How to use the gremlin.driver function in gremlin
To help you get started, we’ve selected a few gremlin examples, based on popular ways it is used in public projects.
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aws-samples / amazon-neptune-samples / gremlin / visjs-neptune / indexLambda.js View on Github 
exports.handler = function(event, context, callback) {
var DriverRemoteConnection = gremlin.driver.DriverRemoteConnection;
var Graph = gremlin.structure.Graph;
//Use wss:// for secure connections. See https://docs.aws.amazon.com/neptune/latest/userguide/access-graph-ssl.html
dc = new DriverRemoteConnection('wss://'+process.env.NEPTUNE_CLUSTER_ENDPOINT+':'+process.env.NEPTUNE_PORT+'/gremlin');
var graph = new Graph();
var g = graph.traversal().withRemote(dc);
const headers = {
'Access-Control-Allow-Origin': '*',
'Access-Control-Allow-Methods': 'OPTIONS, POST, GET',
'Access-Control-Max-Age': 2592000, // 30 days
/** add other headers as per requirement */
'Access-Control-Allow-Headers' : '*',
"Content-Type": "application/json"
};
console.log("Path Parameters => "+ event.pathParameters);this.cosmos_gremlin_uri = process.env.AZURE_COSMOSDB_GRAPHDB_URI; // https://cjoakimcosmosdbgremlin.documents.azure.com:443/
this.cosmos_gremlin_wssuri = 'wss://' + this.cosmos_gremlin_acct + '.gremlin.cosmosdb.azure.com:443/gremlin';
this.graph_coll_link = '/dbs/' + this.cosmos_gremlin_db + '/colls/' + this.cosmos_gremlin_graph;
console.log('cosmos_gremlin_acct: ' + this.cosmos_gremlin_acct);
console.log('cosmos_gremlin_db: ' + this.cosmos_gremlin_db);
console.log('cosmos_gremlin_graph: ' + this.cosmos_gremlin_graph);
console.log('cosmos_gremlin_views: ' + this.cosmos_gremlin_views);
console.log('cosmos_gremlin_wssuri: ' + this.cosmos_gremlin_wssuri);
console.log('graph_coll_link: ' + this.graph_coll_link);
// Gremlin client
var guri = this.cosmos_gremlin_wssuri;
var gkey = this.cosmos_gremlin_key
var glink = this.graph_coll_link;
var authenticator = new gremlin.driver.auth.PlainTextSaslAuthenticator(glink, gkey);
this.gremlin_client = new gremlin.driver.Client(
guri,
{
authenticator,
traversalsource : "g",
rejectUnauthorized : true,
mimeType : "application/vnd.gremlin-v2.0+json"
}
);
// SQL client
var suri = this.cosmos_gremlin_uri;
var skey = this.cosmos_gremlin_key;
this.sql_client = new CosmosClient({ endpoint: suri, auth: { masterKey: skey } });
}this.cosmos_gremlin_wssuri = 'wss://' + this.cosmos_gremlin_acct + '.gremlin.cosmosdb.azure.com:443/gremlin';
this.graph_coll_link = '/dbs/' + this.cosmos_gremlin_db + '/colls/' + this.cosmos_gremlin_graph;
console.log('cosmos_gremlin_acct: ' + this.cosmos_gremlin_acct);
console.log('cosmos_gremlin_db: ' + this.cosmos_gremlin_db);
console.log('cosmos_gremlin_graph: ' + this.cosmos_gremlin_graph);
console.log('cosmos_gremlin_views: ' + this.cosmos_gremlin_views);
console.log('cosmos_gremlin_wssuri: ' + this.cosmos_gremlin_wssuri);
console.log('graph_coll_link: ' + this.graph_coll_link);
// Gremlin client
var guri = this.cosmos_gremlin_wssuri;
var gkey = this.cosmos_gremlin_key
var glink = this.graph_coll_link;
var authenticator = new gremlin.driver.auth.PlainTextSaslAuthenticator(glink, gkey);
this.gremlin_client = new gremlin.driver.Client(
guri,
{
authenticator,
traversalsource : "g",
rejectUnauthorized : true,
mimeType : "application/vnd.gremlin-v2.0+json"
}
);
