Initial distributor implementation

appengine/cmd/dm/distributor/protos/distributor.proto

+// Copyright 2015 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.
+
+syntax = "proto3";
+
+package distributor;
+
+import "jobsim/jobsim.proto";
+import "swarmingV1/swarmingV1.proto";
+
+message Alias {
+  string other_config = 1;
+}
+
+message Distributor {
+  reserved 2; // future: generic pRPC based distributor
+  reserved 3; // future: generic gRPC based distributor
+
+  // TODO(iannucci): Maybe something like Any or extensions would be a better
+  // fit here? The ultimate goal is that users will be able to use the proto
+  // text format for luci-config. I suspect that Any or extensions would lose
+  // the ability to validate such text-formatted protobufs, but maybe that's
+  // not the case.
+  oneof distributor_type {
+    Alias alias = 1;
+
+    swarmingV1.Config swarming_v1 = 4;
+
+    // this is for testing purposes and will only be used in production to put
+    // test load on DM. It's tagged at 2048 to keep it well out of the way.
+    jobsim.Config jobsim = 2048;
+  }
+}
+
+message Config {
+  map<string, Distributor> distributor_configs = 1;
+}