catalog-model/src/main/java/org/openecomp/sdc/be/model/operations/impl/DefaultDerivedFromOperation.java

   1 package org.openecomp.sdc.be.model.operations.impl;
   2
   3 import fj.data.Either;
   4 import org.apache.commons.lang3.tuple.ImmutablePair;
   5 import org.apache.commons.lang3.tuple.Pair;
   6 import org.openecomp.sdc.be.dao.graph.datatype.GraphEdge;
   7 import org.openecomp.sdc.be.dao.graph.datatype.GraphNode;
   8 import org.openecomp.sdc.be.dao.graph.datatype.GraphRelation;
   9 import org.openecomp.sdc.be.dao.neo4j.GraphEdgeLabels;
  10 import org.openecomp.sdc.be.dao.neo4j.GraphPropertiesDictionary;
  11 import org.openecomp.sdc.be.dao.titan.TitanGenericDao;
  12 import org.openecomp.sdc.be.dao.titan.TitanOperationStatus;
  13 import org.openecomp.sdc.be.datatypes.enums.NodeTypeEnum;
  14 import org.openecomp.sdc.be.model.operations.api.DerivedFromOperation;
  15 import org.openecomp.sdc.be.model.operations.api.StorageOperationStatus;
  16 import org.openecomp.sdc.be.resources.data.UniqueIdData;
  17 import org.openecomp.sdc.common.log.wrappers.Logger;
  18 import org.springframework.stereotype.Component;
  19
  20 import java.util.*;
  21 import java.util.function.Function;
  22
  23 @Component
  24 public class DefaultDerivedFromOperation implements DerivedFromOperation {
  25
  26     private static final Logger log = Logger.getLogger(DefaultDerivedFromOperation.class.getName());
  27     private TitanGenericDao titanGenericDao;
  28
  29     public DefaultDerivedFromOperation(TitanGenericDao titanGenericDao) {
  30         this.titanGenericDao = titanGenericDao;
  31     }
  32
  33     @Override
  34     public Either<GraphRelation, StorageOperationStatus> addDerivedFromRelation(String parentUniqueId, String derivedFromUniqueId, NodeTypeEnum nodeType) {
  35         UniqueIdData from = new UniqueIdData(nodeType, parentUniqueId);
  36         UniqueIdData to = new UniqueIdData(nodeType, derivedFromUniqueId);
  37         return titanGenericDao.createRelation(from, to, GraphEdgeLabels.DERIVED_FROM, null)
  38                 .right()
  39                 .map(DaoStatusConverter::convertTitanStatusToStorageStatus);
  40     }
  41
  42     @Override
  43     public <T extends GraphNode> Either<T, StorageOperationStatus> getDerivedFromChild(String uniqueId, NodeTypeEnum nodeType, Class<T> clazz) {
  44         log.debug("#getDerivedFromChild - fetching derived from entity for node type {} with id {}", nodeType, uniqueId);
  45         return titanGenericDao.getChild(UniqueIdBuilder.getKeyByNodeType(nodeType), uniqueId, GraphEdgeLabels.DERIVED_FROM, nodeType, clazz)
  46                 .bimap(Pair::getKey,
  47                        DaoStatusConverter::convertTitanStatusToStorageStatus);
  48     }
  49
  50     @Override
  51     public StorageOperationStatus removeDerivedFromRelation(String uniqueId, String derivedFromUniqueId, NodeTypeEnum nodeType) {
  52         UniqueIdData from = new UniqueIdData(nodeType, uniqueId);
  53         UniqueIdData to = new UniqueIdData(nodeType, derivedFromUniqueId);
  54         return isDerivedFromExists(from, to)
  55                 .either(isRelationExist -> isRelationExist ? deleteDerivedFrom(from, to) : StorageOperationStatus.OK,
  56                         DaoStatusConverter::convertTitanStatusToStorageStatus);
  57
  58
  59     }
  60
  61     private StorageOperationStatus deleteDerivedFrom(UniqueIdData from,  UniqueIdData to) {
  62         return titanGenericDao.deleteRelation(from, to, GraphEdgeLabels.DERIVED_FROM)
  63                 .either(deletedRelation -> StorageOperationStatus.OK,
  64                         DaoStatusConverter::convertTitanStatusToStorageStatus);
  65     }
  66
  67     private Either<Boolean, TitanOperationStatus> isDerivedFromExists(UniqueIdData from, UniqueIdData to) {
  68         return titanGenericDao.isRelationExist(from, to, GraphEdgeLabels.DERIVED_FROM);
  69     }
  70
  71     @Override
  72     public <T extends GraphNode> Either<Boolean, StorageOperationStatus> isTypeDerivedFrom(String childCandidateType, String parentCandidateType, String currentChildType,
  73                                                                                                     NodeTypeEnum nodeType, Class<T> clazz, Function<T, String> typeProvider) {
  74         Map<String, Object> propertiesToMatch = new HashMap<>();
  75         propertiesToMatch.put(GraphPropertiesDictionary.TYPE.getProperty(), childCandidateType);
  76
  77         Either<List<T>, TitanOperationStatus> getResponse = titanGenericDao.getByCriteria(nodeType, propertiesToMatch, clazz);
  78         if (getResponse.isRight()) {
