LazyInitializationException with SpringOpenEntityManagerInViewFilter - spring

Question

Despite I'm using SpringOpenEntityManagerInViewFilter, I'm getting LazyInitializationException after to get some results.
The mystery is why I'm getting the first results (rows) right and then it gets tired and I don't get more results.
I've try everything I've read here I've almost read all the post here, I'm still stuck here.
I'm newbie with Spring data jpa, I suspect it could be a nonsense
these are my files:
web.xml
.....
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring-config/*.xml</param-value>
</context-param>
<filter>
<filter-name>SpringOpenEntityManagerInViewFilter</filter-name>
<filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
<init-param>
<param-name>entityManagerFactoryBeanName</param-name>
<param-value>entityManagerFactory</param-value>
</init-param>
<init-param>
<param-name>flushMode</param-name>
<param-value>AUTO</param-value>
</init-param>
<init-param>
<param-name>singleSession</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>SpringOpenEntityManagerInViewFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>
<listener>
<listener-class>com.sun.faces.config.ConfigureListener</listener-class>
</listener>
ApplicationContext.xml
<context:annotation-config />
<jpa:repositories base-package="com.previsionx.web.repositories" />
<!-- Scan for all of Spring components such as Spring Service -->
<context:component-scan base-package="com.previsionx.web"> </context:component-scan>
<!-- Necessary to get the entity manager injected into the factory bean -->
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<!-- Define Hibernate JPA Vendor Adapter -->
<bean id="jpaVendorAdapter"
class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="databasePlatform"
value="org.hibernate.dialect.MySQLDialect" />
</bean>
<!-- Entity Manager Factory -->
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
<property name="persistenceUnitName" value="previsionx"></property>
<property name="jpaVendorAdapter" ref="jpaVendorAdapter" />
</bean>
<!-- Transaction Manager -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<!-- Detect #Transactional -->
<tx:annotation-driven transaction-manager="transactionManager" />
PoSrvc.java
#Transactional
public class PoSrvc implements IPoSrvc {
#Autowired
private IPoRepository poRepository;
#Autowired
private IPoBuRepository poBuRepository;
#Override
#Transactional
public List<Po> getAllByBu(long buId) {
Set<Po> poSet = new LinkedHashSet<Po>();
poSet.addAll(poBuRepository.findPoByBuId(buId));
poSet.addAll(poRepository.findByCreatorBuId(buId));
List<Po> list = new LinkedList<Po>();
list.addAll(poSet);
return list;
}
IPoRepository.java
public interface IPoRepository extends JpaRepository<Po,Long>{
List<Po> findByCreatorBuId(long buId);
Po findById(long id);
IPoBuRepository.java
public interface IPoBuRepository extends JpaRepository<PoBu, Long> {
#Query("SELECT p FROM PoBu pb INNER JOIN pb.po p WHERE pb.po.id = p.id AND pb.bu.id=:id ORDER BY pb.po.ref")
List<Po> findPoByBuId(#Param("id") long id);
ManagePo.java
#ManagedBean
#ViewScoped
public class ManagePO implements Serializable {
......
#ManagedProperty("#{poSrvc}")
#Autowired
private IPoSrvc poSrvc;
#ManagedProperty("#{buSrvc}")
#Autowired
private IBuSrvc buSrvc;
#PostConstruct
public void init(){
this.readOnly=false;
poList = poSrvc.getAllByBu(appcontext.getBuId());
........
}
Any suggestion is welcome because I don't know whatelse to do :(
Thank you very much in advance
EDIT:
the exception trace
GRAVE: Error Rendering View[/secure/managepo.xhtml]
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.previsionx.entities.Po.PoBuList, could not initialize proxy - no Session
at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:572)
at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:212)
at org.hibernate.collection.internal.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:153)
at org.hibernate.collection.internal.PersistentBag.size(PersistentBag.java:278)
at javax.faces.model.ListDataModel.isRowAvailable(ListDataModel.java:109)
at javax.faces.model.ListDataModel.setRowIndex(ListDataModel.java:184)
at javax.faces.model.ListDataModel.setWrappedData(ListDataModel.java:219)
at javax.faces.model.ListDataModel.<init>(ListDataModel.java:78)
at com.sun.faces.facelets.component.UIRepeat.getDataModel(UIRepeat.java:263)
at com.sun.faces.facelets.component.UIRepeat.setIndex(UIRepeat.java:523)
at com.sun.faces.facelets.component.UIRepeat.process(UIRepeat.java:577)
at com.sun.faces.facelets.component.UIRepeat.encodeChildren(UIRepeat.java:1110)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1856)
at org.primefaces.component.column.Column.renderChildren(Column.java:304)
at org.primefaces.component.datatable.DataTableRenderer.encodeCell(DataTableRenderer.java:963)
at org.primefaces.component.datatable.DataTableRenderer.encodeRow(DataTableRenderer.java:919)
at org.primefaces.component.datatable.DataTableRenderer.encodeRows(DataTableRenderer.java:830)
at org.primefaces.component.datatable.DataTableRenderer.encodeTbody(DataTableRenderer.java:777)
at org.primefaces.component.datatable.DataTableRenderer.encodeTbody(DataTableRenderer.java:740)
at org.primefaces.component.datatable.feature.PageFeature.encode(PageFeature.java:36)
at org.primefaces.component.datatable.DataTableRenderer.encodeEnd(DataTableRenderer.java:78)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:919)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1863)
at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:582)
at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
at org.primefaces.component.api.UIData.visitTree(UIData.java:692)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIForm.visitTree(UIForm.java:371)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:1700)
at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:403)
at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:322)
at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:60)
at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:1004)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1856)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:430)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:133)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:647)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at com.previsionx.web.utils.NoCacheFilter.doFilter(NoCacheFilter.java:33)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:177)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
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:100)
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:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Answer 1

