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/**
* Copyright (C) 2018 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.
*/
#include "mongo/platform/basic.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/periodic_runner_impl.h"
#include "mongo/db/service_context_noop.h"
#include "mongo/stdx/condition_variable.h"
#include "mongo/stdx/mutex.h"
#include "mongo/util/clock_source_mock.h"
namespace mongo {
class Client;
namespace {
class PeriodicRunnerImplTestNoSetup : public unittest::Test {
public:
void setUp() override {
_clockSource = std::make_unique<ClockSourceMock>();
_svc = stdx::make_unique<ServiceContextNoop>();
_runner = stdx::make_unique<PeriodicRunnerImpl>(_svc.get(), _clockSource.get());
}
void tearDown() override {
_runner->shutdown();
}
ClockSourceMock& clockSource() {
return *_clockSource;
}
PeriodicRunner& runner() {
return *_runner;
}
private:
std::unique_ptr<ServiceContext> _svc;
std::unique_ptr<ClockSourceMock> _clockSource;
std::unique_ptr<PeriodicRunner> _runner;
};
class PeriodicRunnerImplTest : public PeriodicRunnerImplTestNoSetup {
public:
void setUp() override {
PeriodicRunnerImplTestNoSetup::setUp();
runner().startup();
}
};
TEST_F(PeriodicRunnerImplTest, OneJobTest) {
int count = 0;
Milliseconds interval{5};
stdx::mutex mutex;
stdx::condition_variable cv;
// Add a job, ensure that it runs once
PeriodicRunner::PeriodicJob job("job",
[&count, &mutex, &cv](Client*) {
{
stdx::unique_lock<stdx::mutex> lk(mutex);
count++;
}
cv.notify_all();
},
interval);
runner().scheduleJob(std::move(job));
// Fast forward ten times, we should run all ten times.
for (int i = 0; i < 10; i++) {
clockSource().advance(interval);
{
stdx::unique_lock<stdx::mutex> lk(mutex);
cv.wait(lk, [&count, &i] { return count > i; });
}
}
tearDown();
}
TEST_F(PeriodicRunnerImplTestNoSetup, ScheduleBeforeStartupTest) {
int count = 0;
Milliseconds interval{5};
stdx::mutex mutex;
stdx::condition_variable cv;
// Schedule a job before startup
PeriodicRunner::PeriodicJob job("job",
[&count, &mutex, &cv](Client*) {
{
stdx::unique_lock<stdx::mutex> lk(mutex);
count++;
}
cv.notify_all();
},
interval);
runner().scheduleJob(std::move(job));
// Start the runner, job should still run
runner().startup();
clockSource().advance(interval);
{
stdx::unique_lock<stdx::mutex> lk(mutex);
cv.wait(lk, [&count] { return count > 0; });
}
tearDown();
}
TEST_F(PeriodicRunnerImplTest, TwoJobsTest) {
int countA = 0;
int countB = 0;
Milliseconds intervalA{5};
Milliseconds intervalB{10};
stdx::mutex mutex;
stdx::condition_variable cv;
// Add two jobs, ensure they both run the proper number of times
PeriodicRunner::PeriodicJob jobA("job",
[&countA, &mutex, &cv](Client*) {
{
stdx::unique_lock<stdx::mutex> lk(mutex);
countA++;
}
cv.notify_all();
},
intervalA);
PeriodicRunner::PeriodicJob jobB("job",
[&countB, &mutex, &cv](Client*) {
{
stdx::unique_lock<stdx::mutex> lk(mutex);
countB++;
}
cv.notify_all();
},
intervalB);
runner().scheduleJob(std::move(jobA));
runner().scheduleJob(std::move(jobB));
// Fast forward and wait for both jobs to run the right number of times
for (int i = 0; i <= 10; i++) {
clockSource().advance(intervalA);
{
stdx::unique_lock<stdx::mutex> lk(mutex);
cv.wait(lk, [&countA, &countB, &i] { return (countA > i && countB >= i / 2); });
}
}
tearDown();
}
TEST_F(PeriodicRunnerImplTest, TwoJobsDontDeadlock) {
stdx::mutex mutex;
stdx::condition_variable cv;
stdx::condition_variable doneCv;
bool a = false;
bool b = false;
PeriodicRunner::PeriodicJob jobA("job",
[&](Client*) {
stdx::unique_lock<stdx::mutex> lk(mutex);
a = true;
cv.notify_one();
cv.wait(lk, [&] { return b; });
doneCv.notify_one();
},
Milliseconds(1));
PeriodicRunner::PeriodicJob jobB("job",
[&](Client*) {
stdx::unique_lock<stdx::mutex> lk(mutex);
b = true;
cv.notify_one();
cv.wait(lk, [&] { return a; });
doneCv.notify_one();
},
Milliseconds(1));
runner().scheduleJob(std::move(jobA));
runner().scheduleJob(std::move(jobB));
clockSource().advance(Milliseconds(1));
{
stdx::unique_lock<stdx::mutex> lk(mutex);
doneCv.wait(lk, [&] { return a && b; });
ASSERT(a);
ASSERT(b);
}
tearDown();
}
} // namespace
} // namespace mongo
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