cartographer/cartographer_grpc/framework/service.h

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/*
* Copyright 2017 The Cartographer Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef CARTOGRAPHER_GRPC_FRAMEWORK_SERVICE_H
#define CARTOGRAPHER_GRPC_FRAMEWORK_SERVICE_H
#include "cartographer_grpc/framework/completion_queue_thread.h"
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#include "cartographer_grpc/framework/event_queue_thread.h"
#include "cartographer_grpc/framework/execution_context.h"
#include "cartographer_grpc/framework/rpc.h"
#include "cartographer_grpc/framework/rpc_handler.h"
#include "grpc++/impl/codegen/service_type.h"
namespace cartographer_grpc {
namespace framework {
// A 'Service' represents a generic service for gRPC asynchronous methods and is
// responsible for managing the lifetime of active RPCs issued against methods
// of the service and distributing incoming gRPC events to their respective
// 'Rpc' handler objects.
class Service : public ::grpc::Service {
public:
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using EventQueueSelector = std::function<EventQueue*()>;
friend class Rpc;
Service(const std::string& service_name,
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const std::map<std::string, RpcHandlerInfo>& rpc_handlers,
EventQueueSelector event_queue_selector);
void StartServing(std::vector<CompletionQueueThread>& completion_queues,
ExecutionContext* execution_context);
void HandleEvent(Rpc::Event event, Rpc* rpc, bool ok);
void StopServing();
private:
void HandleNewConnection(Rpc* rpc, bool ok);
void HandleRead(Rpc* rpc, bool ok);
void HandleWrite(Rpc* rpc, bool ok);
void HandleFinish(Rpc* rpc, bool ok);
void HandleDone(Rpc* rpc, bool ok);
void RemoveIfNotPending(Rpc* rpc);
std::map<std::string, RpcHandlerInfo> rpc_handler_infos_;
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EventQueueSelector event_queue_selector_;
ActiveRpcs active_rpcs_;
bool shutting_down_ = false;
};
} // namespace framework
} // namespace cartographer_grpc
#endif // CARTOGRAPHER_GRPC_FRAMEWORK_SERVICE_H