// SQL client
var suri = this.cosmos_gremlin_uri;
var skey = this.cosmos_gremlin_key;
this.sql_client = new CosmosClient({ endpoint: suri, auth: { masterKey: skey } });
}"use strict";
const Gremlin = require('gremlin');
const config = require("./config");
const cohort = require('./cohortMembers');
const groups = require('./seniorGroups');
const teams = require('./teammembers');
const authenticator = new Gremlin.driver.auth.PlainTextSaslAuthenticator(`/dbs/${config.database}/colls/${config.collection}`, config.primaryKey)
const client = new Gremlin.driver.Client(
config.endpoint,
{
authenticator,
traversalsource : "g",
rejectUnauthorized : true,
mimeType : "application/vnd.gremlin-v2.0+json"
}
);
function dropGraph()
{
console.log('Running Drop');
return client.submit('g.V().outE().drop()', { })
.then(()=> client.submit('g.V().drop()', { }))
.then(function (result) {"use strict";
const Gremlin = require('gremlin');
const config = require("./config");
const cohort = require('./cohortMembers');
const groups = require('./seniorGroups');
const teams = require('./teammembers');
const authenticator = new Gremlin.driver.auth.PlainTextSaslAuthenticator(`/dbs/${config.database}/colls/${config.collection}`, config.primaryKey)
const client = new Gremlin.driver.Client(
config.endpoint,
{
authenticator,
traversalsource : "g",
rejectUnauthorized : true,
mimeType : "application/vnd.gremlin-v2.0+json"
}
);
function dropGraph()
{
console.log('Running Drop');
return client.submit('g.V().outE().drop()', { })"use strict";
const Gremlin = require('gremlin');
const config = require("./config");
const authenticator = new Gremlin.driver.auth.PlainTextSaslAuthenticator(`/dbs/${config.database}/colls/${config.collection}`, config.primaryKey)
const client = new Gremlin.driver.Client(
config.endpoint,
{
authenticator,
traversalsource : "g",
rejectUnauthorized : true,
mimeType : "application/vnd.gremlin-v2.0+json"
}
);
function dropGraph()
{
console.log('Running Drop');
return client.submit('g.V().drop()', { }).then(function (result) {app.post('/query', (req, res, next) => {
const gremlinHost = req.body.host;
const gremlinPort = req.body.port;
const nodeLimit = req.body.nodeLimit;
const query = req.body.query;
const client = new gremlin.driver.Client(`ws://${gremlinHost}:${gremlinPort}/gremlin`, { traversalSource: 'g', mimeType: 'application/json' });
client.submit(makeQuery(query, nodeLimit), {})
.then((result) => res.send(nodesToJson(result._items)))
.catch((err) => next(err));
});.then((result) => {
delete this._rejections[queryId];
resolve(new gremlin.driver.RemoteTraversal(result.toArray()));
})
.catch(reject);function localConnect(username, password, uri){
const authenticator = new Gremlin.driver.auth.PlainTextSaslAuthenticator(`'${username}', '${password}'`)
const client = new Gremlin.driver.Client(
uri,
{
authenticator,
traversalsource : "g",
rejectUnauthorized : true,
mimeType : "application/vnd.gremlin-v2.0+json"
}
);
mogwai.client = client;
return client;
}function remoteConnect(db, coll, primaryKey, uri){
const authenticator = new Gremlin.driver.auth.PlainTextSaslAuthenticator(`/dbs/${db}/colls/${coll}`, primaryKey)
const client = new Gremlin.driver.Client(
uri,
{
authenticator,
traversalsource : "g",
rejectUnauthorized : true,
mimeType : "application/vnd.gremlin-v2.0+json"
}
);
mogwai.client = client;
return client;
}
