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/**
* Copyright (C) 2013 10gen 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.
*/
// DeadlineMonitor unit tests
#include "mongo/platform/basic.h"
#include "mongo/scripting/deadline_monitor.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
using std::shared_ptr;
using std::vector;
class TaskGroup {
public:
TaskGroup() : _c(), _killCount(0), _targetKillCount(0) {}
void noteKill() {
stdx::lock_guard<stdx::mutex> lk(_m);
++_killCount;
if (_killCount >= _targetKillCount)
_c.notify_one();
}
void waitForKillCount(uint64_t target) {
stdx::unique_lock<stdx::mutex> lk(_m);
_targetKillCount = target;
while (_killCount < _targetKillCount)
_c.wait(lk);
}
private:
stdx::mutex _m;
stdx::condition_variable _c;
uint64_t _killCount;
uint64_t _targetKillCount;
};
class Task {
public:
Task() : _group(NULL), _killed(0) {}
explicit Task(TaskGroup* group) : _group(group), _killed(0) {}
void kill() {
_killed = curTimeMillis64();
if (_group)
_group->noteKill();
}
void interrupt() {}
TaskGroup* _group;
uint64_t _killed;
};
// single task expires before stopping the deadline
TEST(DeadlineMonitor, ExpireThenRemove) {
DeadlineMonitor<Task> dm;
TaskGroup group;
Task task(&group);
dm.startDeadline(&task, 10);
group.waitForKillCount(1);
ASSERT(task._killed);
ASSERT(!dm.stopDeadline(&task));
}
// single task deadline stopped before the task expires
TEST(DeadlineMonitor, RemoveBeforeExpire) {
DeadlineMonitor<Task> dm;
Task task;
dm.startDeadline(&task, 3600 * 1000);
ASSERT(dm.stopDeadline(&task));
ASSERT(!task._killed);
}
// multiple tasks complete before deadline expires (with 10ms window)
TEST(DeadlineMonitor, MultipleTasksCompleteBeforeExpire) {
DeadlineMonitor<Task> dm;
vector<shared_ptr<Task>> tasks;
// start 100 tasks with varying deadlines (1-100 hours)
for (int i = 1; i <= 100; i++) {
shared_ptr<Task> task(new Task());
dm.startDeadline(task.get(), i * 3600 * 1000);
tasks.push_back(task);
}
// verify each deadline is stopped arrival
for (vector<shared_ptr<Task>>::iterator i = tasks.begin(); i != tasks.end(); ++i) {
ASSERT(dm.stopDeadline(i->get()));
ASSERT(!(*i)->_killed);
}
}
// multiple tasks expire before stopping the deadline
TEST(DeadlineMonitor, MultipleTasksExpire) {
DeadlineMonitor<Task> dm;
TaskGroup group;
vector<shared_ptr<Task>> tasks;
// start 100 tasks with varying deadlines
for (int i = 1; i <= 100; i++) {
shared_ptr<Task> task(new Task(&group));
dm.startDeadline(task.get(), i);
tasks.push_back(task);
}
group.waitForKillCount(100);
// verify each deadline has expired
for (vector<shared_ptr<Task>>::iterator i = tasks.begin(); i != tasks.end(); ++i) {
ASSERT(!dm.stopDeadline(i->get()));
ASSERT((*i)->_killed);
}
}
// mixed expiration and completion
TEST(DeadlineMonitor, MultipleTasksExpireOrComplete) {
DeadlineMonitor<Task> dm;
TaskGroup group;
vector<shared_ptr<Task>> expiredTasks; // tasks that should expire
vector<shared_ptr<Task>> stoppedTasks; // tasks that should not expire
// start 100 tasks with varying deadlines
for (int i = 1; i <= 100; i++) {
shared_ptr<Task> task(new Task(&group));
if (i % 2 == 0) {
// stop every other task
dm.startDeadline(task.get(), i * 3600 * 1000);
dm.stopDeadline(task.get());
stoppedTasks.push_back(task);
continue;
}
dm.startDeadline(task.get(), i);
expiredTasks.push_back(task);
}
group.waitForKillCount(50);
// check tasks which exceed the deadline
for (vector<shared_ptr<Task>>::iterator i = expiredTasks.begin(); i != expiredTasks.end();
++i) {
ASSERT(!dm.stopDeadline(i->get()));
ASSERT((*i)->_killed);
}
// check tasks with a deadline that was stopped
for (vector<shared_ptr<Task>>::iterator i = stoppedTasks.begin(); i != stoppedTasks.end();
++i) {
ASSERT(!(*i)->_killed);
}
}
} // namespace mongo
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