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PostgresNodeVersionFactory.java
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PostgresNodeVersionFactory.java
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/**
* Licensed 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 edu.berkeley.ground.api.models.postgres;
import edu.berkeley.ground.api.models.*;
import edu.berkeley.ground.api.versions.GroundType;
import edu.berkeley.ground.db.DBClient;
import edu.berkeley.ground.db.DbDataContainer;
import edu.berkeley.ground.db.PostgresClient;
import edu.berkeley.ground.db.QueryResults;
import edu.berkeley.ground.exceptions.EmptyResultException;
import edu.berkeley.ground.exceptions.GroundException;
import edu.berkeley.ground.util.IdGenerator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
public class PostgresNodeVersionFactory extends NodeVersionFactory {
private static final Logger LOGGER = LoggerFactory.getLogger(PostgresNodeVersionFactory.class);
private final PostgresClient dbClient;
private final PostgresNodeFactory nodeFactory;
private final PostgresRichVersionFactory richVersionFactory;
private final IdGenerator idGenerator;
public PostgresNodeVersionFactory(PostgresNodeFactory nodeFactory, PostgresRichVersionFactory richVersionFactory, PostgresClient dbClient, IdGenerator idGenerator) {
this.dbClient = dbClient;
this.nodeFactory = nodeFactory;
this.richVersionFactory = richVersionFactory;
this.idGenerator = idGenerator;
}
public NodeVersion create(Map<String, Tag> tags,
long structureVersionId,
String reference,
Map<String, String> referenceParameters,
long nodeId,
List<Long> parentIds) throws GroundException {
try {
long id = this.idGenerator.generateVersionId();
// add the id of the version to the tag
tags = tags.values().stream().collect(Collectors.toMap(Tag::getKey, tag -> new Tag(id, tag.getKey(), tag.getValue(), tag.getValueType())));
this.richVersionFactory.insertIntoDatabase(id, tags, structureVersionId, reference, referenceParameters);
List<DbDataContainer> insertions = new ArrayList<>();
insertions.add(new DbDataContainer("id", GroundType.LONG, id));
insertions.add(new DbDataContainer("node_id", GroundType.LONG, nodeId));
this.dbClient.insert("node_version", insertions);
this.nodeFactory.update(nodeId, id, parentIds);
this.dbClient.commit();
LOGGER.info("Created node version " + id + " in node " + nodeId + ".");
return NodeVersionFactory.construct(id, tags, structureVersionId, reference, referenceParameters, nodeId);
} catch (GroundException e) {
this.dbClient.abort();
throw e;
}
}
public NodeVersion retrieveFromDatabase(long id) throws GroundException {
try {
RichVersion version = this.richVersionFactory.retrieveFromDatabase(id);
List<DbDataContainer> predicates = new ArrayList<>();
predicates.add(new DbDataContainer("id", GroundType.LONG, id));
QueryResults resultSet;
try {
resultSet = this.dbClient.equalitySelect("node_version", DBClient.SELECT_STAR, predicates);
} catch (EmptyResultException e) {
throw new GroundException("No NodeVersion found with id " + id + ".");
}
long nodeId = resultSet.getLong(2);
this.dbClient.commit();
LOGGER.info("Retrieved node version " + id + " in node " + nodeId + ".");
return NodeVersionFactory.construct(id, version.getTags(), version.getStructureVersionId(), version.getReference(), version.getParameters(), nodeId);
} catch (GroundException e) {
this.dbClient.abort();
throw e;
}
}
public List<Long> getTransitiveClosure(long nodeVersionId) throws GroundException {
List<Long> result = this.dbClient.transitiveClosure(nodeVersionId);
this.dbClient.commit();
return result;
}
public List<Long> getAdjacentNodes(long nodeVersionId, String edgeNameRegex) throws GroundException {
List<Long> result = this.dbClient.adjacentNodes(nodeVersionId, edgeNameRegex);
this.dbClient.commit();
return result;
}
}