Last active
March 11, 2021 15:59
-
-
Save alok87/d9d08a95b3af38eea7e374339f66c199 to your computer and use it in GitHub Desktop.
subscription_manager_with_debug_flags_1.27.2
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
func (bc *brokerConsumer) subscriptionManager() { | |
var buffer []*partitionConsumer | |
for { | |
if len(buffer) > 0 { | |
select { | |
case event, ok := <-bc.input: | |
if !ok { | |
klog.V(2).Info("subscriptionManager() empty receive (bc.input closed)") | |
goto done | |
} | |
klog.V(2).Infof("subscriptionManager() received %s, buffer(%v)=%v", event.topic, len(buffer), buffer) | |
buffer = append(buffer, event) | |
klog.V(2).Infof("subscriptionManager() received %s, buffer(%v)=%v (appended)", event.topic, len(buffer), buffer) | |
case bc.newSubscriptions <- buffer: | |
klog.V(2).Infof("subscriptionManager() sent buffer(%v)=%v, buffer set nil", len(buffer), buffer) | |
buffer = nil | |
case bc.wait <- none{}: | |
klog.V(2).Info("subscriptionManager() bc.wait()") | |
} | |
} else { | |
select { | |
case event, ok := <-bc.input: | |
if !ok { | |
klog.V(2).Info("subscriptionManager() buffer=0, empty receive (bc.input closed)") | |
goto done | |
} | |
klog.V(2).Infof("subscriptionManager() received %s, buffer(%v)=%v", event.topic, len(buffer), buffer) | |
buffer = append(buffer, event) | |
klog.V(2).Infof("subscriptionManager() received %s, buffer(%v)=%v (appended)", event.topic, len(buffer), buffer) | |
case bc.newSubscriptions <- nil: | |
klog.V(2).Info("subscriptionManager() bc.newSubscriptions <- nil") | |
} | |
} | |
} | |
done: | |
klog.V(2).Info("subscriptionManager() close(bc.wait)") | |
close(bc.wait) | |
if len(buffer) > 0 { | |
klog.V(2).Infof("subscriptionManager() buffer > 0, sent buffer(%v)=%v", len(buffer), buffer) | |
bc.newSubscriptions <- buffer | |
} | |
klog.V(2).Info("subscriptionManager() close(bc.newSubscriptions)") | |
close(bc.newSubscriptions) | |
} | |
//subscriptionConsumer ensures we will get nil right away if no new subscriptions is available | |
func (bc *brokerConsumer) subscriptionConsumer() { | |
klog.V(2).Infof("subscriptionConsumer(%v) STARTING FOR LOOP", bc.broker.ID()) | |
klog.V(2).Infof("subscriptionConsumer(%v) waiting", bc.broker.ID()) | |
<-bc.wait // wait for our first piece of work | |
klog.V(2).Infof("subscriptionConsumer(%v) resuming...", bc.broker.ID()) | |
for newSubscriptions := range bc.newSubscriptions { | |
klog.V(2).Infof("subscriptionConsumer(%v) updating newSubscription=%+v", bc.broker.ID(), newSubscriptions) | |
bc.updateSubscriptions(newSubscriptions) | |
if len(bc.subscriptions) == 0 { | |
// We're about to be shut down or we're about to receive more subscriptions. | |
// Either way, the signal just hasn't propagated to our goroutine yet. | |
klog.V(2).Infof("subscriptionConsumer(%v) bc.subscriptions==0 waiting", bc.broker.ID()) | |
<-bc.wait | |
continue | |
} | |
klog.V(2).Infof("subscriptionConsumer(%v) fetchNewMessages()", bc.broker.ID()) | |
response, err := bc.fetchNewMessages() | |
if err != nil { | |
klog.V(2).Infof("subscriptionConsumer(%v) aborting due to fetchNewMessages err(), err =%+v", bc.broker.ID(), err) | |
Logger.Printf("consumer/broker/%d disconnecting due to error processing FetchRequest: %s\n", bc.broker.ID(), err) | |
bc.abort(err) | |
return | |
} | |
bc.acks.Add(len(bc.subscriptions)) | |
for child := range bc.subscriptions { | |
child.feeder <- response | |
} | |
bc.acks.Wait() | |
bc.handleResponses() | |
} | |
} | |
func (bc *brokerConsumer) updateSubscriptions(newSubscriptions []*partitionConsumer) { | |
for _, child := range newSubscriptions { | |
klog.V(2).Infof("updateSubscriptions(%s)", child.topic) | |
bc.subscriptions[child] = none{} | |
Logger.Printf("consumer/broker/%d added subscription to %s/%d\n", bc.broker.ID(), child.topic, child.partition) | |
} | |
for child := range bc.subscriptions { | |
select { | |
case <-child.dying: | |
Logger.Printf("consumer/broker/%d closed dead subscription to %s/%d\n", bc.broker.ID(), child.topic, child.partition) | |
close(child.trigger) | |
delete(bc.subscriptions, child) | |
default: | |
// no-op | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment