Method to redeploy an EVC

New method to redeploy an EVC. The action is
taken only if the EVC is enabled.
Fixes kytos#31

main.py

@@ -271,6 +271,28 @@ def delete_circuit(self, circuit_id):
         emit_event(self.controller, 'deleted', evc_id=evc.id)
         return jsonify(result), status
 
+    @rest('/v2/evc/<circuit_id>/redeploy', methods=['PATCH'])
+    def redeploy(self, circuit_id):
+        """Endpoint to force the redeployment of an EVC
+        """
+        log.debug('redeploy /v2/evc/%s/redeploy', circuit_id)
+        try:
+            evc = self.circuits[circuit_id]
+        except KeyError:
+            result = f'circuit_id {circuit_id} not found'
+            raise NotFound(result)
+        if evc.is_enabled():
+            with evc.lock:
+                evc.remove_current_flows()
+                evc.deploy()
+            result = {'response': f'Circuit {circuit_id} redeploy received.'}
+            status = 202
+        else:
+            result = {'response': f'Circuit {circuit_id} is disabled.'}
+            status = 409
+
+        return jsonify(result), status
+
     @rest('/v2/evc/schedule', methods=['GET'])
     def list_schedules(self):
         """Endpoint to return all schedules stored for all circuits.
@@ -320,7 +342,7 @@ def create_schedule(self):
         """
         log.debug('create_schedule /v2/evc/schedule/')
 
-        json_data = self.json_from_request('create_schedule')
+        json_data = self._json_from_request('create_schedule')
         try:
             circuit_id = json_data['circuit_id']
         except TypeError:
@@ -407,7 +429,7 @@ def update_schedule(self, schedule_id):
             log.debug('update_schedule result %s %s', result, 403)
             raise Forbidden(result)
 
-        data = self.json_from_request('update_schedule')
+        data = self._json_from_request('update_schedule')
 
         new_schedule = CircuitSchedule.from_dict(data)
         new_schedule.id = found_schedule.id
@@ -702,7 +724,7 @@ def _get_circuits_buffer(self):
         return self.circuits
 
     @staticmethod
-    def json_from_request(caller):
+    def _json_from_request(caller):
         """Return a json from request.
 
         If it was not possible to get a json from the request, log, for debug,

tests/unit/test_main.py

@@ -60,6 +60,9 @@ def test_verify_api_urls(self):
             ({'circuit_id': '[circuit_id]'}, {'OPTIONS', 'PATCH'},
              '/api/kytos/mef_eline/v2/evc/<circuit_id>'),
 
+            ({'circuit_id': '[circuit_id]'}, {'OPTIONS', 'PATCH'},
+             '/api/kytos/mef_eline/v2/evc/<circuit_id>/redeploy'),
+
             ({}, {'OPTIONS', 'GET', 'HEAD'},
              '/api/kytos/mef_eline/v2/evc/schedule'),
 
@@ -712,6 +715,39 @@ def test_load_circuits_by_interface(self):
         # pylint: disable=protected-access
         self.assertEqual(self.napp._circuits_by_interface, expected_result)
 
+    def test_redeploy_evc(self):
+        """Test endpoint to redeploy an EVC."""
+        evc1 = MagicMock()
+        evc1.is_enabled.return_value = True
+        self.napp.circuits = {'1': evc1,
+                              '2': MagicMock()}
+        api = self.get_app_test_client(self.napp)
+        url = f'{self.server_name_url}/v2/evc/1/redeploy'
+        response = api.patch(url)
+        self.assertEqual(response.status_code, 202, response.data)
+
+    def test_redeploy_evc_disabled(self):
+        """Test endpoint to redeploy an EVC."""
+        evc1 = MagicMock()
+        evc1.is_enabled.return_value = False
+        self.napp.circuits = {'1': evc1,
+                              '2': MagicMock()}
+        api = self.get_app_test_client(self.napp)
+        url = f'{self.server_name_url}/v2/evc/1/redeploy'
+        response = api.patch(url)
+        self.assertEqual(response.status_code, 409, response.data)
+
+    def test_redeploy_evc_deleted(self):
+        """Test endpoint to redeploy an EVC."""
+        evc1 = MagicMock()
+        evc1.is_enabled.return_value = True
+        self.napp.circuits = {'1': evc1,
+                              '2': MagicMock()}
+        api = self.get_app_test_client(self.napp)
+        url = f'{self.server_name_url}/v2/evc/3/redeploy'
+        response = api.patch(url)
+        self.assertEqual(response.status_code, 404, response.data)
+
     def test_list_schedules__no_data(self):
         """Test list of schedules."""
         api = self.get_app_test_client(self.napp)