[jboss-user] [JBoss Seam] - Injection / Outjection

[mikepkp17]

I still have troubles to understand how this bijection stuff works. What I want to achieve is the following:

I have a SFSB called TestSessionBean:


  | @Scope(ScopeType.SESSION)
  | @Clustered
  | @Name("testSessionBean")
  | @Stateful
  | public class TestSessionBean implements TestSession, Serializable {
  | 
  | 	@Logger
  | 	private Log log;
  | 
  | 	private Session someSession;
  | 
  | 	private TabItem activeTab;
  | 
  | 	public TabItem getActiveTab() {
  | 		return activeTab;
  | 	}
  | 
  | 	public void setActiveTab(TabItem activeTab) {
  | 		this.activeTab = activeTab;
  | 	}
  | 
  | 	public Session getSomeSession() {
  | 		this.initSomeSession();
  | 		return this.someSession;
  | 	}
  | 
  | 	private void initSomeSession() {
  |                 ...
  | 	}
  | 
  | 	@PrePassivate
  | 	@Destroy
  | 	@Remove
  | 	public void passivate() {
  | 		if (this.someSession != null) {
  | 			this.someSession.logout();
  | 		}
  | 	}
  | 
  | 	@PostActivate
  | 	public void activate() {
  | 		this.initSomeSession();
  | 	}
  | 	
  | 	public String getHello(){
  | 		return "Hello";
  | 	}
  | 
  | }
  | 

I want to inject this TestSessionBean into another SFSB called TabBean:


  | @Stateful
  | @Scope(ScopeType.SESSION)
  | @Name("foo.bar.TabBean")
  | @Clustered
  | public class TabBean implements Tab, Serializable {
  | 
  | 	@In
  | 	public TestSession testSessionBean;
  | 
  | 	private TabItem activeTab;
  | 
  | 	private Collection<TabItem> tabs = new Vector<TabItem>();
  | 
  | 	public Collection getTabs() {
  | 		return tabs;
  | 	}
  | 
  | 	public TabItem getActiveTab() {
  | 		return activeTab;
  | 	}
  | 
  | 	public void setActiveTab(TabItem activeTab) {
  | 		this.activeTab = activeTab;
  | 		testSessionBean.setActiveTab(activeTab);
  | 	}
  | 
  | 	public void setInit(String[] tabArray) {
  | 		for (int i = 0; i < tabArray.length; i++) {
  | 			tabs.add(createTabItem(tabArray.split(";")));
  | 		}
  | 		if (tabs.size() > 0) {
  | 			activeTab = tabs.iterator().next();
  | 		}
  | 
  | 	}
  | 
  | 	private TabItem createTabItem(String[] vals) {
  | 		if (vals.length != 4) {
  | 			System.out.println("Wrong tab values inserted!");
  | 		}
  | 		return new TabItemImpl(vals[0], vals[1], vals[2], vals[3], this);
  | 	}
  | 
  | 	@Destroy
  | 	@Remove
  | 	public void destroy() {
  | 	}
  | }
  | 

The TabBean gets configured with components.xml:


  | <components>
  | 	<component name="org.jboss.seam.core.resourceBundle">
  | 		<property name = "bundleNames">
  | 			<value>bundle</value>		
  | 		</property>		
  | 	</component>
  | 
  | 	<component name="org.jboss.seam.core.init">
  | 		<property name="debug">true</property>
  | 		<property name="jndiPattern">join2learn/#{ejbName}/local</property>
  | 	</component>
  | 
  | 	<component name="org.jboss.seam.core.manager">
  | 		<!-- half second wait for conversation lock on concurrent requests -->
  | 		<property name="concurrentRequestTimeout">500</property>
  | 		<!-- 120 second conversation timeout -->
  | 		<property name="conversationTimeout">120000</property>
  | 		<property name="conversationIdParameter">cid</property>
  | 		<property name="conversationIsLongRunningParameter">
  | 			clr
  | 		</property>
  | 	</component>
  | 	
  | 	<component class="org.jboss.seam.core.Ejb"
  | 		installed="false" />
  | 
  | 	<component class="foo.bar.TabBean"
  | 		name="tabBean">
  | 		<property name="init">
  | 			<value>0;tab.startpage;tab1;startpage</value>
  | 		</property>
  | 	</component>
  | </components>
  | 

My ejb-jar.xml is the seam default one.

My problem is, that I get a NPE in TabBean if I try to invoke a method on the injected TestSessionBean and if I debug this stuff the testSessionBean variable is in fact null.

The TestSessionBean is first accessed in my index.xhtml page with the following call:


  | <h:outputLabel  value="#{testSessionBean.hello}" />
  | 

After that call I go to the debug.seam page and both the testSessionBean and the tabBean show up in the Session Context.

When I then click the link on the index page which invokes tabBean.setActiveTab(...) I get the NPE.

I also already tried all combinations of the @In Parameters which also didn't work out.

If I remove the @In and initialize testSessionBean with


  | TestSession testSessionBean = (TestSession)Component.getInstance("testSessionBean");
  | 

everything works but I suppose its not the same as with the @In annotation...

I then added this to the TabBean:


  | @In(create=true)
  | private FacesMessages facesMessages;
  | 

and also this is not injected (which should work because FacesMessages is a seam standard component, isn't it?)

I am really stuck on this one, maybe someone can point me in the right direction...


View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3997861#3997861

Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3997861