node-red-contrib-pubsubhub 0.0.2
Node-RED pubsub publish/sunscribe functions
node-red-contrib-pubsubhub
Provided publish/subscribe frame work with nodered. This allows for complete independence of development between flows and allowing dynamic growth. Helpful with complex flows. Pause/resume facility allows process flows to be bypassed dynamically. A message can be processed by multiple flows as clones or as same message.
Publish
Simply publishes a message to the message hub using a topic which can be predefined or used topic of message.
Subscribe
Registers interest in a topic. More than one node can register an interest. Message can be cloned to ensure not impacted by other subscribers. Subscriber nodes can be pooled to the one id for a topic leaf so they round robin so only one processes a message.
Pause/Resume Subscription
It is possible to pause and resume a subscription. Note it means messages that would have been processed are are lost unless pooled which mean processed by another subscribe node in the pool.
Hub
Future Improvements
- connect to other nodered instances
- Start subscribe in paused state
- Allow pass thru message to be held back until triggered by a subscription
Install
Run the following command in the root directory of your Node-RED install or via GUI install
npm install node-red-contrib-pubsubhub
Version
0.0.2 Initial release
