catalog-dao/src/main/java/org/openecomp/sdc/be/dao/janusgraph/JanusGraphDao.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * SDC
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20 package org.openecomp.sdc.be.dao.janusgraph;
  21
  22 import static org.apache.commons.collections.CollectionUtils.isEmpty;
  23
  24 import fj.data.Either;
  25 import java.io.IOException;
  26 import java.util.ArrayList;
  27 import java.util.HashMap;
  28 import java.util.Iterator;
  29 import java.util.List;
  30 import java.util.Map;
  31 import java.util.Map.Entry;
  32 import java.util.function.Predicate;
  33 import java.util.stream.Collectors;
  34 import java.util.stream.StreamSupport;
  35 import java.util.Optional;
  36 import org.apache.commons.collections.MapUtils;
  37 import org.apache.commons.lang.StringUtils;
  38 import org.apache.commons.lang3.tuple.ImmutablePair;
  39 import org.apache.tinkerpop.gremlin.structure.Direction;
  40 import org.apache.tinkerpop.gremlin.structure.Edge;
  41 import org.apache.tinkerpop.gremlin.structure.Element;
  42 import org.apache.tinkerpop.gremlin.structure.Property;
  43 import org.apache.tinkerpop.gremlin.structure.Vertex;
  44 import org.apache.tinkerpop.gremlin.structure.util.ElementHelper;
  45 import org.janusgraph.core.JanusGraph;
  46 import org.janusgraph.core.JanusGraphEdge;
  47 import org.janusgraph.core.JanusGraphQuery;
  48 import org.janusgraph.core.JanusGraphVertex;
  49 import org.janusgraph.core.JanusGraphVertexQuery;
  50 import org.janusgraph.core.PropertyKey;
  51 import org.janusgraph.graphdb.query.JanusGraphPredicate;
  52 import org.openecomp.sdc.be.dao.jsongraph.GraphVertex;
  53 import org.openecomp.sdc.be.dao.jsongraph.types.EdgeLabelEnum;
  54 import org.openecomp.sdc.be.dao.jsongraph.types.EdgePropertyEnum;
  55 import org.openecomp.sdc.be.dao.jsongraph.types.JsonParseFlagEnum;
  56 import org.openecomp.sdc.be.dao.jsongraph.types.VertexTypeEnum;
  57 import org.openecomp.sdc.be.dao.jsongraph.utils.JsonParserUtils;
  58 import org.openecomp.sdc.be.dao.neo4j.GraphEdgeLabels;
  59 import org.openecomp.sdc.be.datatypes.enums.ComponentTypeEnum;
  60 import org.openecomp.sdc.be.datatypes.enums.GraphPropertyEnum;
  61 import org.openecomp.sdc.be.datatypes.enums.ModelTypeEnum;
  62 import org.openecomp.sdc.be.datatypes.tosca.ToscaDataDefinition;
  63 import org.openecomp.sdc.common.jsongraph.util.CommonUtility;
  64 import org.openecomp.sdc.common.jsongraph.util.CommonUtility.LogLevelEnum;
  65 import org.openecomp.sdc.common.log.enums.EcompLoggerErrorCode;
  66 import org.openecomp.sdc.common.log.wrappers.Logger;
  67 import org.springframework.beans.factory.annotation.Qualifier;
  68
  69 public class JanusGraphDao {
  70
  71     private static final Logger logger = Logger.getLogger(JanusGraphDao.class);
  72     JanusGraphClient janusGraphClient;
  73
  74     public JanusGraphDao(@Qualifier("janusgraph-client") JanusGraphClient janusGraphClient) {
  75         this.janusGraphClient = janusGraphClient;
  76         logger.info("** JanusGraphDao created");
  77     }
  78
  79     public JanusGraphOperationStatus commit() {
  80         logger.debug("#commit - The operation succeeded. Doing commit...");
  81         return janusGraphClient.commit();
  82     }
  83
  84     public JanusGraphOperationStatus rollback() {
  85         logger.debug("#rollback - The operation failed. Doing rollback...");
  86         return janusGraphClient.rollback();
  87     }
  88
  89     public Either<JanusGraph, JanusGraphOperationStatus> getGraph() {
  90         return janusGraphClient.getGraph();
  91     }
  92
  93     /**
  94      * @param graphVertex
  95      * @return
  96      */
  97     public Either<GraphVertex, JanusGraphOperationStatus> createVertex(GraphVertex graphVertex) {
  98         logger.trace("try to create vertex for ID [{}]", graphVertex.getUniqueId());
  99         Either<JanusGraph, JanusGraphOperationStatus> graph = janusGraphClient.getGraph();
 100         if (graph.isLeft()) {
 101             try {
 102                 JanusGraph tGraph = graph.left().value();
 103                 JanusGraphVertex vertex = tGraph.addVertex();
 104                 setVertexProperties(vertex, graphVertex);
 105                 graphVertex.setVertex(vertex);
 106                 return Either.left(graphVertex);
 107             } catch (Exception e) {
 108                 logger
 109                     .error(EcompLoggerErrorCode.DATA_ERROR, "JanusGraphDao", "Failed to create Node for ID '{}'", (Object) graphVertex.getUniqueId(),
 110                         e);
 111                 return Either.right(JanusGraphClient.handleJanusGraphException(e));
 112             }
 113         } else {
 114             logger.debug("Failed to create vertex for ID '{}' {}", graphVertex.getUniqueId(), graph.right().value());
 115             return Either.right(graph.right().value());
 116         }
 117     }
 118
 119     /**
 120      * @param name
 121      * @param value
 122      * @param label
 123      * @return
 124      */
 125     public Either<GraphVertex, JanusGraphOperationStatus> getVertexByPropertyAndLabel(GraphPropertyEnum name, Object value, VertexTypeEnum label) {
 126         return getVertexByPropertyAndLabel(name, value, label, JsonParseFlagEnum.ParseAll);
 127     }
 128
 129     public Either<GraphVertex, JanusGraphOperationStatus> getVertexByLabel(VertexTypeEnum label) {
 130         return janusGraphClient.getGraph().left().map(graph -> graph.query().has(GraphPropertyEnum.LABEL.getProperty(), label.getName()).vertices())
 131             .left().bind(janusGraphVertices -> getFirstFoundVertex(JsonParseFlagEnum.NoParse, janusGraphVertices));
 132     }
 133
 134     private Either<GraphVertex, JanusGraphOperationStatus> getFirstFoundVertex(JsonParseFlagEnum parseFlag, Iterable<JanusGraphVertex> vertices) {
 135         Iterator<JanusGraphVertex> iterator = vertices.iterator();
 136         if (iterator.hasNext()) {
 137             JanusGraphVertex vertex = iterator.next();
 138             GraphVertex graphVertex = createAndFill(vertex, parseFlag);
 139             return Either.left(graphVertex);
 140         }
 141         return Either.right(JanusGraphOperationStatus.NOT_FOUND);
 142     }
 143
 144     /**
 145      * @param name
 146      * @param value
 147      * @param label
 148      * @param parseFlag
 149      * @return
 150      */
 151     public Either<GraphVertex, JanusGraphOperationStatus> getVertexByPropertyAndLabel(GraphPropertyEnum name, Object value, VertexTypeEnum label,
 152                                                                                       JsonParseFlagEnum parseFlag) {
 153         Either<JanusGraph, JanusGraphOperationStatus> graph = janusGraphClient.getGraph();
 154         if (graph.isLeft()) {
 155             try {
 156                 JanusGraph tGraph = graph.left().value();
 157                 @SuppressWarnings("unchecked") Iterable<JanusGraphVertex> vertecies = tGraph.query().has(name.getProperty(), value)
 158                     .has(GraphPropertyEnum.LABEL.getProperty(), label.getName()).vertices();
 159                 java.util.Iterator<JanusGraphVertex> iterator = vertecies.iterator();
 160                 if (iterator.hasNext()) {
 161                     JanusGraphVertex vertex = iterator.next();
 162                     GraphVertex graphVertex = createAndFill(vertex, parseFlag);
 163                     return Either.left(graphVertex);
 164                 }
 165                 if (logger.isDebugEnabled()) {
 166                     logger.debug("No vertex in graph for key = {}  and value = {}   label = {}", name, value, label);
 167                 }
 168                 return Either.right(JanusGraphOperationStatus.NOT_FOUND);
 169             } catch (Exception e) {
 170                 if (logger.isDebugEnabled()) {
 171                     logger.debug("Failed to get vertex in graph for key ={} and value = {}  label = {}", name, value, label);
 172                 }
 173                 return Either.right(JanusGraphClient.handleJanusGraphException(e));
 174             }
 175         } else {
 176             if (logger.isDebugEnabled()) {
 177                 logger.debug("No vertex in graph for key ={} and value = {}  label = {} error :{}", name, value, label, graph.right().value());
 178             }
 179             return Either.right(graph.right().value());
 180         }
 181     }
 182
 183     /**
 184      * @param id
 185      * @return
 186      */
 187     public Either<GraphVertex, JanusGraphOperationStatus> getVertexById(String id) {
 188         return getVertexById(id, JsonParseFlagEnum.ParseAll);
 189     }
 190
 191     /**
 192      * @param id
 193      * @param parseFlag
 194      * @return
 195      */
