buildbucket: add retry API.

appengine/cr-buildbucket/model.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import datetime
 import random
 
 from components import auth
 from components import utils
 from google.appengine.ext import ndb
@@ skipping 101 matching lines @@
   status_changed_time = ndb.DateTimeProperty(auto_now_add=True)
   update_time = ndb.DateTimeProperty(auto_now=True)
 
   # Creation time attributes.
   create_time = ndb.DateTimeProperty(auto_now_add=True)
   created_by = auth.IdentityProperty()
   bucket = ndb.StringProperty(required=True)
   tags = ndb.StringProperty(repeated=True)
   parameters = ndb.JsonProperty()
   pubsub_callback = ndb.StructuredProperty(PubSubCallback, indexed=False)
+  retry_of = ndb.IntegerProperty()
 
   # Lease-time attributes.
   lease_expiration_date = ndb.DateTimeProperty()
   lease_key = ndb.IntegerProperty(indexed=False)
   is_leased = ndb.ComputedProperty(lambda self: self.lease_key is not None)
   leasee = auth.IdentityProperty()
   never_leased = ndb.BooleanProperty()
 
   # Start time attributes.
   url = ndb.StringProperty(indexed=False)
@@ skipping 46 matching lines @@
   """
   # Build ID bits: "0N{43}R{16}V{4}"
   # where N is now bits, R is random bits and V is version bits.
   utcnow = utils.utcnow()
   assert utcnow >= BEGINING_OF_THE_WORLD
   delta = utcnow - BEGINING_OF_THE_WORLD
   now = int(round(delta.total_seconds() * 1000.))
   inverted_now = ~now & ((1 << 43) - 1)
   suffix = random.getrandbits(16)
   return int((inverted_now << 20) | (suffix << 4))