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.

      Object idf = PersistenceSessionUtil.createSession();
      EntityManager session = PersistenceSessionUtil.getSession();
      EntityTransaction tx = session.getTransaction();
      tx.begin();
      
      privateMessage = session.merge(privateMessage);
      Long privateMessageId = privateMessage.getPrivateMessageFolderId();
      
      tx.commit();
      PersistenceSessionUtil.closeSession(idf);

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

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      Object idf = PersistenceSessionUtil.createSession();
      EntityManager session = PersistenceSessionUtil.getSession();
      EntityTransaction tx = session.getTransaction();
      tx.begin();
      
      userContact = session.merge(userContact);
      Long userContactId = userContact.getUserContactId();
      
      tx.commit();
      PersistenceSessionUtil.closeSession(idf);

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      Object idf = PersistenceSessionUtil.createSession();
      EntityManager session = PersistenceSessionUtil.getSession();
      EntityTransaction tx = session.getTransaction();
      tx.begin();
      
      userContact = session.merge(userContact);
      Long userContactId = userContact.getUserContactId();
      
      tx.commit();
      PersistenceSessionUtil.closeSession(idf);

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

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

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    try {
      Object idf = PersistenceSessionUtil.createSession();
      EntityManager session = PersistenceSessionUtil.getSession();
      EntityTransaction tx = session.getTransaction();
      tx.begin();
      recording = session.merge(recording);
      Long recording_id = recording.getRecording_id();
      tx.commit();
      PersistenceSessionUtil.closeSession(idf);
      return recording_id;
    } catch (Exception ex2) {

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      tx.begin();
      if (rec.getRecording_id() == null) {
        session.persist(rec);
          } else {
            if (!session.contains(rec)) {
              session.merge(rec);
          }
      }
      //session.refresh(rec);
      tx.commit();
      PersistenceSessionUtil.closeSession(idf);

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      Object idf = PersistenceSessionUtil.createSession();
      EntityManager session = PersistenceSessionUtil.getSession();
      EntityTransaction tx = session.getTransaction();
      tx.begin();
      session.flush();
      sessiondata = session.merge(sessiondata);
      session.flush();
      session.refresh(sessiondata);
      tx.commit();
      PersistenceSessionUtil.closeSession(idf);

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      Object idf = PersistenceSessionUtil.createSession();
      EntityManager session = PersistenceSessionUtil.getSession();
      EntityTransaction tx = session.getTransaction();
      tx.begin();
      
      roomStream = session.merge(roomStream);
      Long roomStreamId = roomStream.getRoomStreamId();
      
      tx.commit();
      PersistenceSessionUtil.closeSession(idf);

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