Using the EntityHome and problems therein

[sjmenden]

I am creating a Help Ticketing system and I am following the SEAM documenation and making use of the EntityHome for CRUDing my Ticket Entity. The initial creation and updating works great, however when I go to view tickets, then click on a ticket which gets redirected back to my original ticket.xhtml page, with ticketId as a parameter, I can not for the life of me get the ticket to display.

I need another pair of eyes to see where I am going wrong.


ticket.xhtml

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
 xmlns:s="http://jboss.com/products/seam/taglib"
 xmlns:ui="http://java.sun.com/jsf/facelets"
 xmlns:f="http://java.sun.com/jsf/core"
 xmlns:h="http://java.sun.com/jsf/html"
 template="template.xhtml">

<ui:define name="content">

 <h1 class="center">
 <h:outputText rendered="#{!ticketHome.managed}" value="Create Ticket"/>
 <h:outputText rendered="#{ticketHome.managed}" value="Edit Ticket"/>
 </h1>

 <h:messages globalOnly="true" styleClass="message"/>

 <h:form id="createTicket">
 <f:facet name="beforeInvalidField">
 <s:message/>
 </f:facet>
 <f:facet name="afterInvalidField">
 <h:graphicImage src="img/error.gif"/>
 </f:facet>
 <f:facet name="aroundInvalidField">
 <s:span styleClass="errors"/>
 </f:facet>

 <s:validateAll>

 <table class="form-center">

 <tr>
 <td colspan="2" align="center" class="table-heading">Contact Information</td>
 </tr>
 <tr>
 <td class="name">Name</td>
 <td align="right">
 <s:decorate>
 <h:inputText id="name" required="true" value="#{ticketHome.instance.name}"/>
 </s:decorate>
 </td>
 </tr>
 <tr>
 <td>
 <span class="name">Problem Description</span>
 </td>
 <td align="right">
 <s:decorate>
 <h:inputTextarea id="problemDescription" required="true" cols="50" rows="20" value="#{ticketHome.instance.problemDescription}"/>
 </s:decorate>
 </td>
 </tr>

 <tr>
 <td></td>
 <td align="right">
 <h:commandButton value="Create Ticket" action="#{ticketHome.persist}" rendered="#{!ticketHome.managed}"/>
 <h:commandButton value="Update Ticket" action="#{ticketHome.update}" rendered="#{ticketHome.managed}"/>
 <h:commandButton value="Delete Ticket" action="#{ticketHome.remove}" rendered="#{ticketHome.managed}"/>
 <s:link id="done" value="Done" linkStyle="button" propagation="end" view="/viewTickets.xhtml"/>
 </td>
 </tr>

 </table>
 </s:validateAll>
 </h:form>

</ui:define>
</ui:composition>

Ticket.java

@Entity
@Name("ticket")
@Role(name="tempTicket", scope=ScopeType.EVENT)
@Table(name="tickets")
public class Ticket implements Serializable {

 //seam-gen attributes (you should probably edit these)
 private int id;
 private Integer version;
 private String name;


 @Id @GeneratedValue
 public int getId() {
 return id;
 }

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

 @Version
 public Integer getVersion() {
 return version;
 }

 private void setVersion(Integer version) {
 this.version = version;
 }

 @NotNull
 @Column(length=50)
 @Length(max=50)
 public String getName() {
 return name;
 }

 @Lob
 public String getProblemDescription() {
 return problemDescription;
 }

 public void setProblemDescription(String problemDescription) {
 this.problemDescription = problemDescription;
 }

}

viewTickets.xhtml

<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition 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:s="http://jboss.com/products/seam/taglib"
 xmlns:a="https://ajax4jsf.dev.java.net/ajax"
 template="template.xhtml">

 <!-- content -->
 <ui:define name="content">
 <div class="center">
 <h1>Tickets</h1>
 </div>

 <!-- Display the form for searching for tickets-->
 <s:validateAll>
 <table cellspacing="1" cellpadding="1" border="0" class="form-center">
 <tr>
 <td>
 Subject:
 </td>
 <td>
 <h:inputText value="#{tempTicket.subject}"/>
 </td>
 </tr>

 <tr>
 <td> </td>
 <td align="right">
 <h:commandButton value="Search" action="#{viewTickets.view}" styleClass="button" />
 </td>
 </tr>
 </table>
 </s:validateAll>
 <br />
 <br />

 <!-- ***************************************************************** -->
 <!-- Data Table of Tickets -->
 <!-- ***************************************************************** -->
 <h:dataTable value="#{tickets}"
 var="ticket"
 rendered="#{tickets.rowCount > 0}"
 styleClass="fiapps-table">

