[PMSH] Refactor subscription processor and policy response handler

Signed-off-by: ERIMROB <robertas.rimkus@est.tech>
Change-Id: I91964848df8f7455169650b138b46d8dfc326b6f
Issue-ID: DCAEGEN2-1820

20 files changed, 463 insertions, 358 deletions

diff --git a/components/pm-subscription-handler/.coveragerc b/components/pm-subscription-handler/.coveragerc
index d1c3205b..23af084a 100644
--- a/components/pm-subscription-handler/.coveragerc
+++ b/components/pm-subscription-handler/.coveragerc
@@ -21,6 +21,7 @@
 branch = True
 cover_pylib = False
 include = */pmsh_service/*.py
+omit = pmsh_service/pmsh_service_main.py
 
 [report]
 # Regexes for lines to exclude from consideration
diff --git a/components/pm-subscription-handler/ChangeLog.md b/components/pm-subscription-handler/ChangeLog.md
deleted file mode 100644
index 2d9c89a8..00000000
--- a/components/pm-subscription-handler/ChangeLog.md
+++ /dev/null
@@ -1,10 +0,0 @@
-# Change Log
-
-All notable changes to this project will be documented in this file.
-
-The format is based on [Keep a Changelog](http://keepachangelog.com/)
-and this project adheres to [Semantic Versioning](http://semver.org/).
-
-## [1.0.0]
-
-* Initial release of the PM Subscription Handler.
diff --git a/components/pm-subscription-handler/Changelog.md b/components/pm-subscription-handler/Changelog.md
index 87c282ff..0a849bab 100644
--- a/components/pm-subscription-handler/Changelog.md
+++ b/components/pm-subscription-handler/Changelog.md
@@ -1,7 +1,20 @@
 # Change Log
+
 All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## [1.0.0] - 11/4/2019
\ No newline at end of file
+## [1.0.2]
+### Changed
+* Moved subscription processing from main into its own subscription_handler module
+* Removed policy response handling functions from pmsh_utils and introduced policy_response_handler
+* Network function filter now resides in network_function instead of subscription
+
+## [1.0.1]
+### Fixed
+* Fixed Deletion of Network Function 
+
+## [1.0.0]
+
+* Initial release of the PM Subscription Handler.
diff --git a/components/pm-subscription-handler/pmsh_service/mod/aai_client.py b/components/pm-subscription-handler/pmsh_service/mod/aai_client.py
index f0f20566..489d035b 100755
--- a/components/pm-subscription-handler/pmsh_service/mod/aai_client.py
+++ b/components/pm-subscription-handler/pmsh_service/mod/aai_client.py
@@ -23,8 +23,8 @@ import requests
 from requests.auth import HTTPBasicAuth
 
 import mod.pmsh_logging as logger
-from mod.network_function import NetworkFunction
-from mod.subscription import Subscription, NetworkFunctionFilter
+from mod.network_function import NetworkFunction, NetworkFunctionFilter
+from mod.subscription import Subscription
 
 
 def get_pmsh_subscription_data(cbs_data):
diff --git a/components/pm-subscription-handler/pmsh_service/mod/aai_event_handler.py b/components/pm-subscription-handler/pmsh_service/mod/aai_event_handler.py
index 9d69e760..ee75fbf5 100755
--- a/components/pm-subscription-handler/pmsh_service/mod/aai_event_handler.py
+++ b/components/pm-subscription-handler/pmsh_service/mod/aai_event_handler.py
@@ -20,8 +20,7 @@ import json
 from enum import Enum
 
 from mod import pmsh_logging as logger
-from mod.network_function import NetworkFunction
-from mod.subscription import NetworkFunctionFilter
+from mod.network_function import NetworkFunction, NetworkFunctionFilter
 
 
 class XNFType(Enum):
diff --git a/components/pm-subscription-handler/pmsh_service/mod/config_handler.py b/components/pm-subscription-handler/pmsh_service/mod/config_handler.py
index acf5b76f..26b03153 100755
--- a/components/pm-subscription-handler/pmsh_service/mod/config_handler.py
+++ b/components/pm-subscription-handler/pmsh_service/mod/config_handler.py
@@ -15,6 +15,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 # ============LICENSE_END=====================================================
+
 from os import environ
 
 import requests
diff --git a/components/pm-subscription-handler/pmsh_service/mod/network_function.py b/components/pm-subscription-handler/pmsh_service/mod/network_function.py
index 2150dc28..1cdf57a0 100755
--- a/components/pm-subscription-handler/pmsh_service/mod/network_function.py
+++ b/components/pm-subscription-handler/pmsh_service/mod/network_function.py
@@ -15,6 +15,8 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 # ============LICENSE_END=====================================================
+
+import re
 from mod import pmsh_logging as logger, db
 from mod.db_models import NetworkFunctionModel
 
@@ -85,3 +87,21 @@ class NetworkFunction:
         if nf:
             db.session.delete(nf)
             db.session.commit()
+
+
+class NetworkFunctionFilter:
+    def __init__(self, **kwargs):
+        self.nf_sw_version = kwargs.get('swVersions')
+        self.nf_names = kwargs.get('nfNames')
+        self.regex_matcher = re.compile('|'.join(raw_regex for raw_regex in self.nf_names))
+
+    def is_nf_in_filter(self, nf_name):
+        """Match the nf name against regex values in Subscription.nfFilter.nfNames
+
+        Args:
+            nf_name: the AAI nf name.
+
+        Returns:
+            bool: True if matched, else False.
+        """
+        return self.regex_matcher.search(nf_name)
diff --git a/components/pm-subscription-handler/pmsh_service/mod/pmsh_utils.py b/components/pm-subscription-handler/pmsh_service/mod/pmsh_utils.py
index c8b3bc77..1fc3a097 100755
--- a/components/pm-subscription-handler/pmsh_service/mod/pmsh_utils.py
+++ b/components/pm-subscription-handler/pmsh_service/mod/pmsh_utils.py
@@ -15,18 +15,12 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 # ============LICENSE_END=====================================================
-import json
-import threading
-import uuid
-from threading import Timer
 