 196     public Either<GraphVertex, JanusGraphOperationStatus> getVertexById(String id, JsonParseFlagEnum parseFlag) {
 197         Either<JanusGraph, JanusGraphOperationStatus> graph = janusGraphClient.getGraph();
 198         if (id == null) {
 199             if (logger.isDebugEnabled()) {
 200                 logger.debug("No vertex in graph for id = {} ", id);
 201             }
 202             return Either.right(JanusGraphOperationStatus.NOT_FOUND);
 203         }
 204         if (graph.isLeft()) {
 205             try {
 206                 JanusGraph tGraph = graph.left().value();
 207                 @SuppressWarnings("unchecked") Iterable<JanusGraphVertex> vertecies = tGraph.query()
 208                     .has(GraphPropertyEnum.UNIQUE_ID.getProperty(), id).vertices();
 209                 java.util.Iterator<JanusGraphVertex> iterator = vertecies.iterator();
 210                 if (iterator.hasNext()) {
 211                     JanusGraphVertex vertex = iterator.next();
 212                     GraphVertex graphVertex = createAndFill(vertex, parseFlag);
 213                     return Either.left(graphVertex);
 214                 } else {
 215                     if (logger.isDebugEnabled()) {
 216                         logger.debug("No vertex in graph for id = {}", id);
 217                     }
 218                     return Either.right(JanusGraphOperationStatus.NOT_FOUND);
 219                 }
 220             } catch (Exception e) {
 221                 if (logger.isDebugEnabled()) {
 222                     logger.debug("Failed to get vertex in graph for id {} ", id);
 223                 }
 224                 return Either.right(JanusGraphClient.handleJanusGraphException(e));
 225             }
 226         } else {
 227             if (logger.isDebugEnabled()) {
 228                 logger.debug("No vertex in graph for id {} error : {}", id, graph.right().value());
 229             }
 230             return Either.right(graph.right().value());
 231         }
 232     }
 233
 234     private void setVertexProperties(JanusGraphVertex vertex, GraphVertex graphVertex) throws IOException {
 235         if (graphVertex.getMetadataProperties() != null) {
 236             for (Map.Entry<GraphPropertyEnum, Object> entry : graphVertex.getMetadataProperties().entrySet()) {
 237                 if (entry.getValue() != null) {
 238                     vertex.property(entry.getKey().getProperty(), entry.getValue());
 239                 }
 240             }
 241         }
 242         vertex.property(GraphPropertyEnum.LABEL.getProperty(), graphVertex.getLabel().getName());
 243         Map<String, ? extends ToscaDataDefinition> json = graphVertex.getJson();
 244         if (json != null) {
 245             String jsonStr = JsonParserUtils.toJson(json);
 246             vertex.property(GraphPropertyEnum.JSON.getProperty(), jsonStr);
 247         }
 248         Map<String, Object> jsonMetadata = graphVertex.getMetadataJson();
 249         if (jsonMetadata != null) {
 250             String jsonMetadataStr = JsonParserUtils.toJson(jsonMetadata);
 251             vertex.property(GraphPropertyEnum.METADATA.getProperty(), jsonMetadataStr);
 252         }
 253     }
 254
 255     public void setVertexProperties(Vertex vertex, Map<String, Object> properties) throws IOException {
 256         for (Map.Entry<String, Object> entry : properties.entrySet()) {
 257             if (entry.getValue() != null) {
 258                 vertex.property(entry.getKey(), entry.getValue());
 259             }
 260         }
 261     }
 262
 263     private GraphVertex createAndFill(JanusGraphVertex vertex, JsonParseFlagEnum parseFlag) {
 264         GraphVertex graphVertex = new GraphVertex();
 265         graphVertex.setVertex(vertex);
 266         parseVertexProperties(graphVertex, parseFlag);
 267         return graphVertex;
 268     }
 269
 270     public void parseVertexProperties(GraphVertex graphVertex, JsonParseFlagEnum parseFlag) {
 271         JanusGraphVertex vertex = graphVertex.getVertex();
 272         Map<GraphPropertyEnum, Object> properties = getVertexProperties(vertex);
 273         VertexTypeEnum label = VertexTypeEnum.getByName((String) (properties.get(GraphPropertyEnum.LABEL)));
 274         for (Map.Entry<GraphPropertyEnum, Object> entry : properties.entrySet()) {
 275             GraphPropertyEnum key = entry.getKey();
 276             switch (key) {
 277                 case UNIQUE_ID:
 278                     graphVertex.setUniqueId((String) entry.getValue());
 279                     break;
 280                 case LABEL:
 281                     graphVertex.setLabel(VertexTypeEnum.getByName((String) entry.getValue()));
 282                     break;
 283                 case COMPONENT_TYPE:
 284                     String type = (String) entry.getValue();
 285                     if (type != null) {
 286                         graphVertex.setType(ComponentTypeEnum.valueOf(type));
 287                     }
 288                     break;
 289                 case JSON:
 290                     if (parseFlag == JsonParseFlagEnum.ParseAll || parseFlag == JsonParseFlagEnum.ParseJson) {
 291                         String json = (String) entry.getValue();
 292                         Map<String, ? extends ToscaDataDefinition> jsonObj = JsonParserUtils.toMap(json, label.getClassOfJson());
 293                         graphVertex.setJson(jsonObj);
 294                     }
 295                     break;
 296                 case METADATA:
 297                     if (parseFlag == JsonParseFlagEnum.ParseAll || parseFlag == JsonParseFlagEnum.ParseMetadata) {
 298                         String json = (String) entry.getValue();
 299                         Map<String, Object> metadatObj = JsonParserUtils.toMap(json);
 300                         graphVertex.setMetadataJson(metadatObj);
 301                     }
 302                     break;
 303                 default:
 304                     graphVertex.addMetadataProperty(key, entry.getValue());
 305                     break;
 306             }
 307         }
 308     }
 309
 310     public JanusGraphOperationStatus createEdge(GraphVertex from, GraphVertex to, EdgeLabelEnum label, Map<EdgePropertyEnum, Object> properties) {
 311         return createEdge(from.getVertex(), to.getVertex(), label, properties);
 312     }
 313
 314     public JanusGraphOperationStatus createEdge(Vertex from, Vertex to, EdgeLabelEnum label, Map<EdgePropertyEnum, Object> properties) {
 315         if (logger.isTraceEnabled()) {
 316             logger.trace("Try to connect {} with {} label {} properties {}",
 317                 from == null ? "NULL" : from.property(GraphPropertyEnum.UNIQUE_ID.getProperty()),
 318                 to == null ? "NULL" : to.property(GraphPropertyEnum.UNIQUE_ID.getProperty()), label, properties);
 319         }
 320         if (from == null || to == null) {
 321             logger.trace("No JanusGraph vertex for id from {} or id to {}",
 322                 from == null ? "NULL" : from.property(GraphPropertyEnum.UNIQUE_ID.getProperty()),
 323                 to == null ? "NULL" : to.property(GraphPropertyEnum.UNIQUE_ID.getProperty()));
 324             return JanusGraphOperationStatus.NOT_FOUND;
 325         }
 326         Edge edge = from.addEdge(label.name(), to);
 327         JanusGraphOperationStatus status;
 328         try {
 329             setEdgeProperties(edge, properties);
 330             status = JanusGraphOperationStatus.OK;
 331         } catch (IOException e) {
 332             logger.error(EcompLoggerErrorCode.DATA_ERROR, "JanusGraphDao", "Failed to set properties on edge  properties [{}]", properties, e);
 333             status = JanusGraphOperationStatus.GENERAL_ERROR;
 334         }
 335         return status;
 336     }
 337
 338     public Map<GraphPropertyEnum, Object> getVertexProperties(Element element) {
 339         Map<GraphPropertyEnum, Object> result = new HashMap<>();
 340         if (element != null && element.keys() != null && element.keys().size() > 0) {
 341             Map<String, Property> propertyMap = ElementHelper.propertyMap(element, element.keys().toArray(new String[element.keys().size()]));
 342             for (Entry<String, Property> entry : propertyMap.entrySet()) {
 343                 String key = entry.getKey();
 344                 Object value = entry.getValue().value();
 345                 GraphPropertyEnum valueOf = GraphPropertyEnum.getByProperty(key);
 346                 if (valueOf != null) {
 347                     result.put(valueOf, value);
 348                 }
 349             }
 350             // add print to properties that can't be converted by enum
 351         }
 352         return result;
 353     }
 354
