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whizzosoftware / WZWave

A native Java library for interfacing with Z-Wave PC controllers
Eclipse Public License 1.0
33 stars 22 forks source link

Why need a store #19

Closed anton-johansson closed 6 years ago

anton-johansson commented 6 years ago

What's the purpose of the store? It's necessary to have one, or the controller won't start. What is it actually storing?

If I would move my application (with lots of devices in use) to another server and lose my store, what would that mean, in practice?

whizzosoftware commented 6 years ago

The store is useful for two reasons: 1) Initial interrogation of Z-Wave devices is an expensive operation -- WZWave stores device metadata so it doesn't have to re-interrogate when the library is restarted. 2) Devices that can sleep (e.g. battery-powered devices) may be offline and won't respond to interrogation requests. In that case, meta-data from the store would be the only way to get any information about the device at library startup time.

whizzosoftware commented 6 years ago

FYI, there is a forum for WZWave available here: https://community.hobson-automation.com/ It might be a better place to have discussions like this. That would keep the issue tracker strictly for items that are identified as needing work.

anton-johansson commented 6 years ago

Allright, thanks for the summary! I guess I'll need to implement my own PersistentStore against my database to keep it portable. :)

You're right. I'll keep discussions & questions in the forums in the future, thanks for the pointer!