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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.
*/
#pragma once
#include <deque>
#include "mongo/client/async_client.h"
#include "mongo/db/service_context.h"
#include "mongo/executor/connection_pool.h"
#include "mongo/executor/network_interface.h"
#include "mongo/rpc/metadata/metadata_hook.h"
#include "mongo/stdx/thread.h"
#include "mongo/stdx/unordered_map.h"
#include "mongo/transport/baton.h"
#include "mongo/transport/transport_layer.h"
namespace mongo {
namespace executor {
class NetworkInterfaceTL : public NetworkInterface {
public:
NetworkInterfaceTL(std::string instanceName,
ConnectionPool::Options connPoolOpts,
ServiceContext* ctx,
std::unique_ptr<NetworkConnectionHook> onConnectHook,
std::unique_ptr<rpc::EgressMetadataHook> metadataHook);
std::string getDiagnosticString() override;
void appendConnectionStats(ConnectionPoolStats* stats) const override;
std::string getHostName() override;
Counters getCounters() const override;
void startup() override;
void shutdown() override;
bool inShutdown() const override;
void waitForWork() override;
void waitForWorkUntil(Date_t when) override;
void signalWorkAvailable() override;
Date_t now() override;
Status startCommand(const TaskExecutor::CallbackHandle& cbHandle,
RemoteCommandRequest& request,
const RemoteCommandCompletionFn& onFinish,
const transport::BatonHandle& baton) override;
void cancelCommand(const TaskExecutor::CallbackHandle& cbHandle,
const transport::BatonHandle& baton) override;
Status setAlarm(Date_t when,
const stdx::function<void()>& action,
const transport::BatonHandle& baton) override;
bool onNetworkThread() override;
void dropConnections(const HostAndPort& hostAndPort) override;
private:
struct CommandState {
CommandState(RemoteCommandRequest request_,
TaskExecutor::CallbackHandle cbHandle_,
Promise<RemoteCommandResponse> promise_)
: request(std::move(request_)),
cbHandle(std::move(cbHandle_)),
promise(std::move(promise_)) {}
RemoteCommandRequest request;
TaskExecutor::CallbackHandle cbHandle;
Date_t deadline = RemoteCommandRequest::kNoExpirationDate;
Date_t start;
struct Deleter {
ConnectionPool::ConnectionHandleDeleter returner;
transport::ReactorHandle reactor;
void operator()(ConnectionPool::ConnectionInterface* ptr) const {
reactor->schedule(transport::Reactor::kDispatch,
[ ret = returner, ptr ] { ret(ptr); });
}
};
using ConnHandle = std::unique_ptr<ConnectionPool::ConnectionInterface, Deleter>;
ConnHandle conn;
std::unique_ptr<transport::ReactorTimer> timer;
AtomicBool done;
Promise<RemoteCommandResponse> promise;
};
void _run();
void _eraseInUseConn(const TaskExecutor::CallbackHandle& handle);
Future<RemoteCommandResponse> _onAcquireConn(std::shared_ptr<CommandState> state,
Future<RemoteCommandResponse> future,
CommandState::ConnHandle conn,
const transport::BatonHandle& baton);
std::string _instanceName;
ServiceContext* _svcCtx;
transport::TransportLayer* _tl;
// Will be created if ServiceContext is null, or if no TransportLayer was configured at startup
std::unique_ptr<transport::TransportLayer> _ownedTransportLayer;
transport::ReactorHandle _reactor;
mutable stdx::mutex _mutex;
ConnectionPool::Options _connPoolOpts;
std::unique_ptr<NetworkConnectionHook> _onConnectHook;
std::unique_ptr<ConnectionPool> _pool;
Counters _counters;
std::unique_ptr<rpc::EgressMetadataHook> _metadataHook;
AtomicBool _inShutdown;
stdx::thread _ioThread;
stdx::mutex _inProgressMutex;
stdx::unordered_map<TaskExecutor::CallbackHandle, std::shared_ptr<CommandState>> _inProgress;
stdx::unordered_set<std::shared_ptr<transport::ReactorTimer>> _inProgressAlarms;
stdx::condition_variable _workReadyCond;
bool _isExecutorRunnable = false;
};
} // namespace executor
} // namespace mongo
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