1// Copyright 2017 The Chromium Authors 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5syntax = "proto2"; 6 7option optimize_for = LITE_RUNTIME; 8option java_package = "org.chromium.components.metrics"; 9 10package ukm; 11 12// Next tag: 6 13message Entry { 14 // Unique identifier for an Event. This is used to provide hierarchical 15 // structure for Events. 16 optional int32 DEPRECATED_id = 1 [deprecated = true]; 17 18 // Parent id, which is associated with an id for another Event. This is set 19 // only if the Event has another Event which can be considered a parent. 20 // This is to provide hierarchies for Events. 21 optional int32 DEPRECATED_parent_id = 2 [deprecated = true]; 22 23 // The id of the Source this Event is associated with. 24 optional int64 source_id = 3; 25 26 // Type of the Event. This is a hash of the name (as a string). 27 optional fixed64 event_hash = 4; 28 29 // For each Event, we have a list of possible metrics included. It's possible 30 // for a single metric name to be repeated. There is also no guarantee that 31 // all metrics that are available for a given event will be provided for a 32 // single Entry. 33 message Metric { 34 optional fixed64 metric_hash = 1; 35 optional int64 value = 2; 36 } 37 repeated Metric metrics = 5; 38} 39