Add Energy recording support

It adds helpers to send notifications to Energy recording API and
related unit tests.
It requires a dedicated section in functest config file
to set connectivity parameters to Energy recording API.

It is using shared API Recording at http://161.105.253.100:8888

Change-Id: Idcb74d1bf7341ccce7cc1c3926f22338ce24f714
Signed-off-by: Benoit HERARD <benoit.herard@orange.com>

2 files changed, 203 insertions, 0 deletions

diff --git a/functest/energy/__init__.py b/functest/energy/__init__.py
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/functest/energy/__init__.py
diff --git a/functest/energy/energy.py b/functest/energy/energy.py
new file mode 100644
index 00000000..a20c7992
--- /dev/null
+++ b/functest/energy/energy.py
@@ -0,0 +1,203 @@
+#!/usr/bin/env python
+# -*- coding: UTF-8 -*-
+
+# Copyright (c) 2017 Orange and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+
+"""This module manages calls to Energy recording API."""
+
+import json
+import logging
+import urllib
+import requests
+
+import functest.utils.functest_utils as ft_utils
+
+
+def enable_recording(method):
+    """
+    Decorator to record energy during "method" exection.
+
+        param method: Method to suround with start and stop
+        :type method: function
+
+        .. note:: "method" should belong to a class having a "case_name"
+                  attribute
+    """
+    def wrapper(*args):
+        """Wrapper for decorator to handle method arguments."""
+        EnergyRecorder.start(args[0].case_name)
+        return_value = method(*args)
+        EnergyRecorder.stop()
+        return return_value
+    return wrapper
+
+
+# Class to manage energy recording sessions
+class EnergyRecorder(object):
+    """Manage Energy recording session."""
+
+    logger = logging.getLogger(__name__)
+    # Energy recording API connectivity settings
+    # see load_config method
+    energy_recorder_api = None
+
+    # Default initial step
+    INITIAL_STEP = "starting"
+
+    @staticmethod
+    def load_config():
+        """
+        Load connectivity settings from yaml.
+
+        Load connectivity settings to Energy recording API
+        Use functest global config yaml file
+        (see functest_utils.get_functest_config)
+        """
+        # Singleton pattern for energy_recorder_api static member
+        # Load only if not previouly done
+        if EnergyRecorder.energy_recorder_api is None:
+            environment = ft_utils.get_pod_name()
+
+            # API URL
+            energy_recorder_uri = ft_utils.get_functest_config(
+                "energy_recorder.api_url")
+            assert energy_recorder_uri
+            assert environment
+
+            energy_recorder_uri += "/recorders/environment/"
+            energy_recorder_uri += urllib.quote_plus(environment)
+            EnergyRecorder.logger.debug(
+                "API recorder at: " + energy_recorder_uri)
+
+            # Creds
+            user = ft_utils.get_functest_config(
+                "energy_recorder.api_user")
+            password = ft_utils.get_functest_config(
+                "energy_recorder.api_password")
+
+            if user != "" and password != "":
+                energy_recorder_api_auth = (user, password)
+            else:
+                energy_recorder_api_auth = None
+
+            # Final config
+            EnergyRecorder.energy_recorder_api = {
+                "uri": energy_recorder_uri,
+                "auth": energy_recorder_api_auth
+            }
+
+    @staticmethod
+    def start(scenario):
+        """
+        Start a recording session for scenario.
+
+            param scenario: Starting scenario
+            :type scenario: string
+        """
+        return_status = True
+        try:
+            EnergyRecorder.logger.debug("Starting recording")
+            # Ensure that connectyvity settings are loaded
+            EnergyRecorder.load_config()
+
+            # Create API payload
+            payload = {
+                "step": EnergyRecorder.INITIAL_STEP,
+                "scenario": scenario
+            }
+            # Call API to start energy recording
+            response = requests.post(
+                EnergyRecorder.energy_recorder_api["uri"],
+                data=json.dumps(payload),
+                auth=EnergyRecorder.energy_recorder_api["auth"],
+                headers={
+                    'content-type': 'application/json'
+                }
+            )
+            if response.status_code != 200:
+                log_msg = "Error while starting energy recording session\n{}"
+                log_msg = log_msg.format(response.text)
+                EnergyRecorder.logger.info(log_msg)
+                return_status = False
+
+        except Exception:  # pylint: disable=broad-except
+            # Default exception handler to ensure that method
+            # is safe for caller
+            EnergyRecorder.logger.exception(
+                "Error while starting energy recorder API"
+            )
+            return_status = False
+        return return_status
+
+    @staticmethod
+    def stop():
+        """Stop current recording session."""
+        EnergyRecorder.logger.debug("Stopping recording")
+        return_status = True
+        try:
+            # Ensure that connectyvity settings are loaded
+            EnergyRecorder.load_config()
+
+            # Call API to stop energy recording
+            response = requests.delete(
+                EnergyRecorder.energy_recorder_api["uri"],
+                auth=EnergyRecorder.energy_recorder_api["auth"],
+                headers={
+                    'content-type': 'application/json'
+                }
+            )
+            if response.status_code != 200:
+                log_msg = "Error while stating energy recording session\n{}"
+                log_msg = log_msg.format(response.text)
+                EnergyRecorder.logger.error(log_msg)
+                return_status = False
+        except Exception:  # pylint: disable=broad-except
+            # Default exception handler to ensure that method
+            # is safe for caller
+            EnergyRecorder.logger.exception(
+                "Error while stoping energy recorder API"
+            )
+            return_status = False
+        return return_status
+
+    @staticmethod
+    def set_step(step):
+        """Notify energy recording service of current step of the testcase."""
+        EnergyRecorder.logger.debug("Setting step")
+        return_status = True
+        try:
+            # Ensure that connectyvity settings are loaded
+            EnergyRecorder.load_config()
+
+            # Create API payload
+            payload = {
+                "step": step,
+            }
+
+            # Call API to define step
+            response = requests.post(
+                EnergyRecorder.energy_recorder_api["uri"] + "/step",
+                data=json.dumps(payload),
+                auth=EnergyRecorder.energy_recorder_api["auth"],
+                headers={
+                    'content-type': 'application/json'
+                }
+            )
+            if response.status_code != 200:
+                log_msg = "Error while setting current step of testcase\n{}"
+                log_msg = log_msg.format(response.text)
+                EnergyRecorder.logger.error(log_msg)
+                return_status = False
+        except Exception:  # pylint: disable=broad-except
+            # Default exception handler to ensure that method
+            # is safe for caller
+            EnergyRecorder.logger.exception(
+                "Error while setting step on energy recorder API"
+            )
+            return_status = False
+        return return_status