4.6.0 policy-handler - active-passive

DCAEGEN2-931:
- exposed POST /reconfigure endpoint on the web-server
  that initiates the reconfigure process right away

DCAEGEN2-932:
- mode_of_operation: active or passive
  = active is as before this change
  = in passive mode the policy-handler
    * closes the web-socket to PDP
    * skips the periodic catch_ups
    * still periodically checks for reconfigure
    * still allows usig the web-server to retrieve policies from PDP
- default is active

- when mode_of_operation changes from passive to active,
  the policy-handler invokes the catch_up right away

- config-kv contains the optional override field mode_of_operation
  = changing the mode_of_operation in config-kv and invoking
    POST /reconfigure will bring the new value and change the
    mode of operation of the policy-handler if no service_activator
    section is provided in consul-kv record

- if config-kv contains the service_activator section,
  = the policy-handler registers with service_activator - untested
  = and receives the mode_of_operation - untested
  = service_activator can POST-notify the policy-handler to
    initiate the /reconfigure

- reduced the default web-socket ping interval from 180 to 30
  seconds because PDP changed its default timeout on the web-socket
  from 400 seconds to 50 seconds

Change-Id: If7dd21c008d9906aca97939be65dfa9c2f007535
Signed-off-by: Alex Shatov <alexs@att.com>
Issue-ID: DCAEGEN2-931
Issue-ID: DCAEGEN2-932

1 files changed, 19 insertions, 2 deletions

diff --git a/policyhandler/web_server.py b/policyhandler/web_server.py
index 73e7fbc..dc76353 100644
--- a/policyhandler/web_server.py
+++ b/policyhandler/web_server.py
@@ -1,5 +1,5 @@
 # ================================================================================
-# Copyright (c) 2017-2018 AT&T Intellectual Property. All rights reserved.
+# Copyright (c) 2017-2019 AT&T Intellectual Property. All rights reserved.
 # ================================================================================
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -208,7 +208,24 @@ class _PolicyWeb(object):
         PolicyWeb.logger.info("%s", req_info)
         PolicyReceiver.catch_up(audit)
 
-        res = {"catch-up requested": started}
+        res = {"catch-up requested": started, "request_id": audit.request_id}
+        PolicyWeb.logger.info("requested %s: %s", req_info, json.dumps(res))
+        audit.info_requested(started)
+        return res
+
+    @cherrypy.expose
+    @cherrypy.tools.json_out()
+    def reconfigure(self):
+        """schedule reconfigure"""
+        started = str(datetime.utcnow())
+        req_info = _PolicyWeb._get_request_info(cherrypy.request)
+        audit = Audit(job_name="reconfigure", req_message=req_info,
+                      headers=cherrypy.request.headers)
+
+        PolicyWeb.logger.info("%s", req_info)
+        PolicyReceiver.reconfigure(audit)
+
+        res = {"reconfigure requested": started, "request_id": audit.request_id}
         PolicyWeb.logger.info("requested %s: %s", req_info, json.dumps(res))
         audit.info_requested(started)
         return res