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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() ;
+
+}