eximanager/src/service-locator.js

Virtual domains/users manager for Exim

'use strict'

var fs          = require('fs'),
    logger      = require('tracer').console();

function ServiceLocator() {
    this.services = [];
    this.services['logger'] = logger;

    var config, locations = [ __dirname + '/..', '/etc', '/usr/local/etc' ];

    locations.some(function (el) {
        var filename =  el + '/eximanager.conf.js';
        try {
            if (fs.statSync(filename).isFile()) {
                config = require(filename);
                return true;
            }
        } catch (e) {
        }

        return false;
    });

    if (config)
        this.services['config'] = config;

    this.allowOverride = false;
}

module.exports = ServiceLocator;

ServiceLocator.prototype.has = function (name) {
    return typeof this.services[name] != 'undefined';
};

ServiceLocator.prototype.set = function (name, service) {
    if (!this.allowOverride && typeof this.services[name] != 'undefined')
        throw new Error('Service ' + name + ' already exists');

    this.services[name] = service;
};

ServiceLocator.prototype.get = function (name) {
    if (typeof this.services[name] == 'undefined')
        throw new Error('Service ' + name + ' does not exists');

    return this.services[name];
};

ServiceLocator.prototype.setAllowOverride = function (allow) {
    this.allowOverride = allow;
};