mirror of
https://github.com/openziti/ziti.git
synced 2026-10-12 15:28:05 +00:00
Paul Lorenz
124 lines
3.2 KiB
Go
124 lines
3.2 KiB
Go
/*
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Copyright NetFoundry, Inc.
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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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https://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package handler_link
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import (
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"github.com/ef-ds/deque"
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"github.com/michaelquigley/pfxlog"
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"github.com/openziti/channel"
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"github.com/openziti/fabric/router/forwarder"
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"github.com/openziti/fabric/router/xgress"
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"github.com/openziti/fabric/router/xlink"
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"sync/atomic"
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)
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type queuingAckHandler struct {
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link xlink.Xlink
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forwarder *forwarder.Forwarder
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acks *deque.Deque
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ackIngest chan *xgress.Acknowledgement
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ackForward chan *xgress.Acknowledgement
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acksQueueSize int64
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closeNotify <-chan struct{}
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}
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func newQueuingAckHandler(link xlink.Xlink, forwarder *forwarder.Forwarder, closeNotify <-chan struct{}) *queuingAckHandler {
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result := &queuingAckHandler{
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link: link,
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forwarder: forwarder,
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acks: deque.New(),
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ackIngest: make(chan *xgress.Acknowledgement, 16),
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ackForward: make(chan *xgress.Acknowledgement, 1),
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closeNotify: closeNotify,
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}
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go result.ackIngester()
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go result.ackForwarder()
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forwarder.MetricsRegistry().FuncGauge("xgress.acks.queue_size", func() int64 {
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return atomic.LoadInt64(&result.acksQueueSize)
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})
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return result
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}
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func (self *queuingAckHandler) ContentType() int32 {
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return xgress.ContentTypeAcknowledgementType
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}
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func (self *queuingAckHandler) HandleReceive(msg *channel.Message, ch channel.Channel) {
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if ack, err := xgress.UnmarshallAcknowledgement(msg); err == nil {
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select {
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case self.ackIngest <- ack:
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case <-self.closeNotify:
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}
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} else {
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pfxlog.ContextLogger(ch.Label()).
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WithField("linkId", self.link.Id().Token).
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WithField("routerId", self.link.DestinationId()).
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WithError(err).
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Error("error unmarshalling ack")
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}
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}
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func (self *queuingAckHandler) ackIngester() {
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var next *xgress.Acknowledgement
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for {
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if next == nil {
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if val, _ := self.acks.PopFront(); val != nil {
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next = val.(*xgress.Acknowledgement)
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}
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}
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if next == nil {
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select {
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case ack := <-self.ackIngest:
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self.acks.PushBack(ack)
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case <-self.closeNotify:
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return
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}
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} else {
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select {
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case ack := <-self.ackIngest:
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self.acks.PushBack(ack)
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case self.ackForward <- next:
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next = nil
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case <-self.closeNotify:
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return
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}
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}
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atomic.StoreInt64(&self.acksQueueSize, int64(self.acks.Len()))
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}
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}
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func (self *queuingAckHandler) ackForwarder() {
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logger := pfxlog.Logger()
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for {
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select {
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case ack := <-self.ackForward:
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if err := self.forwarder.ForwardAcknowledgement(xgress.Address(self.link.Id().Token), ack); err != nil {
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logger.WithField("linkId", self.link.Id().Token).
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WithField("routerId", self.link.DestinationId()).
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WithError(err).
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Debug("unable to forward acknowledgement")
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}
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case <-self.closeNotify:
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return
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}
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}
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}
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