/**
* 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 java.util.TreeMap;
import javax.persistence.EntityManager;
import javax.persistence.NoResultException;
import javax.persistence.TypedQuery;
import org.apache.ambari.server.orm.RequiresSession;
import org.apache.ambari.server.orm.entities.ArtifactEntity;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import com.google.inject.persist.Transactional;
/**
* Cluster Artifact Data Access Object.
*/
@Singleton
public class ArtifactDAO {
/**
* JPA entity manager
*/
@Inject
Provider<EntityManager> entityManagerProvider;
/**
* Find an artifact with the given name and foreign keys.
*
* @param artifactName name of artifact to find
* @param foreignKeys foreign keys of artifact as json representation of
* a map of key properties to values
*
* @return a matching artifact or null
*/
@RequiresSession
public ArtifactEntity findByNameAndForeignKeys(String artifactName, TreeMap<String, String> foreignKeys) {
//todo: need to update PK in DB
TypedQuery<ArtifactEntity> query = entityManagerProvider.get()
.createNamedQuery("artifactByNameAndForeignKeys", ArtifactEntity.class);
query.setParameter("artifactName", artifactName);
query.setParameter("foreignKeys", ArtifactEntity.serializeForeignKeys(foreignKeys));
try {
return query.getSingleResult();
} catch (NoResultException ignored) {
return null;
}
}
/**
* Find all artifacts for the specified foreign keys.
*
* @param foreignKeys foreign keys of artifact as json representation of
* a map of key properties to values
*
* @return all artifacts for the specified foreign keys or an empty List
*/
@RequiresSession
public List<ArtifactEntity> findByForeignKeys(TreeMap<String, String> foreignKeys) {
TypedQuery<ArtifactEntity> query = entityManagerProvider.get().
createNamedQuery("artifactByForeignKeys", ArtifactEntity.class);
query.setParameter("foreignKeys", ArtifactEntity.serializeForeignKeys(foreignKeys));
return query.getResultList();
}
/**
* Find all artifacts for the specified artifact name.
*
* @param artifactName name of artifact to find
* @return all artifacts with the specified artifact name or an empty List
*/
@RequiresSession
public List<ArtifactEntity> findByName(String artifactName) {
TypedQuery<ArtifactEntity> query = entityManagerProvider.get().
createNamedQuery("artifactByName", ArtifactEntity.class);
query.setParameter("artifactName", artifactName);
return query.getResultList();
}
/**
* Refresh the state of the instance from the database,
* overwriting changes made to the entity, if any.
*
* @param entity entity to refresh
*/
@Transactional
public void refresh(ArtifactEntity entity) {
entityManagerProvider.get().refresh(entity);
}
/**
* Make an instance managed and persistent.
*
* @param entity entity to persist
*/
@Transactional
public void create(ArtifactEntity entity) {
entityManagerProvider.get().persist(entity);
}
/**
* Merge the state of the given entity into the current persistence context.
*
* @param artifactEntity entity to merge
* @return the merged entity
*/
@Transactional
public ArtifactEntity merge(ArtifactEntity artifactEntity) {
return entityManagerProvider.get().merge(artifactEntity);
}
/**
* Remove the entity instance.
*
* @param artifactEntity entity to remove
*/
@Transactional
public void remove(ArtifactEntity artifactEntity) {
entityManagerProvider.get().remove(merge(artifactEntity));
}
}