Bubble Launcher custom indexer example (customer groups indexation)

config.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- app/code/local/Namespace/Module/etc/config.xml -->
<config>
    <modules>
        <Namespace_Module> <!-- module name -->
            <version>0.1.0</version>
        </Namespace_Module>
    </modules>
    <global>
        <models>
            <namespace_module> <!-- used in launcher.xml -->
                <class>Namespace_Module_Model</class> <!-- used to find group indexer -->
            </namespace_module>
        </models>
    </global>
</config>

Group.php

<?php

// app/code/local/Namespace/Module/Model/Indexer/Group.php

class Namespace_Module_Model_Indexer_Group extends Bubble_Launcher_Model_Indexer_Abstract
{
    protected function _buildIndexData()
    {
        $data = array();
        $collection = Mage::getModel('customer/group')->getCollection();
        $menuLabel = Mage::helper('adminhtml')->__('Customer Groups');
        foreach ($collection as $group) {
            /** @var $group Mage_Customer_Model_Group */
            $title  = sprintf('%s', $group->getCustomerGroupCode());
            $text   = sprintf('%s > %s', $menuLabel, $group->getCustomerGroupCode());
            $url    = $this->_getUrl('adminhtml/customer_group/edit', array('id' => $group->getId()));
            $data[] = $this->_prepareData($title, $text, $url);
        }

        return $data;
    }
    
    public function canIndex()
    {
        return $this->_isAllowed('customer/group');
    }
}

launcher.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- app/code/local/Namespace/Module/etc/launcher.xml -->
<launcher>
    <indexers>
        <group> <!-- group is the scope -->
            <class>namespace_module/indexer_group</class> <!-- model used for indexation -->
        </group>
    </indexers>
</launcher>

Namespace_Module.xml

<?xml version="1.0"?>
<!-- app/etc/modules/Namespace_Module.xml -->
<config>
    <modules>
        <Namespace_Module>
            <active>true</active>
            <codePool>local</codePool>
        </Namespace_Module>
    </modules>
</config>