 355     public Map<EdgePropertyEnum, Object> getEdgeProperties(Element element) {
 356         Map<EdgePropertyEnum, Object> result = new HashMap<>();
 357         if (element != null && element.keys() != null && element.keys().size() > 0) {
 358             Map<String, Property> propertyMap = ElementHelper.propertyMap(element, element.keys().toArray(new String[element.keys().size()]));
 359             for (Entry<String, Property> entry : propertyMap.entrySet()) {
 360                 String key = entry.getKey();
 361                 Object value = entry.getValue().value();
 362                 EdgePropertyEnum valueOf = EdgePropertyEnum.getByProperty(key);
 363                 if (valueOf != null) {
 364                     if (valueOf == EdgePropertyEnum.INSTANCES) {
 365                         List<String> list = JsonParserUtils.toList((String) value, String.class);
 366                         result.put(valueOf, list);
 367                     } else {
 368                         result.put(valueOf, value);
 369                     }
 370                 }
 371             }
 372         }
 373         return result;
 374     }
 375
 376     public void setEdgeProperties(Element element, Map<EdgePropertyEnum, Object> properties) throws IOException {
 377         if (properties != null && !properties.isEmpty()) {
 378             Object[] propertyKeyValues = new Object[properties.size() * 2];
 379             int i = 0;
 380             for (Entry<EdgePropertyEnum, Object> entry : properties.entrySet()) {
 381                 propertyKeyValues[i++] = entry.getKey().getProperty();
 382                 Object value = entry.getValue();
 383                 if (entry.getKey() == EdgePropertyEnum.INSTANCES) {
 384                     String jsonStr = JsonParserUtils.toJson(value);
 385                     propertyKeyValues[i++] = jsonStr;
 386                 } else {
 387                     propertyKeyValues[i++] = entry.getValue();
 388                 }
 389             }
 390             ElementHelper.attachProperties(element, propertyKeyValues);
 391         }
 392     }
 393
 394     public Either<List<GraphVertex>, JanusGraphOperationStatus> getByCriteria(VertexTypeEnum type, Map<GraphPropertyEnum, Object> props) {
 395         return getByCriteria(type, props, JsonParseFlagEnum.ParseAll);
 396     }
 397
 398     public Either<List<GraphVertex>, JanusGraphOperationStatus> getByCriteria(VertexTypeEnum type, Map<GraphPropertyEnum, Object> props,
 399                                                                               JsonParseFlagEnum parseFlag) {
 400         Either<JanusGraph, JanusGraphOperationStatus> graph = janusGraphClient.getGraph();
 401         if (graph.isLeft()) {
 402             try {
 403                 JanusGraph tGraph = graph.left().value();
 404                 JanusGraphQuery<? extends JanusGraphQuery> query = tGraph.query();
 405                 if (type != null) {
 406                     query = query.has(GraphPropertyEnum.LABEL.getProperty(), type.getName());
 407                 }
 408                 if (props != null && !props.isEmpty()) {
 409                     for (Map.Entry<GraphPropertyEnum, Object> entry : props.entrySet()) {
 410                         query = query.has(entry.getKey().getProperty(), entry.getValue());
 411                     }
 412                 }
 413                 Iterable<JanusGraphVertex> vertices = query.vertices();
 414                 if (vertices == null) {
 415                     return Either.right(JanusGraphOperationStatus.NOT_FOUND);
 416                 }
 417                 Iterator<JanusGraphVertex> iterator = vertices.iterator();
 418                 List<GraphVertex> result = new ArrayList<>();
 419                 while (iterator.hasNext()) {
 420                     JanusGraphVertex vertex = iterator.next();
 421                     Map<GraphPropertyEnum, Object> newProp = getVertexProperties(vertex);
 422                     GraphVertex graphVertex = createAndFill(vertex, parseFlag);
 423                     result.add(graphVertex);
 424                 }
 425                 if (logger.isDebugEnabled()) {
 426                     logger
 427                         .debug("Number of fetced nodes in graph for criteria : from type = {} and properties = {} is {}", type, props, result.size());
 428                 }
 429                 if (result.size() == 0) {
 430                     return Either.right(JanusGraphOperationStatus.NOT_FOUND);
 431                 }
 432                 return Either.left(result);
 433             } catch (Exception e) {
 434                 if (logger.isDebugEnabled()) {
 435                     logger.debug("Failed  get by  criteria for type = {} and properties = {}", type, props, e);
 436                 }
 437                 return Either.right(JanusGraphClient.handleJanusGraphException(e));
 438             }
 439         } else {
 440             if (logger.isDebugEnabled()) {
 441                 logger.debug("Failed  get by  criteria for type ={} and properties = {} error : {}", type, props, graph.right().value());
 442             }
 443             return Either.right(graph.right().value());
 444         }
 445     }
 446
 447     public Either<List<GraphVertex>, JanusGraphOperationStatus> getByCriteria(final VertexTypeEnum type, final Map<GraphPropertyEnum, Object> props,
 448             final Map<GraphPropertyEnum, Object> hasNotProps,
 449             final JsonParseFlagEnum parseFlag,
 450             final String model) {
 451         return getByCriteria(type, props, hasNotProps, null, parseFlag, model, false);
 452     }
 453
 454     public Either<List<GraphVertex>, JanusGraphOperationStatus> getByCriteria(final VertexTypeEnum type, final Map<GraphPropertyEnum, Object> props,
 455                                                                               final Map<GraphPropertyEnum, Object> hasNotProps,
 456                                                                               final JsonParseFlagEnum parseFlag,
 457                                                                               final String model,
 458                                                                               final boolean includeNormativeExtensionModels) {
 459         return getByCriteria(type, props, hasNotProps, null, parseFlag, model, includeNormativeExtensionModels);
 460     }
 461
 462     public Either<List<GraphVertex>, JanusGraphOperationStatus> getByCriteria(final VertexTypeEnum type,
 463             final Map<GraphPropertyEnum, Object> hasProps,
 464             final Map<GraphPropertyEnum, Object> hasNotProps,
 465             final Map<String, Entry<JanusGraphPredicate, Object>> predicates,
 466             final JsonParseFlagEnum parseFlag,
 467             final String model) {
 468         return  getByCriteria(type, hasProps, hasNotProps, predicates, parseFlag, model, false);
 469     }
 470
 471     public Either<List<GraphVertex>, JanusGraphOperationStatus> getByCriteria(final VertexTypeEnum type,
 472                                                                               final Map<GraphPropertyEnum, Object> hasProps,
 473                                                                               final Map<GraphPropertyEnum, Object> hasNotProps,
 474                                                                               final Map<String, Entry<JanusGraphPredicate, Object>> predicates,
 475                                                                               final JsonParseFlagEnum parseFlag,
 476                                                                               final String model,
 477                                                                               final boolean includeNormativeExtensionModels) {
 478         Either<JanusGraph, JanusGraphOperationStatus> graph = janusGraphClient.getGraph();
 479         if (graph.isLeft()) {
 480             try {
 481                 JanusGraph tGraph = graph.left().value();
 482                 JanusGraphQuery<? extends JanusGraphQuery> query = tGraph.query();
 483
 484                 if (type != null) {
 485                     query = query.has(GraphPropertyEnum.LABEL.getProperty(), type.getName());
 486                 }
 487                 if (hasProps != null && !hasProps.isEmpty()) {
 488                     for (Map.Entry<GraphPropertyEnum, Object> entry : hasProps.entrySet()) {
 489                         query = query.has(entry.getKey().getProperty(), entry.getValue());
 490                     }
 491                 }
 492                 if (hasNotProps != null && !hasNotProps.isEmpty()) {
 493                     for (Map.Entry<GraphPropertyEnum, Object> entry : hasNotProps.entrySet()) {
 494                         if (entry.getValue() instanceof List) {
