How to find all Entities marked with @Indexed at runtime?

ebaxt · **Joined:** Fri Aug 14, 2009 9:37 am **Posts:** 3

Hi, I'm trying to find a list (List<Class<?>>) of all entities marked with @Indexed. I would like to have a "re-index" feature where all classes marked with @Indexed are re-indexed.
I found the SearchConfiguration.getClassMappings(), but haven't been able to get an instance of SearchConfiguration at runtime.
Could someone please post an example of how to get a list of indexed entities?

As a temporary solution I retrieve all entity names, an use reflection to check for @Indexed, but surly it must be a better way?

Thanks!

Erik

sanne.grinovero · **Posted:** Fri Aug 14, 2009 1:29 pm

you could try the current trunk, I've implemented that and it uses some cool performance improvements,
Not yet released, but it works like this:

Code:

FullTextSession fs = ...
fs.createIndexer(Object.class)
  .batchSizeToLoadObjects( 25 )
  .threadsToLoadObjects( 12 )
  .threadsForSubsequentFetching( 30 )
  .startAndWait();

keep in mind I'm giving you a preview; AFAIK it is fully functional but I'll rename some methods soon.

the Object.class means "reindex all objects which do subclass Object"; you could use createIndexer(User.class) to limit the indexing task to some type.
BTW if you look into the code you'll see how I retrieve the list of indexed types.

apncon · **Joined:** Sat Aug 15, 2009 9:14 am **Posts:** 1

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Cellulite

ebaxt · **Joined:** Fri Aug 14, 2009 9:37 am **Posts:** 3

s.grinovero wrote:

you could try the current trunk, I've implemented that and it uses some cool performance improvements,
Not yet released, but it works like this:

Code:

FullTextSession fs = ...
fs.createIndexer(Object.class)
  .batchSizeToLoadObjects( 25 )
  .threadsToLoadObjects( 12 )
  .threadsForSubsequentFetching( 30 )
  .startAndWait();

keep in mind I'm giving you a preview; AFAIK it is fully functional but I'll rename some methods soon.

the Object.class means "reindex all objects which do subclass Object"; you could use createIndexer(User.class) to limit the indexing task to some type.
BTW if you look into the code you'll see how I retrieve the list of indexed types.

Thanks a lot, I will give it a try!

ebaxt · **Joined:** Fri Aug 14, 2009 9:37 am **Posts:** 3

ebaxt wrote:

s.grinovero wrote:

you could try the current trunk, I've implemented that and it uses some cool performance improvements,
Not yet released, but it works like this:

Code:

FullTextSession fs = ...
fs.createIndexer(Object.class)
  .batchSizeToLoadObjects( 25 )
  .threadsToLoadObjects( 12 )
  .threadsForSubsequentFetching( 30 )
  .startAndWait();

keep in mind I'm giving you a preview; AFAIK it is fully functional but I'll rename some methods soon.

the Object.class means "reindex all objects which do subclass Object"; you could use createIndexer(User.class) to limit the indexing task to some type.
BTW if you look into the code you'll see how I retrieve the list of indexed types.

Thanks a lot, I will give it a try!

In case anyone else is looking for a way to extract all indexed classes, here is what you need from the current trunk:

Code:

   public void findAllMarkedWithIndexed() {
        SearchFactoryImplementor sfi = getSearchFactory((Session) entityManager.getDelegate());
        Set<Class<?>> indexedClazzes = toRootEntities(sfi, Object.class);
        for (Class<?> jalla : indexedClazzes) {
            System.out.println(jalla.getSimpleName());
        }
    }

    private Set<Class<?>> toRootEntities(SearchFactoryImplementor searchFactoryImplementor, Class<?>... selection) {
        Set<Class<?>> entities = new HashSet<Class<?>>();
        //first build the "entities" set containing all indexed subtypes of "selection".
        for (Class<?> entityType : selection) {
            Set<Class<?>> targetedClasses = searchFactoryImplementor.getIndexedTypesPolymorphic(new Class[]{entityType});
            if (targetedClasses.isEmpty()) {
                String msg = entityType.getName() + " is not an indexed entity or a subclass of an indexed entity";
                throw new IllegalArgumentException(msg);
            }
            entities.addAll(targetedClasses);
        }
        Set<Class<?>> cleaned = new HashSet<Class<?>>();
        Set<Class<?>> toRemove = new HashSet<Class<?>>();
        //now remove all repeated types to avoid duplicate loading by polymorphic query loading
        for (Class<?> type : entities) {
            boolean typeIsOk = true;
            for (Class<?> existing : cleaned) {
                if (existing.isAssignableFrom(type)) {
                    typeIsOk = false;
                    break;
                }
                if (type.isAssignableFrom(existing)) {
                    toRemove.add(existing);
                }
            }
            if (typeIsOk) {
                cleaned.add(type);
            }
        }
        cleaned.removeAll(toRemove);
        log.debug("Targets for indexing job: {}", cleaned);
        return cleaned;
    }

    public static SearchFactoryImplementor getSearchFactory(Session session) {
        return getSearchFactoryBySFI((SessionImplementor) session);
    }


    public static SearchFactoryImplementor getSearchFactoryBySFI(SessionImplementor session) {
        PostInsertEventListener[] listeners = session.getListeners().getPostInsertEventListeners();
        FullTextIndexEventListener listener = null;
        //FIXME this sucks since we mandante the event listener use
        for (PostInsertEventListener candidate : listeners) {
            if (candidate instanceof FullTextIndexEventListener) {
                listener = (FullTextIndexEventListener) candidate;
                break;
            }
        }
        if (listener == null) throw new HibernateException(
                "Hibernate Search Event listeners not configured, please check the reference documentation and the " +
                        "application's hibernate.cfg.xml");
        return listener.getSearchFactoryImplementor();
    }

Just to clarify, this is code from trunk written by s.grinovero, I just copied what I needed so that it works with HS-3.1.1 GA.

sanne.grinovero · **Posted:** Wed Aug 26, 2009 6:41 pm

No need to copy the whole class, this should be enough unless you need all that polymorphysm handling ;-)

Code:

Set<Class<?>> targetedClasses = searchFactoryImplementor.getIndexedTypesPolymorphic(new Class[]{Object,class});