+import uuid
 import requests
-from requests.auth import HTTPBasicAuth
-from tenacity import retry, wait_fixed, retry_if_exception_type
-
 import mod.pmsh_logging as logger
-from mod.network_function import NetworkFunction
-from mod.subscription import Subscription, SubNfState, AdministrativeState
+from requests.auth import HTTPBasicAuth
+from threading import Timer
 
 
 class AppConfig:
@@ -179,74 +173,6 @@ class _MrSub(_DmaapMrClient):
             logger.debug(e)
         return topic_data
 
-    @staticmethod
-    def _handle_response(subscription_name, administrative_state, nf_name, response_message):
-        """
-        Handles the response from Policy, updating the DB
-
-        Args:
-            subscription_name (str): The subscription name
-            administrative_state (str): The administrative state of the subscription
-            nf_name (str): The network function name
-            response_message (str): The message in the response regarding the state (success|failed)
-        """
-        logger.debug(f'Response from MR: Sub: {subscription_name} for '
-                     f'NF: {nf_name} received, updating the DB')
-        try:
-            sub_nf_status = subscription_nf_states[administrative_state][response_message].value
-            policy_response_handle_functions[administrative_state][response_message](
-                subscription_name=subscription_name, status=sub_nf_status, nf_name=nf_name)
-        except Exception as err:
-            raise Exception(f'Error changing nf_sub status in the DB: {err}')
-
-    @retry(wait=wait_fixed(5), retry=retry_if_exception_type(Exception))
-    def poll_policy_topic(self, subscription_name, app):
-        """
-        This method polls MR for response from policy. It checks whether the message is for the
-        relevant subscription and then handles the response
-
-        Args:
-            subscription_name (str): The subscription name
-            app (app): Needed to push context for the db
-        """
-        app.app_context().push()
-        administrative_state = Subscription.get(subscription_name).status
-        try:
-            response_data = self.get_from_topic('policy_response_consumer')
-            for data in response_data:
-                data = json.loads(data)
-                if data['status']['subscriptionName'] == subscription_name:
-                    nf_name = data['status']['nfName']
-                    response_message = data['status']['message']
-                    self._handle_response(subscription_name, administrative_state,
-                                          nf_name, response_message)
-            threading.Timer(5, self.poll_policy_topic, [subscription_name, app]).start()
-        except Exception as err:
-            raise Exception(f'Error trying to poll MR: {err}')
-
-
-subscription_nf_states = {
-    AdministrativeState.LOCKED.value: {
-        'success': SubNfState.CREATED,
-        'failed': SubNfState.DELETE_FAILED
-    },
-    AdministrativeState.UNLOCKED.value: {
-        'success': SubNfState.CREATED,
-        'failed': SubNfState.CREATE_FAILED
-    }
-}
-
-policy_response_handle_functions = {
-    AdministrativeState.LOCKED.value: {
-        'success': NetworkFunction.delete,
-        'failed': Subscription.update_sub_nf_status
-    },
-    AdministrativeState.UNLOCKED.value: {
-        'success': Subscription.update_sub_nf_status,
-        'failed': Subscription.update_sub_nf_status
-    }
-}
-
 
 class PeriodicTask(Timer):
     """
diff --git a/components/pm-subscription-handler/pmsh_service/mod/policy_response_handler.py b/components/pm-subscription-handler/pmsh_service/mod/policy_response_handler.py
new file mode 100644
index 00000000..aa5a8cb8
--- /dev/null
+++ b/components/pm-subscription-handler/pmsh_service/mod/policy_response_handler.py
@@ -0,0 +1,84 @@
+# ============LICENSE_START===================================================
+#  Copyright (C) 2020 Nordix Foundation.
+# ============================================================================
+# 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.
+#
+# SPDX-License-Identifier: Apache-2.0
+# ============LICENSE_END=====================================================
+
+import json
+
+from tenacity import retry, wait_fixed, retry_if_exception_type
+
+import mod.pmsh_logging as logger
+from mod.network_function import NetworkFunction
+from mod.subscription import Subscription, AdministrativeState, subscription_nf_states
+
+
+policy_response_handle_functions = {
+    AdministrativeState.LOCKED.value: {
+        'success': NetworkFunction.delete,
+        'failed': Subscription.update_sub_nf_status
+    },
+    AdministrativeState.UNLOCKED.value: {
+        'success': Subscription.update_sub_nf_status,
+        'failed': Subscription.update_sub_nf_status
+    }
+}
+
+
+class PolicyResponseHandler:
+    def __init__(self, mr_sub, subscription_name, app):
+        self.mr_sub = mr_sub
+        self.subscription_name = subscription_name
+        self.app = app
+
+    @retry(wait=wait_fixed(5), retry=retry_if_exception_type(Exception))
+    def poll_policy_topic(self):
+        """
+        This method polls MR for response from policy. It checks whether the message is for the
+        relevant subscription and then handles the response
+        """
+        self.app.app_context().push()
+        administrative_state = Subscription.get(self.subscription_name).status
+        try:
+            response_data = self.mr_sub.get_from_topic('policy_response_consumer')
+            for data in response_data:
+                data = json.loads(data)
+                if data['status']['subscriptionName'] == self.subscription_name:
+                    nf_name = data['status']['nfName']
+                    response_message = data['status']['message']
+                    self._handle_response(self.subscription_name, administrative_state,
+                                          nf_name, response_message)
+        except Exception as err:
+            raise Exception(f'Error trying to poll policy response topic on MR: {err}')
+
+    @staticmethod
+    def _handle_response(subscription_name, administrative_state, nf_name, response_message):
+        """
+        Handles the response from Policy, updating the DB
+
+        Args:
+            subscription_name (str): The subscription name
+            administrative_state (str): The administrative state of the subscription
+            nf_name (str): The network function name
+            response_message (str): The message in the response regarding the state (success|failed)
+        """
+        logger.debug(f'Response from MR: Sub: {subscription_name} for '
+                     f'NF: {nf_name} received, updating the DB')
+        try:
+            sub_nf_status = subscription_nf_states[administrative_state][response_message].value
+            policy_response_handle_functions[administrative_state][response_message](
+                subscription_name=subscription_name, status=sub_nf_status, nf_name=nf_name)
+        except Exception as err:
+            raise Exception(f'Error changing nf_sub status in the DB: {err}')
diff --git a/components/pm-subscription-handler/pmsh_service/mod/subscription.py b/components/pm-subscription-handler/pmsh_service/mod/subscription.py
index 5449f420..99a787da 100755
--- a/components/pm-subscription-handler/pmsh_service/mod/subscription.py
+++ b/components/pm-subscription-handler/pmsh_service/mod/subscription.py
@@ -15,13 +15,14 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 # ============LICENSE_END=====================================================
-import re
+
 from enum import Enum
 
