Commits on May 1, 2024

1. Add support for coming up with a persist policy …

       "opflex": {
          "startup": {
               "policy-file": "/home/mchalla/thomas/pol.json",
               "policy-duration": 0,
               "resolve-aft-conn": false
          },
   
   - opflex.startup.policy-file contains pol.json to use at startup
   - opflex.startup.policy-duration tells how long in
     seconds to keep resolving policy from the above pol.json
   - opflex.startup.resolve-aft-conn wait till conn before using startup db
     use in combination with duration > 0
   - opflex.startup.resolve-once placeholder for resolving only first time from startup db
   - opflex.startup.full-proxy placeholder use startup db for life of opflex
     meaning startup db will be updated at run time to keep both in sync
   
   If policy-file exists we create a startupdb thats used for
   intermediate resolves until the leaf connection succeeds based
   on the above startup-policy-duration
   
   On every local resolve we lookup startupdb and recursively
   resolve children and put those in the running modb and
   generating notifications as needed.
   
   On a connect to leaf depending on the above timer and the fact
   that these threads can run in parallel we will continue to resolve
   from startupdb while also sending all the resolves to the leaf.
   
   Once the curtime is beyond the set duration functionality reverts
   to current behavior of only resolving from the leaf.
   
   On stop we write current running policy into pol.json from the config
   if present.
   
   If the file is missing functionality is same as before.
   
   Change isOrphan to skip check when using startup db since the timing
   of the sync resolve is causing some valid mos to be deleted as orphans
   (still investigating an async approach similar to how it would work
    with a mock server or leaf)
   
   Signed-off-by: Madhu Challa <challa@gmail.com>

   

   mchalla committed May 1, 2024
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