
Subscribe-Publish Frame Work:
1.Command to Install Flask Webserver frame work.
  sudo pip install Flask

  Along with flask we need the following packages:
   msgpack
   fnmatch
   operator
   logging
   oslo_utils
   ConfigParser
 
2.Files: i.sub_main.py
         ii.pubrecords.py
         iii.pub_sub.conf

3.Command to start the server:
    #python sun_main.py
4.Command for subscription:
      i.app_id:Application ID,should be unique.
      ii.target:
           Presently only udp is supported.
           a.udp:<ip:portno>
           b.kafka:<kafkaip:kafkaport>
      iii.sub_info:Sunscription notifications.ex:cpu_util,cpu_*
      iv.query:
         Below information need to provide as part of query.
         a.field:fileds like user id ,porject id etc.,
         b.op:"eq","gt","lt" etc.,
         c.value:value of the fileds.
     Example:
  		 curl -i -H "Content-Type: application/json" -X SUB -d '{"app_id":"10","target":"udp://10.11.10.1:5006","sub_info":"cpu_util","query":[{"field":"user_id","op":"eq","value":"e1271a86bd4e413c87248baf2e5f01e0"},{"field":"project_id","op":"eq","value":"b1a3bf16d2014b47be9aefea88087318"},{"field":"resource_id","op":"eq","value":"658cd03f-d0f0-4f55-9f48-39e7222a8646"}]}' -L http://10.11.10.1:4455/subscribe

5.Command for unsunscription:
    For unsubcription only appid will be needed.
    curl -i -H "Content-Type: application/json" -X UNSUB -d '{"app_id":"10"}' http://10.11.10.1:4455/unsubscribe