content: /**
   * 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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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 jakarta.persistence.EntityManager;
  import jakarta.persistence.TypedQuery;
  
  import org.apache.ambari.server.orm.RequiresSession;
  import org.apache.ambari.server.orm.entities.MpackEntity;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.inject.Inject;
  import com.google.inject.Provider;
  import com.google.inject.Singleton;
  import com.google.inject.persist.Transactional;
  
  @Singleton
  public class MpackDAO {
    protected final static Logger LOG = LoggerFactory.getLogger(MpackDAO.class);
  
    /**
     * JPA entity manager
     */
    @Inject
    Provider<EntityManager> m_entityManagerProvider;
  
    /**
     * DAO utilities for dealing mostly with {@link TypedQuery} results.
     */
    @Inject
    private DaoUtils m_daoUtils;
  
    /**
     * Persists a new mpack
     */
    @Transactional
    public Long create(MpackEntity mpackEntity) {
      m_entityManagerProvider.get().persist(mpackEntity);
      return mpackEntity.getId();
    }
  
    /**
     * Gets an mpack with the specified ID.
     *
     * @param id
     *          the ID of the mpack to retrieve.
     * @return the mpack or {@code null} if none exists.
     */
    @RequiresSession
    public MpackEntity findById(long id) {
      return m_entityManagerProvider.get().find(MpackEntity.class, id);
    }
  
    /**
     * Gets mpacks with specified mpack name and mpack version.
     *
     * @param mpackName
     * @param mpackVersion
     * @return the mpack or {@code null} if none exists.
     */
    @RequiresSession
    public List<MpackEntity> findByNameVersion(String mpackName, String mpackVersion) {
      TypedQuery<MpackEntity> query = m_entityManagerProvider.get().createNamedQuery("MpackEntity.findByNameVersion", MpackEntity.class);
      query.setParameter("mpackName", mpackName);
      query.setParameter("mpackVersion", mpackVersion);
      return m_daoUtils.selectList(query);
    }
  
    /**
     * Gets all mpacks stored in the database across all clusters.
     *
     * @return all mpacks or an empty list if none exist (never {@code null}).
     */
    @RequiresSession
    public List<MpackEntity> findAll() {
      TypedQuery<MpackEntity> query = m_entityManagerProvider.get().createNamedQuery(
              "MpackEntity.findAll", MpackEntity.class);
      return m_daoUtils.selectList(query);
    }
  
    @Transactional
    public void removeById(Long id) {
      m_entityManagerProvider.get().remove(findById(id));
    }
  
  }
  