| Interface | Description | 
|---|---|
| ReliableMessageListener<E> | A  MessageListenerto better integrate with the reliable topic. | 
| 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. | 
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