102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
|
/*
|
||
|
|
* LocalConfiguration.actor.cpp
|
||
|
|
*
|
||
|
|
* This source file is part of the FoundationDB open source project
|
||
|
|
*
|
||
|
|
* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
|
||
|
|
*
|
||
|
|
* 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 "fdbserver/ConfigFollowerInterface.h"
|
||
|
|
#include "fdbserver/LocalConfiguration.h"
|
||
|
|
#include "flow/actorcompiler.h" // This must be the last #include.
|
||
|
|
|
||
|
|
static const KeyRef pathKey = LiteralStringRef("path");
|
||
|
|
static const KeyRef updatesKey = LiteralStringRef("updates");
|
||
|
|
|
||
|
|
class LocalConfigurationImpl {
|
||
|
|
IKeyValueStore* kvStore; // FIXME: fix leaks?
|
||
|
|
ConfigPath configPath;
|
||
|
|
Optional<KnobUpdates> updates;
|
||
|
|
Future<Void> init;
|
||
|
|
bool read{ false };
|
||
|
|
ConfigFollowerInterface consumer;
|
||
|
|
|
||
|
|
ACTOR static Future<Void> initialize(LocalConfigurationImpl* self) {
|
||
|
|
wait(self->kvStore->init());
|
||
|
|
Optional<Value> path = wait(self->kvStore->readValue(pathKey));
|
||
|
|
if (!path.present()) {
|
||
|
|
return Void();
|
||
|
|
}
|
||
|
|
ConfigPath durablePath;
|
||
|
|
BinaryReader br(path.get(), IncludeVersion());
|
||
|
|
br >> durablePath;
|
||
|
|
if (durablePath == self->configPath) {
|
||
|
|
Optional<Value> updatesValue = wait(self->kvStore->readValue(updatesKey));
|
||
|
|
ASSERT(updatesValue.present()); // FIXME: Possible race condition?
|
||
|
|
BinaryReader br(updatesValue.get(), IncludeVersion());
|
||
|
|
KnobUpdates updates;
|
||
|
|
br >> updates;
|
||
|
|
self->updates = updates;
|
||
|
|
}
|
||
|
|
return Void();
|
||
|
|
}
|
||
|
|
|
||
|
|
ACTOR static Future<Optional<KnobUpdates>> getUpdates(LocalConfigurationImpl* self) {
|
||
|
|
ASSERT(false);
|
||
|
|
wait(self->init);
|
||
|
|
self->read = true;
|
||
|
|
return self->updates;
|
||
|
|
}
|
||
|
|
|
||
|
|
ACTOR static Future<Void> saveUpdates(LocalConfigurationImpl* self, KnobUpdates updates) {
|
||
|
|
{
|
||
|
|
BinaryWriter bw(IncludeVersion());
|
||
|
|
bw << self->configPath;
|
||
|
|
self->kvStore->set(KeyValueRef(pathKey, bw.toValue()));
|
||
|
|
}
|
||
|
|
{
|
||
|
|
BinaryWriter bw(IncludeVersion());
|
||
|
|
bw << updates;
|
||
|
|
self->kvStore->set(KeyValueRef(updatesKey, bw.toValue()));
|
||
|
|
}
|
||
|
|
wait(self->kvStore->commit());
|
||
|
|
return Void();
|
||
|
|
}
|
||
|
|
|
||
|
|
public:
|
||
|
|
LocalConfigurationImpl(ConfigPath const& configPath, std::string const& dataFolder) : configPath(configPath) {
|
||
|
|
platform::createDirectory(dataFolder);
|
||
|
|
kvStore = keyValueStoreMemory(joinPath(dataFolder, "localconf-"), UID{}, 500e6);
|
||
|
|
init = (initialize(this));
|
||
|
|
}
|
||
|
|
|
||
|
|
Future<Optional<KnobUpdates>> getUpdates() { return getUpdates(this); }
|
||
|
|
|
||
|
|
Future<Void> saveUpdates(KnobUpdates const& updates) { return saveUpdates(this, updates); }
|
||
|
|
};
|
||
|
|
|
||
|
|
LocalConfiguration::LocalConfiguration(ConfigPath const& path, std::string const& dataFolder)
|
||
|
|
: impl(std::make_unique<LocalConfigurationImpl>(path, dataFolder)) {}
|
||
|
|
|
||
|
|
LocalConfiguration::~LocalConfiguration() = default;
|
||
|
|
|
||
|
|
Future<Optional<KnobUpdates>> LocalConfiguration::getUpdates() {
|
||
|
|
return impl->getUpdates();
|
||
|
|
}
|
||
|
|
|
||
|
|
Future<Void> LocalConfiguration::saveUpdates(KnobUpdates const& updates) {
|
||
|
|
return impl->saveUpdates(updates);
|
||
|
|
}
|