+from tenacity import retry, retry_if_exception_type, wait_exponential, stop_after_attempt
+
 import mod.pmsh_logging as logger
 from mod import db
 from mod.db_models import SubscriptionModel, NfSubRelationalModel
-from tenacity import retry, retry_if_exception_type, wait_exponential, stop_after_attempt
 
 
 class SubNfState(Enum):
@@ -37,6 +38,18 @@ class AdministrativeState(Enum):
     LOCKED = 'LOCKED'
 
 
+subscription_nf_states = {
+    AdministrativeState.LOCKED.value: {
+        'success': SubNfState.CREATED,
+        'failed': SubNfState.DELETE_FAILED
+    },
+    AdministrativeState.UNLOCKED.value: {
+        'success': SubNfState.CREATED,
+        'failed': SubNfState.CREATE_FAILED
+    }
+}
+
+
 class Subscription:
     def __init__(self, **kwargs):
         self.subscriptionName = kwargs.get('subscriptionName')
@@ -205,21 +218,3 @@ class Subscription:
             update({NfSubRelationalModel.nf_sub_status: status}, synchronize_session='evaluate')
 
         db.session.commit()
-
-
-class NetworkFunctionFilter:
-    def __init__(self, **kwargs):
-        self.nf_sw_version = kwargs.get('swVersions')
-        self.nf_names = kwargs.get('nfNames')
-        self.regex_matcher = re.compile('|'.join(raw_regex for raw_regex in self.nf_names))
-
-    def is_nf_in_filter(self, nf_name):
-        """Match the nf name against regex values in Subscription.nfFilter.nfNames
-
-        Args:
-            nf_name: the AAI nf name.
-
-        Returns:
-            bool: True if matched, else False.
-        """
-        return self.regex_matcher.search(nf_name)
diff --git a/components/pm-subscription-handler/pmsh_service/mod/subscription_handler.py b/components/pm-subscription-handler/pmsh_service/mod/subscription_handler.py
new file mode 100644
index 00000000..a615aa77
--- /dev/null
+++ b/components/pm-subscription-handler/pmsh_service/mod/subscription_handler.py
@@ -0,0 +1,59 @@
+# ============LICENSE_START===================================================
+#  Copyright (C) 2020 Nordix Foundation.
+# ============================================================================
+# 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.
+#
+# SPDX-License-Identifier: Apache-2.0
+# ============LICENSE_END=====================================================
+
+import mod.aai_client as aai
+import mod.pmsh_logging as logger
+from mod.subscription import AdministrativeState
+
+
+class SubscriptionHandler:
+    def __init__(self, config_handler, administrative_state, mr_pub,
+                 aai_event_thread, app, app_conf):
+        self.config_handler = config_handler
+        self.administrative_state = administrative_state
+        self.mr_pub = mr_pub
+        self.aai_event_thread = aai_event_thread
+        self.app = app
+        self.app_conf = app_conf
+
+    def execute(self):
+        """
+        Checks for changes of administrative state in config and proceeds to process
+        the Subscription if a change has occurred
+        """
+        self.app.app_context().push()
+        config = self.config_handler.get_config()
+        new_administrative_state = config['policy']['subscription']['administrativeState']
+
+        try:
+            if self.administrative_state == new_administrative_state:
+                logger.debug('Administrative State did not change in the Config')
+            else:
+                sub, network_functions = aai.get_pmsh_subscription_data(config)
+                self.administrative_state = new_administrative_state
+                sub.process_subscription(network_functions, self.mr_pub, self.app_conf)
+
+                if new_administrative_state == AdministrativeState.UNLOCKED.value:
+                    logger.debug('Listening to AAI-EVENT topic in MR.')
+                    self.aai_event_thread.start()
+                else:
+                    logger.debug('Stop listening to AAI-EVENT topic in MR.')
+                    self.aai_event_thread.cancel()
+
+        except Exception as err:
+            logger.debug(f'Error occurred during the activation/deactivation process {err}')
diff --git a/components/pm-subscription-handler/pmsh_service/pmsh_service_main.py b/components/pm-subscription-handler/pmsh_service/pmsh_service_main.py
index 8245466b..af5aece2 100755
--- a/components/pm-subscription-handler/pmsh_service/pmsh_service_main.py
+++ b/components/pm-subscription-handler/pmsh_service/pmsh_service_main.py
@@ -15,61 +15,18 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 # ============LICENSE_END=====================================================
+
 import sys
-import threading
 
