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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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
*
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.aai.migration;
import java.util.Optional;
import org.apache.tinkerpop.gremlin.process.traversal.P;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.onap.aai.db.props.AAIProperties;
import org.onap.aai.serialization.engines.TransactionalGraphEngine;
import org.janusgraph.core.Cardinality;
import org.janusgraph.core.PropertyKey;
import org.janusgraph.core.schema.JanusGraphManagement;
/**
* A migration template for migrating a property from one name to another
*/
@MigrationPriority(0)
@MigrationDangerRating(1)
public abstract class PropertyMigrator extends Migrator {
protected final String OLD_FIELD;
protected final String NEW_FIELD;
protected final Class<?> fieldType;
protected final Cardinality cardinality;
protected final JanusGraphManagement graphMgmt;
public PropertyMigrator(TransactionalGraphEngine engine, String oldName, String newName, Class<?> type, Cardinality cardinality) {
super(engine);
this.OLD_FIELD = oldName;
this.NEW_FIELD = newName;
this.fieldType = type;
this.cardinality = cardinality;
this.graphMgmt = engine.asAdmin().getManagementSystem();
}
/**
* Do not override this method as an inheritor of this class
*/
@Override
public void run() {
modifySchema();
executeModifyOperation();
}
protected void modifySchema() {
this.addIndex(this.addProperty());
graphMgmt.commit();
}
/**
* This is where inheritors should add their logic
*/
protected void executeModifyOperation() {
changePropertyName();
}
protected void changePropertyName() {
GraphTraversal<Vertex, Vertex> g = this.engine.asAdmin().getTraversalSource().V();
if (this.getAffectedNodeTypes().isPresent()) {
g.has(AAIProperties.NODE_TYPE, P.within(this.getAffectedNodeTypes().get()));
}
g.has(OLD_FIELD).sideEffect(t -> {
final Vertex v = t.get();
final String value = v.value(OLD_FIELD);
v.property(OLD_FIELD).remove();
v.property(NEW_FIELD, value);
this.touchVertexProperties(v, false);
}).iterate();
}
@Override
public Status getStatus() {
GraphTraversal<Vertex, Vertex> g = this.engine.asAdmin().getTraversalSource().V();
if (this.getAffectedNodeTypes().isPresent()) {
g.has(AAIProperties.NODE_TYPE, P.within(this.getAffectedNodeTypes().get()));
}
long result = g.has(OLD_FIELD).count().next();
if (result == 0) {
return Status.SUCCESS;
} else {
return Status.FAILURE;
}
}
protected Optional<PropertyKey> addProperty() {
if (!graphMgmt.containsPropertyKey(this.NEW_FIELD)) {
logger.info(" PropertyKey [" + this.NEW_FIELD + "] created in the DB. ");
return Optional.of(graphMgmt.makePropertyKey(this.NEW_FIELD).dataType(this.fieldType).cardinality(this.cardinality)
.make());
} else {
logger.info(" PropertyKey [" + this.NEW_FIELD + "] already existed in the DB. ");
return Optional.empty();
}
}
protected void addIndex(Optional<PropertyKey> key) {
if (isIndexed() && key.isPresent()) {
if (graphMgmt.containsGraphIndex(key.get().name())) {
logger.debug(" Index [" + key.get().name() + "] already existed in the DB. ");
} else {
logger.info("Add index for PropertyKey: [" + key.get().name() + "]");
graphMgmt.buildIndex(key.get().name(), Vertex.class).addKey(key.get()).buildCompositeIndex();
}
}
}
public abstract boolean isIndexed();
}
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