ryn5 commented on code in PR #2298: URL: https://github.com/apache/tinkerpop/pull/2298#discussion_r1364398315
########## gremlin-dotnet/example/Example.cs: ########## @@ -0,0 +1,133 @@ +/* +Licensed to the Apache Software Foundation (ASF) under one +or more contributor license agreements. See the NOTICE file +distributed with this work for additional information +regarding copyright ownership. The ASF licenses this file +to you under the Apache License, Version 2.0 (the +"License"); you may not use this file except in compliance +with the License. You may obtain a copy of the License at + +http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, +software distributed under the License is distributed on an +"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +KIND, either express or implied. See the License for the +specific language governing permissions and limitations +under the License. +*/ + +using Gremlin; +using Gremlin.Net.Driver; +using Gremlin.Net.Driver.Remote; +using Gremlin.Net.Structure.IO.GraphSON; +using Gremlin.Net.Process.Traversal; + +// Common imports +using static Gremlin.Net.Process.Traversal.AnonymousTraversalSource; +using static Gremlin.Net.Process.Traversal.__; +using static Gremlin.Net.Process.Traversal.P; +using static Gremlin.Net.Process.Traversal.Order; +using static Gremlin.Net.Process.Traversal.Operator; +using static Gremlin.Net.Process.Traversal.Pop; +using static Gremlin.Net.Process.Traversal.Scope; +using static Gremlin.Net.Process.Traversal.TextP; +using static Gremlin.Net.Process.Traversal.Column; +using static Gremlin.Net.Process.Traversal.Direction; +using static Gremlin.Net.Process.Traversal.Cardinality; +using static Gremlin.Net.Process.Traversal.CardinalityValue; +using static Gremlin.Net.Process.Traversal.T; + + +ConnectionExample(); +BasicGremlinExample(); +ModernTraversalExample(); + +static void ConnectionExample() +{ + var server = new GremlinServer("localhost", 8182); + + // Connecting to the server + // using var remoteConnection = new DriverRemoteConnection(new GremlinClient(server), "g"); + + // Connecting to the server with customized configurations + using var remoteConnection = new DriverRemoteConnection(new GremlinClient( + new GremlinServer(hostname:"localhost", port:8182, enableSsl:false, username:"", password:"")), "g"); + + // Specifying a serializer + var client = new GremlinClient(server, new GraphSON3MessageSerializer()); + + // Creating the graph traversal + var g = Traversal().WithRemote(remoteConnection); +} + +static void BasicGremlinExample() +{ + var server = new GremlinServer("localhost", 8182); + using var remoteConnection = new DriverRemoteConnection(new GremlinClient(server), "g"); + var g = Traversal().WithRemote(remoteConnection); + + // Basic Gremlin: adding and retrieving data + var v1 = g.AddV("person").Property("name", "marko").Next(); + var v2 = g.AddV("person").Property("name", "stephen").Next(); + var v3 = g.AddV("person").Property("name", "vadas").Next(); + + // Be sure to use a terminating step like next() or iterate() so that the traversal "executes" + // Iterate() does not return any data and is used to just generate side-effects (i.e. write data to the database) + g.V(v1).AddE("knows").To(v2).Property("weight", 0.75).Iterate(); + g.V(v1).AddE("knows").To(v3).Property("weight", 0.75).Iterate(); + + // Retrieve the data from the "marko" vertex + var marko = g.V().Has("person","name","marko").Values<string>("name").Next(); + Console.WriteLine("name: " + marko); + + // Find the "marko" vertex and then traverse to the people he "knows" and return their data + var peopleMarkoKnows = g.V().Has("person","name","marko").Out("knows").Values<string>("name").ToList(); + foreach (var person in peopleMarkoKnows) + { + Console.WriteLine("marko knows " + person); + } +} + +static void ModernTraversalExample() +{ + var server = new GremlinServer("localhost", 8182); + using var remoteConnection = new DriverRemoteConnection(new GremlinClient(server), "g"); + var g = Traversal().WithRemote(remoteConnection); + + /* + This example requires the Modern toy graph to be preloaded upon launching the Gremlin server. + For details, see https://tinkerpop.apache.org/docs/current/reference/#gremlin-server-docker-image and use + conf/gremlin-server-modern.yaml. + */ + var e1 = g.V(1).BothE().ToList(); // (1) + var e2 = g.V(1).BothE().Where(OtherV().HasId(2)).ToList(); // (2) + var v1 = g.V(1).Next(); + var v2 = g.V(2).Next(); + var e3 = g.V(v1).BothE().Where(OtherV().Is(v2)).ToList(); // (3) + var e4 = g.V(v1).OutE().Where(InV().Is(v2)).ToList(); // (4) + var e5 = g.V(1).OutE().Where(InV().Has(T.Id, Within(2, 3))).ToList(); // (5) Review Comment: These traversal examples were taken and adapted from https://tinkerpop.apache.org/docs/3.7.0/recipes/, so I'm thinking the example may have wanted to show both ways of using Id -- This is an automated message from the Apache Git Service. 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