Add endpoint and cron job to aggregate all dimensions and values

appengine/swarming/swarming_rpcs.py

 # Copyright 2015 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 """This module defines ProtoRPC types for the Swarming Server handlers."""
 
 from protorpc import message_types
 from protorpc import messages
 
 
@@ skipping 365 matching lines @@
 
 class BotsCount(messages.Message):
   """Returns the count, as requested."""
   now = message_types.DateTimeField(1)
   count = messages.IntegerField(2)
   quarantined = messages.IntegerField(3)
   dead = messages.IntegerField(4)
   busy = messages.IntegerField(5)
 
 
+class BotsDimensions(messages.Message):
+  """Returns all the dimensions and dimension possibilities in the fleet."""
+  bots_dimensions = messages.MessageField(StringListPair, 1, repeated=True)
+  # Time at which this summary was calculated.
+  ts = message_types.DateTimeField(2)
+
+
 class BotEvent(messages.Message):
   # Timestamp of this event.
   ts = message_types.DateTimeField(1)
   # Type of event.
   event_type = messages.StringField(2)
   # Message included in the event.
   message = messages.StringField(3)
   # Bot dimensions at that moment.
   dimensions = messages.MessageField(StringListPair, 4, repeated=True)
   # Bot state at that moment, encoded as json.
@@ skipping 23 matching lines @@
 
 
 class DeletedResponse(messages.Message):
   """Indicates whether a bot was deleted."""
   deleted = messages.BooleanField(1)
 
 
 class TerminateResponse(messages.Message):
   """Returns the pseudo taskid to wait for the bot to shut down."""
   task_id = messages.StringField(1)