 495                             buildMultipleNegateQueryFromList(entry, query);
 496                         } else {
 497                             query = query.hasNot(entry.getKey().getProperty(), entry.getValue());
 498                         }
 499                     }
 500                 }
 501                 if (predicates != null && !predicates.isEmpty()) {
 502                     for (Map.Entry<String, Entry<JanusGraphPredicate, Object>> entry : predicates.entrySet()) {
 503                         JanusGraphPredicate predicate = entry.getValue().getKey();
 504                         Object object = entry.getValue().getValue();
 505                         query = query.has(entry.getKey(), predicate, object);
 506                     }
 507                 }
 508                 Iterable<JanusGraphVertex> vertices = query.vertices();
 509                 if (vertices == null || !vertices.iterator().hasNext()) {
 510                     return Either.right(JanusGraphOperationStatus.NOT_FOUND);
 511                 }
 512                 List<GraphVertex> result = new ArrayList<>();
 513
 514                 final Predicate<? super JanusGraphVertex> filterPredicate = StringUtils.isEmpty(model) ? this::vertexNotConnectedToAnyModel : vertex -> vertexValidForModel(vertex, model, includeNormativeExtensionModels);
 515                 final List<JanusGraphVertex> verticesForModel = StreamSupport.stream(vertices.spliterator(), false).filter(filterPredicate).collect(Collectors.toList());
 516                 if (verticesForModel == null || verticesForModel.size() == 0) {
 517                     return Either.right(JanusGraphOperationStatus.NOT_FOUND);
 518                 }
 519
 520                 verticesForModel.forEach(vertex ->  result.add(createAndFill(vertex, parseFlag)));
 521                 if (logger.isDebugEnabled()) {
 522                     logger.debug("Number of fetched nodes in graph for criteria : from type '{}' and properties '{}' is '{}'", type, hasProps,
 523                         result.size());
 524                 }
 525                 return Either.left(result);
 526             } catch (Exception e) {
 527                 if (logger.isDebugEnabled()) {
 528                     logger.debug("Failed to get by criteria for type '{}' and properties '{}'", type, hasProps, e);
 529                 }
 530                 return Either.right(JanusGraphClient.handleJanusGraphException(e));
 531             }
 532         } else {
 533             if (logger.isDebugEnabled()) {
 534                 logger.debug("Failed to get by criteria for type '{}' and properties '{}'. Error : '{}'", type, hasProps, graph.right().value());
 535             }
 536             return Either.right(graph.right().value());
 537         }
 538     }
 539
 540     public Either<List<GraphVertex>, JanusGraphOperationStatus> getByCriteria(VertexTypeEnum type,
 541             Map<GraphPropertyEnum, Object> props, Map<GraphPropertyEnum, Object> hasNotProps,
 542             JsonParseFlagEnum parseFlag) {
 543         return getByCriteria(type, props, hasNotProps, null, parseFlag);
 544     }
 545
 546     public Either<List<GraphVertex>, JanusGraphOperationStatus> getByCriteria(final VertexTypeEnum type,
 547             final Map<GraphPropertyEnum, Object> hasProps, final Map<GraphPropertyEnum, Object> hasNotProps,
 548             final Map<String, Entry<JanusGraphPredicate, Object>> predicates, final JsonParseFlagEnum parseFlag) {
 549         Either<JanusGraph, JanusGraphOperationStatus> graph = janusGraphClient.getGraph();
 550         if (graph.isLeft()) {
 551             try {
 552                 JanusGraph tGraph = graph.left().value();
 553                 JanusGraphQuery<? extends JanusGraphQuery> query = tGraph.query();
 554
 555                 if (type != null) {
 556                     query = query.has(GraphPropertyEnum.LABEL.getProperty(), type.getName());
 557                 }
 558                 if (hasProps != null && !hasProps.isEmpty()) {
 559                     for (Map.Entry<GraphPropertyEnum, Object> entry : hasProps.entrySet()) {
 560                         query = query.has(entry.getKey().getProperty(), entry.getValue());
 561                     }
 562                 }
 563                 if (hasNotProps != null && !hasNotProps.isEmpty()) {
 564                     for (Map.Entry<GraphPropertyEnum, Object> entry : hasNotProps.entrySet()) {
 565                         if (entry.getValue() instanceof List) {
 566                             buildMultipleNegateQueryFromList(entry, query);
 567                         } else {
 568                             query = query.hasNot(entry.getKey().getProperty(), entry.getValue());
 569                         }
 570                     }
 571                 }
 572                 if (predicates != null && !predicates.isEmpty()) {
 573                     for (Map.Entry<String, Entry<JanusGraphPredicate, Object>> entry : predicates.entrySet()) {
 574                         JanusGraphPredicate predicate = entry.getValue().getKey();
 575                         Object object = entry.getValue().getValue();
 576                         query = query.has(entry.getKey(), predicate, object);
 577                     }
 578                 }
 579                 Iterable<JanusGraphVertex> vertices = query.vertices();
 580                 if (vertices == null || !vertices.iterator().hasNext()) {
 581                     return Either.right(JanusGraphOperationStatus.NOT_FOUND);
 582                 }
 583                 List<GraphVertex> result = new ArrayList<>();
 584
 585                 vertices.forEach(vertex -> result.add(createAndFill(vertex, parseFlag)));
 586                 if (logger.isDebugEnabled()) {
 587                     logger.debug(
 588                             "Number of fetched nodes in graph for criteria : from type '{}' and properties '{}' is '{}'",
 589                             type, hasProps, result.size());
 590                 }
 591                 return Either.left(result);
 592             } catch (Exception e) {
 593                 if (logger.isDebugEnabled()) {
 594                     logger.debug("Failed to get by criteria for type '{}' and properties '{}'", type, hasProps, e);
 595                 }
 596                 return Either.right(JanusGraphClient.handleJanusGraphException(e));
 597             }
 598         } else {
 599             if (logger.isDebugEnabled()) {
 600                 logger.debug("Failed to get by criteria for type '{}' and properties '{}'. Error : '{}'", type,
 601                         hasProps, graph.right().value());
 602             }
 603             return Either.right(graph.right().value());
 604         }
 605     }
 606
 607     private boolean vertexValidForModel(final JanusGraphVertex vertex, final String model, final boolean includeNormativeExtensions) {
 608         final String vertexLabel = (String)vertex.property(GraphPropertyEnum.LABEL.getProperty()).value();
 609         final VertexTypeEnum vertexType = VertexTypeEnum.getByName(vertexLabel);
 610         final GraphEdgeLabels edgeLabel = vertexType.equals(VertexTypeEnum.TOPOLOGY_TEMPLATE) ? GraphEdgeLabels.MODEL : GraphEdgeLabels.MODEL_ELEMENT;
 611         final Either<List<ImmutablePair<JanusGraphVertex, Edge>>, JanusGraphOperationStatus> modelVertices = getParentVerticies(vertex, edgeLabel);
 612
 613         return modelVertices.isLeft() && modelVertices.left().value().stream().anyMatch(vertexPair -> modelVertexMatchesModel(vertexPair.getLeft(), model, includeNormativeExtensions));
 614     }
 615
 616     private boolean modelVertexMatchesModel(final JanusGraphVertex modelVertex, final String model, final boolean includeNormativeExtensions) {
 617         if (model.equals((String)modelVertex.property("name").value())) {
 618             return true;
 619         }
 620         final Either<List<ImmutablePair<JanusGraphVertex, Edge>>, JanusGraphOperationStatus> derivedModels =
 621                         getParentVerticies(modelVertex, GraphEdgeLabels.DERIVED_FROM);
 622         if (derivedModels.isLeft() && derivedModels.left().value().stream().anyMatch(derivedModel ->modelVertexMatchesModel(derivedModel.left, model, includeNormativeExtensions))) {
 623             return true;
 624         }
 625
 626         if (includeNormativeExtensions && isANormativeExtension(modelVertex)) {
 627             final Either<List<Vertex>,JanusGraphOperationStatus> derivedFromModels =
 628                     getChildrenVertices(modelVertex, EdgeLabelEnum.DERIVED_FROM, JsonParseFlagEnum.ParseAll);
 629             return derivedFromModels.isLeft() && derivedFromModels.left().value().stream().anyMatch(derivedFromModel -> model.equals((String)derivedFromModel.property("name").value()));
