Creating a reusable Restconf client

The code in RestconfConfigDeploy.py that was responsible for making the
Restconf connections was extracted to another script, making it reusa-
ble by other blueprints

Change-Id: Ib7d8870f29c76b120ccd3e3e5ba7e13765414269
Issue-ID: CCSDK-926
Signed-off-by: ottero <rodrigo.ottero@est.tech>

3 files changed, 96 insertions, 77 deletions

diff --git a/components/model-catalog/blueprint-model/test-blueprint/capability_restconf/Scripts/python/RestconfConfigDeploy.py b/components/model-catalog/blueprint-model/test-blueprint/capability_restconf/Scripts/python/RestconfConfigDeploy.py
index 01e2ec477..78a38a225 100644
--- a/components/model-catalog/blueprint-model/test-blueprint/capability_restconf/Scripts/python/RestconfConfigDeploy.py
+++ b/components/model-catalog/blueprint-model/test-blueprint/capability_restconf/Scripts/python/RestconfConfigDeploy.py
@@ -14,30 +14,40 @@
 # limitations under the License.
 # ============LICENSE_END=========================================================
 
-from time import sleep
-
 from org.onap.ccsdk.cds.blueprintsprocessor.functions.restconf.executor import \
     RestconfComponentFunction
 from java.lang import Exception as JavaException
 
+from restconf_client import RestconfClient
+
 
 class RestconfConfigDeploy(RestconfComponentFunction):
 
     log = globals()["log"]
-    odl_status_check_limit = 10
-    odl_status_check_pause = 1
-    odl_status_check_url = "restconf/operational/network-topology:network-topology/topology/topology-netconf/node/"
-    base_odl_url = "restconf/config/network-topology:network-topology/topology/topology-netconf/node/"
-    server_identifier = "sdncodl"
     configlet_template_name = "config-assign"
-    configlet_odl_resource = "/yang-ext:mount/mynetconf:netconflist"
+    configlet_resource_path = "/yang-ext:mount/mynetconf:netconflist"
+    restconf_server_identifier = "sdncodl"
 
     def process(self, execution_request):
 
         self.log.info("Started execution of process method")
         try:
+            restconf_client = RestconfClient(self.log, self)
             pnf_id, resolution_key = self.retrieve_parameters(execution_request)
-            self.interact_with_odl(pnf_id, resolution_key)
+            web_client_service = self.restClientService(self.restconf_server_identifier)
+
+            try:
+                mount_payload = self.resolveAndGenerateMessage("config-deploy-mapping", "config-deploy-template")
+                restconf_client.mount_device(web_client_service, pnf_id, mount_payload)
+
+                configlet = self.resolveFromDatabase(resolution_key, self.configlet_template_name)
+                restconf_client.configure_device(web_client_service, pnf_id, self.configlet_resource_path, configlet)
+            except Exception, err:
+                self.log.error("an error occurred while configuring device {}", err)
+                raise err
+            finally:
+                restconf_client.unmount_device(web_client_service, pnf_id)
+
         except JavaException, err:
             self.log.error("Java Exception in the script", err)
             raise err
@@ -54,74 +64,9 @@ class RestconfConfigDeploy(RestconfComponentFunction):
         self.log.info("pnf-id: {}", pnf_id)
         return pnf_id, resolution_key
 
