From 5b6e11d560e274e8690417b21300ca1a79a24d92 Mon Sep 17 00:00:00 2001
From: "Paul \"LeoNerd\" Evans" <paul@matrix.org>
Date: Tue, 24 Feb 2015 14:30:14 +0000
Subject: [PATCH] Commandline option to enable metrics system

---
 synapse/config/homeserver.py |  4 +++-
 synapse/config/metrics.py    | 31 +++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 1 deletion(-)
 create mode 100644 synapse/config/metrics.py

diff --git a/synapse/config/homeserver.py b/synapse/config/homeserver.py
index c024535f52..241afdf872 100644
--- a/synapse/config/homeserver.py
+++ b/synapse/config/homeserver.py
@@ -23,11 +23,13 @@ from .captcha import CaptchaConfig
 from .email import EmailConfig
 from .voip import VoipConfig
 from .registration import RegistrationConfig
+from .metrics import MetricsConfig
 
 
 class HomeServerConfig(TlsConfig, ServerConfig, DatabaseConfig, LoggingConfig,
                        RatelimitConfig, ContentRepositoryConfig, CaptchaConfig,
-                       EmailConfig, VoipConfig, RegistrationConfig,):
+                       EmailConfig, VoipConfig, RegistrationConfig,
+                       MetricsConfig,):
     pass
 
 
diff --git a/synapse/config/metrics.py b/synapse/config/metrics.py
new file mode 100644
index 0000000000..90aba10bba
--- /dev/null
+++ b/synapse/config/metrics.py
@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+# Copyright 2015 OpenMarket Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from ._base import Config
+
+
+class MetricsConfig(Config):
+    def __init__(self, args):
+        super(MetricsConfig, self).__init__(args)
+        self.enable_metrics = args.enable_metrics
+
+    @classmethod
+    def add_arguments(cls, parser):
+        super(MetricsConfig, cls).add_arguments(parser)
+        metrics_group = parser.add_argument_group("metrics")
+        metrics_group.add_argument(
+            '--enable-metrics', dest="enable_metrics", action="store_true",
+            help="Enable collection and rendering of performance metrics"
+        )