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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef EXTENSIONS_BROWSER_CONTENT_VERIFIER_SCOPED_UMA_RECORDER_H_
#define EXTENSIONS_BROWSER_CONTENT_VERIFIER_SCOPED_UMA_RECORDER_H_
#include "base/metrics/histogram_macros.h"
namespace extensions {
// Helper to record UMA for ComputedHashes::Reader::InitFromFile and results of
// initializing verified_contents.json file.
// Records failure UMA if RecordSuccess() isn't explicitly called.
template <const char* RESULT_HISTOGRAM_NAME, const char* TIME_HISTOGRAM_NAME>
class ScopedUMARecorder {
public:
ScopedUMARecorder() = default;
ScopedUMARecorder(const ScopedUMARecorder&) = delete;
ScopedUMARecorder& operator=(const ScopedUMARecorder&) = delete;
~ScopedUMARecorder() {
if (recorded_) {
return;
}
RecordImpl(false);
}
void RecordSuccess() {
recorded_ = true;
RecordImpl(true);
}
private:
void RecordImpl(bool succeeded) {
UMA_HISTOGRAM_BOOLEAN(RESULT_HISTOGRAM_NAME, succeeded);
if (succeeded) {
UMA_HISTOGRAM_TIMES(TIME_HISTOGRAM_NAME, timer_.Elapsed());
}
}
bool recorded_ = false;
base::ElapsedTimer timer_;
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_CONTENT_VERIFIER_SCOPED_UMA_RECORDER_H_
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