public Vertex createVertexWithIdentity(
ITypedReferenceableInstance typedInstance, Set<String> superTypeNames) {
final Vertex vertexWithIdentity =
createVertexWithoutIdentity(
typedInstance.getTypeName(), typedInstance.getId(), superTypeNames);
// add identity
final String guid = UUID.randomUUID().toString();
setProperty(vertexWithIdentity, Constants.GUID_PROPERTY_KEY, guid);
// add version information
setProperty(vertexWithIdentity, Constants.VERSION_PROPERTY_KEY, typedInstance.getId().version);
return vertexWithIdentity;
}
/**
* Adds a new trait to an existing entity represented by a guid.
*
* @param guid globally unique identifier for the entity
* @param traitInstance trait instance that needs to be added to entity
* @throws RepositoryException
*/
@Override
@GraphTransaction
public void addTrait(String guid, ITypedStruct traitInstance) throws RepositoryException {
Preconditions.checkNotNull(traitInstance, "Trait instance cannot be null");
final String traitName = traitInstance.getTypeName();
LOG.debug("Adding a new trait={} for entity={}", traitName, guid);
try {
Vertex instanceVertex = graphHelper.getVertexForGUID(guid);
// add the trait instance as a new vertex
final String typeName = GraphHelper.getTypeName(instanceVertex);
TypedInstanceToGraphMapper instanceToGraphMapper =
new TypedInstanceToGraphMapper(graphToInstanceMapper, deleteHandler);
instanceToGraphMapper.mapTraitInstanceToVertex(
traitInstance, typeSystem.getDataType(ClassType.class, typeName), instanceVertex);
// update the traits in entity once adding trait instance is successful
GraphHelper.addProperty(instanceVertex, Constants.TRAIT_NAMES_PROPERTY_KEY, traitName);
GraphHelper.setProperty(
instanceVertex,
Constants.MODIFICATION_TIMESTAMP_PROPERTY_KEY,
RequestContext.get().getRequestTime());
} catch (RepositoryException e) {
throw e;
} catch (Exception e) {
throw new RepositoryException(e);
}
}
public Vertex createVertexWithoutIdentity(
String typeName, Id typedInstanceId, Set<String> superTypeNames) {
LOG.debug(
"Creating vertex for type {} id {}",
typeName,
typedInstanceId != null ? typedInstanceId._getId() : null);
final Vertex vertexWithoutIdentity = titanGraph.addVertex(null);
// add type information
setProperty(vertexWithoutIdentity, Constants.ENTITY_TYPE_PROPERTY_KEY, typeName);
// add super types
for (String superTypeName : superTypeNames) {
addProperty(vertexWithoutIdentity, Constants.SUPER_TYPES_PROPERTY_KEY, superTypeName);
}
// add timestamp information
setProperty(
vertexWithoutIdentity, Constants.TIMESTAMP_PROPERTY_KEY, System.currentTimeMillis());
return vertexWithoutIdentity;
}
private void updateTraits(Vertex instanceVertex, List<String> traitNames) {
// remove the key
instanceVertex.removeProperty(Constants.TRAIT_NAMES_PROPERTY_KEY);
// add it back again
for (String traitName : traitNames) {
GraphHelper.addProperty(instanceVertex, Constants.TRAIT_NAMES_PROPERTY_KEY, traitName);
}
GraphHelper.setProperty(
instanceVertex,
Constants.MODIFICATION_TIMESTAMP_PROPERTY_KEY,
RequestContext.get().getRequestTime());
}
/**
* Deletes the edge between outvertex and inVertex. The edge is for attribute attributeName of
* outVertex
*
* @param outVertex
* @param inVertex
* @param attributeName
* @throws AtlasException
*/
protected void deleteEdgeBetweenVertices(Vertex outVertex, Vertex inVertex, String attributeName)
throws AtlasException {
LOG.debug(
"Removing edge from {} to {} with attribute name {}",
string(outVertex),
string(inVertex),
attributeName);
String typeName = GraphHelper.getTypeName(outVertex);
String outId = GraphHelper.getIdFromVertex(outVertex);
Id.EntityState state = GraphHelper.getState(outVertex);
if ((outId != null && RequestContext.get().isDeletedEntity(outId))
|| state == Id.EntityState.DELETED) {
// If the reference vertex is marked for deletion, skip updating the reference
return;
}
IDataType type = typeSystem.getDataType(IDataType.class, typeName);
AttributeInfo attributeInfo = getFieldMapping(type).fields.get(attributeName);
String propertyName = GraphHelper.getQualifiedFieldName(type, attributeName);
String edgeLabel = EDGE_LABEL_PREFIX + propertyName;
Edge edge = null;
switch (attributeInfo.dataType().getTypeCategory()) {
case CLASS:
// If its class attribute, its the only edge between two vertices
if (attributeInfo.multiplicity.nullAllowed()) {
edge = GraphHelper.getEdgeForLabel(outVertex, edgeLabel);
if (shouldUpdateReverseAttribute) {
GraphHelper.setProperty(outVertex, propertyName, null);
}
} else {
// Cannot unset a required attribute.