 import mod.aai_client as aai
 import mod.pmsh_logging as logger
 from mod import db, create_app, launch_api_server
-from mod.aai_event_handler import process_aai_events
 from mod.config_handler import ConfigHandler
 from mod.pmsh_utils import AppConfig, PeriodicTask
+from mod.policy_response_handler import PolicyResponseHandler
 from mod.subscription import Subscription, AdministrativeState
-
-
-def subscription_processor(config_handler, administrative_state, mr_pub, app,
-                           mr_aai_event_subscriber):
-    """
-    Checks for changes of administrative state in config and proceeds to process
-    the Subscription if a change has occurred
-
-    Args:
-        config_handler (ConfigHandler): Configuration Handler used to get config
-        administrative_state (str): The administrative state
-        mr_pub (_MrPub): MR publisher
-        app (db): DB application
-        mr_aai_event_subscriber (_MrSub): AAI events MR subscriber
-    """
-    app.app_context().push()
-    config = config_handler.get_config()
-    app_conf = AppConfig(**config['config'])
-    new_administrative_state = config['policy']['subscription']['administrativeState']
-    polling_period = 30.0
-
-    try:
-        if administrative_state == new_administrative_state:
-            logger.debug('Administrative State did not change in the Config')
-        else:
-            logger.debug(f'Administrative State changed from "{administrative_state}" "to '
-                         f'"{new_administrative_state}".')
-            sub, nfs = aai.get_pmsh_subscription_data(config)
-            sub.process_subscription(nfs, mr_pub, app_conf)
-            aai_event_thread = PeriodicTask(10, process_aai_events, args=(
-                mr_aai_event_subscriber, sub, mr_pub, app, app_conf))
-
-            if new_administrative_state == AdministrativeState.UNLOCKED.value:
-                logger.debug('Listening to AAI-EVENT topic in MR.')
-                aai_event_thread.start()
-            else:
-                logger.debug('Stopping to listen to AAI-EVENT topic in MR.')
-                aai_event_thread.cancel()
-
-    except Exception as err:
-        logger.debug(f'Error occurred during the activation/deactivation process {err}')
-
-    threading.Timer(polling_period, subscription_processor,
-                    [config_handler, new_administrative_state, mr_pub, app,
-                     mr_aai_event_subscriber]).start()
+from mod.subscription_handler import SubscriptionHandler
+from mod.aai_event_handler import process_aai_events
 
 
 def main():
@@ -81,21 +38,24 @@ def main():
         app.app_context().push()
         db.create_all(app=app)
         sub, nfs = aai.get_pmsh_subscription_data(config)
-        mr_pub = app_conf.get_mr_pub('policy_pm_publisher')
-        mr_sub = app_conf.get_mr_sub('policy_pm_subscriber')
-        mr_aai_event_subscriber = app_conf.get_mr_sub('aai_subscriber')
-        initial_start_delay = 5.0
-
-        administrative_state = AdministrativeState.LOCKED.value
+        policy_mr_pub = app_conf.get_mr_pub('policy_pm_publisher')
+        policy_mr_sub = app_conf.get_mr_sub('policy_pm_subscriber')
+        mr_aai_event_sub = app_conf.get_mr_sub('aai_subscriber')
         subscription_in_db = Subscription.get(sub.subscriptionName)
-        if subscription_in_db is not None:
-            administrative_state = subscription_in_db.status
+        administrative_state = subscription_in_db.status if subscription_in_db \
+            else AdministrativeState.LOCKED.value
+
+        aai_event_thread = PeriodicTask(10, process_aai_events,
+                                        args=(mr_aai_event_sub, sub, policy_mr_pub, app, app_conf))
+        subscription_handler = SubscriptionHandler(config_handler, administrative_state,
+                                                   policy_mr_pub, aai_event_thread, app, app_conf)
+        policy_response_handler = PolicyResponseHandler(policy_mr_sub, sub.subscriptionName, app)
 
-        threading.Timer(initial_start_delay, subscription_processor,
-                        [config_handler, administrative_state, mr_pub,
-                         app, mr_aai_event_subscriber]).start()
+        subscription_handler_thread = PeriodicTask(30, subscription_handler.execute)
+        policy_response_handler_thread = PeriodicTask(5, policy_response_handler.poll_policy_topic)
 
-        threading.Timer(20.0, mr_sub.poll_policy_topic, [sub.subscriptionName, app]).start()
+        subscription_handler_thread.start()
+        policy_response_handler_thread.start()
 
         launch_api_server(app_conf)
 
diff --git a/components/pm-subscription-handler/pom.xml b/components/pm-subscription-handler/pom.xml
index 04d6fac4..64d35056 100644
--- a/components/pm-subscription-handler/pom.xml
+++ b/components/pm-subscription-handler/pom.xml
@@ -31,7 +31,7 @@
   <groupId>org.onap.dcaegen2.services</groupId>
   <artifactId>pmsh</artifactId>
   <name>dcaegen2-services-pm-subscription-handler</name>
-  <version>1.0.1-SNAPSHOT</version>
+  <version>1.0.2-SNAPSHOT</version>
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <sonar.sources>.</sonar.sources>
diff --git a/components/pm-subscription-handler/tests/test_healthcheck.py b/components/pm-subscription-handler/tests/test_healthcheck.py
index 6e960d05..1c40c3ff 100755
--- a/components/pm-subscription-handler/tests/test_healthcheck.py
+++ b/components/pm-subscription-handler/tests/test_healthcheck.py
@@ -18,7 +18,7 @@
 
 import unittest
 
-from pmsh_service.mod.healthcheck import status
+from mod.healthcheck import status
 
