jsancio commented on a change in pull request #11109:
URL: https://github.com/apache/kafka/pull/11109#discussion_r675915832
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File path: raft/src/main/java/org/apache/kafka/raft/KafkaRaftClient.java
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@@ -2381,25 +2396,51 @@ public void complete() {
}
}
- private final class ListenerContext implements
CloseListener<BatchReader<T>> {
+ private static enum RegistrationOps {
+ REGISTER, UNREGISTER
+ }
+
+ private final class Registration {
+ private final RegistrationOps ops;
+ private final Listener<T> listener;
+
+ private Registration(RegistrationOps ops, Listener<T> listener) {
+ this.ops = ops;
+ this.listener = listener;
+ }
+
+ private void update(Map<Listener<T>, KafkaListenerContext> contexts) {
+ if (ops == RegistrationOps.REGISTER) {
+ if (contexts.putIfAbsent(listener, new
KafkaListenerContext(listener)) != null) {
+ logger.error("Attempting to add a listener that already
exists: {}", listenerName(listener));
+ }
+ } else {
+ if (contexts.remove(listener) == null) {
+ logger.error("Attempting to remove a listener context that
doesn't exists: {}", listenerName(listener));
+ }
+ }
+ }
+ }
+
+ private final class KafkaListenerContext implements
CloseListener<BatchReader<T>> {
Review comment:
Done.
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