Question on Injecting

[hasc]

Hello,

i got a question on how to inject a component.

i've got a class that loads database objects.

@Stateful
@Name("ItemsCache")
public class ItemsCacheBean implements ItemsCache, Serializable {

 @PersistenceContext
 EntityManager em;

 private List<MyObjects> items;

 @Create
 public void cacheObjects() {
 items = em.createQuery("select . from Object o")
 .setHint("org.hibernate.cacheable", true)
 .getResultList();
 }

 public List<MyObjects> getItemsList(){
 return items;
 }

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

now in another bean i want to get the list of objects once, ant then serve it as listitems where the label of the displayed item depends on the locale whenever a clients requests it. i tried the following:

@Stateful
@Name("itemsmanager")
public class ItemsManagerBean implements ItemsManager, Serializable {

 @In(create=true) ItemsCache itemscache;

 @In Locale locale;

 Map<String,MyObject> objectsMap;

 public Map<String,MyObject> getObjects()
 {
 List<MyObjects> items = itemscache.getItemsList();

 String locale = this.locale.toString();

 Map<String,MyObject> results = new TreeMap<String,MyObject>();

 for (MyObject myobject: items) {
 results.put(myobject.getName(locale),myobject);
 }

 objectsMap = results;
 return objectsMap;
 }

 public Converter getConverter()
 {
 return new MyObjectsTypeConverter(itemscache.getItemsList(););
 }

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

regards,
hasc

[waynebagguley]

What's the question?

[hasc]

the question is how do i inject the list correctly.

I get the following error message:

javax.el.ELException: /showitems.xhtml @17,54 value="#{itemsmanager.objects}": javax.ejb.EJBTransactionRolledbackException: org.jboss.seam.RequiredException: In attribute requires non-null value: itemsmanager.itemscache

thanks for helping

[pmuir]

Try injecting ItemsCache not itemscache

[waynebagguley]

Ah yeah, well spotted pete.

The name of the injected field has to match the declaration in @Name

Change the code to:

@Stateful
@Name("itemsCache")
public class ItemsCacheBean implements ItemsCache, Serializable {
...
@Stateful
@Name("itemsmanager")
public class ItemsManagerBean implements ItemsManager, Serializable {

 @In(create=true) ItemsCache itemsCache;

[hasc]

eh... that was a stupid question of me.

thanks a lot for help.