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JJanusGraph

•Created by smp on 12/11/2024 in #questions

Why queries are slow when more than one mixed index in query

2 replies

JJanusGraph

•Created by smp on 11/19/2024 in #questions

Custom Vertex ID and coalesce

I am trying to find a vertex by ID if it exists update a property otherwise create a vertex with the ID.

ConfiguredGraphFactory.open("tenant51").traversal().
V().hasId('45gjttOlN2+udTmQcJnHpp').fold()
.coalesce(
unfold().property('attribute_7', 'value_7'), 
addV().property('id', '45gjttOlN2+udTmQcJnHpp').property('attribute_7', 'value_7')
)

I couldn't find a way to pass id for the vertex in coalesce.

java.lang.IllegalArgumentException: Must provide vertex id
    at com.google.common.base.Preconditions.checkArgument(Preconditions.java:143)
    at org.janusgraph.graphdb.transaction.StandardJanusGraphTx.addVertex(StandardJanusGraphTx.java:638)
    at org.janusgraph.graphdb.tinkerpop.JanusGraphBlueprintsTransaction.addVertex(JanusGraphBlueprintsTransaction.java:138)
    at org.janusgraph.graphdb.tinkerpop.JanusGraphBlueprintsGraph.addVertex(JanusGraphBlueprintsGraph.java:143)
    at org.janusgraph.graphdb.tinkerpop.JanusGraphBlueprintsGraph.addVertex(JanusGraphBlueprintsGraph.java:59)

@Bo Am I missing something.

4 replies

JJanusGraph

•Created by smp on 10/25/2024 in #questions

ConfigurationManagementGraph fails with Must provide vertex id

I am new to the JanusGraph. Trying to create dynamic graphs. I couldn't create configuration template. Am I missing anything. Thanks My config:

 graphManager: org.janusgraph.graphdb.management.JanusGraphManager
    graphs: {
      ConfigurationManagementGraph: /etc/opt/janusgraph/janusgraph-cql-configuration.server.properties,
      graph: /etc/opt/janusgraph/janusgraph-cql-server.properties
    }

  janusgraph-cql-configuration.server.properties: |
    gremlin.graph = org.janusgraph.core.ConfiguredGraphFactory
    storage.backend = cql
    graph.graphname = ConfigurationManagementGraph

gremlin> map = new HashMap();
gremlin> map.put('storage.backend', 'cql');
==>null
gremlin> map.put('storage.hostname', 'scylla-scylladb');
==>null
gremlin> ConfiguredGraphFactory.createTemplateConfiguration(new MapConfiguration(map));
Must provide vertex id

8 replies

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