edgeID is returned as alpha numeric instead of long

[ChidambaramR]

I use the following code to create an edge

        Edge e = this.g
            .V(fromId) // get vertex of id given for the source
            .as("fromVertex") // label as fromVertex to be accessed later
            .V(toId) // get  vertex of id given for destination
            .coalesce( // evaluates the provided traversals in order and returns the first traversal that emits at least one element
                inE(label) // check incoming edge of label given
                    .where( // conditional check to check if edge exists
                        outV() // get destination vertex of the edge to check
                            .as("fromVertex")), // against staged vertex
                addE(label) // add edge if not present
                    .from("fromVertex"))
            .next(); // end traversal to commit to graph

        System.out.println(Long.parseLong(e.id().toString());

This prints edgeId as 1lb-394-36d-38. As a result of this, I am getting NumberFormatException. I thought all ids are long by default. Is there something I need to configure?

This is my current configuration

gremlin.graph=org.janusgraph.core.JanusGraphFactory

storage.backend=berkeleyje
storage.directory=jgex/berkeleyje

index.jgex.backend=lucene
index.jgex.directory=jgex/lucene

[vtslab]

g.E().id() returns RelationIdentifier instances, see: https://javadoc.io/doc/org.janusgraph/janusgraph-driver/latest/org/janusgraph/graphdb/relations/RelationIdentifier.html. If you want the long id, use g.E().id().getRelationId().

[ChidambaramR]

Thanks for the response. I was not aware of this

[FlorianHockmann]

I thought all ids are long by default.

Where did you get that? Only vertex IDs are long, edge ids are more complicated which is why they are represented as a RelationIdentifier object. Can't you just print them like this:

System.out.println(e.id().toString());

The RelationIdentifier for example also contains the adjacent vertex ids.

[ChidambaramR]

Seems like it is just my assumption seeing that vertexIds are long. Hence all through my code, I typed edgeIds to long and it was failing. Thanks for clarifying.