Optional REST based mechanism to set/get Parameters

[notthetup]

We would like to have a REST-based mechanism to set and get parameters on all agents in a MasterContainer.

[notthetup]

Proposed Solution :

• new method on WebServer to enable this feature.
• new REST-based routes
  • get ALL normal parameters on an agent GET /api/<agent-name>
  • get ALL indexed parameters on an agent GET /api/<agent-name>/<index>
  • getting normal parameterGET /api/<agent-name>/<parameter-name>
  • getting indexed parameterGET /api/<agent-name>/<index>/<parameter-name>
  • setting normal parameterSET /api/<agent-name>/<parameter-name>
  • setting indexed parameterSET /api/<agent-name>/<index>/<parameter-name>

We need to figure out how to encode the values and types.

[notthetup]

The awkward bit here to figure out would be threading. Jetty's HTTP handlers run on its internal threads. We'll need a nice mechanism to send/receive fjåge messages from these threads.

A standalone REST Agent that adds a new Handler to the WebServer won't work, since the Handler will get called on the jetty threads, but it's not possible to send messages from those threads since sending messages is only allowed from the Agent's threads.