know that this issue was discussed here dozen of times. I tried to apply all answers, but my code s still working.
Can anybody tell me what am I doing wrong?
I'm getting the following exception:
Code:
Dec 6, 2010 2:14:07 PM org.hibernate.LazyInitializationException <init>
SEVERE: could not initialize proxy - no Session
org.hibernate.LazyInitializationException: could not initialize proxy - no Session
I tried to apply all suggestion from the forum and google, but still getting the same problem:
All my related code is the following:
Spring MVC controller Method:
Code:
@Autowired
private UserService userService;
@RequestMapping(value="/getSceneMetaData.dlp",method = RequestMethod.GET)
@ResponseBody
public Scene getSceneMetaData(@RequestParam String id){
Scene scene = userService.getScene(Long.parseLong(id));
return scene;
}
my Hibernate configuration:
Code:
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="org.postgresql.Driver" />
<property name="url" value="jdbc:postgresql://127.0.0.1/doolloop2" />
<property name="username" value="doolloop2" />
<property name="password" value="doolloop" />
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="mappingLocations">
<list>
<value>WEB-INF/mapping/Scene.hbm.xml</value>
<value>WEB-INF/mapping/Author.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.cache.use_second_level_cache">true</prop>
<prop key="hibernate.cache.use_query_cache">true</prop>
<prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop>
</props>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="userDAO" class="com.doolloop.services.UserDAO">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<bean id="txProxyTemplate" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" abstract="true">
<property name="transactionManager" ref="transactionManager"/>
<property name="transactionAttributes">
<props>
<prop key="add*">PROPAGATION_REQUIRED</prop>
<prop key="update*">PROPAGATION_REQUIRED</prop>
<prop key="delete*">PROPAGATION_REQUIRED</prop>
<prop key="*">PROPAGATION_SUPPORTS,readOnly</prop>
</props>
</property>
</bean>
<bean id="userService" parent="txProxyTemplate">
<property name="target">
<bean class="com.doolloop.services.UserServiceImpl">
<property name="userDAO" ref="userDAO"/>
</bean>
</property>
<property name="proxyInterfaces" value="com.doolloop.services.UserService"/>
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/getSceneMetaData.dlp">viewResolver</prop>
</props>
</property>
<property name="interceptors">
<list>
<bean class="org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor">
<property name="sessionFactory" ref="sessionFactory"/>
<property name="flushModeName" value="FLUSH_AUTO" />
</bean>
</list>
</property>
</bean>
UserDAO class:
Code:
public class UserDAO extends HibernateDaoSupport{
public Scene getScene(Long id){
Scene scene = getHibernateTemplate().get(Scene.class, id);
return scene;
}
}
UserService implementation:
Code:
public class UserServiceImpl implements UserService {
private UserDAO userDAO;
public UserDAO getUserDAO() {
return userDAO;
}
public void setUserDAO(UserDAO userDAO) {
this.userDAO = userDAO;
}
@Override
public Scene getScene(Long id) {
// TODO Auto-generated method stub
Scene scene = userDAO.getScene(id);
return scene;
}
}
All relevant XML mapping
Code:
<class
name="com.doolloop.objects.Scene"
table="scene"
>
<id
name="id"
column="Id"
type="java.lang.Long"
unsaved-value="null"
>
<generator class="sequence">
<param name="sequence">doolloop2.sceneseq</param>
</generator>
</id>
<many-to-one
name="author"
class="com.doolloop.objects.Author"
cascade="all"
column="authorid"
unique="false"
/>
</class>
<hibernate-mapping>
<class
name="com.doolloop.objects.Author"
table="authors"
>
<id
name="id"
column="Id"
type="java.lang.Long"
unsaved-value="null"
>
<generator class="sequence">
<param name="sequence">doolloop2.authorseq</param>
</generator>
</id>
<property
name="name"
update="true"
insert="true"
not-null="false"
unique="false"
type="java.lang.String"
>
<column name="name" />
</property>
</class>
Now the User and Author classes itself:
Code:
public class Scene implements Serializable{
private Long id;
private Author author;
//omitting getters and setters
}
public class Author{
private Long id;
Private String name;
//omitting getters and setters
