| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.ambari.server.orm.dao; |
| |
| import com.google.inject.Inject; |
| import com.google.inject.Provider; |
| import com.google.inject.Singleton; |
| import com.google.inject.persist.Transactional; |
| import org.apache.ambari.server.orm.entities.ConfigGroupEntity; |
| import javax.persistence.EntityManager; |
| import javax.persistence.NoResultException; |
| import javax.persistence.TypedQuery; |
| import java.util.List; |
| |
| @Singleton |
| public class ConfigGroupDAO { |
| @Inject |
| Provider<EntityManager> entityManagerProvider; |
| |
| // DAO methods on config group |
| |
| /** |
| * Find config group by its unique name |
| * @param groupName |
| * @return ConfigGroupEntity |
| */ |
| @Transactional |
| public ConfigGroupEntity findByName(String groupName) { |
| TypedQuery<ConfigGroupEntity> query = entityManagerProvider.get() |
| .createNamedQuery("configGroupByName", ConfigGroupEntity.class); |
| query.setParameter("groupName", groupName); |
| try { |
| return query.getSingleResult(); |
| } catch (NoResultException ignored) { |
| return null; |
| } |
| } |
| |
| /** |
| * Find config group by its id |
| * @param id |
| * @return |
| */ |
| @Transactional |
| public ConfigGroupEntity findById(Long id) { |
| return entityManagerProvider.get().find(ConfigGroupEntity.class, id); |
| } |
| |
| @Transactional |
| public List<ConfigGroupEntity> findAll() { |
| TypedQuery<ConfigGroupEntity> query = entityManagerProvider.get() |
| .createNamedQuery("allConfigGroups", ConfigGroupEntity.class); |
| try { |
| return query.getResultList(); |
| } catch (NoResultException ignored) { |
| } |
| return null; |
| } |
| |
| @Transactional |
| public void create(ConfigGroupEntity configGroupEntity) { |
| entityManagerProvider.get().persist(configGroupEntity); |
| } |
| |
| @Transactional |
| public ConfigGroupEntity merge(ConfigGroupEntity configGroupEntity) { |
| return entityManagerProvider.get().merge(configGroupEntity); |
| } |
| |
| @Transactional |
| public void remove(ConfigGroupEntity configGroupEntity) { |
| entityManagerProvider.get().remove(merge(configGroupEntity)); |
| } |
| |
| @Transactional |
| public void removeByPK(Long id) { |
| entityManagerProvider.get().remove(findById(id)); |
| } |
| |
| @Transactional |
| public void refresh(ConfigGroupEntity configGroupEntity) { |
| entityManagerProvider.get().refresh(configGroupEntity); |
| } |
| |
| // DAO methods on associated objects |
| |
| /** |
| * Find config groups by service name and so on |
| * @param tag |
| * @return |
| */ |
| @Transactional |
| public List<ConfigGroupEntity> findAllByTag(String tag) { |
| TypedQuery<ConfigGroupEntity> query = entityManagerProvider.get() |
| .createNamedQuery("configGroupsByTag", ConfigGroupEntity.class); |
| query.setParameter("tagName", tag); |
| try { |
| return query.getResultList(); |
| } catch (NoResultException ignored) { |
| } |
| return null; |
| } |
| |
| } |