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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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.
*/
#pragma once
#include "mongo/db/service_context.h"
#include "mongo/db/service_liaison.h"
#include "mongo/executor/async_timer_mock.h"
#include "mongo/platform/atomic_word.h"
#include "mongo/platform/mutex.h"
#include "mongo/stdx/condition_variable.h"
#include "mongo/util/periodic_runner.h"
#include "mongo/util/time_support.h"
namespace mongo {
/**
* To allow us to move a MockServiceLiaison into the session cache while
* maintaining a hold on it from within our unit tests, the MockServiceLiaison
* will have an internal pointer to a MockServiceLiaisonImpl object that the
* test creates and controls.
*
* This class maintains an internal _activeSessions list that may be modified
* by the test caller. It also maintains an internal mocked representation of
* time, which the caller can fastForward(). The Date_t returned by now() will
* be the epoch + the amount of minutes this object has been fast-forwarded over
* course of its life.
*
* This service liaison starts up its internal periodic runner on construction.
*/
class MockServiceLiaisonImpl {
public:
MockServiceLiaisonImpl();
// Forwarding methods from the MockServiceLiaison
LogicalSessionIdSet getActiveOpSessions() const;
LogicalSessionIdSet getOpenCursorSessions(OperationContext* opCtx) const;
Date_t now() const;
void scheduleJob(PeriodicRunner::PeriodicJob job);
void join();
// Test-side methods that operate on the _activeSessions list.
void add(LogicalSessionId lsid);
void remove(LogicalSessionId lsid);
void clear();
void addCursorSession(LogicalSessionId lsid);
void removeCursorSession(LogicalSessionId lsid);
void clearCursorSession();
void fastForward(Milliseconds time);
int jobs();
const KillAllSessionsByPattern* matchKilled(const LogicalSessionId& lsid);
std::pair<Status, int> killCursorsWithMatchingSessions(OperationContext* opCtx,
const SessionKiller::Matcher& matcher);
private:
std::unique_ptr<executor::AsyncTimerFactoryMock> _timerFactory;
std::unique_ptr<PeriodicRunner> _runner;
boost::optional<SessionKiller::Matcher> _matcher;
mutable Mutex _mutex = MONGO_MAKE_LATCH("MockServiceLiaisonImpl::_mutex");
LogicalSessionIdSet _activeSessions;
LogicalSessionIdSet _cursorSessions;
};
/**
* A mock service liaison for testing the logical session cache.
*/
class MockServiceLiaison : public ServiceLiaison {
public:
explicit MockServiceLiaison(std::shared_ptr<MockServiceLiaisonImpl> impl)
: _impl(std::move(impl)) {}
LogicalSessionIdSet getActiveOpSessions() const override {
return _impl->getActiveOpSessions();
}
LogicalSessionIdSet getOpenCursorSessions(OperationContext* opCtx) const override {
return _impl->getOpenCursorSessions(opCtx);
}
Date_t now() const override {
return _impl->now();
}
void scheduleJob(PeriodicRunner::PeriodicJob job) override {
_impl->scheduleJob(std::move(job));
}
void join() override {
return _impl->join();
}
std::pair<Status, int> killCursorsWithMatchingSessions(
OperationContext* opCtx, const SessionKiller::Matcher& matcher) override {
return _impl->killCursorsWithMatchingSessions(opCtx, matcher);
}
protected:
ServiceContext* _context() override {
return _serviceContext.get();
}
private:
std::shared_ptr<MockServiceLiaisonImpl> _impl;
ServiceContext::UniqueServiceContext _serviceContext;
};
} // namespace mongo
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