API MongoDB Adapter

Requirements

• DADI API Version 3.0.0 or greater
• A running MongoDB server

Usage

To use this adapter with your DADI API installation, you'll need to add it to your API's dependencies:

$ cd my-api
$ npm install @dadi/api-mongodb

Tests

To run the test suite you'll need a MongoDB server running on localhost with the default port of 27017. If you've changed the default port, modify the test configuration file at config/mongodb.test.json. This file is created from config/mongodb.test.json.sample the first time the test suite is run.

Run the tests:

$ git clone https://github.com/dadi/api-mongodb.git
$ cd api-mongodb
$ npm test

Configuration

Configuration Files

Configuration settings are defined in JSON files within a /config directory at the root of your API application. DADI API uses a configuration file for the MongoDB connector that matches the environment you are running under.

The naming convention for MongoDB configuration files follows the format mongodb.<environment>.json

Example

Assuming that the entry point for your application is main.js and launching it with the following command, DADI API will attempt to load a MongoDB configuration file named mongodb.production.js.

$ NODE_ENV=production node main.js

Application Anatomy

my-api/
  config/                     # contains environment-specific configuration properties
    config.development.json   # main API configuration file, development environment
    config.production.json
    mongodb.development.json  # MongoDB configuration file, development environment
    mongodb.production.json

  main.js                     # the entry point of the app

  package.json

  workspace/
    collections/              # collection schema files
    endpoints/                # custom Javascript endpoints

Configuration

Specifies the MongoDB database(s) to connect to.

{
  "enableCollectionDatabases": false,
  "databases": [
    {
      "id": "authdb",
      "hosts": "127.0.0.1:27017",
      "username": "johndoe",
      "password": "topsecret"
    },
    {
      "default": true,
      "id": "secondary",
      "hosts": "127.0.0.1:27018"
    }
  ]
}

Configuration Properties

enableCollectionDatabases

Determines whether the database portion of the URL should dictate the actual MongoDB database to be used. When enabled, the request GET /1.0/mydatabase/mycollection would look for documents in a database with the ID mydatabase. If disabled, the default database (i.e. containing the property default: true in the configuration file) will be used.

databases

The list of MongoDB databases to be used, as an array. Each database must be defined as an object with the following properties:

authDatabase

The database to authenticate against when supplying a username and password.

• Format: String
• Default: ''
• Environment variable: DB_{database}_AUTH_SOURCE
• Required: No

authMechanism

If no authentication mechanism is specified or the mechanism DEFAULT is specified, the driver will attempt to authenticate using the SCRAM-SHA-1 authentication method if it is available on the MongoDB server. If the server does not support SCRAM-SHA-1 the driver will authenticate using MONGODB-CR.

• Format: String
• Default: ''
• Environment variable: DB_{database}_AUTH_MECHANISM
• Required: No

default

Whether this database should be used as the default (main) database. When no database has the default flag, the first one in the array will be used as default.

• Format: Boolean
• Default: false
• Environment variable: DB_{database}_DEFAULT
• Required: No

hosts

Comma-separated string of MongoDB hosts, including port (e.g. localhost,localhost:27018,localhost:27019).

• Format: String
• Environment variable: DB_{database}_HOSTS
• Required: Yes

id

Database unique identifier.

• Format: String
• Required: Yes

maxPoolSize

The maximum number of connections in the connection pool.

• Format: Number
• Default: 0
• Environment variable: DB_{database}_MAX_POOL
• Required: No

password

The access password, if one is needed.

• Format: String
• Default: ""
• Environment variable: DB_{database}_PASSWORD
• Required: No

readPreference

How MongoDB routes read operations to the members of a replica set - see https://docs.mongodb.com/manual/reference/read-preference/.

• Format: "primary", "primaryPreferred", "secondary", "secondaryPreferred" or "nearest"
• Default: "secondaryPreferred"
• Required: No

replicaSet

The name of the replica set to identify the hosts.

• Format: String
• Required: No

ssl

Whether to initiate the connection with TLS/SSL.

• Format: Boolean
• Default: false
• Required: No

username

The access username, if one is needed.

• Format: String
• Default: ""
• Environment variable: DB_{database}_USERNAME
• Required: No

Licence

DADI is a data centric development and delivery stack, built specifically in support of the principles of API first and COPE.

Copyright notice (C) 2019 DADI+ Limited [email protected] All rights reserved

This product is part of DADI. DADI is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version ("the GPL").

If you wish to use DADI outside the scope of the GPL, please contact us at [email protected] for details of alternative licence arrangements.

This product may be distributed alongside other components available under different licences (which may not be GPL). See those components themselves, or the documentation accompanying them, to determine what licences are applicable.

DADI is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

The GNU General Public License (GPL) is available at http://www.gnu.org/licenses/gpl-3.0.en.html. A copy can be found in the file GPL.md distributed with these files.

This copyright notice MUST APPEAR in all copies of the product!