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/**
* Copyright (c) 2020, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "Experiments.h"
#include <android-base/format.h>
#include <netdutils/DumpWriter.h>
#include <string>
#include "util.h"
namespace android::net {
using netdutils::DumpWriter;
using netdutils::ScopedIndent;
Experiments* Experiments::getInstance() {
// Instantiated on first use.
static Experiments instance{getExperimentFlagInt};
return &instance;
}
Experiments::Experiments(GetExperimentFlagIntFunction getExperimentFlagIntFunction)
: mGetExperimentFlagIntFunction(std::move(getExperimentFlagIntFunction)) {
updateInternal();
}
void Experiments::update() {
updateInternal();
}
void Experiments::dump(DumpWriter& dw) const {
std::lock_guard guard(mMutex);
dw.println("Experiments list: ");
for (const auto& [key, value] : mFlagsMapInt) {
ScopedIndent indentStats(dw);
if (value == Experiments::kFlagIntDefault) {
dw.println(fmt::format("{}: UNSET", key));
} else {
dw.println(fmt::format("{}: {}", key, value));
}
}
}
void Experiments::updateInternal() {
std::lock_guard guard(mMutex);
for (const auto& key : kExperimentFlagKeyList) {
mFlagsMapInt[key] = mGetExperimentFlagIntFunction(key, Experiments::kFlagIntDefault);
}
}
int Experiments::getFlag(std::string_view key, int defaultValue) const {
std::lock_guard guard(mMutex);
auto it = mFlagsMapInt.find(key);
if (it != mFlagsMapInt.end() && it->second != Experiments::kFlagIntDefault) {
return it->second;
}
return defaultValue;
}
} // namespace android::net
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