Java EE (Java Enterprise Edition) General Discussion

Hi,

I have a field with a set of String to save and edit the value of selectManyCheckbox. I use the annotation @ElementCollection as described in
[http://docs.oracle.com/javaee/6/tutorial/doc/bnbqa.html |http://docs.oracle.com/javaee/6/tutorial/doc/bnbqa.html]
I can save at the first time but by editing I got the following exceptions:

Caused by: javax.servlet.ServletException: failed to lazily initialize a collection, no session or session was closed
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:606) [jboss-jsf-api_2.1_spec-2.0.0.Final.jar:2.0.0.Final]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.10.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.10.Final.jar:]
at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79) [primefaces-3.3.jar:]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.10.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.10.Final.jar:]
at org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:62) [weld-core-1.1.5.AS71.Final.jar:2012-02-10 15:31]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.10.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.10.Final.jar:]
at org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:65) [solder-impl-3.1.0.Final.jar:3.1.0.Final]
... 29 more
Caused by: org.hibernate.LazyInitializationException: failed to lazily initialize a collection, no session or session was closed
at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:393) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:385) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:378) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at org.hibernate.collection.internal.PersistentSet.add(PersistentSet.java:206) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]
at com.sun.faces.renderkit.html_basic.MenuRenderer.convertSelectManyValuesForModel(MenuRenderer.java:382) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT]
at com.sun.faces.renderkit.html_basic.MenuRenderer.convertSelectManyValue(MenuRenderer.java:129) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT]
at com.sun.faces.renderkit.html_basic.MenuRenderer.getConvertedValue(MenuRenderer.java:315) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT]
at javax.faces.component.UIInput.getConvertedValue(UIInput.java:1030) [jboss-jsf-api_2.1_spec-2.0.0.Final.jar:2.0.0.Final]
at javax.faces.component.UIInput.validate(UIInput.java:960) [jboss-jsf-api_2.1_spec-2.0.0.Final.jar:2.0.0.Final]
at javax.faces.component.UIInput.executeValidate(UIInput.java:1233) [jboss-jsf-api_2.1_spec-2.0.0.Final.jar:2.0.0.Final]
at javax.faces.component.UIInput.processValidators(UIInput.java:698) [jboss-jsf-api_2.1_spec-2.0.0.Final.jar:2.0.0.Final]
at javax.faces.component.UIForm.processValidators(UIForm.java:253) [jboss-jsf-api_2.1_spec-2.0.0.Final.jar:2.0.0.Final]
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1214) [jboss-jsf-api_2.1_spec-2.0.0.Final.jar:2.0.0.Final]
at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1172) [jboss-jsf-api_2.1_spec-2.0.0.Final.jar:2.0.0.Final]
at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:76) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT]
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT]
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT]
at org.apache.myfaces.extensions.cdi.jsf2.impl.listener.phase.CodiLifecycleWrapper.execute(CodiLifecycleWrapper.java:95) [myfaces-extcdi-jsf20-module-impl-1.0.5.jar:1.0.5]
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593) [jboss-jsf-api_2.1_spec-2.0.0.Final.jar:2.0.0.Final]
... 38 more


I use JBOSS 7.1.0-Final, Hibernate 4.0.1.Final and JSF 2.0

Following are my codes:

Test.java_

@Entity
@Table(name = "TEST")
@NamedQueries({
@NamedQuery(name = Test.FIND_BY_ID, query = "select test from Test test where test.id = :id")
})
public class Test implements Serializable {

private static final long serialVersionUID = -7294677843656741933L;

public static final String FIND_BY_ID = "test.by.id";

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;

*@ElementCollection(fetch=FetchType.EAGER)*
private Set<String> textes;


public Test() {
}

public Long getId() {
return id;
}

public void setId(Long id) {
this.id = id;
}

public Set<String> getTextes() {
return textes;
}

public void setTextes(Set<String> textes) {
this.textes = textes;
}
}


test.xhtml_

<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:c="http://java.sun.com/jsp/jstl/core">

<body>
<h:form id="form">
*<h:selectManyCheckbox value="#{formBean.test.textes}">*
<f:selectItem itemLabel="Option 1" itemValue="Option 1" />
<f:selectItem itemLabel="Option 2" itemValue="Option 2" />
<f:selectItem itemLabel="Option 3" itemValue="Option 3" />
</h:selectManyCheckbox>

<h:commandButton value="Save" action="#{formBean.saveTest}" />
</h:form>
</body>
</html>


Following are the related sources:

FormBean.java_

@Named
@SessionScoped
public class FormBean implements Serializable {

private static final long serialVersionUID = 6484233109393875203L;

@EJB
private ServiceBean serviceBean;

private Test test;

public String saveTest() {
serviceBean.save(test);
return "test";
}

public String createTest() {
test = new Test();
return "test";
}

public Test getTest() {
return test;
}

public void setTest(Test test) {
this.test = test;
}

}


ServiceBean.java_

@Stateless
@LocalBean
public class ServiceBean {

@PersistenceContext
private EntityManager entityManager;

public boolean save(Test test) {
Test dbTest = findTestById(test.getId());
if (dbTest == null) {
entityManager.persist(test);
}
else {
entityManager.merge(test);
}

return true;
}

public Test findTestById(Long id) {
if (id == null)
return null;

TypedQuery<Test> query = entityManager.createNamedQuery(Test.FIND_BY_ID, Test.class);
query.setParameter("id", id);
List<Test> results = query.getResultList();

if (results.isEmpty())
return null;

return results.get(0);
}
}


test_index.xhtml

<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:c="http://java.sun.com/jsp/jstl/core">

<body>
<h:form>
<h:commandLink value="Test" action="#{formBean.createTest()}" />
</h:form>
</body>
</html>

Thanks for helps
Nguyen