88 lines
2.5 KiB
C
88 lines
2.5 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/RSocketResponder.h"
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#include "rsocket/benchmarks/Latch.h"
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namespace rsocket {
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/// Responder that always sends back a fixed message.
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class FixedResponder : public RSocketResponder {
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public:
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explicit FixedResponder(const std::string& message)
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: message_{folly::IOBuf::copyBuffer(message)} {}
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/// Infinitely streams back the message.
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std::shared_ptr<yarpl::flowable::Flowable<Payload>> handleRequestStream(
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Payload,
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StreamId) override {
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return yarpl::flowable::Flowable<Payload>::fromGenerator(
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[msg = message_->clone()] { return Payload(msg->clone()); });
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}
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std::shared_ptr<yarpl::single::Single<Payload>> handleRequestResponse(
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Payload,
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StreamId) override {
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return yarpl::single::Singles::fromGenerator<Payload>(
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[msg = message_->clone()] { return Payload(msg->clone()); });
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}
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private:
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std::unique_ptr<folly::IOBuf> message_;
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};
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/// Subscriber that requests N items and cancels the subscription once all of
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/// them arrive. Signals a latch when it terminates.
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class BoundedSubscriber : public yarpl::flowable::BaseSubscriber<Payload> {
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public:
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BoundedSubscriber(Latch& latch, size_t requested)
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: latch_{latch}, requested_{requested} {}
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void onSubscribeImpl() override {
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this->request(requested_);
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}
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void onNextImpl(Payload) override {
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if (received_.fetch_add(1) == requested_ - 1) {
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DCHECK(!terminated_.exchange(true));
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latch_.post();
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// After this cancel we could be destroyed.
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this->cancel();
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}
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}
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void onCompleteImpl() override {
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if (!terminated_.exchange(true)) {
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latch_.post();
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}
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}
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void onErrorImpl(folly::exception_wrapper) override {
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if (!terminated_.exchange(true)) {
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latch_.post();
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}
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}
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private:
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Latch& latch_;
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std::atomic_bool terminated_{false};
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size_t requested_{0};
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std::atomic<size_t> received_{0};
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};
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} // namespace rsocket
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