I've solved using a Primefaces Lazy datatable
The problem seems to be that once the page is rendered the hibernate session gets closed.
Service, repository and manageBean have chaged a bit
Service:
#Component
public class PoSrvc implements IPoSrvc {
#Autowired
private IPoBuRepository poBuRepository;
#Override
#Transactional
public List<Po> getAllByBu(long buId, int page, int results, String sort, SortOrder sortOrder) {
Pageable pageable = new PageRequest(
page, results,new Sort(new Order(SortOrder.ASCENDING.equals(sortOrder)? Direction.ASC: Direction.DESC, "po."+sort))
);
return poBuRepository.findPoByBuId(buId,pageable);
}
#Override
public int getCountAllByBu(long buId) {
return poBuRepository.findCountAllByBuId(buId);
}
Repository:
public interface IPoBuRepository extends JpaRepository<PoBu, Long> {
#Query("SELECT DISTINCT po FROM PoBu pb WHERE (pb.bu.id=:id OR pb.po.creatorBu.id=:id) AND pb.po.deleted=false")
List<Po> findPoByBuId(#Param("id") long id,Pageable pageable);
#Query("SELECT COUNT (DISTINCT pb.po) FROM PoBu pb WHERE (pb.bu.id=:id OR pb.po.creatorBu.id=:id) AND pb.po.deleted=false")
int findCountAllByBuId(#Param("id") long id);
And my managedBean:
#ManagedBean
#ViewScoped
public class ManagePO implements Serializable {
private static final long serialVersionUID = 8947292155668339391L;
#ManagedProperty(value="#{appContext}")
private AppContext appcontext;
#ManagedProperty("#{poSrvc}")
private IPoSrvc poSrvc;
private LazyDataModel<Po> lazyModel;
#PostConstruct
public void init(){
this.readOnly=false;
this.lazyModel = new LazyPoDataModel(appcontext.getBuId(), poSrvc);
Finally this the Lazy table model:
public class LazyPoDataModel extends LazyDataModel<Po> {
private static final long serialVersionUID = 1L;
private long buId;
private IPoSrvc poSrvc;
public LazyPoDataModel(long buId, IPoSrvc poSrvc) {
super();
this.buId = buId;
this.poSrvc = poSrvc;
this.setRowCount(this.poSrvc.getCountAllByBu(buId));
}
#Override
public List<Po> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String,Object> filters) {
List<Po> data = new LinkedList<Po>();
int page = first/pageSize;
if(sortField==null){
sortField = "ref";
}
data=poSrvc.getAllByBu(buId, page, pageSize, sortField, sortOrder);
return data;
}
Now no LazyInitializationException is thrown anymore!!!
Thanks for clues!
EDIT:
the XHTML:
<p:dataTable id="po_tbl" value="#{managePO.lazyModel}" styleClass="order-table" headerClass="order-table-header" rowClasses="order-table-odd-row,order-table-even-row" var="po" style="width:1000px;"
resizableColumns="true" paginator="true"
paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
rowsPerPageTemplate="10,20,30,50" rows="10" lazy="true">
<p:column sortBy="#{po.ref}">
<!-- column header -->
<f:facet name="header">#{msg['tbl_hdr_po.manage_po']}</f:facet>
<!-- row record -->
<h:outputText value="#{po.ref}" />
</p:column>
<p:column styleClass="text-right">
<f:facet name="header">#{msg['tbl_hdr_total.manage_po']}</f:facet>
<h:outputText value="#{po.weight} #{po.weightUnit}" />
</p:column>
<p:column sortBy="#{po.product}">
<f:facet name="header">#{msg['tbl_hdr_product.manage_po']}</f:facet>
#{po.product}
</p:column>
<p:column sortBy="#{po.creatorBu.ref}">
<f:facet name="header">#{msg['tbl_hdr_creator.manage_po']}</f:facet>
#{po.creatorBu.ref}
</p:column>