 
 class HealthcheckTestCase(unittest.TestCase):
diff --git a/components/pm-subscription-handler/tests/test_pmsh_service.py b/components/pm-subscription-handler/tests/test_pmsh_service.py
deleted file mode 100644
index cd28a5d9..00000000
--- a/components/pm-subscription-handler/tests/test_pmsh_service.py
+++ /dev/null
@@ -1,88 +0,0 @@
-# ============LICENSE_START===================================================
-#  Copyright (C) 2020 Nordix Foundation.
-# ============================================================================
-# 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.
-#
-# SPDX-License-Identifier: Apache-2.0
-# ============LICENSE_END=====================================================
-import os
-import json
-from unittest import TestCase
-from unittest.mock import patch
-
-import pmsh_service_main as pmsh_service
-from mod.network_function import NetworkFunction
-
-
-class PMSHServiceTest(TestCase):
-
-    @patch('mod.create_app')
-    @patch('mod.subscription.Subscription')
-    @patch('mod.pmsh_utils._MrPub')
-    @patch('mod.config_handler.ConfigHandler')
-    def setUp(self, mock_config_handler, mock_mr_pub,
-              mock_sub, mock_app):
-        with open(os.path.join(os.path.dirname(__file__), 'data/cbs_data_1.json'), 'r') as data:
-            self.cbs_data_1 = json.load(data)
-        self.mock_app = mock_app
-        self.mock_sub = mock_sub
-        self.mock_mr_pub = mock_mr_pub
-        self.mock_config_handler = mock_config_handler
-        self.mock_aai_sub = mock_sub
-        self.nf_1 = NetworkFunction(nf_name='pnf_1')
-        self.nf_2 = NetworkFunction(nf_name='pnf_2')
-        self.nfs = [self.nf_1, self.nf_2]
-
-    @patch('threading.Timer')
-    @patch('mod.aai_client.get_pmsh_subscription_data')
-    @patch('pmsh_service_main.PeriodicTask')
-    @patch('pmsh_service_main.AppConfig')
-    def test_subscription_processor_changed_state(self, mock_app_conf, periodic_task, mock_get_aai,
-                                                  mock_thread):
-        self.mock_config_handler.get_config.return_value = self.cbs_data_1
-        mock_get_aai.return_value = self.mock_sub, self.nfs
-        mock_thread.start.return_value = 1
-        periodic_task.start.return_value = 1
-
-        pmsh_service.subscription_processor(self.mock_config_handler, 'LOCKED',
-                                            self.mock_mr_pub, self.mock_app, self.mock_aai_sub)
-
-        self.mock_sub.process_subscription.assert_called_with(self.nfs, self.mock_mr_pub,
-                                                              mock_app_conf.return_value)
-
-    @patch('threading.Timer')
-    @patch('mod.pmsh_logging.debug')
-    @patch('mod.aai_client.get_pmsh_subscription_data')
-    def test_subscription_processor_unchanged_state(self, mock_get_aai, mock_logger, mock_thread):
-        self.mock_config_handler.get_config.return_value = self.cbs_data_1
-        mock_get_aai.return_value = self.mock_sub, self.nfs
-        mock_thread.start.return_value = 1
-
-        pmsh_service.subscription_processor(self.mock_config_handler, 'UNLOCKED', self.mock_mr_pub,
-                                            self.mock_app, self.mock_aai_sub)
-
-        mock_logger.assert_called_with('Administrative State did not change in the Config')
-
-    @patch('threading.Timer')
-    @patch('mod.pmsh_logging.debug')
-    @patch('mod.aai_client.get_pmsh_subscription_data')
-    def test_subscription_processor_exception(self, mock_get_aai, mock_logger, mock_thread):
-        self.mock_config_handler.get_config.return_value = self.cbs_data_1
-        mock_get_aai.return_value = self.mock_sub, self.nfs
-        mock_thread.start.return_value = 1
-        self.mock_sub.process_subscription.side_effect = Exception
-
-        pmsh_service.subscription_processor(self.mock_config_handler, 'LOCKED', self.mock_mr_pub,
-                                            self.mock_app, self.mock_aai_sub)
-        mock_logger.assert_called_with(f'Error occurred during the '
-                                       f'activation/deactivation process ')
diff --git a/components/pm-subscription-handler/tests/test_pmsh_utils.py b/components/pm-subscription-handler/tests/test_pmsh_utils.py
index ea657f49..236331b4 100644
--- a/components/pm-subscription-handler/tests/test_pmsh_utils.py
+++ b/components/pm-subscription-handler/tests/test_pmsh_utils.py
@@ -23,13 +23,10 @@ from unittest.mock import patch
 
 import responses
 from requests import Session
-from tenacity import stop_after_attempt
 
 from mod import db, get_db_connection_url, create_app
-from mod.db_models import SubscriptionModel
-from mod.pmsh_utils import AppConfig, policy_response_handle_functions
+from mod.pmsh_utils import AppConfig
 from mod.subscription import Subscription
-from mod.network_function import NetworkFunction
 
