[jboss-user] [JBoss Seam] - Re: Two browser tabs : basic question

[damianharvey]

I don't think that there's anything *wrong* with @RequestParameter, but it isn't optional so your Bean containing it must always be passed it.

Using just page params is just as easy. You would do something like this:
test.xhtml:

  | <a4j:outputPanel id="testPanel">
  | 	<h:dataTable 
  | 		id="testTable" 
  | 		var="row"
  | 		value="#{testBean.widgets}">
  | 		<h:column>
  | 			#{row.id}
  | 		</h:column>
  | 		<h:column>
  | 			<s:link 
  | 				action="#{testBean.deleteWidget}">
  | 				Normal Delete
  | 				<f:param name="id" value="#{row.id}"/>
  | 			</s:link>
  | 			<a4j:commandLink 
  | 				action="#{testBean.deleteWidget}" 
  | 				ajaxSingle="true" 
  | 				reRender="testPanel">
  | 				AJAX Delete
  | 				<f:param name="id" value="#{row.id}"/>
  | 			</a4j:commandLink>
  | 		</h:column>
  | 	</h:dataTable>
  | </a4j:outputPanel>
  | 
test.page.xml:

  | <param name="id" value="#{testBean.id}"/>
  | 
TestBean.java

  | @Name("testBean")
  | public class TestBean {
  | 	private long id;
  | 	private List<Widget> widgets = new ArrayList<Widget>
  | 	
  | 	public long getId() {
  | 		return this.id;
  | 	}
  | 	
  | 	public void setId(long id) {
  | 		this.id = id;
  | 	}
  | 	
  | 	public void deleteWidget() {
  | 		Widget widget = entityManager.find(Widget.class, this.id);
  | 		entityManager.remove(widget);
  | 		widgets.remove(widget);
  | 	}
  | 	
  | 	public List<Widget> getWidgets() {
  | 		if(this.widgets == null || this.widgets.size == 0) {
  | 			loadWidgets();
  | 		}
  | 		return this.widgets;
  | 	}
  | 	private void loadWidgets() {
  | 		this.widgets = entityManager.createQuery("select w from Widget w").getResultList();
  | 	}
  | 
Hope this helps.

Cheers,

Damian.



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