Convert GRAPHSON_V2D0 Serializer response to GRAPHSON

Question

Azure cosmos support Serializers.GRAPHSON_V2D0. List<Result> resultList = client.submit("g.V().limit(1)").all().get() returns all the properties with the vertex and the format is completely different. Result looks like

{
    "resultObject": {
        "id": "63073513-1e86-49e6-a949-07f1e16c782b",
        "label": "TYPE-1",
        "type": "vertex",
        "properties": {
            "prop1": [
                {
                    "id": "63073513-1e86-49e6-a949-07f1e16c782b",
                    "value": "value1"
                }
            ],
            
        }
    }
}

But if I use Traversal with TinkerGraph, the default result uses Serializers.GRAPHSON where the result looks like

[
    {
        "id": "63073513-1e86-49e6-a949-07f1e16c782b",
        "label": "TYPE-1"
    }
]

For small result we can put a layer to covert the result but won't be straight forward thing for complex Path and other queries. I tried GraphSONMapper but didn't work. Is there any way to convert Serializers.GRAPHSON_V2D0 to Serializers.GRAPHSON? Or can we get GraphSON result from Cosmos?

Answer 1

This is not actually due to the serializers. It is due to the fact that, by default, Gremlin Server only returns a "Reference Element" for a vertex. It will just contain its ID and label. You can disable that by editing the script file in the <gremlin-server-root>/scripts folder. In there, the default file used is called empty-sample.groovy. At the bottom of that file you will find this line:

globals << [g : traversal().withEmbedded(graph).withStrategies(ReferenceElementStrategy)]

All you need to do is to replace it with just

globals << [g : traversal().withEmbedded(graph)]

Having done that, restart the server and you should see all properties as well as the ID and label.