 
 class PmshUtilsTestCase(TestCase):
@@ -126,93 +123,3 @@ class PmshUtilsTestCase(TestCase):
         self.env.set('PMSH_PG_PASSWORD', 'pass')
         with self.assertRaises(Exception):
             get_db_connection_url()
-
-    @patch('mod.pmsh_utils.NetworkFunction.delete')
-    def test_handle_response_locked_success(self, mock_delete):
-        with patch.dict(policy_response_handle_functions, {'LOCKED': {'success': mock_delete}}):
-            administrative_state = 'LOCKED'
-            nf = NetworkFunction(nf_name='nf1')
-            self.policy_mr_sub._handle_response(self.sub.subscriptionName, administrative_state,
-                                                nf.nf_name, 'success')
-
-            mock_delete.assert_called()
-
-    @patch('mod.subscription.Subscription.update_sub_nf_status')
-    def test_handle_response_locked_failed(self, mock_update_sub_nf):
-        with patch.dict(policy_response_handle_functions,
-                        {'LOCKED': {'failed': mock_update_sub_nf}}):
-            administrative_state = 'LOCKED'
-            nf = NetworkFunction(nf_name='nf1')
-            self.policy_mr_sub._handle_response(self.sub.subscriptionName, administrative_state,
-                                                nf.nf_name, 'failed')
-            mock_update_sub_nf.assert_called()
-
-    @patch('mod.subscription.Subscription.update_sub_nf_status')
-    def test_handle_response_unlocked_success(self, mock_update_sub_nf):
-        with patch.dict(policy_response_handle_functions,
-                        {'UNLOCKED': {'success': mock_update_sub_nf}}):
-            nf = NetworkFunction(nf_name='nf1')
-            self.policy_mr_sub._handle_response(self.sub.subscriptionName,
-                                                self.sub.administrativeState,
-                                                nf.nf_name, 'success')
-            mock_update_sub_nf.assert_called()
-
-    @patch('mod.subscription.Subscription.update_sub_nf_status')
-    def test_handle_response_unlocked_failed(self, mock_update_sub_nf):
-        with patch.dict(policy_response_handle_functions,
-                        {'UNLOCKED': {'failed': mock_update_sub_nf}}):
-            nf = NetworkFunction(nf_name='nf1')
-            self.policy_mr_sub._handle_response(self.sub.subscriptionName,
-                                                self.sub.administrativeState,
-                                                nf.nf_name, 'failed')
-            mock_update_sub_nf.assert_called()
-
-    def test_handle_response_exception(self):
-        self.assertRaises(Exception, self.policy_mr_sub._handle_response, 'sub1', 'wrong_state',
-                          'nf1', 'wrong_message')
-
-    @patch('mod.pmsh_utils._MrSub.get_from_topic')
-    @patch('mod.pmsh_utils._MrSub._handle_response')
-    @patch('mod.subscription.Subscription.get')
-    @patch('threading.Timer')
-    def test_poll_policy_topic_calls_methods_correct_sub(self, mock_thread, mock_get_sub,
-                                                         mock_handle_response, mock_get_from_topic):
-        result_data = ['{"name": "ResponseEvent","status": { "subscriptionName": '
-                       '"ExtraPM-All-gNB-R2B", "nfName": "pnf300", "message": "success" } }']
-        mock_get_from_topic.return_value = result_data
-        mock_thread.start.return_value = 1
-        mock_get_sub.return_value = SubscriptionModel(subscription_name='ExtraPM-All-gNB-R2B',
-                                                      status='UNLOCKED')
-        self.policy_mr_sub.poll_policy_topic(self.sub.subscriptionName, self.mock_app)
-
-        mock_get_from_topic.assert_called()
-        mock_handle_response.assert_called_with(self.sub.subscriptionName,
-                                                'UNLOCKED', 'pnf300', 'success')
-
-    @patch('mod.pmsh_utils._MrSub.get_from_topic')
-    @patch('mod.pmsh_utils._MrSub._handle_response')
-    @patch('mod.subscription.Subscription.get')
-    @patch('threading.Timer')
-    def test_poll_policy_topic_no_method_calls_incorrect_sub(self, mock_thread, mock_get_sub,
-                                                             mock_handle_response,
-                                                             mock_get_from_topic):
-        result_data = ['{"name": "ResponseEvent","status": { "subscriptionName": '
-                       '"demo-subscription", "nfName": "pnf300", "message": "success" } }']
-        mock_get_from_topic.return_value = result_data
-        mock_thread.start.return_value = 1
-        mock_get_sub.return_value = SubscriptionModel(subscription_name='ExtraPM-All-gNB-R2B',
-                                                      status='UNLOCKED')
-        self.policy_mr_sub.poll_policy_topic(self.sub, self.mock_app)
-
-        mock_get_from_topic.assert_called()
-        mock_handle_response.assert_not_called()
-
-    @patch('mod.subscription.Subscription.get')
-    @patch('mod.pmsh_utils._MrSub.get_from_topic')
-    def test_poll_policy_topic_exception(self, mock_get_from_topic, mock_get_sub):
-        mock_get_from_topic.return_value = 'wrong_return'
-        mock_get_sub.return_value = SubscriptionModel(subscription_name='ExtraPM-All-gNB-R2B',
-                                                      status='UNLOCKED')
-        self.policy_mr_sub.poll_policy_topic.retry.stop = stop_after_attempt(1)
-
-        self.assertRaises(Exception, self.policy_mr_sub.poll_policy_topic, 'sub1', self.mock_app)
diff --git a/components/pm-subscription-handler/tests/test_policy_response_handler.py b/components/pm-subscription-handler/tests/test_policy_response_handler.py
new file mode 100644
index 00000000..1cf947fb
--- /dev/null
+++ b/components/pm-subscription-handler/tests/test_policy_response_handler.py
@@ -0,0 +1,133 @@
+# ============LICENSE_START===================================================
+#  Copyright (C) 2019-2020 Nordix Foundation.
+# ============================================================================
+# 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.
+#
+# SPDX-License-Identifier: Apache-2.0
+# ============LICENSE_END=====================================================
+import json
+import os
+from unittest import TestCase
+from unittest.mock import patch
+
+from tenacity import stop_after_attempt
+
+from mod.db_models import SubscriptionModel
+from mod.network_function import NetworkFunction
+from mod.subscription import AdministrativeState, SubNfState
+from mod.policy_response_handler import PolicyResponseHandler, policy_response_handle_functions
+
+
+class PolicyResponseHandlerTest(TestCase):
+
+    @patch('mod.create_app')
+    @patch('mod.subscription.Subscription')
+    @patch('mod.pmsh_utils._MrSub')
+    def setUp(self, mock_mr_sub, mock_sub, mock_app):
