88 lines
2.4 KiB
C++
88 lines
2.4 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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#include "rsocket/internal/KeepaliveTimer.h"
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namespace rsocket {
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KeepaliveTimer::KeepaliveTimer(
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std::chrono::milliseconds period,
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folly::EventBase& eventBase)
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: eventBase_(eventBase),
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generation_(std::make_shared<uint32_t>(0)),
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period_(period) {}
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KeepaliveTimer::~KeepaliveTimer() {
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stop();
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}
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std::chrono::milliseconds KeepaliveTimer::keepaliveTime() const {
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return period_;
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}
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void KeepaliveTimer::schedule() {
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const auto scheduledGeneration = *generation_;
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const auto generation = generation_;
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eventBase_.runAfterDelay(
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[this,
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wpConnection = std::weak_ptr<FrameSink>(connection_),
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generation,
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scheduledGeneration]() {
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auto spConnection = wpConnection.lock();
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if (!spConnection) {
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return;
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}
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if (*generation == scheduledGeneration) {
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sendKeepalive(*spConnection);
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}
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},
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static_cast<uint32_t>(keepaliveTime().count()));
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}
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void KeepaliveTimer::sendKeepalive(FrameSink& sink) {
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if (pending_) {
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stop();
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// TODO: we need to use max lifetime from the setup frame for this
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sink.disconnectOrCloseWithError(
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Frame_ERROR::connectionError("no response to keepalive"));
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} else {
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// this must happen before sendKeepalive as it can potentially result in
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// stop() being called
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pending_ = true;
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sink.sendKeepalive();
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schedule();
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}
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}
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// must be called from the same thread as start
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void KeepaliveTimer::stop() {
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*generation_ += 1;
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pending_ = false;
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connection_.reset();
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}
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// must be called from the same thread as stop
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void KeepaliveTimer::start(const std::shared_ptr<FrameSink>& connection) {
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connection_ = connection;
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*generation_ += 1;
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DCHECK(!pending_);
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schedule();
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}
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void KeepaliveTimer::keepaliveReceived() {
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pending_ = false;
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}
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} // namespace rsocket
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