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package com.stackoverflow; | |
import org.apache.tinkerpop.gremlin.process.traversal.Traversal; | |
import org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerGraph; | |
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource; | |
import org.apache.tinkerpop.gremlin.structure.Graph; | |
import org.apache.tinkerpop.gremlin.structure.Vertex; | |
import static org.apache.tinkerpop.gremlin.process.traversal.Operator.*; | |
import static org.apache.tinkerpop.gremlin.process.traversal.Order.*; | |
import static org.apache.tinkerpop.gremlin.process.traversal.P.*; | |
import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.*; | |
import static org.apache.tinkerpop.gremlin.structure.Column.*; | |
import static org.apache.tinkerpop.gremlin.structure.T.*; | |
/** | |
* @author Daniel Kuppitz (me@gremlin.guru) | |
*/ | |
public class App { | |
public static void main(String[] args) { | |
final Graph graph = TinkerGraph.open(); | |
final GraphTraversalSource g = graph.traversal(); | |
final Vertex web = graph.addVertex(label, "Server", "name", "WEB"); | |
final Vertex app = graph.addVertex(label, "Server", "name", "APP1"); | |
final Vertex app2 = graph.addVertex(label, "Server", "name", "APP2"); | |
final Vertex app3 = graph.addVertex(label, "Server", "name", "APP3"); | |
final Vertex sql = graph.addVertex(label, "Server", "name", "SQL"); | |
web.addEdge("DEPENDS_ON", app); | |
web.addEdge("DEPENDS_ON", app2); | |
app.addEdge("DEPENDS_ON", sql); | |
app3.addEdge("DEPENDS_ON", sql); | |
app2.addEdge("DEPENDS_ON", app3); | |
final Traversal repeatTraversal = | |
cap("x").unfold(). | |
filter(select(values).not(unfold().where(without("y")))). | |
select(keys).where(without("y")). | |
aggregate("y"). | |
aggregate("z"). | |
by(project("a","b"). | |
by(). | |
by(coalesce(select("z").unfold().select("b").order().by(decr).limit(1). | |
sack(assign).sack(sum).by(constant(1)).sack(), | |
constant(0)))); | |
g.V().group("x").by("name").by(out("DEPENDS_ON").values("name").fold()).barrier(). | |
repeat(repeatTraversal).cap("z").unfold(). | |
group().by(select("b")).by(select("a").fold()). | |
forEachRemaining(System.out::println); | |
} | |
} |
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