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/**
* Copyright (C) 2017 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kDefault;
#include "mongo/platform/basic.h"
#include "boost/optional.hpp"
#include "mongo/db/service_context.h"
#include "mongo/transport/service_executor_adaptive.h"
#include "mongo/transport/service_executor_synchronous.h"
#include "mongo/transport/service_executor_task_names.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/log.h"
#include "mongo/util/scopeguard.h"
#include <asio.hpp>
namespace mongo {
namespace {
using namespace transport;
namespace {
constexpr Milliseconds kWorkerThreadRunTime{1000};
// Run time + generous scheduling time slice
const Milliseconds kShutdownTime = kWorkerThreadRunTime + Milliseconds{50};
}
struct TestOptions : public ServiceExecutorAdaptive::Options {
int reservedThreads() const final {
return 1;
}
Milliseconds workerThreadRunTime() const final {
return kWorkerThreadRunTime;
}
int runTimeJitter() const final {
return 0;
}
Milliseconds stuckThreadTimeout() const final {
return Milliseconds{100};
}
Microseconds maxQueueLatency() const final {
return duration_cast<Microseconds>(Milliseconds{5});
}
int idlePctThreshold() const final {
return 0;
}
int recursionLimit() const final {
return 0;
}
};
/* This implements the portions of the transport::Reactor based on ASIO, but leaves out
* the methods not needed by ServiceExecutors.
*
* TODO Maybe use TransportLayerASIO's Reactor?
*/
class ASIOReactor : public transport::Reactor {
public:
ASIOReactor() : _ioContext() {}
void run() noexcept final {
MONGO_UNREACHABLE;
}
void runFor(Milliseconds time) noexcept final {
asio::io_context::work work(_ioContext);
try {
_ioContext.run_for(time.toSystemDuration());
} catch (...) {
severe() << "Uncaught exception in reactor: " << exceptionToStatus();
fassertFailed(50476);
}
}
void stop() final {
_ioContext.stop();
}
void drain() override final {
_ioContext.restart();
while (_ioContext.poll()) {
LOG(1) << "Draining remaining work in reactor.";
}
_ioContext.stop();
}
std::unique_ptr<ReactorTimer> makeTimer() final {
MONGO_UNREACHABLE;
}
Date_t now() final {
MONGO_UNREACHABLE;
}
void schedule(ScheduleMode mode, Task task) final {
if (mode == kDispatch) {
_ioContext.dispatch(std::move(task));
} else {
_ioContext.post(std::move(task));
}
}
bool onReactorThread() const final {
return false;
}
operator asio::io_context&() {
return _ioContext;
}
private:
asio::io_context _ioContext;
};
class ServiceExecutorAdaptiveFixture : public unittest::Test {
protected:
void setUp() override {
auto scOwned = ServiceContext::make();
setGlobalServiceContext(std::move(scOwned));
auto configOwned = stdx::make_unique<TestOptions>();
executorConfig = configOwned.get();
executor = stdx::make_unique<ServiceExecutorAdaptive>(
getGlobalServiceContext(), std::make_shared<ASIOReactor>(), std::move(configOwned));
}
ServiceExecutorAdaptive::Options* executorConfig;
std::unique_ptr<ServiceExecutorAdaptive> executor;
std::shared_ptr<asio::io_context> asioIOCtx;
};
class ServiceExecutorSynchronousFixture : public unittest::Test {
protected:
void setUp() override {
auto scOwned = ServiceContext::make();
setGlobalServiceContext(std::move(scOwned));
executor = stdx::make_unique<ServiceExecutorSynchronous>(getGlobalServiceContext());
}
std::unique_ptr<ServiceExecutorSynchronous> executor;
};
void scheduleBasicTask(ServiceExecutor* exec, bool expectSuccess) {
stdx::condition_variable cond;
stdx::mutex mutex;
auto task = [&cond, &mutex] {
stdx::unique_lock<stdx::mutex> lk(mutex);
cond.notify_all();
};
stdx::unique_lock<stdx::mutex> lk(mutex);
auto status = exec->schedule(
std::move(task), ServiceExecutor::kEmptyFlags, ServiceExecutorTaskName::kSSMStartSession);
if (expectSuccess) {
ASSERT_OK(status);
cond.wait(lk);
} else {
ASSERT_NOT_OK(status);
}
}
TEST_F(ServiceExecutorAdaptiveFixture, BasicTaskRuns) {
ASSERT_OK(executor->start());
auto guard = MakeGuard([this] { ASSERT_OK(executor->shutdown(kShutdownTime)); });
scheduleBasicTask(executor.get(), true);
}
TEST_F(ServiceExecutorAdaptiveFixture, ScheduleFailsBeforeStartup) {
scheduleBasicTask(executor.get(), false);
}
TEST_F(ServiceExecutorSynchronousFixture, BasicTaskRuns) {
ASSERT_OK(executor->start());
auto guard = MakeGuard([this] { ASSERT_OK(executor->shutdown(kShutdownTime)); });
scheduleBasicTask(executor.get(), true);
}
TEST_F(ServiceExecutorSynchronousFixture, ScheduleFailsBeforeStartup) {
scheduleBasicTask(executor.get(), false);
}
} // namespace
} // namespace mongo
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