| Interface | Description | 
|---|---|
| ITopic<E> | Hazelcast provides distribution mechanism for publishing messages that are
 delivered to multiple subscribers, which is also known as a publish/subscribe
 (pub/sub) messaging model. | 
| LocalTopicStats | Local topic statistics to be used by  MemberStateimplementations. | 
| MessageListener<E> | Message listener for  ITopic. | 
| ReliableMessageListener<E> | A  MessageListenerto better integrate with the reliable topic. | 
| Class | Description | 
|---|---|
| Message<E> | Message for  ITopic. | 
| Enum | Description | 
|---|---|
| TopicOverloadPolicy | A policy to deal with an overloaded topic; so topic where there is no
 place to store new messages. | 
| Exception | Description | 
|---|---|
| TopicOverloadException | A  HazelcastExceptionthrown when a publisher wants to write to a topic, but there is not sufficient storage
 to deal with the event. | 
ITopic.Copyright © 2022 Hazelcast, Inc.. All rights reserved.