 630         }
 631         return false;
 632     }
 633
 634     private boolean isANormativeExtension(final JanusGraphVertex modelVertex) {
 635         return ModelTypeEnum.NORMATIVE_EXTENSION.getValue().equals((String)modelVertex.property(GraphPropertyEnum.MODEL_TYPE.getProperty()).value());
 636     }
 637
 638     private Either<List<ImmutablePair<JanusGraphVertex, Edge>>, JanusGraphOperationStatus> getParentVerticies(
 639             final JanusGraphVertex rootVertex, final GraphEdgeLabels edgeType) {
 640         return getEdgeVerticies(rootVertex, Direction.IN, edgeType);
 641     }
 642
 643     private Either<List<ImmutablePair<JanusGraphVertex, Edge>>, JanusGraphOperationStatus> getEdgeVerticies(
 644             final JanusGraphVertex rootVertex, final Direction direction, final GraphEdgeLabels edgeType) {
 645         final List<ImmutablePair<JanusGraphVertex, Edge>> immutablePairs = new ArrayList<>();
 646         final Iterator<Edge> edgesCreatorIterator = rootVertex.edges(direction, edgeType.getProperty());
 647         if (edgesCreatorIterator != null) {
 648             while (edgesCreatorIterator.hasNext()) {
 649                 Edge edge = edgesCreatorIterator.next();
 650                 JanusGraphVertex vertex = Direction.OUT.equals(direction)? (JanusGraphVertex) edge.inVertex() : (JanusGraphVertex) edge.outVertex();
 651                 ImmutablePair<JanusGraphVertex, Edge> immutablePair = new ImmutablePair<>(vertex, edge);
 652                 immutablePairs.add(immutablePair);
 653             }
 654         }
 655         if (immutablePairs.isEmpty()) {
 656             return Either.right(JanusGraphOperationStatus.NOT_FOUND);
 657         }
 658         return Either.left(immutablePairs);
 659     }
 660
 661     private boolean vertexNotConnectedToAnyModel(final JanusGraphVertex vertex) {
 662         String vt = (String)vertex.property(GraphPropertyEnum.LABEL.getProperty()).value();
 663         VertexTypeEnum vertexType = VertexTypeEnum.getByName(vt);
 664         EdgeLabelEnum edgeLabel = vertexType.equals(VertexTypeEnum.TOPOLOGY_TEMPLATE) ? EdgeLabelEnum.MODEL : EdgeLabelEnum.MODEL_ELEMENT;
 665         return !vertex.edges(Direction.IN, edgeLabel.name()).hasNext();
 666     }
 667
 668     public Either<Iterator<Vertex>, JanusGraphOperationStatus> getCatalogOrArchiveVerticies(boolean isCatalog) {
 669         Either<JanusGraph, JanusGraphOperationStatus> graph = janusGraphClient.getGraph();
 670         if (graph.isLeft()) {
 671             try {
 672                 JanusGraph tGraph = graph.left().value();
 673                 String name = isCatalog ? VertexTypeEnum.CATALOG_ROOT.getName() : VertexTypeEnum.ARCHIVE_ROOT.getName();
 674                 Iterable<JanusGraphVertex> vCatalogIter = tGraph.query().has(GraphPropertyEnum.LABEL.getProperty(), name).vertices();
 675                 if (vCatalogIter == null) {
 676                     logger.debug("Failed to fetch catalog vertex");
 677                     return Either.right(JanusGraphOperationStatus.GENERAL_ERROR);
 678                 }
 679                 JanusGraphVertex catalogV = vCatalogIter.iterator().next();
 680                 if (catalogV == null) {
 681                     logger.debug("Failed to fetch catalog vertex");
 682                     return Either.right(JanusGraphOperationStatus.GENERAL_ERROR);
 683                 }
 684                 String edgeLabel = isCatalog ? EdgeLabelEnum.CATALOG_ELEMENT.name() : EdgeLabelEnum.ARCHIVE_ELEMENT.name();
 685                 Iterator<Vertex> vertices = catalogV.vertices(Direction.OUT, edgeLabel);
 686                 return Either.left(vertices);
 687             } catch (Exception e) {
 688                 if (logger.isDebugEnabled()) {
 689                     logger.debug("Failed  get by  criteria: ", e);
 690                 }
 691                 return Either.right(JanusGraphClient.handleJanusGraphException(e));
 692             }
 693         } else {
 694             if (logger.isDebugEnabled()) {
 695                 logger.debug("Failed  get by  criteria : ", graph.right().value());
 696             }
 697             return Either.right(graph.right().value());
 698         }
 699     }
 700
 701     private void buildMultipleNegateQueryFromList(Map.Entry<GraphPropertyEnum, Object> entry, JanusGraphQuery query) {
 702         List<Object> negateList = (List<Object>) entry.getValue();
 703         for (Object listItem : negateList) {
 704             query.hasNot(entry.getKey().getProperty(), listItem);
 705         }
 706     }
 707
 708     /**
 709      * @param parentVertex
 710      * @param edgeLabel
 711      * @param parseFlag
 712      * @return
 713      */
 714     public Either<GraphVertex, JanusGraphOperationStatus> getChildVertex(GraphVertex parentVertex, EdgeLabelEnum edgeLabel,
 715                                                                          JsonParseFlagEnum parseFlag) {
 716         Either<List<GraphVertex>, JanusGraphOperationStatus> childrenVertecies = getChildrenVertices(parentVertex, edgeLabel, parseFlag);
 717         if (childrenVertecies.isRight()) {
 718             return Either.right(childrenVertecies.right().value());
 719         }
 720         return Either.left(childrenVertecies.left().value().get(0));
 721     }
 722
 723     /**
 724      * @param parentVertex
 725      * @param edgeLabel
 726      * @param parseFlag
 727      * @return
 728      */
 729     public Either<Vertex, JanusGraphOperationStatus> getChildVertex(Vertex parentVertex, EdgeLabelEnum edgeLabel, JsonParseFlagEnum parseFlag) {
 730         Either<List<Vertex>, JanusGraphOperationStatus> childrenVertecies = getChildrenVertices(parentVertex, edgeLabel, parseFlag);
 731         if (childrenVertecies.isRight()) {
 732             return Either.right(childrenVertecies.right().value());
 733         }
 734         return Either.left(childrenVertecies.left().value().get(0));
 735     }
 736
 737     public Either<GraphVertex, JanusGraphOperationStatus> getParentVertex(GraphVertex parentVertex, EdgeLabelEnum edgeLabel,
 738                                                                           JsonParseFlagEnum parseFlag) {
 739         Either<List<GraphVertex>, JanusGraphOperationStatus> childrenVertecies = getParentVertices(parentVertex, edgeLabel, parseFlag);
 740         if (childrenVertecies.isRight()) {
 741             return Either.right(childrenVertecies.right().value());
 742         }
 743         if (isEmpty(childrenVertecies.left().value())) {
 744             return Either.right(JanusGraphOperationStatus.NOT_FOUND);
 745         }
 746         return Either.left(childrenVertecies.left().value().get(0));
 747     }
 748
 749     public Either<Vertex, JanusGraphOperationStatus> getParentVertex(Vertex parentVertex, EdgeLabelEnum edgeLabel, JsonParseFlagEnum parseFlag) {
 750         Either<List<Vertex>, JanusGraphOperationStatus> childrenVertecies = getParentVertices(parentVertex, edgeLabel, parseFlag);
 751         if (childrenVertecies.isRight()) {
 752             return Either.right(childrenVertecies.right().value());
 753         }
 754         if (isEmpty(childrenVertecies.left().value())) {
 755             return Either.right(JanusGraphOperationStatus.NOT_FOUND);
 756         }
 757         return Either.left(childrenVertecies.left().value().get(0));
 758     }
 759
 760     /**
 761      * @param parentVertex
 762      * @param edgeLabel
 763      * @param parseFlag
 764      * @return
 765      */
 766     public Either<List<GraphVertex>, JanusGraphOperationStatus> getChildrenVertices(GraphVertex parentVertex, EdgeLabelEnum edgeLabel,
 767                                                                                     JsonParseFlagEnum parseFlag) {
 768         return getAdjacentVertices(parentVertex, edgeLabel, parseFlag, Direction.OUT);
 769     }
 770
 771     public Either<List<GraphVertex>, JanusGraphOperationStatus> getParentVertices(GraphVertex parentVertex, EdgeLabelEnum edgeLabel,
 772                                                                                   JsonParseFlagEnum parseFlag) {
 773         return getAdjacentVertices(parentVertex, edgeLabel, parseFlag, Direction.IN);
 774     }
 775
 776     public Either<List<Vertex>, JanusGraphOperationStatus> getParentVertices(Vertex parentVertex, EdgeLabelEnum edgeLabel,
 777                                                                              JsonParseFlagEnum parseFlag) {
 778         return getAdjacentVertices(parentVertex, edgeLabel, parseFlag, Direction.IN);
 779     }
 780
 781     private Either<List<Vertex>, JanusGraphOperationStatus> getAdjacentVertices(Vertex parentVertex, EdgeLabelEnum edgeLabel,
 782                                                                                 JsonParseFlagEnum parseFlag, Direction direction) {
 783         List<Vertex> list = new ArrayList<>();
 784         try {
 785             Either<JanusGraph, JanusGraphOperationStatus> graphRes = janusGraphClient.getGraph();
 786             if (graphRes.isRight()) {
 787                 logger.error("Failed to retrieve graph. status is {}", graphRes);
 788                 return Either.right(graphRes.right().value());
 789             }
 790             Iterator<Edge> edgesCreatorIterator = parentVertex.edges(direction, edgeLabel.name());
 791             if (edgesCreatorIterator != null) {
 792                 while (edgesCreatorIterator.hasNext()) {
 793                     Edge edge = edgesCreatorIterator.next();
 794                     JanusGraphVertex vertex;
 795                     if (direction == Direction.IN) {
 796                         vertex = (JanusGraphVertex) edge.outVertex();
 797                     } else {
 798                         vertex = (JanusGraphVertex) edge.inVertex();
 799                     }
 800                     // GraphVertex graphVertex = createAndFill(vertex, parseFlag);
 801                     list.add(vertex);
 802                 }
 803             }
 804             if (list.isEmpty()) {
 805                 return Either.right(JanusGraphOperationStatus.NOT_FOUND);
 806             }
 807         } catch (Exception e) {
 808             logger.error("Failed to perform graph operation ", e);
 809             Either.right(JanusGraphClient.handleJanusGraphException(e));
 810         }
 811         return Either.left(list);
 812     }
 813
 814     /**
 815      * @param parentVertex
 816      * @param edgeLabel
 817      * @param parseFlag
 818      * @return
 819      */
 820     public Either<List<Vertex>, JanusGraphOperationStatus> getChildrenVertices(Vertex parentVertex, EdgeLabelEnum edgeLabel,
 821                                                                                JsonParseFlagEnum parseFlag) {
 822         return getAdjacentVertices(parentVertex, edgeLabel, parseFlag, Direction.OUT);
 823     }
 824
 825     private Either<List<GraphVertex>, JanusGraphOperationStatus> getAdjacentVertices(GraphVertex parentVertex, EdgeLabelEnum edgeLabel,
 826                                                                                      JsonParseFlagEnum parseFlag, Direction direction) {
 827         List<GraphVertex> list = new ArrayList<>();
 828         Either<List<Vertex>, JanusGraphOperationStatus> adjacentVerticies = getAdjacentVertices(parentVertex.getVertex(), edgeLabel, parseFlag,
 829             direction);
 830         if (adjacentVerticies.isRight()) {
 831             return Either.right(adjacentVerticies.right().value());
 832         }
 833         adjacentVerticies.left().value().stream().forEach(vertex -> {
 834             list.add(createAndFill((JanusGraphVertex) vertex, parseFlag));
 835         });
 836         return Either.left(list);
 837     }
 838
 839     /**
 840      * Searches Edge by received label and criteria
 841      *
 842      * @param vertex
 843      * @param label
 844      * @param properties
 845      * @return found edge or JanusGraphOperationStatus
 846      */
 847     public Either<Edge, JanusGraphOperationStatus> getBelongingEdgeByCriteria(GraphVertex vertex, EdgeLabelEnum label,
 848                                                                               Map<GraphPropertyEnum, Object> properties) {
 849         Either<Edge, JanusGraphOperationStatus> result = null;
 850         Edge matchingEdge = null;
 851         String notFoundMsg = "No edges in graph for criteria";
 852         try {
 853             JanusGraphVertexQuery<?> query = vertex.getVertex().query().labels(label.name());
 854             if (properties != null && !properties.isEmpty()) {
 855                 for (Map.Entry<GraphPropertyEnum, Object> entry : properties.entrySet()) {
 856                     query = query.has(entry.getKey().getProperty(), entry.getValue());
 857                 }
 858             }
 859             Iterable<JanusGraphEdge> edges = query.edges();
 860             if (edges == null) {
 861                 CommonUtility.addRecordToLog(logger, LogLevelEnum.DEBUG, notFoundMsg);
 862                 result = Either.right(JanusGraphOperationStatus.NOT_FOUND);
 863             } else {
 864                 Iterator<JanusGraphEdge> eIter = edges.iterator();
 865                 if (eIter.hasNext()) {
 866                     matchingEdge = eIter.next();
 867                 } else {
 868                     CommonUtility.addRecordToLog(logger, LogLevelEnum.DEBUG, notFoundMsg);
 869                     result = Either.right(JanusGraphOperationStatus.NOT_FOUND);
 870                 }
 871             }
 872             if (result == null) {
 873                 result = Either.left(matchingEdge);
 874             }
 875         } catch (Exception e) {
 876             CommonUtility.addRecordToLog(logger, LogLevelEnum.DEBUG, "Exception occured during getting edge by criteria for component with id {}. {}",
 877                 vertex.getUniqueId(), e);
 878             return Either.right(JanusGraphClient.handleJanusGraphException(e));
 879         }
 880         return result;
 881     }
 882
 883     public Either<Edge, JanusGraphOperationStatus> getEdgeByChildrenVertexProperties(GraphVertex vertex, EdgeLabelEnum label,
 884                                                                                      Map<GraphPropertyEnum, Object> properties) {
 885         Either<Edge, JanusGraphOperationStatus> result = null;
 886         Edge matchingEdge = null;
 887         String notFoundMsg = "No edges in graph for criteria";
 888         try {
 889             Iterator<Edge> edges = vertex.getVertex().edges(Direction.OUT, label.name());
 890             while (edges.hasNext()) {
 891                 matchingEdge = edges.next();
 892                 Vertex childV = matchingEdge.inVertex();
 893                 Map<GraphPropertyEnum, Object> vertexProperties = getVertexProperties(childV);
 894                 Optional<Entry<GraphPropertyEnum, Object>> findNotMatch = properties.entrySet().stream()
 895                     .filter(e -> vertexProperties.get(e.getKey()) == null || !vertexProperties.get(e.getKey()).equals(e.getValue())).findFirst();
 896                 if (!findNotMatch.isPresent()) {
 897                     result = Either.left(matchingEdge);
 898                 }
 899             }
 900             if (result == null) {
 901                 //no match
 902                 CommonUtility.addRecordToLog(logger, LogLevelEnum.DEBUG, notFoundMsg);
 903                 result = Either.right(JanusGraphOperationStatus.NOT_FOUND);
 904             }
 905         } catch (Exception e) {
 906             CommonUtility.addRecordToLog(logger, LogLevelEnum.DEBUG, "Exception occured during getting edge by criteria for component with id {}. {}",
 907                 vertex.getUniqueId(), e);
 908             return Either.right(JanusGraphClient.handleJanusGraphException(e));
 909         }
 910         return result;
 911     }
 912
 913     /**
 914      * Deletes Edge by received label and criteria
 915      *
 916      * @param vertex
 917      * @param label
 918      * @param properties
 919      * @return
 920      */
 921     public Either<Edge, JanusGraphOperationStatus> deleteBelongingEdgeByCriteria(GraphVertex vertex, EdgeLabelEnum label,
 922                                                                                  Map<GraphPropertyEnum, Object> properties) {
 923         Either<Edge, JanusGraphOperationStatus> result = null;
 924         try {
 925             result = getBelongingEdgeByCriteria(vertex, label, properties);
 926             if (result.isLeft()) {
 927                 Edge edge = result.left().value();
 928                 CommonUtility
 929                     .addRecordToLog(logger, LogLevelEnum.TRACE, "Going to delete an edge with the label {} belonging to the vertex {} ", label.name(),
 930                         vertex.getUniqueId());
 931                 edge.remove();
 932                 result = Either.left(edge);
 933             } else {
 934                 CommonUtility
 935                     .addRecordToLog(logger, LogLevelEnum.DEBUG, "Failed to find an edge with the label {} belonging to the vertex {} ", label.name(),
 936                         vertex.getUniqueId());
 937             }
 938         } catch (Exception e) {
 939             CommonUtility
 940                 .addRecordToLog(logger, LogLevelEnum.DEBUG, "Exception occured during deleting an edge by criteria for the component with id {}. {}",
 941                     vertex == null ? "NULL" : vertex.getUniqueId(), e);
