getSession().beginTransaction();
}
public void closeSession() {
getSession().getTransaction().commit();
}
public void addObject() {
startSession();
getSession().save(this);
closeSession();
}
public Session getSession()
{
return getHibernateTemplate().getSessionFactory().getCurrentSession();
}
}
Values.java
#Entity
#Table
public class Values extends SessionDAO {
private int valuesId;
private double amount;
private Date date;
//...getters, setters, etc
}
dispatcher-servlet.xml
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="annotatedClasses">
<list>
<value>entity.Crypto</value>
<value>entity.Values</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<bean id="dataSource"
class="org.apache.tomcat.dbcp.dbcp.BasicDataSource">
<property name="driverClassName" value="oracle.jdbc.OracleDriver" />
<property name="url" value="jdbc:oracle:thin:#my.****.us-east-1.rds.amazonaws.com:1521:ORCL" />
<property name="username" value="****" />
<property name="password" value="****" />
</bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="persistenceExceptionTranslationPostProcessor"
class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
When start server, receive:
INFO: HHH000206: hibernate.properties not found
When try to load page receive:
SEVERE: Servlet.service() for servlet [dispatcher] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
java.lang.NullPointerException
on line
return getHibernateTemplate().getSessionFactory().getCurrentSession();
What's wrong?
Don't get the session by extend HibernateDaoSupport, just inject SessionFactory in DAO.
private HibernateTemplate hibernateTemplate;
public void setSessionFactory(SessionFactory sessionFactory) {
this.hibernateTemplate = new HibernateTemplate(sessionFactory);
}
but in my code i'm getting null pointer exception when i'm using session factory for second time . and it is working fine in first .
here is my code
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></property>
<property name="url" value="jdbc:mysql://localhost:3306/pdevice"></property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="hibernateProperties">
<props>
<prop key="show_sql">true</prop>
<prop key="dialect">org.hibernate.dialect.MySQL5Dialect</prop>
</props>
</property>
<property name="mappingResources">
<array>
<value>/LoginDTO.hbm.xml</value>
</array>
</property>
</bean>
<bean id="loginDAO" class="com.raj.sprmvc.dao.LoginDAOImpl">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<bean id="loginManager" class="com.raj.sprmvc.manager.LoginManagerImpl">
<property name="loginDAO" ref="loginDAO"></property>
</bean>
<!-- <bean id="login" class="com.raj.sprmvc.controller.LoginController">
<property name="loginManager" ref="loginManager"></property> </bean> -->
<bean id="commandController" name="/login.do" class="com.raj.sprmvc.controller.LoginController">
<property name="loginManager" ref="loginManager"></property>
<property name="commandClass" value="com.raj.sprmvc.dto.LoginDTO"></property>
<property name="validator" ref="loginValidator"></property>
</bean>
<bean id="loginValidator" class="com.raj.sprmvc.validator.LoginValidator"></bean>
<!-- ++++++++++++++++++++++to update place+++++++++++++++++++++ -->
<bean id="updateUNDAO" class="com.raj.sprmvc.dao.UpdateUNDAOImpl">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<bean id="updateManager" class="com.raj.sprmvc.manager.UpdateManagerImpl">
<property name="undao" ref="updateUNDAO"></property>
</bean>
<bean id="commandController1" name="/update.do"
class="com.raj.sprmvc.controller.UpdateController">
<property name="updateManager" ref="updateManager"></property>
<property name="commandClass" value="com.raj.sprmvc.dto.LoginDTO"></property>
<!-- <property name="validator" ref="loginValidator"></property> -->
</bean>
when i'm trying to use sessinfactory for second time it is giving nullpointer ..i know this basic concept but struggling to solve this pls share .......
thanks
this is the first module
public class LoginDAOImpl implements LoginDAO{
private SessionFactory sessionFactory;
#Override
public boolean isExist(LoginDTO ldto) {
Session session=sessionFactory.openSession();
Query query=session.createQuery(" FROM LoginDTO WHERE username='"+ldto.getUsername()+"' AND password='"+ldto.getPassword()+"'");
if(query.uniqueResult()!=null){
return true;
}
return false;
}
public SessionFactory getSessionFactory() {
return sessionFactory;
}
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
}
and in second module
public class UpdateUNDAOImpl implements UpdateUNDAO{
private SessionFactory sessionFactory;
public SessionFactory getSessionFactory() {
return sessionFactory;
}
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public void update(LoginDTO ldto){
Session session=sessionFactory.openSession();
System.out.println(session);
Transaction tr= session.beginTransaction();
tr.begin();
LoginDTO ldto1=(LoginDTO)session.load(LoginDTO.class, 1);
ldto1.setPlace(ldto.getPlace());
session.update(ldto1);
tr.commit();
session.close();
}
}
in this module the line Session session=sessionFactory.openSession(); is giving null pointer exception
exception
exception
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:659)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:563)
javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.27 logs.
exception