Add custom notification handler

You can add an executor, which sends a (or multiple) notification, in the same way like described for custom export formatter.

To register your executor you need to add following entry to the di.xml of your module:

app/code/MyModule/CustomOrderExportNotification/etc/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="TechDivision\PacemakerOrderExport\Model\NotificationHandlerProvider">
        <arguments>
            <argument name="notificationHandlerList" xsi:type="array">
                <item name="my_custom_notification" xsi:type="array">
                    <item name="code" xsi:type="string">my_custom_notification</item>
                    <item name="label" xsi:type="string">My Custom Notification</item>
                    <item name="type" xsi:type="string">MyModule\CustomOrderExportNotification\Model\MyExecutor</item>
                </item>
            </argument>
        </arguments>
    </type>
</config>

Examples

Checkout following resource for an example module.