 942             return Either.right(JanusGraphClient.handleJanusGraphException(e));
 943         }
 944         return result;
 945     }
 946
 947     @SuppressWarnings("unchecked")
 948     /**
 949      * Deletes an edge between vertices fromVertex and toVertex according to received label
 950      *
 951      * @param fromVertex
 952      * @param toVertex
 953      * @param label
 954      * @return
 955      */
 956     public Either<Edge, JanusGraphOperationStatus> deleteEdge(GraphVertex fromVertex, GraphVertex toVertex, EdgeLabelEnum label) {
 957         return deleteEdge(fromVertex.getVertex(), toVertex.getVertex(), label, fromVertex.getUniqueId(), toVertex.getUniqueId(), false);
 958     }
 959
 960     public Either<Edge, JanusGraphOperationStatus> deleteAllEdges(GraphVertex fromVertex, GraphVertex toVertex, EdgeLabelEnum label) {
 961         return deleteEdge(fromVertex.getVertex(), toVertex.getVertex(), label, fromVertex.getUniqueId(), toVertex.getUniqueId(), true);
 962     }
 963
 964     public Either<Edge, JanusGraphOperationStatus> deleteEdge(JanusGraphVertex fromVertex, JanusGraphVertex toVertex, EdgeLabelEnum label,
 965                                                               String uniqueIdFrom, String uniqueIdTo, boolean deleteAll) {
 966         Either<Edge, JanusGraphOperationStatus> result = null;
 967         Vertex problemV = null;
 968         try {
 969             Iterable<JanusGraphEdge> edges = fromVertex.query().labels(label.name()).edges();
 970             Iterator<JanusGraphEdge> eIter = edges.iterator();
 971             while (eIter.hasNext()) {
 972                 Edge edge = eIter.next();
 973                 problemV = edge.inVertex();
 974                 String currVertexUniqueId = null;
 975                 try {
 976                     currVertexUniqueId = edge.inVertex().value(GraphPropertyEnum.UNIQUE_ID.getProperty());
 977                 } catch (Exception e) {
 978                     // AutoHealing procedure
 979                     logger.info("Corrupted vertex and edge were found and deleted {}", e);
 980                     if (problemV != null) {
 981                         Map<GraphPropertyEnum, Object> props = getVertexProperties(problemV);
 982                         logger.debug("problematic Vertex properties:");
 983                         logger.debug("props size: {}", props.size());
 984                         for (Map.Entry<GraphPropertyEnum, Object> entry : props.entrySet()) {
 985                             logger.debug("{}{}", entry.getKey() + ":" + entry.getValue());
 986                         }
 987                         Either<List<Vertex>, JanusGraphOperationStatus> childrenVertices = getChildrenVertices(problemV, EdgeLabelEnum.VERSION,
 988                             JsonParseFlagEnum.NoParse);
 989                         if (childrenVertices.isLeft()) {
 990                             childrenVertices.left().value().size();
 991                             logger.debug("number of children that problematic Vertex has: {}", props.size());
 992                         }
 993                         try {
 994                             edge.remove();
 995                         } catch (Exception e1) {
 996                             logger.debug("failed to remove problematic edge. {}", e1);
 997                         }
 998                         try {
 999                             problemV.remove();
1000                         } catch (Exception e2) {
1001                             logger.debug("failed to remove problematic vertex . {}", e2);
1002                         }
1003                     }
1004                     continue;
1005                 }
1006                 if (currVertexUniqueId != null && currVertexUniqueId.equals(uniqueIdTo)) {
1007                     CommonUtility.addRecordToLog(logger, LogLevelEnum.TRACE, "Going to delete an edge with the label {} between vertices {} and {}. ",
1008                         label.name(), uniqueIdFrom, uniqueIdTo);
1009                     edge.remove();
1010                     result = Either.left(edge);
1011                     if (!deleteAll) {
1012                         break;
1013                     }
1014                 }
1015             }
1016             if (result == null) {
1017                 CommonUtility.addRecordToLog(logger, LogLevelEnum.DEBUG, "Failed to delete an edge with the label {} between vertices {} and {}. ",
1018                     label.name(), uniqueIdFrom, uniqueIdTo);
1019                 result = Either.right(JanusGraphOperationStatus.NOT_FOUND);
1020             }
1021         } catch (Exception e) {
1022             CommonUtility.addRecordToLog(logger, LogLevelEnum.DEBUG,
1023                 "Exception occured during deleting an edge with the label {} between vertices {} and {}. {}", label.name(), uniqueIdFrom, uniqueIdTo,
1024                 e);
1025             return Either.right(JanusGraphClient.handleJanusGraphException(e));
1026         }
1027         return result;
1028     }
1029
1030     public JanusGraphOperationStatus deleteEdgeByDirection(GraphVertex fromVertex, Direction direction, EdgeLabelEnum label) {
1031         try {
1032             Iterator<Edge> edges = fromVertex.getVertex().edges(direction, label.name());
1033             while (edges.hasNext()) {
1034                 Edge edge = edges.next();
1035                 edge.remove();
1036             }
1037         } catch (Exception e) {
1038             logger.debug("Failed to remove from vertex {} edges {} by direction {} ", fromVertex.getUniqueId(), label, direction, e);
1039             return JanusGraphClient.handleJanusGraphException(e);
1040         }
1041         return JanusGraphOperationStatus.OK;
1042     }
1043
1044     /**
1045      * Updates vertex properties. Note that graphVertex argument should contain updated data
1046      *
1047      * @param graphVertex
1048      * @return
1049      */
1050     public Either<GraphVertex, JanusGraphOperationStatus> updateVertex(GraphVertex graphVertex) {
1051         CommonUtility.addRecordToLog(logger, LogLevelEnum.TRACE, "Going to update metadata of vertex with uniqueId {}. ", graphVertex.getUniqueId());
1052         try {
1053             graphVertex.updateMetadataJsonWithCurrentMetadataProperties();
1054             setVertexProperties(graphVertex.getVertex(), graphVertex);
1055         } catch (Exception e) {
1056             CommonUtility
1057                 .addRecordToLog(logger, LogLevelEnum.DEBUG, "Failed to update metadata of vertex with uniqueId {}. ", graphVertex.getUniqueId(), e);
1058             return Either.right(JanusGraphClient.handleJanusGraphException(e));
1059         }
1060         return Either.left(graphVertex);
1061     }
1062
1063     /**
1064      * Fetches vertices by uniqueId according to received parse flag
1065      *
1066      * @param verticesToGet
1067      * @return
1068      */
1069     public Either<Map<String, GraphVertex>, JanusGraphOperationStatus> getVerticesByUniqueIdAndParseFlag(
1070         Map<String, ImmutablePair<GraphPropertyEnum, JsonParseFlagEnum>> verticesToGet) {
1071         Either<Map<String, GraphVertex>, JanusGraphOperationStatus> result = null;
1072         Map<String, GraphVertex> vertices = new HashMap<>();
1073         JanusGraphOperationStatus titatStatus;
1074         Either<GraphVertex, JanusGraphOperationStatus> getVertexRes = null;
1075         for (Map.Entry<String, ImmutablePair<GraphPropertyEnum, JsonParseFlagEnum>> entry : verticesToGet.entrySet()) {
1076             if (entry.getValue().getKey() == GraphPropertyEnum.UNIQUE_ID) {
1077                 getVertexRes = getVertexById(entry.getKey(), entry.getValue().getValue());
1078             } else if (entry.getValue().getKey() == GraphPropertyEnum.USERID) {
1079                 getVertexRes = getVertexByPropertyAndLabel(entry.getValue().getKey(), entry.getKey(), VertexTypeEnum.USER,
1080                     entry.getValue().getValue());
1081             }
1082             if (getVertexRes == null) {
1083                 titatStatus = JanusGraphOperationStatus.ILLEGAL_ARGUMENT;
1084                 CommonUtility
1085                     .addRecordToLog(logger, LogLevelEnum.DEBUG, "Invalid vertex type label {} has been received. ", entry.getValue().getKey(),
1086                         titatStatus);
1087                 return Either.right(titatStatus);
1088             }
1089             if (getVertexRes.isRight()) {
1090                 titatStatus = getVertexRes.right().value();
1091                 CommonUtility
1092                     .addRecordToLog(logger, LogLevelEnum.DEBUG, "Failed to get vertex by id {} . Status is {}. ", entry.getKey(), titatStatus);
1093                 result = Either.right(titatStatus);
