neptune-lambda-client

neptune-lambda-client

Overview

A very simple Gremlin client to robustly query AWS Neptune from AWS Lambda. The client will automatically reestablish a connection to the database if the web socket connection closes and will also automatically retry (5 times) when it encounters ConcurrentModificationException and ReadOnlyViolationException errors.

Usage

This client is instantiated with a factory function and exposes a single function called query. query accepts a single argument, which is a function that use the Gremlin g object.

const gremlinClient = require('neptune-lambda-client');

const {query} = gremlinClient.create({
    host: 'neptune-db-url',
    port: '8182',
    useIam: true
});

async function getNode(id) {
    return query(async g => g.V(id).next().then(x => x.value));
}