Mqtt

[mjoniec]

**MQTT does not work in project - make it work on localhost

Domain - bad weather generation

• [x] Airports are to randomly set bad weather flag. Randomiser function is to be based on time, not appliction ticks (many tics per second d make all airports have bad weather at all times). triggered in each airport independently. Random seed is to be set in such a way so no more that 2 airports from network at a time are likely to get it. After 10 seconds they are to return to good weather and sent http to traffic api
• [x] Airport services / state machines object managing domain object set up separate mqtt topics to publish messages. Planes listen on mqtt topic of currently selected airport destination. For airport this this needs to be loaded from given name on init. On Plane no config info should exist, it should be dynamically set after selecting new current destination airport (name).

planes notification - 2 cases:

• [x] case1: Plane already on the move - Airports are to notify through MQTT all approaching planes (subscribed to ther messaging topic) that they need to change course. (rest of the planes do not case nor they are bothered with notification - design)
• [x] case 2: Plane when selecting new destination - Airports are to sent http weather info to traffic api (this flow is for planes tat are about to choose next destination)
• [ ] notification message body (contract ?) that airport sends to subscribed planes - the way its designed now simply the fact that a message was received will trigger the airport change. At least add message like "bad weather" and if on it.

[mjoniec]

After debugging session and some investiogation decided to get rid of mqtt. Reasons: During debugging discovered that subscribing to an airport made plane consume all messages from history instead of awaiting for a new ones ocurence. When retention change made, messages were not received at all. Too much trouble, refactored the whole thing into http api, with much simpler code in host services in one hour.

Bad weather functionality switched from planes beeing notified about bad weather to planes asking for a weather info from traffic api.