From fc3533bd57676b1ce26442a5af2b60be80aef610 Mon Sep 17 00:00:00 2001
From: Diogo Munaro Vieira <diogo.munaro@olxbr.com>
Date: Mon, 8 Jun 2020 21:25:16 -0300
Subject: [PATCH] Adding only if

---
 .../hooks/metrics/prometheus/__init__.py      | 19 ++++++++++---------
 tests_integration/test_barterdude.py          |  9 +++------
 2 files changed, 13 insertions(+), 15 deletions(-)

diff --git a/barterdude/hooks/metrics/prometheus/__init__.py b/barterdude/hooks/metrics/prometheus/__init__.py
index b3c6196..05bcaaa 100644
--- a/barterdude/hooks/metrics/prometheus/__init__.py
+++ b/barterdude/hooks/metrics/prometheus/__init__.py
@@ -6,7 +6,6 @@
 from barterdude.hooks import HttpHook
 from barterdude.hooks.metrics.prometheus.definitions import Definitions
 from barterdude.hooks.metrics.prometheus.metrics import Metrics
-from barterdude.conf import BARTERDUDE_DEFAULT_APP_NAME
 try:
     from prometheus_client import (
         CollectorRegistry,
@@ -25,12 +24,12 @@ class Prometheus(HttpHook):
     def __init__(
         self,
         barterdude: BarterDude,
-        labels: Optional[dict] = None,
+        labels: dict = {},
         path: str = "/metrics",
         registry: CollectorRegistry = None
     ):
         self.__registry = registry or CollectorRegistry()
-        self.__labels = labels or {"application": BARTERDUDE_DEFAULT_APP_NAME}
+        self.__labels = labels
         self.__metrics = Metrics(self.__registry)
         self.__definitions = Definitions(
             self.__registry, self.__metrics, list(self.__labels.keys())
@@ -45,10 +44,11 @@ def metrics(self):
 
     async def before_consume(self, message: RabbitMQMessage):
         hash_message = id(message)
-        self.metrics[self.__definitions.BEFORE_CONSUME].labels(
-            **self.__labels
-        ).inc()
         self._msg_start[hash_message] = time.time()
+        metric = self.metrics[self.__definitions.BEFORE_CONSUME]
+        if self.__labels:
+            metric = metric.labels(**self.__labels)
+        metric.inc()
 
     async def _on_complete(self,
                            message: RabbitMQMessage,
@@ -72,9 +72,10 @@ async def on_fail(self, message: RabbitMQMessage, error: Exception):
         await self._on_complete(message, self.__definitions.FAIL, error)
 
     async def on_connection_fail(self, error: Exception, retries: int):
-        self.metrics[self.__definitions.CONNECTION_FAIL].labels(
-            **self.__labels
-        ).inc()
+        metric = self.metrics[self.__definitions.CONNECTION_FAIL]
+        if self.__labels:
+            metric = metric.labels(**self.__labels)
+        metric.inc()
 
     async def __call__(self, req: web.Request):
         return web.Response(
diff --git a/tests_integration/test_barterdude.py b/tests_integration/test_barterdude.py
index 187e4ef..2627c59 100644
--- a/tests_integration/test_barterdude.py
+++ b/tests_integration/test_barterdude.py
@@ -8,7 +8,6 @@
 from barterdude.hooks.healthcheck import Healthcheck
 from barterdude.hooks import logging as hook_logging
 from barterdude.hooks.metrics.prometheus import Prometheus
-from barterdude.conf import BARTERDUDE_DEFAULT_APP_NAME
 from tests_unit.helpers import load_fixture
 from tests_integration.helpers import ErrorHook
 from asyncworker.connections import AMQPConnection
@@ -183,18 +182,16 @@ async def handler(message):
                 text = await response.text()
 
         self.assertEqual(status_code, 200)
-        name = BARTERDUDE_DEFAULT_APP_NAME
         self.assertNotEqual(-1, text.find(
-            'barterdude_received_number_before_consume_messages_total'
-            '{application="%s"} 1.0' % name
+            'barterdude_received_number_before_consume_messages_total 1.0'
         ))
         self.assertNotEqual(-1, text.find(
             'barterdude_processing_message_seconds_bucket'
-            '{application="%s",error="",le="0.025",state="success"} 1.0' % name
+            '{error="",le="0.025",state="success"} 1.0'
         ))
         self.assertNotEqual(-1, text.find(
             'barterdude_processing_message_seconds_count'
-            '{application="%s",error="",state="success"} 1.0' % name
+            '{error="",state="success"} 1.0'
         ))
 
     async def test_register_multiple_prometheus_hooks(self):