Socket connection

The server is connected to the node(s) via a SocketIO connection, which is a bidirectional, peristent (event-based) communication line. We use the Flask-SocketIO on the server side and python-socketio on the node (client) side.

Using the websocket connection goes as follows. If you want to send a message from the server to the node, you can do something like:

emit('message', 'some message', room='some_room')

which can be picked up by the node by a function like:

class NodeTaskNamespace(ClientNamespace):
    def on_message(self, message):
        self.log.info(message)