node-red-contrib-ack
A Node-RED node for verifying that a message is processed.
Install
Run the following command in the root directory of your Node-RED install
npm install node-red-contrib-ack
Usage
Any message that enters the ack start node will be stored internally in a queue with a specified timeout (Time to live), and is then passed on through the msg line. If the message does not reach an ack clear node before the timeout passes, the ack start node will emit the message on it's timeout line, and the message will be removed from the queue.
If the persistent option is set and the server is reboot or redeployed while the ack start node has messages stored, they will be emitted on the boot line at startup. If those messages have also timed out they will be emitted on the timeout line as well.
Acknowledgements
The node-red-contrib-ack uses the following open source
Node link concept sourced from