confection/storage/new.js

A configuration management server written in node, using redis for a backend.

"use strict";

var mongoose = require( 'mongoose' );
var crypto = require( 'crypto' );
var client = false;
var clientConnectErr = null;
var initCallbacks = [];

module.exports.init = function ( params, callback ) {

	if ( typeof params === 'function' ) {
		callback = params;
		params = {};
	}

	initCallbacks.push( callback );

	function flushCallback( callback, err ) {
		process.nextTick( function () {
			executeCallback( callback, err );
		} );
	}

	function flushInitCallbacks() {
		while ( initCallbacks.length > 0 ) {
			flushCallback( initCallbacks.shift(), clientConnectErr );
		}
	}

	if ( !client ) {

		params = {
			url: null
		}.mixin( params );

		if ( !params.url ) {
			return;
		}

		client = true;
		mongoose.connect( params.url );

		var errorHandler = function () {
			client = null;
			clientConnectErr = 'failed to connect';
			client.removeListener( 'connect', connectHandler );
			flushInitCallbacks();
		};

		var connectHandler = function () {
			clientConnectErr = null;
			client.removeListener( 'error', errorHandler );
			flushInitCallbacks();
		};

		client.on( 'connect', connectHandler );
		client.on( 'error', errorHandler );

	}
	else {
		flushInitCallbacks();
	}

};

function executeCallback() {
	var args = Array.prototype.slice.call( arguments );

	if ( typeof args[0] === 'function' ) {
		args[0].apply( {}, args.slice( 1 ) );
	}
}