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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 <vector>
#include "mongo/base/status.h"
#include "mongo/stdx/mutex.h"
#include "mongo/transport/session.h"
#include "mongo/transport/transport_layer.h"
#include "mongo/util/time_support.h"
namespace mongo {
struct ServerGlobalParams;
class ServiceContext;
namespace transport {
/**
* This TransportLayerManager is a TransportLayer implementation that holds other
* TransportLayers. Mongod and Mongos can treat this like the "only" TransportLayer
* and not be concerned with which other TransportLayer implementations it holds
* underneath.
*/
class TransportLayerManager final : public TransportLayer {
MONGO_DISALLOW_COPYING(TransportLayerManager);
public:
TransportLayerManager(std::vector<std::unique_ptr<TransportLayer>> tls)
: _tls(std::move(tls)) {}
TransportLayerManager();
StatusWith<SessionHandle> connect(HostAndPort peer,
ConnectSSLMode sslMode,
Milliseconds timeout) override;
Future<SessionHandle> asyncConnect(HostAndPort peer,
ConnectSSLMode sslMode,
const ReactorHandle& reactor,
Milliseconds timeout) override;
Status start() override;
void shutdown() override;
Status setup() override;
ReactorHandle getReactor(WhichReactor which) override;
// TODO This method is not called anymore, but may be useful to add new TransportLayers
// to the manager after it's been created.
Status addAndStartTransportLayer(std::unique_ptr<TransportLayer> tl);
/*
* This initializes a TransportLayerManager with the global configuration of the server.
*
* To setup networking in mongod/mongos, create a TransportLayerManager with this function,
* then call
* tl->setup();
* serviceContext->setTransportLayer(std::move(tl));
* serviceContext->getTransportLayer->start();
*/
static std::unique_ptr<TransportLayer> createWithConfig(const ServerGlobalParams* config,
ServiceContext* ctx);
static std::unique_ptr<TransportLayer> makeAndStartDefaultEgressTransportLayer();
BatonHandle makeBaton(OperationContext* opCtx) override {
stdx::lock_guard<stdx::mutex> lk(_tlsMutex);
// TODO: figure out what to do about managers with more than one transport layer.
invariant(_tls.size() == 1);
return _tls[0]->makeBaton(opCtx);
}
private:
template <typename Callable>
void _foreach(Callable&& cb) const;
mutable stdx::mutex _tlsMutex;
std::vector<std::unique_ptr<TransportLayer>> _tls;
};
} // namespace transport
} // namespace mongo
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