index annotation with morphia does not work

Question

I'm pretty new to morphia and struggling with getting the index annotation to work. I'm creating the datasource in a static block and calling ensureIndexes in the same block, but it fails to apply the indexes. If I put the line right before I save the object it works.

By the way,I'm using playframework 2 with Java.

public class MongoService {
static private MongoClient mongoClient = null;
static Datastore ds = null;

static {
    MorphiaLoggerFactory.reset();
    MorphiaLoggerFactory.registerLogger(com.google.code.morphia.logging.slf4j.SLF4JLogrImplFactory.class);
    try {
        Logger.debug("mongo uri:" + mongoUri);
        MongoClientURI uri = new MongoClientURI(mongoUri);
        mongoClient = new MongoClient(uri);
        ds =  new Morphia().createDatastore(mongoClient, dbname);
        ds.ensureIndexes();
        ds.ensureCaps();
    }catch(Exception e) {
        Logger.error("exception:" + e.fillInStackTrace());
    }

}

public static User insertUser(User user) {
    //ds.ensureIndexes(); //UNCOMMENTING THIS LINE MAKES IT WORK
    ds.save(user);
    return user;
}

This is the implementation of the user class:

@Entity(noClassnameStored = true)
public class User {

@Id private ObjectId id;

@Indexed(value=IndexDirection.ASC, name="email", unique=true, dropDups=true) 
public String email; 
}

Answer 1

There seems to be a conflict between package loader that Morphia is using and the one that play framework is trying to use, I could not find the exact problem but as a workaround I am mapping each object one by one and that seems to be working

 morph.map(User.class);
 morph.map(Address.class);
 . 
 . 
 .