Add NETCONF PNF Simulator Engine

Issue-ID: INT-1124
Signed-off-by: ebo <eliezio.oliveira@est.tech>
Change-Id: Ifb50a749992cbd662d579e1cb861bd8f55b3f808

4 files changed, 187 insertions, 0 deletions

diff --git a/test/mocks/netconf-pnp-simulator/docs/examples/mynetconf/data.json b/test/mocks/netconf-pnp-simulator/docs/examples/mynetconf/data.json
new file mode 100644
index 000000000..63872eef9
--- /dev/null
+++ b/test/mocks/netconf-pnp-simulator/docs/examples/mynetconf/data.json
@@ -0,0 +1,10 @@
+{
+  "mynetconf:netconflist": {
+    "netconf": [
+      {
+        "netconf-id": 3,
+        "netconf-param": 3
+      }
+    ]
+  }
+}
diff --git a/test/mocks/netconf-pnp-simulator/docs/examples/mynetconf/docker-compose.yml b/test/mocks/netconf-pnp-simulator/docs/examples/mynetconf/docker-compose.yml
new file mode 100644
index 000000000..ee70c4fd9
--- /dev/null
+++ b/test/mocks/netconf-pnp-simulator/docs/examples/mynetconf/docker-compose.yml
@@ -0,0 +1,12 @@
+version: '3'
+
+services:
+  netopeer2:
+    image: nexus3.onap.org:10001/onap/integration/simulators/netconf-pnp-simulator:2.6.0
+    container_name: mynetconf
+    restart: always
+    ports:
+      - "830:830"
+      - "6513:6513"
+    volumes:
+      - ./:/config/modules/mynetconf
diff --git a/test/mocks/netconf-pnp-simulator/docs/examples/mynetconf/model.yang b/test/mocks/netconf-pnp-simulator/docs/examples/mynetconf/model.yang
new file mode 100644
index 000000000..6c8c36ab0
--- /dev/null
+++ b/test/mocks/netconf-pnp-simulator/docs/examples/mynetconf/model.yang
@@ -0,0 +1,29 @@
+module mynetconf {
+    yang-version 1.1;
+    namespace "urn:mynetconf:test";
+
+    prefix nft;
+
+    organization
+      "mynetconf";
+    contact
+      "my netconf address";
+    description
+      "yang model for mynetconf";
+    revision "2019-03-01" {
+        description
+          "initial version";
+    }
+
+    container netconflist {
+        list netconf {
+            key netconf-id;
+            leaf netconf-id {
+                type uint16;
+            }
+            leaf netconf-param {
+                type uint32;
+            }
+        }
+    }
+}
diff --git a/test/mocks/netconf-pnp-simulator/docs/examples/mynetconf/subscriber.py b/test/mocks/netconf-pnp-simulator/docs/examples/mynetconf/subscriber.py
new file mode 100755
index 000000000..612729675
--- /dev/null
+++ b/test/mocks/netconf-pnp-simulator/docs/examples/mynetconf/subscriber.py
@@ -0,0 +1,136 @@
+#!/usr/bin/env python3
+
+__author__ = "Mislav Novakovic <mislav.novakovic@sartura.hr>"
+__copyright__ = "Copyright 2018, Deutsche Telekom AG"
+__license__ = "Apache 2.0"
+
+# 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.
+
+# This sample application demonstrates use of Python programming language bindings for sysrepo library.
+# Original c application was rewritten in Python to show similarities and differences
+# between the two.
+#
+# Most notable difference is in the very different nature of languages, c is weakly statically typed language
+# while Python is strongly dynamically typed. Python code is much easier to read and logic easier to comprehend
+# for smaller scripts. Memory safety is not an issue but lower performance can be expected.
+#
+# The original c implementation is also available in the source, so one can refer to it to evaluate trade-offs.
+
+import sysrepo as sr
+import sys
+
+
+# Helper function for printing changes given operation, old and new value.
+def print_change(op, old_val, new_val):
+    if op == sr.SR_OP_CREATED:
+        print(f"CREATED: {new_val.to_string()}")
+    elif op == sr.SR_OP_DELETED:
+        print(f"DELETED: {old_val.to_string()}")
+    elif op == sr.SR_OP_MODIFIED:
+        print(f"MODIFIED: {old_val.to_string()} to {new_val.to_string()}")
+    elif op == sr.SR_OP_MOVED:
+        print(f"MOVED: {new_val.xpath()} after {old_val.xpath()}")
+
+
+# Helper function for printing events.
+def ev_to_str(ev):
+    if ev == sr.SR_EV_VERIFY:
+        return "verify"
+    elif ev == sr.SR_EV_APPLY:
+        return "apply"
+    elif ev == sr.SR_EV_ABORT:
+        return "abort"
+    else:
+        return "unknown"
+
+
+# Function to print current configuration state.
+# It does so by loading all the items of a session and printing them out.
+def print_current_config(session, module_name):
+    select_xpath = f"/{module_name}:*//*"
+
+    values = session.get_items(select_xpath)
+
+    if values is not None:
+        print("========== BEGIN CONFIG ==========")
+        for i in range(values.val_cnt()):
+            print(values.val(i).to_string(), end='')
+        print("=========== END CONFIG ===========")
+
+
+# Function to be called for subscribed client of given session whenever configuration changes.
+def module_change_cb(sess, module_name, event, private_ctx):
+    try:
+        print("========== Notification " + ev_to_str(event) + " =============================================")
+        if event == sr.SR_EV_APPLY:
+            print_current_config(sess, module_name)
+
+        print("========== CHANGES: =============================================")
+
+        change_path = f"/{module_name}:*"
+
+        it = sess.get_changes_iter(change_path)
+
+        while True:
+            change = sess.get_change_next(it)
+            if change is None:
+                break
+            print_change(change.oper(), change.old_val(), change.new_val())
+
+        print("========== END OF CHANGES =======================================")
+    except Exception as e:
+        print(e)
+
+    return sr.SR_ERR_OK
+
+
+def main():
+    # Notable difference between c implementation is using exception mechanism for open handling unexpected events.
+    # Here it is useful because `Connection`, `Session` and `Subscribe` could throw an exception.
+    try:
+        module_name = "ietf-interfaces"
+        if len(sys.argv) > 1:
+            module_name = sys.argv[1]
+        else:
+            print("\nYou can pass the module name to be subscribed as the first argument")
+
+        print(f"Application will watch for changes in {module_name}")
+
+        # connect to sysrepo
+        conn = sr.Connection(module_name)
+
+        # start session
+        sess = sr.Session(conn)
+
+        # subscribe for changes in running config */
+        subscribe = sr.Subscribe(sess)
+
+        subscribe.module_change_subscribe(module_name, module_change_cb)
+
+        try:
+            print_current_config(sess, module_name)
+        except Exception as e:
+            print(e)
+
+        print("========== STARTUP CONFIG APPLIED AS RUNNING ==========")
+
+        sr.global_loop()
+
+        print("Application exit requested, exiting.")
+
+    except Exception as e:
+        print(e)
+
+
+if __name__ == '__main__':
+    main()