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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
module metrics.dwa.mojom;
struct DwaEntry {
// A hash of the event name (such as "ReportingAPIUsage").
// Uses the same hash function as UMA.
// http://cs.chromium.org/chromium/src/base/metrics/metrics_hashes.cc?q=HashMetricName
uint64 event_hash;
// A hash of the content (e.g. hash("example.com")).
// Uses the same hash function as UMA.
// http://cs.chromium.org/chromium/src/base/metrics/metrics_hashes.cc?q=HashMetricName
uint64 content_hash;
// Map of names of field trials of interest. Their values are always true.
// Since mojom does not support set directly, we use a map to prevent
// duplicate keys. We should revisit this in the future to change the
// type to type-map it to a set.
map<string,bool> studies_of_interest;
// Map of metrics and their values that are relevant for this DWA event.
map<uint64,int64> metrics;
};
// Interface used for sending information from browser process to clients.
// Lives in the browser process.
interface DwaRecorderClientInterface {
};
// Interface used for sending DWA events from clients to the browser process.
// Lives in the renderer process.
interface DwaRecorderInterface {
// Clients call this method when the entry is ready to be logged by the
// recorder.
AddEntry(DwaEntry entry);
};
// This interface is used for building bidirectional communication between
// browser & client.
interface DwaRecorderFactory {
// The implementation of DwaRecorderClientInterface calls this method when
// it's first initialized.
CreateDwaRecorder(pending_receiver<DwaRecorderInterface> receiver,
pending_remote<DwaRecorderClientInterface> client_remote);
};
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