Examples of javax.persistence.EntityManager.merge()

javax.persistence.EntityManager.merge()
Merge the state of the given entity into the current persistence context. @param entity @return the instance that the state was merged to @throws IllegalStateException if this EntityManager has been closed @throws IllegalArgumentException if instance is not anentity or is a removed entity @throws TransactionRequiredException if invoked on acontainer-managed entity manager of type PersistenceContextType.TRANSACTION and there is no transaction.

          tx.begin();
          if (r.getRooms_id() == null) {
            session.persist(r);
              } else {
                if (!session.contains(r)) {
                  session.merge(r);
              }
          }
          tx.commit();
          PersistenceSessionUtil.closeSession(idf);
        }

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      tx.begin();
      if (r.getRooms_id() == null) {
        session.persist(r);
          } else {
            if (!session.contains(r)) {
              r = session.merge(r);
          }
      }
      
      session.flush();

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        tx.begin();
        if (r.getRooms_id() == null) {
          session.persist(r);
            } else {
              if (!session.contains(r)) {
                session.merge(r);
            }
        }
        tx.commit();
        PersistenceSessionUtil.closeSession(idf);

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      tx.begin();
      if (r.getRooms_id() == null) {
        session.persist(r);
          } else {
            if (!session.contains(r)) {
              session.merge(r);
          }
      }
      tx.commit();
      PersistenceSessionUtil.closeSession(idf);
      return r.getRooms_id();

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      Object idf = PersistenceSessionUtil.createSession();
      EntityManager session = PersistenceSessionUtil.getSession();
      EntityTransaction tx = session.getTransaction();
      tx.begin();
      roomClient = session.merge(roomClient);
      Long roomClientId = roomClient.getRoomClientId();
      
      tx.commit();
      PersistenceSessionUtil.closeSession(idf);

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      tx.begin();
      if (rOrg.getRooms_organisation_id() == null) {
        session.persist(rOrg);
          } else {
            if (!session.contains(rOrg)) {
              session.merge(rOrg);
          }
      }
      tx.commit();
      PersistenceSessionUtil.closeSession(idf);
      return rOrg.getRooms_organisation_id();

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      tx.begin();
      if (room.getRooms_id() == null) {
        session.persist(room);
          } else {
            if (!session.contains(room)) {
              session.merge(room);
          }
      }
      session.flush();
      session.refresh(room);
      tx.commit();

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      rModerator.setRoomId(roomId);
      Object idf = PersistenceSessionUtil.createSession();
      EntityManager session = PersistenceSessionUtil.getSession();
      EntityTransaction tx = session.getTransaction();
      tx.begin();
      rModerator = session.merge(rModerator);
      long rModeratorId = rModerator.getRoomModeratorsId();
      tx.commit();
      PersistenceSessionUtil.closeSession(idf);
      return rModeratorId;
    } catch (Exception ex2) {

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      rModerator.setStarttime(new Date());
      Object idf = PersistenceSessionUtil.createSession();
      EntityManager session = PersistenceSessionUtil.getSession();
      EntityTransaction tx = session.getTransaction();
      tx.begin();
      rModerator = session.merge(rModerator);
      long rModeratorId = rModerator.getRoomModeratorsId();
      tx.commit();
      PersistenceSessionUtil.closeSession(idf);
      return rModeratorId;
    } catch (Exception ex2) {

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      tx.begin();
      if (rModerator.getRoomModeratorsId() == 0) {
        session.persist(rModerator);
          } else {
            if (!session.contains(rModerator)) {
              session.merge(rModerator);
          }
      }
      tx.commit();
      PersistenceSessionUtil.closeSession(idf);

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