It's very strange also with:
StreamSupport.stream(startNodes.spliterator(), false).flatMap(vertex1 ->
StreamSupport.stream(vertex1.getEdges(Direction.OUT,
relationshipId).spliterator(), false)).collect(Collectors.toList())
It seems like I am unable to detect the outgoing edges of the vertices.
They seem to be all null.
I've added them like this:
Iterable<Vertex> startNodes = this.getVertexList(storage.getStartNode(), graph);
Iterable<Vertex> endNodes = this.getVertexList(storage.getEndNode(), graph);
for (Vertex startNode : startNodes)
{
for (Vertex endNode : endNodes)
{
String edgeClass = "class:" + storage.getId();
Edge edge = startNode.addEdge(edgeClass, endNode);
for (Map.Entry<String, Object> entry :
storage.getProperties().entrySet())
{
edge.setProperty(entry.getKey(), entry.getValue());
}
edge.setProperty(Constants.TAG_HASH,
HashCreator.sha1FromRelationship(storage));
edge.setProperty(Constants.TAG_SNAPSHOT_ID, snapshotId);
}
}
graph.commit();
And it only detect ingoing vertices not the outgoing ones.
Am Freitag, 2. Dezember 2016 23:07:29 UTC-2 schrieb Ray Neiheiser:
>
> That seems like an option.
> But isn't there any option in gremlin/blueprints for it?
>
> Titan also uses gremlin and I can use:
>
> GraphTraversal<Vertex, Edge> tempOutput =
> graph.traversal().V(nodeStartList.toArray()).bothE().filter(__.otherV().is(P.within(nodeEndList.toArray())));
>
> Which will give me exactly what I want.
>
>
> Am Freitag, 2. Dezember 2016 01:23:04 UTC-2 schrieb Ivan Mainetti:
>>
>> not sure if this may work for you, but you could query via sql something
>> like
>>
>> select from E where out contains [<start-rid1>, <start-rid2>, <start-ridn
>> >] and in contains [<end-rid1>, <end-rid2>, <end-ridn>] and <some-
>> property>="something"
>>
>>
>>
>> Il giorno mercoledì 30 novembre 2016 15:19:24 UTC+1, Ray Neiheiser ha
>> scritto:
>>>
>>> I have some performance problems with reading edges depending on their
>>> start and end nodes. Is there a better way than checking every edges end
>>> vertex of every start vertex?
>>>
>>> Iterable<Vertex> startNodes =
>>> getVertexList(relationshipStorage.getStartNode(), graph);
>>> Iterable<Vertex> endNodes =
>>> getVertexList(relationshipStorage.getEndNode(), graph);
>>>
>>> List<Edge> list =
>>> StreamSupport.stream(startNodes.spliterator(), false)
>>> .flatMap(vertex1 ->
>>> StreamSupport.stream(vertex1.getEdges(Direction.OUT,
>>> relationshipId).spliterator(), false))
>>> .filter(edge ->
>>> StreamSupport.stream(endNodes.spliterator(), false).anyMatch(vertex ->
>>> edge.getVertex(Direction.OUT).equals(vertex)))
>>> .collect(Collectors.toList());
>>>
>>>
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