| MessageEvent<T> | Represents a message being published to a topic
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| Topic<T extends Serializable> | |
| TopicListener<T extends Serializable> | Callback interface for messages sent to a topic. |
| TopicService | Provides a mechanism for publishing messages to multiple subscribers, both local and cluster-wide. |
| TopicSettings<T extends Serializable> | Settings for creating a Topic. |
| TopicSettings.Builder<T extends Serializable> |