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gremlin-loader

v0.0.2

Published

A Webpack loader for Gremlin Groovy files

Downloads

2

Readme

gremlin-loader

A Gremlin (Groovy) webpack loader.

gremlin-loader allows you to define Gremlin queries in Groovy files and load them within your Node.js environment as JavaScript functions.

This loader is meant to be used server-side with babel-plugin-webpack-loaders.

This is highly experimental and shouldn't be used in production.

Installation

npm install gremlin-loader --save

To make babel-plugin-webpack-loaders work, your .babelrc file should resemble the following:

{
  "presets": ["es2015"],
  "plugins": [
    ["babel-plugin-webpack-loaders", {
      "config": "./webpack.config.babel.js",
      "verbose": false,
    }]
  ]
}

And the corresponding webpack.config.babel.js file:

const config = {
  output: {
    libraryTarget: 'commonjs2',
  },
  resolve: {
    extensions: ['', '.js', '.gremlin']
  },
  module: {
    loaders: [
      {
        test: /\.gremlin$/,
        loader: 'gremlin'
      }
    ]
  }
};

export default config;

Usage

Once configured, you can do the following:

queries.gremlin file:

def fetchAllByName = { userName ->
  g.V().has('name', userName)
}

application.js file:

import { fetchAllByName } from './queries';

const byNameQuery = fetchAllByName('Alice');
// byNameQuery is an object with 'gremlin' and 'bindings' keys:
// {
//   gremlin: 'def fetchAllByName = { userName ->  g.V().has(\'name\', userName)}\n;fetchAllByName(userName)',
//   bindings: { userName: 'Alice' }
// }

When used in conjunction with gremlin-javascript:

import { createClient } from 'gremlin';

const client = createClient();

const query = fetchAllByName('Alice');
client.execute(query, (err, results) => {
  // handle err or results
});