| Interface | Description | 
|---|---|
| ClusterResourceListener | 
 A callback interface that users can implement when they wish to get notified about changes in the Cluster metadata. 
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| Configurable | 
 A Mix-in style interface for classes that are instantiated by reflection and need to take configuration parameters 
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| KafkaFuture.BaseFunction<A,B> | 
 A function which takes objects of type A and returns objects of type B. 
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| KafkaFuture.BiConsumer<A,B> | 
 A consumer of two different types of object. 
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| Metric | 
 A metric tracked for monitoring purposes. 
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| Reconfigurable | 
 Interface for reconfigurable classes that support dynamic configuration. 
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| Class | Description | 
|---|---|
| Cluster | 
 An immutable representation of a subset of the nodes, topics, and partitions in the Kafka cluster. 
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| ClusterResource | 
 The  
ClusterResource class encapsulates metadata for a Kafka cluster. | 
| Endpoint | 
 Represents a broker endpoint. 
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| KafkaFuture<T> | 
 A flexible future which supports call chaining and other asynchronous programming patterns. 
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| KafkaFuture.Function<A,B> | 
 A function which takes objects of type A and returns objects of type B. 
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| MetricName | 
 The  
MetricName class encapsulates a metric's name, logical group and its related attributes. | 
| MetricNameTemplate | 
 A template for a MetricName. 
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| Node | 
 Information about a Kafka node 
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| PartitionInfo | 
 This is used to describe per-partition state in the MetadataResponse. 
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| TopicPartition | 
 A topic name and partition number 
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| TopicPartitionInfo | 
 A class containing leadership, replicas and ISR information for a topic partition. 
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| TopicPartitionReplica | 
 The topic name, partition number and the brokerId of the replica 
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| Enum | Description | 
|---|---|
| ConsumerGroupState | 
 The consumer group state. 
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| ElectionType | |
| IsolationLevel | 
| Exception | Description | 
|---|---|
| InvalidRecordException | |
| KafkaException | 
 The base class of all other Kafka exceptions 
 |