| /** |
| * 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.persist.Transactional; |
| import org.apache.ambari.server.orm.entities.HostEntity; |
| import org.apache.ambari.server.orm.entities.StageEntity; |
| |
| import javax.persistence.EntityManager; |
| import javax.persistence.NoResultException; |
| import javax.persistence.TypedQuery; |
| import java.util.Collections; |
| import java.util.List; |
| |
| public class HostDAO { |
| |
| @Inject |
| Provider<EntityManager> entityManagerProvider; |
| |
| @Transactional |
| public HostEntity findByName(String hostName) { |
| return entityManagerProvider.get().find(HostEntity.class, hostName); |
| } |
| |
| @Transactional |
| public List<HostEntity> findAll() { |
| TypedQuery<HostEntity> query = entityManagerProvider.get().createQuery("SELECT host FROM HostEntity host", HostEntity.class); |
| try { |
| return query.getResultList(); |
| } catch (NoResultException e) { |
| return Collections.emptyList(); |
| } |
| } |
| |
| @Transactional |
| public List<HostEntity> findByStage(StageEntity stageEntity) { |
| TypedQuery<HostEntity> query = entityManagerProvider.get().createQuery( |
| "SELECT DISTINCT host FROM HostEntity host JOIN host.hostRoleCommandEntities command JOIN command.stage stage " + |
| "WHERE stage=:stageEntity", HostEntity.class); |
| query.setParameter("stageEntity", stageEntity); |
| try { |
| return query.getResultList(); |
| } catch (NoResultException e) { |
| return Collections.emptyList(); |
| } |
| } |
| |
| /** |
| * Refreshes entity state from database |
| * @param hostEntity entity to refresh |
| */ |
| @Transactional |
| public void refresh(HostEntity hostEntity) { |
| entityManagerProvider.get().refresh(hostEntity); |
| } |
| |
| @Transactional |
| public void create(HostEntity hostEntity) { |
| entityManagerProvider.get().persist(hostEntity); |
| } |
| |
| @Transactional |
| public HostEntity merge(HostEntity hostEntity) { |
| return entityManagerProvider.get().merge(hostEntity); |
| } |
| |
| @Transactional |
| public void remove(HostEntity hostEntity) { |
| entityManagerProvider.get().remove(merge(hostEntity)); |
| } |
| |
| @Transactional |
| public void removeByName(String hostName) { |
| remove(findByName(hostName)); |
| } |
| |
| } |