IllegalStateException: No Transaction: what have I missed?
Hi,
I am maintaining someone else's code that uses JBoss Seam 1.1.0 GA. I'm just struggling with loading a DataModel: an IllegalStateException is thrown when the database query is run, stating that there is "No Transaction". I have just copied an existing, working bean so if someone could point out what I have missed, I would be grateful.
Thanks, Tim
Stack Trace....
java.lang.IllegalStateException: No transaction.
at org.jboss.tm.TxManager.setRollbackOnly(TxManager.java:751)
at org.hibernate.ejb.AbstractEntityManagerImpl.markAsRollback(AbstractEntityManagerImpl.java:392)
at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:545)
at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:567)
at org.hibernate.ejb.AbstractEntityManagerImpl.createNamedQuery(AbstractEntityManagerImpl.java:90)
at org.jboss.ejb3.entity.ExtendedEntityManager.createNamedQuery(ExtendedEntityManager.java:134)
Session Bean.....
@Stateful
@Name("blogFinder")
@Scope(ScopeType.CONVERSATION)
@TransactionAttribute(NOT_SUPPORTED)
public class BlogFinderAction implements BlogFinder, Serializable {
...
@PersistenceContext(type = EXTENDED)
private EntityManager em;
@DataModel
private List<Blog> latestBlogs;
@DataModelSelection("latestBlogs")
@Out(required = false, scope = ScopeType.CONVERSATION)
private Blog latestBlog;
@SuppressWarnings("unchecked")
@Factory("latestBlogs")
public void doBlogSearch() {
latestBlogs = null;
latestBlogs = em.createNamedQuery("blog.findAll").getResultList();
logger.debug("Retrieving articles for " + latestBlogs.size()
+ " blogs");
}... entity bean .....
@Entity
@Table(name="Blogs")
@NamedQueries(value=
{
@NamedQuery(name="findAll",
query="SELECT " +
" a " +
"FROM " +
" Blog AS a ")
}
)
public class Blog implements Serializable {
private static final Logger LOG = Logger.getLogger(Blog.class) ;
private String url;
@Id
@Column(name="URL")
@Length(min=0, max=1000, message="URL must be between 0 and 1000 characters.")
public String getUrl() {
return url ;
}
public void setUrl(String url) {
this.url = url ;
}
}.... jsf ....
<t:dataList value="#{latestBlogs}" var="blogArticle" rendered="#{not empty latestBlogs}">
article...
#{blogArticle.url}
</t:dataList>
