Make it possible to re-configure roles

adc2019system.py

@@ -26,6 +26,9 @@ def load_config(path):
 def set_role(role_name, config_data):
     global role
 
+    if role is not None:
+        del role
+
     if role_name == 'host':
         role = Host(config_data)
     elif role_name == 'solver':
@@ -34,14 +37,17 @@ def set_role(role_name, config_data):
 def call_api(method, cmd, params):
 
     print(f'I: API Received: {cmd}')
-    if role is not None:
-        return role.call_api(method, cmd, params)
-    else:
     if cmd == 'role':
         if method == 'POST':
             set_role(params['role'], params)
             return {'role': role.type}
         else:
+            if role is None:
                 return {'role': 'Undefined'}
+            else:
+                return {'role': self.type}
+    else:
+        if role is not None:
+            return role.call_api(method, cmd, params)
         else:
             return None

roles/solver.py

@@ -17,6 +17,9 @@ class Solver(object):
         self.solver = importlib.import_module(f"solvers.{config['solver']}")
         self.thread = None
     
+    def __del__(self):
+        self.stop_solver()
+
     def __repr__(self):
         return "Solver"