throw new NullRequiredAttributeException(
"Cannot unset required attribute "
+ GraphHelper.getQualifiedFieldName(type, attributeName)
+ " on "
+ string(outVertex)
+ " edge = "
+ edgeLabel);
}
break;
case ARRAY:
// If its array attribute, find the right edge between the two vertices and update array
// property
List<String> elements = outVertex.getProperty(propertyName);
if (elements != null) {
elements =
new ArrayList<>(
elements); // Make a copy, else list.remove reflects on titan.getProperty()
for (String elementEdgeId : elements) {
Edge elementEdge = graphHelper.getEdgeByEdgeId(outVertex, edgeLabel, elementEdgeId);
if (elementEdge == null) {
continue;
}
Vertex elementVertex = elementEdge.getVertex(Direction.IN);
if (elementVertex.getId().toString().equals(inVertex.getId().toString())) {
edge = elementEdge;
// TODO element.size includes deleted items as well. should exclude
if (!attributeInfo.multiplicity.nullAllowed()
&& elements.size() <= attributeInfo.multiplicity.lower) {
// Deleting this edge would violate the attribute's lower bound.
throw new NullRequiredAttributeException(
"Cannot remove array element from required attribute "
+ GraphHelper.getQualifiedFieldName(type, attributeName)
+ " on "
+ string(outVertex)
+ " "
+ string(elementEdge));
}
if (shouldUpdateReverseAttribute) {
// if composite attribute, remove the reference as well. else, just remove the edge
// for example, when table is deleted, process still references the table
// but when column is deleted, table will not reference the deleted column
LOG.debug(
"Removing edge {} from the array attribute {}",
string(elementEdge),
attributeName);
elements.remove(elementEdge.getId().toString());
GraphHelper.setProperty(outVertex, propertyName, elements);
break;
}
}
}
}
break;
case MAP:
// If its map attribute, find the right edge between two vertices and update map property
List<String> keys = outVertex.getProperty(propertyName);
if (keys != null) {
keys =
new ArrayList<>(
keys); // Make a copy, else list.remove reflects on titan.getProperty()
for (String key : keys) {
String keyPropertyName = GraphHelper.getQualifiedNameForMapKey(propertyName, key);
String mapEdgeId = outVertex.getProperty(keyPropertyName);
Edge mapEdge = graphHelper.getEdgeByEdgeId(outVertex, keyPropertyName, mapEdgeId);
Vertex mapVertex = mapEdge.getVertex(Direction.IN);
if (mapVertex.getId().toString().equals(inVertex.getId().toString())) {
// TODO keys.size includes deleted items as well. should exclude
if (attributeInfo.multiplicity.nullAllowed()
|| keys.size() > attributeInfo.multiplicity.lower) {
edge = mapEdge;
} else {
// Deleting this entry would violate the attribute's lower bound.
throw new NullRequiredAttributeException(
"Cannot remove map entry "
+ keyPropertyName
+ " from required attribute "
+ GraphHelper.getQualifiedFieldName(type, attributeName)
+ " on "
+ string(outVertex)
+ " "
+ string(mapEdge));
}
if (shouldUpdateReverseAttribute) {
// remove this key
LOG.debug(
"Removing edge {}, key {} from the map attribute {}",
string(mapEdge),
key,
attributeName);
keys.remove(key);
GraphHelper.setProperty(outVertex, propertyName, keys);
GraphHelper.setProperty(outVertex, keyPropertyName, null);
}
break;
}
}
}
break;
case STRUCT:
case TRAIT:
break;
default:
throw new IllegalStateException(
"There can't be an edge from "
+ string(outVertex)
+ " to "
+ string(inVertex)
+ " with attribute name "
+ attributeName
+ " which is not class/array/map attribute");
}
if (edge != null) {
deleteEdge(edge, false);
RequestContext requestContext = RequestContext.get();
GraphHelper.setProperty(
outVertex,
Constants.MODIFICATION_TIMESTAMP_PROPERTY_KEY,
requestContext.getRequestTime());
requestContext.recordEntityUpdate(outId);
}
}