JPADocumentRepository.java

package pl.com.bottega.documentmanagement.infrastructure;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import pl.com.bottega.documentmanagement.api.DocumentListenerManager;
import pl.com.bottega.documentmanagement.domain.Document;
import pl.com.bottega.documentmanagement.domain.DocumentNumber;
import pl.com.bottega.documentmanagement.domain.repositories.DocumentRepository;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

/**
 * Created by maciuch on 22.06.16.
 */
@Repository
public class JPADocumentRepository implements DocumentRepository {

    @PersistenceContext
    private EntityManager entityManager;

    @Autowired
    private DocumentListenerManager documentListenerManager;

    @Override
    public void save(Document document) {
        entityManager.persist(document);
    }

    @Override
    public Document load(DocumentNumber documentNumber) {
        Document document = entityManager.createQuery("FROM Document d " +
                        "WHERE d.documentNumber = :num",
                Document.class).setParameter("num", documentNumber).getSingleResult();
        documentListenerManager.subscribeListeners(document);
        return document;
    }

}