+        with open(os.path.join(os.path.dirname(__file__), 'data/cbs_data_1.json'), 'r') as data:
+            self.cbs_data = json.load(data)
+        self.mock_policy_mr_sub = mock_mr_sub
+        self.mock_sub = mock_sub
+        self.mock_sub.subscriptionName = 'ExtraPM-All-gNB-R2B'
+        self.mock_app = mock_app
+        self.nf = NetworkFunction(nf_name='nf1')
+        self.policy_response_handler = PolicyResponseHandler(self.mock_policy_mr_sub,
+                                                             self.mock_sub.subscriptionName,
+                                                             self.mock_app)
+
+    @patch('mod.network_function.NetworkFunction.delete')
+    def test_handle_response_locked_success(self, mock_delete):
+        with patch.dict(policy_response_handle_functions,
+                        {AdministrativeState.LOCKED.value: {'success': mock_delete}}):
+            self.policy_response_handler._handle_response(self.mock_sub.subscriptionName,
+                                                          AdministrativeState.LOCKED.value,
+                                                          self.nf.nf_name, 'success')
+
+            mock_delete.assert_called()
+
+    @patch('mod.subscription.Subscription.update_sub_nf_status')
+    def test_handle_response_locked_failed(self, mock_update_sub_nf):
+        with patch.dict(policy_response_handle_functions,
+                        {AdministrativeState.LOCKED.value: {'failed': mock_update_sub_nf}}):
+            self.policy_response_handler._handle_response(self.mock_sub.subscriptionName,
+                                                          AdministrativeState.LOCKED.value,
+                                                          self.nf.nf_name, 'failed')
+            mock_update_sub_nf.assert_called_with(subscription_name=self.mock_sub.subscriptionName,
+                                                  status=SubNfState.DELETE_FAILED.value,
+                                                  nf_name=self.nf.nf_name)
+
+    @patch('mod.subscription.Subscription.update_sub_nf_status')
+    def test_handle_response_unlocked_success(self, mock_update_sub_nf):
+        with patch.dict(policy_response_handle_functions,
+                        {AdministrativeState.UNLOCKED.value: {'success': mock_update_sub_nf}}):
+            self.policy_response_handler._handle_response(self.mock_sub.subscriptionName,
+                                                          AdministrativeState.UNLOCKED.value,
+                                                          self.nf.nf_name, 'success')
+            mock_update_sub_nf.assert_called_with(subscription_name=self.mock_sub.subscriptionName,
+                                                  status=SubNfState.CREATED.value,
+                                                  nf_name=self.nf.nf_name)
+
+    @patch('mod.subscription.Subscription.update_sub_nf_status')
+    def test_handle_response_unlocked_failed(self, mock_update_sub_nf):
+        with patch.dict(policy_response_handle_functions,
+                        {AdministrativeState.UNLOCKED.value: {'failed': mock_update_sub_nf}}):
+            self.policy_response_handler._handle_response(self.mock_sub.subscriptionName,
+                                                          AdministrativeState.UNLOCKED.value,
+                                                          self.nf.nf_name, 'failed')
+            mock_update_sub_nf.assert_called_with(subscription_name=self.mock_sub.subscriptionName,
+                                                  status=SubNfState.CREATE_FAILED.value,
+                                                  nf_name=self.nf.nf_name)
+
+    def test_handle_response_exception(self):
+        self.assertRaises(Exception, self.policy_response_handler._handle_response, 'sub1',
+                          'wrong_state', 'nf1', 'wrong_message')
+
+    @patch('mod.policy_response_handler.PolicyResponseHandler._handle_response')
+    @patch('mod.subscription.Subscription.get')
+    def test_poll_policy_topic_calls_methods_correct_sub(self, mock_get_sub, mock_handle_response):
+        response_data = ['{"name": "ResponseEvent","status": { "subscriptionName": '
+                         '"ExtraPM-All-gNB-R2B", "nfName": "pnf300", "message": "success" } }']
+        self.mock_policy_mr_sub.get_from_topic.return_value = response_data
+        mock_get_sub.return_value = SubscriptionModel(subscription_name='ExtraPM-All-gNB-R2B',
+                                                      status=AdministrativeState.UNLOCKED.value)
+        self.policy_response_handler.poll_policy_topic()
+
+        self.mock_policy_mr_sub.get_from_topic.assert_called()
+
+        mock_handle_response.assert_called_with(self.mock_sub.subscriptionName,
+                                                AdministrativeState.UNLOCKED.value, 'pnf300',
+                                                'success')
+
+    @patch('mod.policy_response_handler.PolicyResponseHandler._handle_response')
+    @patch('mod.subscription.Subscription.get')
+    def test_poll_policy_topic_no_method_calls_incorrect_sub(self, mock_get_sub,
+                                                             mock_handle_response):
+        response_data = ['{"name": "ResponseEvent","status": { "subscriptionName": '
+                         '"Different_Subscription", "nfName": "pnf300", "message": "success" } }']
+        self.mock_policy_mr_sub.get_from_topic.return_value = response_data
+        mock_get_sub.return_value = SubscriptionModel(subscription_name='ExtraPM-All-gNB-R2B',
+                                                      status=AdministrativeState.UNLOCKED.value)
+        self.policy_response_handler.poll_policy_topic()
+
+        self.mock_policy_mr_sub.get_from_topic.assert_called()
+
+        mock_handle_response.assert_not_called()
+
+    @patch('mod.subscription.Subscription.get')
+    def test_poll_policy_topic_exception(self, mock_get_sub):
+        self.mock_policy_mr_sub.get_from_topic.return_value = 'wrong_return'
+        mock_get_sub.return_value = SubscriptionModel(subscription_name='ExtraPM-All-gNB-R2B',
+                                                      status=AdministrativeState.UNLOCKED.value)
+        self.policy_response_handler.poll_policy_topic.retry.stop = stop_after_attempt(1)
+
+        self.assertRaises(Exception, self.policy_response_handler.poll_policy_topic)
diff --git a/components/pm-subscription-handler/tests/test_subscription.py b/components/pm-subscription-handler/tests/test_subscription.py
index bd39f28a..d152863d 100755
--- a/components/pm-subscription-handler/tests/test_subscription.py
+++ b/components/pm-subscription-handler/tests/test_subscription.py
@@ -26,9 +26,9 @@ from tenacity import stop_after_attempt
 
