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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.List;
import com.google.common.collect.Multimap;
import org.javatuples.Pair;
import org.apache.tinkerpop.gremlin.structure.Edge;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.onap.aai.db.props.AAIProperties;
import org.onap.aai.edges.EdgeIngestor;
import org.onap.aai.edges.EdgeRuleQuery;
import org.onap.aai.introspection.LoaderFactory;
import org.onap.aai.serialization.db.EdgeSerializer;
import org.onap.aai.serialization.engines.TransactionalGraphEngine;
import org.onap.aai.edges.EdgeRule;
import org.onap.aai.setup.SchemaVersions;
/**
* A migration template for migrating all edge properties between "from" and "to" node from the DbedgeRules.json
*
*/
@MigrationPriority(0)
@MigrationDangerRating(1)
public abstract class EdgeMigrator extends Migrator {
private boolean success = true;
public EdgeMigrator(TransactionalGraphEngine engine, LoaderFactory loaderFactory, EdgeIngestor edgeIngestor, EdgeSerializer edgeSerializer, SchemaVersions schemaVersions) {
super(engine, loaderFactory, edgeIngestor, edgeSerializer, schemaVersions);
}
public EdgeMigrator(TransactionalGraphEngine engine, LoaderFactory loaderFactory, EdgeIngestor edgeIngestor, EdgeSerializer edgeSerializer, SchemaVersions schemaVersions, List<Pair<String, String>> nodePairList) {
super(engine, loaderFactory, edgeIngestor, edgeSerializer, schemaVersions);
}
/**
* Do not override this method as an inheritor of this class
*/
@Override
public void run() {
executeModifyOperation();
}
/**
* This is where inheritors should add their logic
*/
protected void executeModifyOperation() {
changeEdgeProperties();
}
protected void changeEdgeLabels() {
//TODO: when json file has edge label as well as edge property changes
}
protected void changeEdgeProperties() {
try {
List<Pair<String, String>> nodePairList = this.getAffectedNodePairTypes();
for (Pair<String, String> nodePair : nodePairList) {
String NODE_A = nodePair.getValue0();
String NODE_B = nodePair.getValue1();
Multimap<String, EdgeRule> result = edgeIngestor.getRules(new EdgeRuleQuery.Builder(NODE_A, NODE_B).build());
GraphTraversal<Vertex, Vertex> g = this.engine.asAdmin().getTraversalSource().V();
/*
* Find Out-Edges from Node A to Node B and change them
* Also Find Out-Edges from Node B to Node A and change them
*/
g.union(__.has(AAIProperties.NODE_TYPE, NODE_A).outE().where(__.inV().has(AAIProperties.NODE_TYPE, NODE_B)),
__.has(AAIProperties.NODE_TYPE, NODE_B).outE().where(__.inV().has(AAIProperties.NODE_TYPE, NODE_A)))
.sideEffect(t -> {
Edge e = t.get();
try {
Vertex out = e.outVertex();
Vertex in = e.inVertex();
if (out == null || in == null) {
logger.error(
e.id() + " invalid because one vertex was null: out=" + out + " in=" + in);
} else {
if (result.containsKey(e.label())) {
EdgeRule rule = result.get(e.label()).iterator().next();
e.properties().forEachRemaining(prop -> prop.remove());
edgeSerializer.addProperties(e, rule);
} else {
logger.info("found vertices connected by unkwown label: out=" + out + " label="
+ e.label() + " in=" + in);
}
}
} catch (Exception e1) {
throw new RuntimeException(e1);
}
}).iterate();
}
} catch (Exception e) {
logger.error("error encountered", e);
success = false;
}
}
@Override
public Status getStatus() {
if (success) {
return Status.SUCCESS;
} else {
return Status.FAILURE;
}
}
/**
* List of node pairs("from" and "to"), you would like EdgeMigrator to migrate from json files
* @return
*/
public abstract List<Pair<String, String>> getAffectedNodePairTypes() ;
}
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