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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_CALL_H__
#define __GRPCPP_CALL_H__
#include <grpc/grpc.h>
#include <grpc++/status.h>
#include <grpc++/completion_queue.h>
#include <memory>
#include <map>
namespace google {
namespace protobuf {
class Message;
} // namespace protobuf
} // namespace google
struct grpc_call;
struct grpc_op;
namespace grpc {
class Call;
class CallOpBuffer : public CompletionQueueTag {
public:
CallOpBuffer() : return_tag_(this) {}
~CallOpBuffer();
void Reset(void *next_return_tag);
// Does not take ownership.
void AddSendInitialMetadata(
std::multimap<grpc::string, grpc::string> *metadata);
void AddSendInitialMetadata(ClientContext *ctx);
void AddRecvInitialMetadata(ClientContext *ctx);
void AddSendMessage(const google::protobuf::Message &message);
void AddRecvMessage(google::protobuf::Message *message);
void AddClientSendClose();
void AddClientRecvStatus(ClientContext *ctx, Status *status);
void AddServerSendStatus(std::multimap<grpc::string, grpc::string> *metadata,
const Status &status);
void AddServerRecvClose(bool *cancelled);
// INTERNAL API:
// Convert to an array of grpc_op elements
void FillOps(grpc_op *ops, size_t *nops);
// Called by completion queue just prior to returning from Next() or Pluck()
bool FinalizeResult(void **tag, bool *status) override;
bool got_message = false;
private:
void *return_tag_ = nullptr;
// Send initial metadata
bool send_initial_metadata_ = false;
size_t initial_metadata_count_ = 0;
grpc_metadata *initial_metadata_ = nullptr;
// Recv initial metadta
std::multimap<grpc::string, grpc::string> *recv_initial_metadata_ = nullptr;
grpc_metadata_array recv_initial_metadata_arr_ = {0, 0, nullptr};
// Send message
const google::protobuf::Message *send_message_ = nullptr;
grpc_byte_buffer *send_message_buf_ = nullptr;
// Recv message
google::protobuf::Message *recv_message_ = nullptr;
grpc_byte_buffer *recv_message_buf_ = nullptr;
// Client send close
bool client_send_close_ = false;
// Client recv status
std::multimap<grpc::string, grpc::string> *recv_trailing_metadata_ = nullptr;
Status *recv_status_ = nullptr;
grpc_metadata_array recv_trailing_metadata_arr_ = {0, 0, nullptr};
grpc_status_code status_code_ = GRPC_STATUS_OK;
char *status_details_ = nullptr;
size_t status_details_capacity_ = 0;
// Server send status
const Status *send_status_ = nullptr;
size_t trailing_metadata_count_ = 0;
grpc_metadata *trailing_metadata_ = nullptr;
int cancelled_buf_;
bool *recv_closed_ = nullptr;
};
// Channel and Server implement this to allow them to hook performing ops
class CallHook {
public:
virtual ~CallHook() {}
virtual void PerformOpsOnCall(CallOpBuffer *ops, Call *call) = 0;
};
// Straightforward wrapping of the C call object
class Call final {
public:
/* call is owned by the caller */
Call(grpc_call *call, CallHook *call_hook_, CompletionQueue *cq);
void PerformOps(CallOpBuffer *buffer);
grpc_call *call() { return call_; }
CompletionQueue *cq() { return cq_; }
private:
CallHook *call_hook_;
CompletionQueue *cq_;
grpc_call *call_;
};
} // namespace grpc
#endif // __GRPCPP_CALL_INTERFACE_H__
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