[jboss-user] [JBoss Seam] - Re: Session-Variable in Conversation Context (or so...)

[dschaedl]

It's exactly CRUD what I'd like to do.
I used Seam-gen to setup the project and to create my forms (originaly).
here us my current code (slightly simplified)
*** person.java ***
@Entity
@Name("person")
public class person implements Serializable {
	private Long id;
	private String name;
	private String firstName;
	
	@Id
	@GeneratedValue
	public Long getId() {..}
	public void setId(Long id) {..}
	
	@Length(min=3, max=120)
	public String getName() {..}
	public void setName(String name) {..}
	
	public String getFirstName() {..}
	public void setFirstName(String firstName) {..}

*** PersonManagerBean.java ***
@Stateful
@Scope(ScopeType.SESSION)
@Name("personManager")
public class PersonViewerBean implements PersonManager {

	@Logger 
	private Log log;
	
	@In(required=false)
	@Out
	private List  personList;
	
	@DataModel
	private List personsDataModel;
	
	@DataModelSelection
	@Out(required=false)
	private Person person;
	
	@PersistenceContext(type=PersistenceContextType.EXTENDED)
	private EntityManager em;
	
	@Factory("personsDataModel")
	public void findPersons() {
		personsDataModel = em.createQuery("from Person r order by r.name desc").getResultList();
		personList = personssDataModel;
	}

	@Remove @Destroy
	public void destroy(){}
}

*** EditPersonBean ***
@Stateful
@Name("editperson")
public class EditpersonBean implements Editperson {

	@Logger 
	private Log log;
	
	@PersistenceContext(type=PersistenceContextType.EXTENDED)
	private EntityManager em;
	
	@In 
	FacesMessages facesMessages;
	
	@In(required=false)
	@Out
	private Person person;
	
	@In
	@Out
	private List  personList;
	
	@Begin
	public void newPerson() {
		person = new person();
	}
	
	@End
	public void savePerson()
	{
		List existing = new ArrayList();
		existing = em.createQuery("select name from Person where name=#{person.name}").getResultList();
		if (existing == null || existing.size() == 0) {
			em.persist(person);
			personList.add(person);
		}
		else {
			facesMessages.add("a person with this name already exists! (name=#{person.name})");
		}
	}
	
	@End
	public void updateperson()
	{
		em.persist(person);
	}
	
	@Begin
	public void editperson(person r) {
		this.person = em.merge(r);
	}
	

	public person getperson() { ..}
	public void setperson(person person) {...}
	
	@Remove @Destroy
	public void destroy(){}
}

****** view.xhtml ******
...
<rich:panel>
				<f:facet name="header">Welcome!</f:facet>
				MY PERSON:
				<h:outputText value="nothing to display" rendered="#{personsDataModel.rowCount==0}" />
				<h:dataTable var="person" value="${personsDataModel}" rendered="#{personsDataModel.rowCount>0}">
					<h:column>
						<f:facet name="header">
							<h:outputText value="Name" />
						</f:facet>
						<h:commandLink value="#{person.name}" action="#{personManager.select}" /> <!-- action does nothing -->
					</h:column>
					<h:column>
						<f:facet name="header">
							<h:outputText value="Vorname" />
						</f:facet>
						<h:commandLink value="#{person.firstName}" action="#{personManager.select}" />
					</h:column>
					<h:column>
					  <s:link id="editperson" value="edit" action="#{editperson.editPerson(person)}" />
					</h:column>
				</h:dataTable>
				<h:commandButton value="refresh" action="#{personManager.findPersons}" />
				<h:commandButton value="new entry" action="#{editperson.newPerson}" />
				<h3><h:outputText value="#{rower.email}" /></h3>
			</rich:Panel>
...


***** edit.xhtml ****
....
<rich:panel>
				<f:facet name="header">editPerson</f:facet>
				<s:decorate id="firstnameDecoration" template="layout/edit.xhtml">
					<ui:define name="label">Vorname</ui:define>
					<h:inputText id="firstname" required="false" value="#{person.firstName}" />
				</s:decorate>
				<s:decorate id="nameDecoration" template="layout/edit.xhtml">
					<ui:define name="label">Name</ui:define>
					<h:inputText id="name" required="true" value="#{person.name}"/>
				</s:decorate>
...

***************************
Logging, Comments, some other stuff was left out.

when pressing the 'new' or 'edit' Button a new conversation starts and my List (personList) is copied into the conversation-context. At the end of the conversation I'd like to copy it back to the Session.personList.
How? possible? did I missunderstand something?

thanks
Daniel


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