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/*
*
* Copyright 2014, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef __GRPCPP_SERVER_CONTEXT_H_
#define __GRPCPP_SERVER_CONTEXT_H_
#include <grpc++/completion_queue.h>
#include <chrono>
#include <map>
#include <mutex>
#include "config.h"
struct gpr_timespec;
struct grpc_metadata;
struct grpc_call;
namespace grpc {
template <class W, class R>
class ServerAsyncReader;
template <class W>
class ServerAsyncWriter;
template <class W>
class ServerAsyncResponseWriter;
template <class R, class W>
class ServerAsyncReaderWriter;
template <class R>
class ServerReader;
template <class W>
class ServerWriter;
template <class R, class W>
class ServerReaderWriter;
class CallOpBuffer;
class Server;
// Interface of server side rpc context.
class ServerContext final {
public:
ServerContext(); // for async calls
~ServerContext();
std::chrono::system_clock::time_point absolute_deadline() {
return deadline_;
}
void AddInitialMetadata(const grpc::string& key, const grpc::string& value);
void AddTrailingMetadata(const grpc::string& key, const grpc::string& value);
bool IsCancelled() { return completion_op_.CheckCancelled(cq_); }
std::multimap<grpc::string, grpc::string> client_metadata() {
return client_metadata_;
}
private:
friend class ::grpc::Server;
template <class W, class R>
friend class ::grpc::ServerAsyncReader;
template <class W>
friend class ::grpc::ServerAsyncWriter;
template <class W>
friend class ::grpc::ServerAsyncResponseWriter;
template <class R, class W>
friend class ::grpc::ServerAsyncReaderWriter;
template <class R>
friend class ::grpc::ServerReader;
template <class W>
friend class ::grpc::ServerWriter;
template <class R, class W>
friend class ::grpc::ServerReaderWriter;
class CompletionOp final : public CompletionQueueTag {
public:
bool FinalizeResult(void** tag, bool* status) override;
bool CheckCancelled(CompletionQueue* cq);
private:
std::mutex mu_;
bool finalized_ = false;
int cancelled_ = 0;
};
ServerContext(gpr_timespec deadline, grpc_metadata* metadata,
size_t metadata_count);
CompletionOp completion_op_;
std::chrono::system_clock::time_point deadline_;
grpc_call* call_ = nullptr;
CompletionQueue* cq_ = nullptr;
bool sent_initial_metadata_ = false;
std::multimap<grpc::string, grpc::string> client_metadata_;
std::multimap<grpc::string, grpc::string> initial_metadata_;
std::multimap<grpc::string, grpc::string> trailing_metadata_;
};
} // namespace grpc
#endif // __GRPCPP_SERVER_CONTEXT_H_
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