128 lines
3.3 KiB
C++
128 lines
3.3 KiB
C++
// 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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#include "rsocket/statemachine/RequestResponseResponder.h"
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namespace rsocket {
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void RequestResponseResponder::onSubscribe(
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std::shared_ptr<yarpl::single::SingleSubscription> subscription) {
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DCHECK(State::NEW != state_);
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if (state_ == State::CLOSED) {
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subscription->cancel();
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return;
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}
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producingSubscription_ = std::move(subscription);
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}
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void RequestResponseResponder::onSuccess(Payload response) {
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DCHECK(State::NEW != state_);
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if (!producingSubscription_) {
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return;
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}
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switch (state_) {
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case State::RESPONDING: {
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state_ = State::CLOSED;
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writePayload(std::move(response), true /* complete */);
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producingSubscription_ = nullptr;
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removeFromWriter();
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break;
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}
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case State::CLOSED:
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break;
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case State::NEW:
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default:
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// class is internally misused
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CHECK(false);
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}
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}
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void RequestResponseResponder::onError(folly::exception_wrapper ex) {
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DCHECK(State::NEW != state_);
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producingSubscription_ = nullptr;
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switch (state_) {
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case State::RESPONDING: {
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state_ = State::CLOSED;
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if (!ex.with_exception([this](rsocket::ErrorWithPayload& err) {
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writeApplicationError(std::move(err.payload));
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})) {
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writeApplicationError(ex.get_exception()->what());
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}
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removeFromWriter();
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} break;
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case State::CLOSED:
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break;
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case State::NEW:
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default:
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// class is internally misused
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CHECK(false);
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}
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}
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void RequestResponseResponder::handleCancel() {
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switch (state_) {
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case State::RESPONDING:
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state_ = State::CLOSED;
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removeFromWriter();
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break;
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case State::NEW:
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case State::CLOSED:
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break;
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}
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}
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void RequestResponseResponder::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) {
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payloadFragments_.addPayloadIgnoreFlags(std::move(payload));
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if (flagsFollows) {
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// there will be more fragments to come
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return;
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}
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CHECK(state_ == State::NEW);
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Payload finalPayload = payloadFragments_.consumePayloadIgnoreFlags();
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state_ = State::RESPONDING;
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onNewStreamReady(
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StreamType::REQUEST_RESPONSE,
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std::move(finalPayload),
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shared_from_this());
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}
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void RequestResponseResponder::endStream(StreamCompletionSignal signal) {
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switch (state_) {
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case State::NEW:
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case State::RESPONDING:
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// Spontaneous ::endStream signal means an error.
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DCHECK(StreamCompletionSignal::COMPLETE != signal);
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DCHECK(StreamCompletionSignal::CANCEL != signal);
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state_ = State::CLOSED;
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break;
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case State::CLOSED:
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break;
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}
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if (auto subscription = std::move(producingSubscription_)) {
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subscription->cancel();
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}
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}
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} // namespace rsocket
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