1094                 break;
1095             } else {
1096                 vertices.put(entry.getKey(), getVertexRes.left().value());
1097             }
1098         }
1099         if (result == null) {
1100             result = Either.left(vertices);
1101         }
1102         return result;
1103     }
1104
1105     /**
1106      * Creates edge between "from" and "to" vertices with specified label and properties extracted from received edge
1107      *
1108      * @param from
1109      * @param to
1110      * @param label
1111      * @param edgeToCopy
1112      * @return
1113      */
1114     public JanusGraphOperationStatus createEdge(Vertex from, Vertex to, EdgeLabelEnum label, Edge edgeToCopy) {
1115         return createEdge(from, to, label, getEdgeProperties(edgeToCopy));
1116     }
1117
1118     public JanusGraphOperationStatus replaceEdgeLabel(Vertex fromVertex, Vertex toVertex, Edge prevEdge, EdgeLabelEnum prevLabel,
1119                                                       EdgeLabelEnum newLabel) {
1120         CommonUtility
1121             .addRecordToLog(logger, LogLevelEnum.TRACE, "Going to replace edge with label {} to {} between vertices {} and {}", prevLabel, newLabel,
1122                 fromVertex != null ? fromVertex.property(GraphPropertyEnum.UNIQUE_ID.getProperty()) : "NULL",
1123                 toVertex != null ? toVertex.property(GraphPropertyEnum.UNIQUE_ID.getProperty()) : "NULL");
1124         JanusGraphOperationStatus result = createEdge(fromVertex, toVertex, newLabel, prevEdge);
1125         if (result == JanusGraphOperationStatus.OK) {
1126             prevEdge.remove();
1127         }
1128         return result;
1129     }
1130
1131     /**
1132      * Replaces previous label of edge with new label
1133      *
1134      * @param fromVertex
1135      * @param toVertex
1136      * @param prevLabel
1137      * @param newLabel
1138      * @return
1139      */
1140     public JanusGraphOperationStatus replaceEdgeLabel(Vertex fromVertex, Vertex toVertex, EdgeLabelEnum prevLabel, EdgeLabelEnum newLabel) {
1141         Iterator<Edge> prevEdgeIter = toVertex.edges(Direction.IN, prevLabel.name());
1142         if (prevEdgeIter == null || !prevEdgeIter.hasNext()) {
1143             CommonUtility
1144                 .addRecordToLog(logger, LogLevelEnum.DEBUG, "Failed to replace edge with label {} to {} between vertices {} and {}", prevLabel,
1145                     newLabel, fromVertex.property(GraphPropertyEnum.UNIQUE_ID.getProperty()),
1146                     toVertex.property(GraphPropertyEnum.UNIQUE_ID.getProperty()));
1147             return JanusGraphOperationStatus.NOT_FOUND;
1148         } else {
1149             return replaceEdgeLabel(fromVertex, toVertex, prevEdgeIter.next(), prevLabel, newLabel);
1150         }
1151     }
1152
1153     /**
1154      * Updates metadata properties of vertex on graph. Json metadata property of the vertex will be updated with received properties too.
1155      *
1156      * @param vertex
1157      * @param properties
1158      * @return
1159      */
1160     public JanusGraphOperationStatus updateVertexMetadataPropertiesWithJson(Vertex vertex, Map<GraphPropertyEnum, Object> properties) {
1161         try {
1162             if (!MapUtils.isEmpty(properties)) {
1163                 String jsonMetadataStr = (String) vertex.property(GraphPropertyEnum.METADATA.getProperty()).value();
1164                 Map<String, Object> jsonMetadataMap = JsonParserUtils.toMap(jsonMetadataStr);
1165                 for (Map.Entry<GraphPropertyEnum, Object> property : properties.entrySet()) {
1166                     vertex.property(property.getKey().getProperty(), property.getValue());
1167                     jsonMetadataMap.put(property.getKey().getProperty(), property.getValue());
1168                 }
1169                 vertex.property(GraphPropertyEnum.METADATA.getProperty(), JsonParserUtils.toJson(jsonMetadataMap));
1170             }
1171         } catch (Exception e) {
1172             CommonUtility.addRecordToLog(logger, LogLevelEnum.DEBUG, "Exception occurred during update vertex metadata properties with json{}. {}",
1173                 vertex.property(GraphPropertyEnum.UNIQUE_ID.getProperty()), e.getMessage());
1174             return JanusGraphClient.handleJanusGraphException(e);
1175         }
1176         return JanusGraphOperationStatus.OK;
1177     }
1178
1179     public JanusGraphOperationStatus disassociateAndDeleteLast(GraphVertex vertex, Direction direction, EdgeLabelEnum label) {
1180         try {
1181             Iterator<Edge> edges = vertex.getVertex().edges(direction, label.name());
1182             while (edges.hasNext()) {
1183                 Edge edge = edges.next();
1184                 Vertex secondVertex;
1185                 Direction reverseDirection;
1186                 if (direction == Direction.IN) {
1187                     secondVertex = edge.outVertex();
1188                     reverseDirection = Direction.OUT;
1189                 } else {
1190                     secondVertex = edge.inVertex();
1191                     reverseDirection = Direction.IN;
1192                 }
1193                 edge.remove();
1194                 CommonUtility.addRecordToLog(logger, LogLevelEnum.TRACE, "Edge  {} with direction {} was removed from {}", label.name(), direction,
1195                     vertex.getVertex());
1196                 Iterator<Edge> restOfEdges = secondVertex.edges(reverseDirection, label.name());
1197                 if (!restOfEdges.hasNext()) {
1198                     secondVertex.remove();
1199                     CommonUtility.addRecordToLog(logger, LogLevelEnum.TRACE, "This was last edge . Vertex  {} was removed ", vertex.getUniqueId());
1200                 }
1201             }
1202         } catch (Exception e) {
1203             CommonUtility.addRecordToLog(logger, LogLevelEnum.DEBUG,
1204                 "Exception occured during deleting an edge with the label {} direction {} from vertex {}. {}", label.name(), direction,
1205                 vertex.getUniqueId(), e);
1206             return JanusGraphClient.handleJanusGraphException(e);
1207         }
1208         return JanusGraphOperationStatus.OK;
1209     }
1210
1211     public Object getProperty(JanusGraphVertex vertex, String key) {
1212         PropertyKey propertyKey = janusGraphClient.getGraph().left().value().getPropertyKey(key);
1213         return vertex.valueOrNull(propertyKey);
1214     }
1215
1216     public Object getProperty(Edge edge, EdgePropertyEnum key) {
1217         Object value = null;
1218         try {
1219             Property<Object> property = edge.property(key.getProperty());
1220             if (property != null) {
1221                 value = property.orElse(null);
1222                 if (value != null && key == EdgePropertyEnum.INSTANCES) {
1223                     return JsonParserUtils.toList((String) value, String.class);
1224                 }
1225                 return value;
1226             }
1227         } catch (Exception e) {
1228         }
1229         return value;
1230     }
1231
1232     /**
1233      * @param vertexA
1234      * @param vertexB
1235      * @param label
1236      * @param direction
1237      * @return
1238      */
1239     public JanusGraphOperationStatus moveEdge(GraphVertex vertexA, GraphVertex vertexB, EdgeLabelEnum label, Direction direction) {
1240         JanusGraphOperationStatus result = deleteEdgeByDirection(vertexA, direction, label);
1241         if (result != JanusGraphOperationStatus.OK) {
1242             logger.error("Failed to diassociate {} from element {}. error {} ", label, vertexA.getUniqueId(), result);
1243             return result;
1244         }
1245         JanusGraphOperationStatus createRelation;
1246         if (direction == Direction.IN) {
1247             createRelation = createEdge(vertexB, vertexA, label, null);
1248         } else {
1249             createRelation = createEdge(vertexA, vertexB, label, null);
1250         }
1251         if (createRelation != JanusGraphOperationStatus.OK) {
1252             return createRelation;
1253         }
1254         return JanusGraphOperationStatus.OK;
1255     }
1256
1257     public Either<Edge, JanusGraphOperationStatus> getBelongingEdgeByCriteria(String parentId, EdgeLabelEnum label,
1258                                                                               Map<GraphPropertyEnum, Object> properties) {
1259         Either<GraphVertex, JanusGraphOperationStatus> getVertexRes = getVertexById(parentId, JsonParseFlagEnum.NoParse);
1260         if (getVertexRes.isRight()) {
1261             return Either.right(getVertexRes.right().value());
1262         }
1263         return getBelongingEdgeByCriteria(getVertexRes.left().value(), label, properties);
1264     }
1265 }