Catch the correct exception

Catch the correct exception to fill the response code.
Added test case to test this
Also fixed a minor sandesh file issue.

Change-Id: Id4147ee2034231946f8d1aa051b8c6a7b6064da0
Closes-Bug: 1639079

src/config/api-server/tests/test_crud_basic.py

@@ -4064,6 +4064,30 @@ def test_exclude_types_not_cached(self):
 # end class TestCacheWithMetadataExcludeTypes
 
 
+class TestVncApiStats(test_case.ApiServerTestCase):
+    from cfgm_common.vnc_api_stats import log_api_stats
+    _sandesh = None
+    @log_api_stats
+    def _sample_function(self, obj_type):
+        raise cfgm_common.exceptions.HttpError(409, '')
+
+    def _check_sendwith(self, sandesh, stats, *args):
+        self.assertEqual(stats.response_code, 409)
+        self.assertEqual(stats.obj_type, 'abc')
+
+    def test_response_code_on_exception(self):
+        from cfgm_common.vnc_api_stats import VncApiStatistics
+        try:
+            with test_common.patch(VncApiStatistics, 'sendwith', self._check_sendwith):
+                self._sample_function('abc')
+        except cfgm_common.exceptions.HttpError:
+            pass
+        else:
+            self.assertThat(0, 'Expecting HttpError to be raised, but was not raised')
+    # end test_response_code_on_exception
+# end TestVncApiStats
+
+
 if __name__ == '__main__':
     ch = logging.StreamHandler()
     ch.setLevel(logging.DEBUG)

src/config/common/vnc_api_stats.py

@@ -7,7 +7,7 @@
 
 from uve.vnc_api.ttypes import VncApiStats, VncApiStatsLog
 from pysandesh.gen_py.sandesh.ttypes import SandeshLevel
-
+from exceptions import HttpError
 
 def log_api_stats(func):
     def wrapper(api_server_obj, resource_type, *args, **kwargs):
@@ -18,8 +18,8 @@ def wrapper(api_server_obj, resource_type, *args, **kwargs):
             statistics.response_size = len(str(response))
             statistics.response_code = bottle.response.status_code
             return response
-        except bottle.HTTPError as err_response:
-            statistics.response_size = len(err_response.body)
+        except HttpError as err_response:
+            statistics.response_size = len(str(err_response))
             statistics.response_code = err_response.status_code
             raise
         finally:

src/config/schema-transformer/st_introspect.sandesh

@@ -70,7 +70,7 @@ request sandesh StObjectReq {
 }
 
 struct RefList {
-    1: string object_type (link="StObject");
+    1: string object_type (link="StObjectReq");
     2: list<string> object_fq_name;
 }