 import mod.aai_client as aai_client
 from mod import db, create_app
-from mod.network_function import NetworkFunction
+from mod.network_function import NetworkFunction, NetworkFunctionFilter
 from mod.pmsh_utils import AppConfig
-from mod.subscription import Subscription, NetworkFunctionFilter
+from mod.subscription import Subscription
 
 
 class SubscriptionTest(TestCase):
diff --git a/components/pm-subscription-handler/tests/test_subscription_handler.py b/components/pm-subscription-handler/tests/test_subscription_handler.py
new file mode 100644
index 00000000..0eed7c45
--- /dev/null
+++ b/components/pm-subscription-handler/tests/test_subscription_handler.py
@@ -0,0 +1,105 @@
+# ============LICENSE_START===================================================
+#  Copyright (C) 2020 Nordix Foundation.
+# ============================================================================
+# 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.
+#
+# SPDX-License-Identifier: Apache-2.0
+# ============LICENSE_END=====================================================
+import os
+import json
+from unittest import TestCase
+from unittest.mock import patch
+
+from mod.subscription_handler import SubscriptionHandler
+from mod.subscription import AdministrativeState
+from mod.network_function import NetworkFunction
+
+
+class SubscriptionHandlerTest(TestCase):
+
+    @patch('mod.create_app')
+    @patch('mod.subscription.Subscription')
+    @patch('mod.pmsh_utils._MrPub')
+    @patch('mod.pmsh_utils.PeriodicTask')
+    @patch('mod.config_handler.ConfigHandler')
+    @patch('mod.pmsh_utils.AppConfig')
+    def setUp(self, mock_app_conf, mock_config_handler, mock_aai_thread, mock_mr_pub,
+              mock_sub, mock_app):
+        with open(os.path.join(os.path.dirname(__file__), 'data/cbs_data_1.json'), 'r') as data:
+            self.cbs_data_1 = json.load(data)
+        self.mock_app = mock_app
+        self.mock_sub = mock_sub
+        self.mock_mr_pub = mock_mr_pub
+        self.mock_aai_thread = mock_aai_thread
+        self.mock_config_handler = mock_config_handler
+        self.mock_app_conf = mock_app_conf
+        self.nf_1 = NetworkFunction(nf_name='pnf_1')
+        self.nf_2 = NetworkFunction(nf_name='pnf_2')
+        self.nfs = [self.nf_1, self.nf_2]
+
+    @patch('mod.pmsh_logging.debug')
+    @patch('mod.aai_client.get_pmsh_subscription_data')
+    def test_execute_no_change_of_state(self, mock_get_aai, mock_logger):
+        mock_get_aai.return_value = self.mock_sub, self.nfs
+        self.mock_config_handler.get_config.return_value = self.cbs_data_1
+        sub_handler = SubscriptionHandler(self.mock_config_handler,
+                                          AdministrativeState.UNLOCKED.value, self.mock_mr_pub,
+                                          self.mock_aai_thread, self.mock_app, self.mock_app_conf)
+        sub_handler.execute()
+
+        mock_logger.assert_called_with('Administrative State did not change in the Config')
+
+    @patch('mod.aai_client.get_pmsh_subscription_data')
+    def test_execute_change_of_state_unlocked(self, mock_get_aai):
+        mock_get_aai.return_value = self.mock_sub, self.nfs
+        self.mock_aai_thread.return_value.start.return_value = 'start_method'
+        self.mock_config_handler.get_config.return_value = self.cbs_data_1
+        sub_handler = SubscriptionHandler(self.mock_config_handler,
+                                          AdministrativeState.LOCKED.value, self.mock_mr_pub,
+                                          self.mock_aai_thread, self.mock_app, self.mock_app_conf)
+        sub_handler.execute()
+
+        self.assertEqual(AdministrativeState.UNLOCKED.value, sub_handler.administrative_state)
+        self.mock_sub.process_subscription.assert_called_with(self.nfs, self.mock_mr_pub,
+                                                              self.mock_app_conf)
+        self.mock_aai_thread.start.assert_called()
+
+    @patch('mod.aai_client.get_pmsh_subscription_data')
+    def test_execute_change_of_state_locked(self, mock_get_aai):
+        mock_get_aai.return_value = self.mock_sub, self.nfs
+        self.mock_aai_thread.return_value.cancel.return_value = 'cancel_method'
+        self.cbs_data_1['policy']['subscription']['administrativeState'] = \
+            AdministrativeState.LOCKED.value
+        self.mock_config_handler.get_config.return_value = self.cbs_data_1
+        sub_handler = SubscriptionHandler(self.mock_config_handler,
+                                          AdministrativeState.UNLOCKED.value, self.mock_mr_pub,
+                                          self.mock_aai_thread, self.mock_app, self.mock_app_conf)
+        sub_handler.execute()
+
+        self.assertEqual(AdministrativeState.LOCKED.value, sub_handler.administrative_state)
+        self.mock_sub.process_subscription.assert_called_with(self.nfs, self.mock_mr_pub,
+                                                              self.mock_app_conf)
+        self.mock_aai_thread.cancel.assert_called()
+
+    @patch('mod.pmsh_logging.debug')
+    @patch('mod.aai_client.get_pmsh_subscription_data')
+    def test_execute_exception(self, mock_get_aai, mock_logger):
+        mock_get_aai.return_value = self.mock_sub, self.nfs
+        self.mock_config_handler.get_config.return_value = self.cbs_data_1
+        self.mock_sub.process_subscription.side_effect = Exception
+        sub_handler = SubscriptionHandler(self.mock_config_handler,
+                                          AdministrativeState.LOCKED.value, self.mock_mr_pub,
+                                          self.mock_aai_thread, self.mock_app, self.mock_app_conf)
+        sub_handler.execute()
+
+        mock_logger.assert_called_with('Error occurred during the activation/deactivation process ')
diff --git a/components/pm-subscription-handler/version.properties b/components/pm-subscription-handler/version.properties
index 0f1f46a5..c13587b4 100644
--- a/components/pm-subscription-handler/version.properties
+++ b/components/pm-subscription-handler/version.properties
@@ -1,6 +1,6 @@
 major=1
 minor=0
-patch=1
+patch=2
 base_version=${major}.${minor}.${patch}
 release_version=${base_version}
 snapshot_version=${base_version}-SNAPSHOT