How to queue SMTP and OpenHAB Notifications if services are Offline?

[rossko57]

Your first challenge is to determine if the services are available or not. Otherwise you won’t be able to manage any queuing.

Rich’s Gate Keeper design includes an example of queue management

Design Pattern: Gate Keeper

Please see Design Pattern: What is a Design Pattern and How Do I Use Them for a desciption of DPs. [image] Problem Statement There are some technologies that are sensitive to receiving multiple commands too close together. When they occur too close together commands get dropped or other problems may occur. Insteon and 433MHz are two such technologies with this problem. Concept Centralize all the communication with these technologies into a single gatekeeper and add delays between each comma…