Using multiple Database Connections with xPDO

    /**
     * Connect to different database
     */
    public function connect($configFile = '') {
        $configFile = !empty($configFile) ? $configFile : 'dbconnect.php';
        $db = require_once $configFile;
        $dsn = 'mysql:host=' . $db['host'] . ';dbname=' . $db['dbName'] . ';port=' . $db['port'] . ';charset=utf8';
        $connect = $this->modx->addConnection($dsn, $db['username'], $db['password']);
        if ($connect) {
            $this->modx->addPackage('mypackage', $this->config['modelPath'], '');
        }
    }

<model package="mypackage" database="different_database" baseClass="xPDOObject" platform="mysql" defaultEngine="MyISAM" version="1.1">

    /**
     * Connect to different database
     */
    public function connect() {
        if (!$this->_connect) {
            $db = require_once 'dbconnect.php';
            $dsn = 'mysql:host=' . $db['host'] . ';dbname=' . $db['dbName'] . ';port=' . $db['port'] . ';charset=utf8';
            $this->_connect = new xPDO($dsn, $db['username'], $db['password']);

            // $this->modx->log(modX::LOG_LEVEL_ERROR, __LINE__ . ': connect() ' . $this->_connect->connect() ? 'Connected </br>' : 'Not Connected');

            $this->_connect->setPackage('my_package', $this->config['modelPath']);
        }
        return $this->_connect;
    }

<?php

class MembersGetListProcessor extends modObjectGetListProcessor {
    /** @var string $defaultSortField The default field to sort by */
    public $defaultSortField = 'id';
    /** @var string $defaultSortDirection The default direction to sort */
    public $defaultSortDirection = 'ASC';

    /**
     * Get the data of the query
     * @return array
     */
    public function getData() {
        $data = array();
        $limit = intval($this->getProperty('limit'));
        $start = intval($this->getProperty('start'));

        $c = $this->modx->myClass->connect()->newQuery($this->classKey);
        $c = $this->prepareQueryBeforeCount($c);
        $data['total'] = $this->modx->myClass->connect()->getCount($this->classKey,$c);
        $c = $this->prepareQueryAfterCount($c);

        $sortClassKey = $this->getSortClassKey();
        $sortKey = $this->modx->myClass->connect()->getSelectColumns($sortClassKey,$this->getProperty('sortAlias',$sortClassKey),'',array($this->getProperty('sort')));
        if (empty($sortKey)) $sortKey = $this->getProperty('sort');
        $c->sortby($sortKey,$this->getProperty('dir'));
        if ($limit > 0) {
            $c->limit($limit,$start);
        }

        $data['results'] = $this->modx->myClass->connect()->getCollection($this->classKey,$c);
        return $data;
    }

}

return 'MembersGetListProcessor';