 <!-- Ticket Number -->
 <h:column>
 <f:facet name="header">
 <h:commandLink value="Ticket #" action="#{viewTickets.reorder}">
 <f:param name="orderBy" value="id"/>
 </h:commandLink>
 </f:facet>
 <s:link id="ticket" value="#{ticket.id}" view="/ticket.xhtml">
 <f:param name="ticketId" value="#{ticket.id}"/>
 </s:link>
 </h:column>

 <!-- Subject -->
 <h:column>
 <f:facet name="header">
 <h:commandLink value="Subject" action="#{viewTickets.reorder}">
 <f:param name="orderBy" value="subject"/>
 </h:commandLink>
 </f:facet>
 <h:outputText value="#{ticket.subject}" />
 </h:column>

 </h:dataTable>
 <br />
 <h:messages/>
 <br />
 <div class="center">
 <h:commandButton rendered="#{tickets.rowCount > 0}"
 type="submit"
 value="Refresh"
 action="#{viewTickets.findFirstPage}" />
 <h:commandButton action="#{viewTickets.findPreviousPage}"
 value="Previous Page"
 disabled="#{!viewTickets.previousPage}"
 rendered="#{tickets.rowCount > 0}"/>
 <h:commandButton action="#{viewTickets.findNextPage}"
 value="Next Page"
 disabled="#{!viewTickets.nextPage}"
 rendered="#{tickets.rowCount > 0}"/>
 </div>
 </h:form>
 <br />
 </ui:define>

</ui:composition>

when I click on the Ticket Number I get in the url bar: http://localhost:8080/fiapps/ticket.seam?ticketId=1&dataModelSelection=ticket%3Atickets%5B0%5D

so I know the ticketId is getting passed. But the ticket is not getting loaded. Here are some additional classes.



TicketHome.java

@Name("ticketHome")
public class TicketHome extends EntityHome<Ticket> {


 @Factory("ticket")
 public Ticket initPerson() {
 return getInstance();
 }

 protected Ticket createInstance() {
 Ticket ticket = new Ticket();
 return ticket;
 }

 public String getCreatedMessage() { return "New Ticket (#{ticket.subject}) created"; }
 public String getUpdatedMessage() { return "Ticket (#{ticket.subject}) updated"; }
 public String getDeletedMessage() { return "Ticket (#{ticket.subject}) deleted"; }
}

ViewTicketsBean.java - the relevant part

@Name("viewTickets")
@Stateful
@Scope(ScopeType.CONVERSATION)
public class ViewTicketsBean implements ViewTickets {

 @In(create=false, value="tempTicket") @Out(value="tempTicket")
 private Ticket tempTicket;

 @Logger
 private Log log;

 @DataModel
 private List<Ticket> tickets;

 @DataModelSelection
 private Ticket ticket;

 @In(create=true)
 private EntityManager entityManager;

...

Any help would be greatly appreciated.

[kasim]

Just reading this real fast.

Shouldnt it be "id"

not "ticketId"?

I dont see where you are telling the ticket that the name is "ticketId".

[kasim]

or rather tempTicket.Id?

[sjmenden]

I copied an example working project I created using seam gen where it generated:

<s:link id="ticket" value="#{ticket.name}" view="/ticket.xhtml">
 <f:param name="ticketId" value="#{ticket.id}"/>
</s:link>

Whereas mine looks like this, the value doesn't matter since it is for display.

<s:link id="ticket" value="#{ticket.id}" view="/ticket.xhtml">
 <f:param name="ticketId" value="#{ticket.id}"/>
</s:link>

tempTicket is only for the temporary Ticket instance for searching. In the dataTable I have tickets as my object and each individual is ticket, so ticket.id works.

The problem is when I click the link above to try to view an individual ticket, no ticket gets loaded in the background.

Honestly, it is because I don't understand the "magic" that is going on. ticketId is getting passed as a parameter, however, in the EntityHome and Home objects from Seam I can't see anywhere that it trys to read in the id or ticketId as a RequestParameter. I would really like to know how it magic is working when it works

[kasim]

Oh my bad.

I didnt see the page was loading the DataModel.

which example are you looking at btw?

On my pages i just linked back to the page itself using s:link.

[sjmenden]

Self are blind......

I am still having problems I need to work out, but I got passed my initial problem, I wasn't adding the following to my TicketHome.java

 @RequestParameter
 Long ticketId;

 @Override
 public Object getId()
 {
 if (ticketId==null)
 {
 return super.getId();
 }
 else
 {
 return ticketId;
 }
 }

 @Override @Begin
 public void create() {
 super.create();
 }

which explains where the RequestParameter definition is suppose to go.

[kasim]

Just an FYI you could also post back to your original SLSB if you used just hte s:link, and have that data populated there, and then use that to forward onto your html page as well.