[TINKERPOP-789] Choose then Enforce Semantics for Graph.close()

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Do
• Affects Version/s: 3.0.2-incubating
• Component/s: structure, test-suite
• Assignee: Stephen Mallette
• Reporter: Stephen Mallette
• Created: 30/Jul/15 20:57
• Updated: 15/Jun/17 17:27
• Resolved: 15/Jun/17 17:27

Description

The semantics for Graph.close() are fairly open right now. See TinkerGraph:

gremlin> graph = TinkerFactory.createModern()
==>tinkergraph[vertices:6 edges:6]
gremlin> graph.close()
==>null
gremlin> graph.vertices()
==>v[1]
==>v[2]
==>v[3]
==>v[4]
==>v[5]
==>v[6]

Seems like a call to close() should mean something especially since we implement AutoCloseable. I believe that most graphs throw exceptions (Titan does IllegalStateException i think) if you try to access the graph once close() is called.