| /** |
| * 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 java.util.List; |
| |
| import javax.persistence.EntityManager; |
| import javax.persistence.NoResultException; |
| import javax.persistence.TypedQuery; |
| |
| import org.apache.ambari.server.orm.entities.ClusterConfigEntity; |
| import org.apache.ambari.server.orm.entities.ClusterEntity; |
| |
| import com.google.inject.Inject; |
| import com.google.inject.Provider; |
| import com.google.inject.persist.Transactional; |
| |
| public class ClusterDAO { |
| |
| @Inject |
| Provider<EntityManager> entityManagerProvider; |
| |
| /** |
| * Looks for Cluster by ID |
| * @param id ID of Cluster |
| * @return Found entity or NULL |
| */ |
| @Transactional |
| public ClusterEntity findById(long id) { |
| return entityManagerProvider.get().find(ClusterEntity.class, id); |
| } |
| |
| @Transactional |
| public ClusterEntity findByName(String clusterName) { |
| TypedQuery<ClusterEntity> query = entityManagerProvider.get().createNamedQuery("clusterByName", ClusterEntity.class); |
| query.setParameter("clusterName", clusterName); |
| try { |
| return query.getSingleResult(); |
| } catch (NoResultException ignored) { |
| return null; |
| } |
| } |
| |
| @Transactional |
| public List<ClusterEntity> findAll() { |
| TypedQuery<ClusterEntity> query = entityManagerProvider.get().createNamedQuery("allClusters", ClusterEntity.class); |
| try { |
| return query.getResultList(); |
| } catch (NoResultException ignored) { |
| } |
| return null; |
| } |
| |
| /** |
| * Create Cluster entity in Database |
| * @param clusterEntity entity to create |
| */ |
| @Transactional |
| public void create(ClusterEntity clusterEntity) { |
| entityManagerProvider.get().persist(clusterEntity); |
| } |
| |
| /** |
| * Creates a cluster configuration in the DB. |
| */ |
| @Transactional |
| public void createConfig(ClusterConfigEntity entity) { |
| entityManagerProvider.get().persist(entity); |
| } |
| |
| /** |
| * Retrieve entity data from DB |
| * @param clusterEntity entity to refresh |
| */ |
| @Transactional |
| public void refresh(ClusterEntity clusterEntity) { |
| entityManagerProvider.get().refresh(clusterEntity); |
| } |
| |
| @Transactional |
| public ClusterEntity merge(ClusterEntity clusterEntity) { |
| return entityManagerProvider.get().merge(clusterEntity); |
| } |
| |
| @Transactional |
| public void remove(ClusterEntity clusterEntity) { |
| entityManagerProvider.get().remove(merge(clusterEntity)); |
| } |
| |
| @Transactional |
| public void removeByName(String clusterName) { |
| remove(findByName(clusterName)); |
| } |
| |
| @Transactional |
| public void removeByPK(long id) { |
| remove(findById(id)); |
| } |
| |
| } |