}
my web.xml has the following:
Code:
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>WEB-INF/applicationContext.xml</param-value>
</context-param>
<filter>
<filter-name>openSessionInViewFilter</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
<init-param>
<param-name>sessionFactory</param-name>
<param-value>sessionFactory</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>openSessionInViewFilter</filter-name>
<url-pattern>/getSceneMetaData.dlp</url-pattern>
</filter-mapping>
When I'm looking at log4j this is what see:
Code:
2010-12-06 11:48:09,031 DEBUG [org.springframework.orm.hibernate3.support.OpenSessionInViewFilter] - Using SessionFactory 'sessionFactory' for OpenSessionInViewFilter
2010-12-06 11:48:09,036 DEBUG [org.springframework.beans.factory.support.DefaultListableBeanFactory] - Returning cached instance of singleton bean 'sessionFactory'
2010-12-06 11:48:09,040 DEBUG [org.springframework.orm.hibernate3.support.OpenSessionInViewFilter] - Opening single Hibernate Session in OpenSessionInViewFilter
2010-12-06 11:48:09,042 DEBUG [org.springframework.orm.hibernate3.SessionFactoryUtils] - Opening Hibernate Session
2010-12-06 11:48:09,048 DEBUG [org.springframework.web.servlet.DispatcherServlet] - DispatcherServlet with name 'doolloop' processing GET request for [/dlp/getSceneMetaData.dlp]
2010-12-06 11:48:09,056 DEBUG [org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping] - Mapping [/getSceneMetaData.dlp] to HandlerExecutionChain with handler [com.doolloop.controllers.SceneController@21c33b55] and 2 interceptors
2010-12-06 11:48:09,060 DEBUG [org.springframework.web.servlet.DispatcherServlet] - Last-Modified value for [/dlp/getSceneMetaData.dlp] is: -1
2010-12-06 11:48:09,142 DEBUG [org.springframework.core.convert.support.GenericConversionService] - Converting value '140' of [TypeDescriptor java.lang.String] to [TypeDescriptor @org.springframework.web.bind.annotation.RequestParam java.lang.String]
2010-12-06 11:48:09,146 DEBUG [org.springframework.core.convert.support.GenericConversionService] - Converted to '140'
2010-12-06 11:48:09,148 DEBUG [org.springframework.web.bind.annotation.support.HandlerMethodInvoker] - Invoking request handler method: public com.doolloop.objects.Scene com.doolloop.controllers.SceneController.getSceneMetaData(java.lang.String)
2010-12-06 11:48:16,401 DEBUG [org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerExceptionResolver] - Resolving exception from handler [com.doolloop.controllers.SceneController@21c33b55]: org.codehaus.jackson.map.JsonMappingException: could not initialize proxy - no Session (through reference chain: com.doolloop.objects.Scene["author"]->com.doolloop.objects.Author_$$_javassist_4["name"])
2010-12-06 11:48:16,561 DEBUG [org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver] - Resolving exception from handler [com.doolloop.controllers.SceneController@21c33b55]: org.codehaus.jackson.map.JsonMappingException: could not initialize proxy - no Session (through reference chain: com.doolloop.objects.Scene["author"]->com.doolloop.objects.Author_$$_javassist_4["name"])
2010-12-06 11:48:16,568 DEBUG [org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver] - Resolving exception from handler [com.doolloop.controllers.SceneController@21c33b55]: org.codehaus.jackson.map.JsonMappingException: could not initialize proxy - no Session (through reference chain: com.doolloop.objects.Scene["author"]->com.doolloop.objects.Author_$$_javassist_4["name"])
2010-12-06 11:48:16,572 DEBUG [org.springframework.web.servlet.DispatcherServlet] - Could not complete request
org.codehaus.jackson.map.JsonMappingException: could not initialize proxy - no Session (through reference chain: com.doolloop.objects.Scene["author"]->com.doolloop.objects.Author_$$_javassist_4["name"])
at org.codehaus.jackson.map.JsonMappingException.wrapWithPath(JsonMappingException.java:215)
//// Entire stack trace goes here.
2010-12-06 11:48:16,660 DEBUG [org.springframework.orm.hibernate3.support.OpenSessionInViewFilter] - Closing single Hibernate Session in OpenSessionInViewFilter
2010-12-06 11:48:16,662 DEBUG [org.springframework.orm.hibernate3.SessionFactoryUtils] - Closing Hibernate Session
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