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arangodb/arangod/RestServer/DatabaseServerFeature.cpp

98 lines
2.9 KiB
C++

////////////////////////////////////////////////////////////////////////////////
/// DISCLAIMER
///
/// Copyright 2016 ArangoDB GmbH, Cologne, Germany
///
/// 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.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
////////////////////////////////////////////////////////////////////////////////
#include "DatabaseServerFeature.h"
#include "Basics/ThreadPool.h"
#include "ProgramOptions/ProgramOptions.h"
#include "ProgramOptions/Section.h"
#include "VocBase/server.h"
#include "Wal/LogfileManager.h"
using namespace arangodb;
using namespace arangodb::application_features;
using namespace arangodb::basics;
using namespace arangodb::options;
TRI_server_t* DatabaseServerFeature::SERVER;
basics::ThreadPool* DatabaseServerFeature::INDEX_POOL;
DatabaseServerFeature::DatabaseServerFeature(ApplicationServer* server)
: ApplicationFeature(server, "DatabaseServer"),
_indexThreads(2),
_server(nullptr) {
setOptional(false);
requiresElevatedPrivileges(false);
startsAfter("FileDescriptors");
startsAfter("Language");
startsAfter("Logger");
startsAfter("Random");
startsAfter("Temp");
startsAfter("WorkMonitor");
startsAfter("Statistics");
}
void DatabaseServerFeature::collectOptions(std::shared_ptr<ProgramOptions> options) {
options->addSection("database", "Configure the database");
options->addHiddenOption(
"--database.index-threads",
"threads to start for parallel background index creation",
new UInt64Parameter(&_indexThreads));
}
void DatabaseServerFeature::validateOptions(std::shared_ptr<ProgramOptions> options) {
// some arbitrary limit
if (_indexThreads > 128) {
_indexThreads = 128;
}
}
void DatabaseServerFeature::prepare() {
// create the server
TRI_InitServerGlobals();
_server.reset(new TRI_server_t());
SERVER = _server.get();
}
void DatabaseServerFeature::start() {
// create the index thread pool
if (_indexThreads > 0) {
_indexPool.reset(new ThreadPool(static_cast<size_t>(_indexThreads), "IndexBuilder"));
INDEX_POOL = _indexPool.get();
}
}
void DatabaseServerFeature::unprepare() {
// turn off index threads
INDEX_POOL = nullptr;
_indexPool.reset();
// delete the server
TRI_StopServer(_server.get());
SERVER = nullptr;
_server.reset(nullptr);
// done
LOG(INFO) << "ArangoDB has been shut down";
}