-    def interact_with_odl(self, pnf_id, resolution_key):
-        try:
-            self.mount(pnf_id)
-            self.log_current_configlet(pnf_id)
-            self.apply_configuration(pnf_id, resolution_key, self.configlet_template_name)
-        except Exception, err:
-            self.log.error("an error occurred while configuring device {}", err)
-            raise err
-        finally:
-            self.log.info("unmounting device {}", pnf_id)
-            self.unmount(pnf_id)
-
-    def mount(self, pnf_id):
-        self.log.info("mounting device {}", pnf_id)
-        mount_payload = self.resolveAndGenerateMessage("config-deploy-mapping", "config-deploy-template")
-        self.log.info("mount payload: \n {}", mount_payload)
-        headers = {"Content-Type": "application/xml"}  # defining custom header
-        url = self.base_odl_url + str(pnf_id)
-        self.log.info("sending mount request, url: {}", url)
-        web_client_service = self.restClientService(self.server_identifier)
-        web_client_service.exchangeResource("PUT", url, mount_payload, headers)
-        self.wait_for_odl_to_mount(pnf_id)
-
-    def wait_for_odl_to_mount(self, pnf_id):
-        counter = 0
-        url = self.odl_status_check_url + pnf_id
-        self.log.info("url for ODL status check: {}", url)
-        web_client_service = self.restClientService(self.server_identifier)
-        expected_result = '"netconf-node-topology:connection-status":"connected"'
-        while counter < self.odl_status_check_limit:
-            result = web_client_service.exchangeResource("GET", url, "")
-            self.log.info("ODL status check result: {}", result)
-            if expected_result in result:
-                self.log.info("PNF was mounted successfully on ODL")
-                return None
-            sleep(1)
-            counter += 1
-        raise JavaException("PNF was not mounted on ODL, aborting configuration procedure")
-
-    def log_current_configlet(self, pnf_id):
-        self.log.info("retrieving configuration for device {}", pnf_id)
-        url = self.base_odl_url + pnf_id + self.configlet_odl_resource
-        self.log.info("sending GET request,  url: {}", url)
-        web_client_service = self.restClientService(self.server_identifier)
-        result = web_client_service.exchangeResource("GET", url, "")
-        self.log.info("Current configuration: {}", result)
-
-    def apply_configuration(self, pnf_id, resolution_key, template_name):
-        self.log.info("configuring device {}", pnf_id)
-        self.log.info("Retrieving configlet from database (resolution-key: {}, template_name: {}",
-                      resolution_key, template_name)
-        configlet = self.resolveFromDatabase(resolution_key, template_name)
-        self.log.info("Configlet: {}", configlet)
-        headers = { "Content-Type": "application/yang.patch+json" }  # defining custom header
-        url = self.base_odl_url + pnf_id + self.configlet_odl_resource
-        self.log.info("sending patch request,  url: {}", url)
-        web_client_service = self.restClientService(self.server_identifier)
-        result = web_client_service.exchangeResource("PATCH", url, configlet, headers)
-        self.log.info("Configuration application result: {}", result)
-
-    def unmount(self, pnf_id):
-        url = self.base_odl_url + str(pnf_id)
-        self.log.info("sending unmount request, url: {}", url)
-        web_client_service = self.restClientService(self.server_identifier)
-        web_client_service.exchangeResource("DELETE", url, "")
-
     def recover(self, runtime_exception, execution_request):
         self.log.info("Recover function called!")
-        self.log.error(runtime_exception.getMessage())
+        self.log.info("Execution request", execution_request)
+        self.log.error("Exception", runtime_exception)
         print self.bluePrintRuntimeService.getBluePrintError().addError(runtime_exception.getMessage())
-        return None
\ No newline at end of file
+        return None
diff --git a/components/scripts/python/ccsdk_restconf/__init__.py b/components/scripts/python/ccsdk_restconf/__init__.py
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/components/scripts/python/ccsdk_restconf/__init__.py
diff --git a/components/scripts/python/ccsdk_restconf/restconf_client.py b/components/scripts/python/ccsdk_restconf/restconf_client.py
new file mode 100644
index 000000000..43e885a5b
--- /dev/null
+++ b/components/scripts/python/ccsdk_restconf/restconf_client.py
@@ -0,0 +1,74 @@
+#
+# ============LICENSE_START=======================================================
+#  Copyright (C) 2019 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=========================================================
+#
+from time import sleep
+
+
+class RestconfClient:
+
+    __odl_status_check_limit = 10
+    __odl_status_check_pause = 1
+    __odl_status_check_url = "restconf/operational/network-topology:network-topology/topology/topology-netconf/node/"
+    __base_odl_url = "restconf/config/network-topology:network-topology/topology/topology-netconf/node/"
+
+    def __init__(self, log, restconf_component_function):
+        self.__log = log
+        self.__component_function = restconf_component_function
+
+    def mount_device(self, web_client_service, pnf_id, mount_payload):
+        self.__log.debug("mounting device {}", pnf_id)
+        headers = {"Content-Type": "application/xml"}
+        url = self.__base_odl_url + pnf_id
+        self.__log.debug("sending mount request, url: {}", url)
+        web_client_service.exchangeResource("PUT", url, mount_payload, headers)
+        self.__wait_for_odl_to_mount(web_client_service, pnf_id)
+
+    def __wait_for_odl_to_mount(self, web_client_service, pnf_id):
+        counter = 0
+        url = self.__odl_status_check_url + pnf_id
+        self.__log.info("url for ODL status check: {}", url)
+        expected_result = '"netconf-node-topology:connection-status":"connected"'
+        while counter < self.__odl_status_check_limit:
+            result = web_client_service.exchangeResource("GET", url, "")
+            if expected_result in result:
+                self.__log.info("PNF was mounted successfully on ODL")
+                return None
+            sleep(self.__odl_status_check_pause)
+            counter += 1
+        raise Exception("PNF was not mounted on ODL, aborting configuration procedure")
+
+    def configure_device(self, web_client_service, pnf_id, configlet_resource_path, configlet_to_apply):
+        self.log_current_configlet(web_client_service, pnf_id, configlet_resource_path)
+        self.__log.info("configuring device: {}, Configlet: {}", pnf_id, configlet_to_apply)
+        headers = {"Content-Type": "application/yang.patch+json"}
+        url = self.__base_odl_url + pnf_id + configlet_resource_path
+        self.__log.debug("sending patch request,  url: {}", url)
+        result = web_client_service.exchangeResource("PATCH", url, configlet_to_apply, headers)
+        self.__log.info("Configuration application result: {}", result)
+
+    def log_current_configlet(self, web_client_service, pnf_id, configlet_resource_path):
+        url = self.__base_odl_url + pnf_id + configlet_resource_path
+        self.__log.debug("sending GET request,  url: {}", url)
+        result = web_client_service.exchangeResource("GET", url, "")
+        self.__log.info("Current configuration: {}", result)
+
+    def unmount_device(self, web_client_service, pnf_id):
+        url = self.__base_odl_url + str(pnf_id)
+        self.__log.debug("sending unmount request, url: {}", url)
+        web_client_service.exchangeResource("DELETE", url, "")