I want to run some queries in TinkerGraph, but I need to read them from an external text file, instead of performing Java calls:
TinkerGraph graph = TinkerGraph.open();
GraphTraversalSource g = graph.traversal();
InputStream input = new FileInputStream("graph.json");
GraphSONReader reader = GraphSONReader.build().create();
reader.readGraph(input, graph);
// Something like
run("g.V().hasLabel("foo").."
I've checked this question but the answers show some solutions using ConcurrentBindings that are not very clear to me.
You can use the GremlinGroovyScriptEngine class to perform the evaluation of a text string query, while using embedded TinkerGraph. If working with a Gremlin Server you would not need to do this.
The example below should more or less work unchanged. You may need to add a few include and type declaration statements from Java code but the basic building blocks essentially are these:
ScriptEngine engine = new GremlinGroovyScriptEngine();
Bindings bindings = engine.createBindings();
bindings.put("g", graph.traversal());
engine.eval("g.V().limit(5)", bindings);