71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
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// Copyright (c) Facebook, Inc. and its affiliates.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include "rsocket/Payload.h"
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#include "rsocket/statemachine/StreamStateMachineBase.h"
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#include "yarpl/single/SingleObserver.h"
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#include "yarpl/single/SingleSubscription.h"
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namespace rsocket {
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/// Implementation of stream stateMachine that represents a RequestResponse
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/// requester
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class RequestResponseRequester
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: public StreamStateMachineBase,
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public yarpl::single::SingleSubscription,
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public std::enable_shared_from_this<RequestResponseRequester> {
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public:
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RequestResponseRequester(
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std::shared_ptr<StreamsWriter> writer,
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StreamId streamId,
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Payload payload)
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: StreamStateMachineBase(std::move(writer), streamId),
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initialPayload_(std::move(payload)) {}
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void subscribe(
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std::shared_ptr<yarpl::single::SingleObserver<Payload>> subscriber);
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private:
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void cancel() noexcept override;
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void handlePayload(
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Payload&& payload,
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bool flagsComplete,
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bool flagsNext,
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bool flagsFollows) override;
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void handleError(folly::exception_wrapper ew) override;
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void endStream(StreamCompletionSignal signal) override;
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size_t getConsumerAllowance() const override;
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/// State of the Subscription requester.
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enum class State : uint8_t {
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NEW,
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REQUESTED,
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CLOSED,
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};
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State state_{State::NEW};
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/// The observer that will consume payloads.
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std::shared_ptr<yarpl::single::SingleObserver<Payload>> consumingSubscriber_;
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/// Initial payload which has to be sent with 1st request.
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Payload initialPayload_;
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};
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} // namespace rsocket
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