questions
in JanusGraph
in JanusGraph
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MException in thread "main" java.lang.NullPointerException: Cannot invoke method activate() on null object
at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:113)
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C
Tjanusgraph.index.search.backendjanusgraph.index.search.backend: elasticsearch
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CTDtx.log-tx = truetxloggraph.getBackend().getSystemTxLog()registerReader(...)nullstartTransactionRecovery()
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LPsubmissionDate4single property - index used for ordering.pngsubmissionDate4OrderGlobalSteplist property - index not used for ordering.pngsingle.groovylist.groovy
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HWT
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# Tutorial
# https://docs.janusgraph.org/getting-started/basic-usage/#cohabitors-of-tartarus
gremlin> // pluto can't be his own cohabitant
gremlin> g.V(pluto).out('lives').in('lives').where(is(neq(pluto))).values('name')
==>cerberus
# My result
gremlin> g.V(pluto).out('lives').in('lives').where(is(neq(pluto))).values('name')
==>plutogremlin> g.V(pluto).as('x').out('lives').in('lives').where(neq('x')).values('name')
==>cerberusvar transaction = graph.buildTransaction().start(); // graph is a StandardJanusGraph
var g = transaction.traversal();
g.inject(1).addE(edgeLabel).from(V("ExistingVertexId")).to(V("MissingVertexId")).iterate();
transaction.commit();vertexgremlin> g.V("MissingVertexId").label()
==>vertex
gremlin> g.V("MissingVertexId").valueMap()
==>[]