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/*
*
* Copyright 2015-2016, 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 GRPCXX_IMPL_CODEGEN_ASYNC_UNARY_CALL_H
#define GRPCXX_IMPL_CODEGEN_ASYNC_UNARY_CALL_H
#include <grpc++/impl/codegen/call.h>
#include <grpc++/impl/codegen/channel_interface.h>
#include <grpc++/impl/codegen/client_context.h>
#include <grpc++/impl/codegen/server_context.h>
#include <grpc++/impl/codegen/service_type.h>
#include <grpc++/impl/codegen/status.h>
#include <grpc/impl/codegen/log.h>
namespace grpc {
class CompletionQueue;
template <class R>
class ClientAsyncResponseReaderInterface {
public:
virtual ~ClientAsyncResponseReaderInterface() {}
virtual void ReadInitialMetadata(void* tag) = 0;
virtual void Finish(R* msg, Status* status, void* tag) = 0;
};
template <class R>
class ClientAsyncResponseReader GRPC_FINAL
: public ClientAsyncResponseReaderInterface<R> {
public:
template <class W>
ClientAsyncResponseReader(ChannelInterface* channel, CompletionQueue* cq,
const RpcMethod& method, ClientContext* context,
const W& request)
: context_(context),
call_(channel->CreateCall(method, context, cq)),
collection_(new CallOpSetCollection) {
collection_->init_buf_.SetCollection(collection_);
collection_->init_buf_.SendInitialMetadata(context->send_initial_metadata_);
// TODO(ctiller): don't assert
GPR_ASSERT(collection_->init_buf_.SendMessage(request).ok());
collection_->init_buf_.ClientSendClose();
call_.PerformOps(&collection_->init_buf_);
}
void ReadInitialMetadata(void* tag) {
GPR_ASSERT(!context_->initial_metadata_received_);
collection_->meta_buf_.SetCollection(collection_);
collection_->meta_buf_.set_output_tag(tag);
collection_->meta_buf_.RecvInitialMetadata(context_);
call_.PerformOps(&collection_->meta_buf_);
}
void Finish(R* msg, Status* status, void* tag) {
collection_->finish_buf_.SetCollection(collection_);
collection_->finish_buf_.set_output_tag(tag);
if (!context_->initial_metadata_received_) {
collection_->finish_buf_.RecvInitialMetadata(context_);
}
collection_->finish_buf_.RecvMessage(msg);
collection_->finish_buf_.ClientRecvStatus(context_, status);
call_.PerformOps(&collection_->finish_buf_);
}
private:
ClientContext* context_;
Call call_;
class CallOpSetCollection : public CallOpSetCollectionInterface {
public:
SneakyCallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
CallOpClientSendClose> init_buf_;
CallOpSet<CallOpRecvInitialMetadata> meta_buf_;
CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>,
CallOpClientRecvStatus> finish_buf_;
};
std::shared_ptr<CallOpSetCollection> collection_;
};
template <class W>
class ServerAsyncResponseWriter GRPC_FINAL
: public ServerAsyncStreamingInterface {
public:
explicit ServerAsyncResponseWriter(ServerContext* ctx)
: call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
void SendInitialMetadata(void* tag) GRPC_OVERRIDE {
GPR_ASSERT(!ctx_->sent_initial_metadata_);
meta_buf_.set_output_tag(tag);
meta_buf_.SendInitialMetadata(ctx_->initial_metadata_);
ctx_->sent_initial_metadata_ = true;
call_.PerformOps(&meta_buf_);
}
void Finish(const W& msg, const Status& status, void* tag) {
finish_buf_.set_output_tag(tag);
if (!ctx_->sent_initial_metadata_) {
finish_buf_.SendInitialMetadata(ctx_->initial_metadata_);
ctx_->sent_initial_metadata_ = true;
}
// The response is dropped if the status is not OK.
if (status.ok()) {
finish_buf_.ServerSendStatus(ctx_->trailing_metadata_,
finish_buf_.SendMessage(msg));
} else {
finish_buf_.ServerSendStatus(ctx_->trailing_metadata_, status);
}
call_.PerformOps(&finish_buf_);
}
void FinishWithError(const Status& status, void* tag) {
GPR_ASSERT(!status.ok());
finish_buf_.set_output_tag(tag);
if (!ctx_->sent_initial_metadata_) {
finish_buf_.SendInitialMetadata(ctx_->initial_metadata_);
ctx_->sent_initial_metadata_ = true;
}
finish_buf_.ServerSendStatus(ctx_->trailing_metadata_, status);
call_.PerformOps(&finish_buf_);
}
private:
void BindCall(Call* call) GRPC_OVERRIDE { call_ = *call; }
Call call_;
ServerContext* ctx_;
CallOpSet<CallOpSendInitialMetadata> meta_buf_;
CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
CallOpServerSendStatus> finish_buf_;
};
} // namespace grpc
#endif // GRPCXX_IMPL_CODEGEN_ASYNC_UNARY_CALL_H
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