  79             TitanOperationStatus titanOperationStatus = getResponse.right().value();
  80             log.debug("Couldn't fetch type {}, error: {}", childCandidateType, titanOperationStatus);
  81             return Either.right(DaoStatusConverter.convertTitanStatusToStorageStatus(titanOperationStatus));
  82         }
  83         T node = getResponse.left().value().get(0);
  84         String childUniqueId = node.getUniqueId();
  85         String childType = typeProvider.apply(node);
  86
  87         Set<String> travelledTypes = new HashSet<>();
  88         if (currentChildType != null) {
  89             travelledTypes.add(currentChildType);
  90         }
  91
  92         do {
  93             travelledTypes.add(childType);
  94             Either<List<ImmutablePair<T, GraphEdge>>, TitanOperationStatus> childrenNodes = titanGenericDao.getChildrenNodes(UniqueIdBuilder.getKeyByNodeType(nodeType), childUniqueId, GraphEdgeLabels.DERIVED_FROM,
  95                     nodeType, clazz);
  96             if (childrenNodes.isRight()) {
  97                 if (childrenNodes.right().value() != TitanOperationStatus.NOT_FOUND) {
  98                     TitanOperationStatus titanOperationStatus = getResponse.right().value();
  99                     log.debug("Couldn't fetch derived from node for type {}, error: {}", childCandidateType, titanOperationStatus);
 100                     return Either.right(DaoStatusConverter.convertTitanStatusToStorageStatus(titanOperationStatus));
 101                 } else {
 102                     log.debug("Derived from node is not found for type {} - this is OK for root capability.", childCandidateType);
 103                     return Either.left(false);
 104                 }
 105             }
 106             String derivedFromUniqueId = childrenNodes.left().value().get(0).getLeft().getUniqueId();
 107             String derivedFromType = typeProvider.apply(childrenNodes.left().value().get(0).getLeft());
 108             if (derivedFromType.equals(parentCandidateType)) {
 109                 log.debug("Verified that type {} derives from type {}", childCandidateType, parentCandidateType);
 110                 return Either.left(true);
 111             }
 112             childUniqueId = derivedFromUniqueId;
 113             childType = derivedFromType;
 114         } while (!travelledTypes.contains(childType));
 115         // this stop condition should never be used, if we use it, we have an
 116         // illegal cycle in graph - "derived from" hierarchy cannot be cycled.
 117         // It's here just to avoid infinite loop in case we have such cycle.
 118         log.error("Detected a cycle of \"derived from\" edges starting at type node {}", childType);
 119         return Either.right(StorageOperationStatus.GENERAL_ERROR);
 120     }
 121
 122
 123
 124     @Override
 125     public <T extends GraphNode> StorageOperationStatus isUpdateParentAllowed(String oldTypeParent, String newTypeParent, String childType,
 126                                                                               NodeTypeEnum nodeType, Class<T> clazz,
 127                                                                               Function<T, String> typeProvider) {
 128         StorageOperationStatus status;
 129         if (oldTypeParent != null) {
 130
 131             Either<Boolean, StorageOperationStatus> result = isTypeDerivedFrom(newTypeParent, oldTypeParent, childType, nodeType, clazz, typeProvider);
 132             if (result.isRight()) {
 133                 log.debug("#isUpdateParentAllowed - failed to detect that new parent {} is derived from the current parent {}",  newTypeParent, oldTypeParent);
 134                 status = result.right().value();
 135             }
 136             else {
 137                 if (result.left().value()) {
 138                     log.debug("#isUpdateParentAllowed - update is allowed since new parent {} is derived from the current parent {}",  newTypeParent, oldTypeParent);
 139                     status = StorageOperationStatus.OK;
 140                 }
 141                 else {
 142                     log.debug("#isUpdateParentAllowed - update is not allowed since new parent {} is not derived from the current parent {}",  newTypeParent, oldTypeParent);
 143                     status = StorageOperationStatus.CANNOT_UPDATE_EXISTING_ENTITY;
 144                 }
 145             }
 146
 147         }
 148         else {
 149             log.debug("#isUpdateParentAllowed - the update is allowed since the parent still has been not set." );
 150             status = StorageOperationStatus.OK;
 151         }
 152
 153         return status;
 154     }
 155
 156 }