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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/scalable_iph/logger.h"
#include "ash/constants/ash_features.h"
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/to_string.h"
#include "base/time/time.h"
namespace scalable_iph {
namespace {
// A practically impossible to reach limit of number of log messages. This is
// for receiving 100 log messages for a minute for 200 hours. If an average size
// of a single log message is 200bytes, this will be ~240MB.
constexpr int kLogSizeLimit = 100 * 200 * 60;
} // namespace
// static
bool Logger::IsEnabled() {
return ash::features::IsScalableIphDebugEnabled();
}
Logger::Logger() = default;
Logger::~Logger() = default;
void Logger::Log(const base::Location& location, std::string_view log_string) {
if (!IsEnabled()) {
return;
}
CHECK(logs_.size() < kLogSizeLimit)
<< "Log size reached to its internal limit.";
const std::string& log = base::JoinString(
{ToString(base::Time::Now()), ToString(location), log_string}, ": ");
DLOG(WARNING) << log;
logs_.push_back(std::move(log));
}
std::string Logger::GenerateLog() {
CHECK(IsEnabled());
return base::JoinString(logs_, "\n");
}
bool Logger::IsLogEmptyForTesting() {
return logs_.empty();
}
LogMessage::LogMessage(Logger* logger, base::Location location)
: logger_(logger), location_(location) {
CHECK(logger_);
}
LogMessage::~LogMessage() {
logger_->Log(location_, stream_.str());
}
} // namespace scalable_iph
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