Generell:

• open Docker Desktop
• open terminal
  • cd to repo folder
  • docker-compose up --build --scale boerse=1 --scale bank=4

Workaround for following Error Error response from daemon: driver failed programming external connectivity on endpoint vs-praktikum-bank-1 (19a4a9a43ed074d42706cf0a0f4ee6dc3a035b9713626b66b4d2149065a073b7): Bind for 0.0.0.0:22100 failed: port is already allocated

• open docker-compose.yml
• bank: ports. 22100 (random port for multiple instances)

P1:

• see UDP communication in terminal

P2:

• click on port of one bank in Docker Desktop Container
• add /kundenportal or /mitarbeiterportal to the url -> should look e.g. so: http://localhost:51349/kundenportal
• have fun while playing with our kunden-/mitarbeiterportal

• bank starts up
• read csv file
• connect to lookup, connect to Börse
• starting threads for...
  • listen to Börse for trades
  • creates socket
  • wait for and get messages from Börse
  • print out portfolio value and stock values
  • start user interface server for P2
    • handle GET/POST requests (a lot of different APIs, e.g. deposit or withdraw)

• Börse starts up
• read stocks csv
• gets server settings (IP, Port, etc.)
• connect to lookup server
• create datagram socket
• starting threads for...
  • listen for datagrams (saves connected clients, send trades/price changes to all connected clients)
  • random price changes
  • sends keep alive message to all connected clients
  • sends keep alive message to lookup server
  • print out current stock prices

This is a simple Lookup server. Services can register themselves and clients can lookup the server address.

Each service is identified id chosen by the service itself. The service registers what ip and port it is listening on and what type of service it is.

The client can then lookup the service type and get all available services of a certain type.

All communication is using json. The endpoints are:

• POST
  • /register
  • /keepalive
  • /unregister
• GET
  • /services
  • /services?type=<type>
  • /service/<id>