LogDog: Implement RegisterPrefix RPC.

common/proto/logdog/svcconfig/project.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 svcconfig;
 
 import "google/protobuf/duration.proto";
 
@@ skipping 15 matching lines @@
   repeated string writer_auth_groups = 3;
 
   // The maximum lifetime of a log stream.
   //
   // If a stream has not terminated after this period of time, it will be
   // forcefully archived, and additional stream data will be discarded.
   //
   // This is upper-bounded by the global "archive_delay_max" parameter.
   google.protobuf.Duration max_stream_age = 4;
 
+  // The maximum amount of time after a prefix has been registered when log
+  // streams may also be registered under that prefix.
+  //
+  // See Config's "prefix_expiration" for more information.
+  google.protobuf.Duration prefix_expiration = 5;
+
   // The base Google Storage archival path, of the form: "gs://bucket/..."
   //
   // The bucket name must be included (e.g., "gs://foo"). The remainder of the
   // base path is optional based on desired archive location.
   //
   // Note that the Archivist microservice must have WRITE access to this
   // bucket, and the Coordinator must have READ access.
   //
   // If this is not set, the logs will be archived in a project-named
   // subdirectory in the global "archive_gs_base" location.
@@ skipping 11 matching lines @@
   int32 archive_index_stream_range = 12;
   // If not zero, the maximum number of prefix indices between index entries.
   //
   // If this is not set, the global "index_prefix_range" value will be used.
   int32 archive_index_prefix_range = 21;
   // If not zero, the maximum number of log data bytes between index entries.
   //
   // If this is not set, the global "index_byte_range" value will be used.
   int32 archive_index_byte_range = 22;
 }