Package org.apache.kafka.streams.processor

Interface Summary

Interface	Description
BatchingStateRestoreCallback	Interface for batching restoration of a StateStore It is expected that implementations of this class will not call the StateRestoreCallback.restore(byte[], byte[]) method.
Cancellable	Cancellable interface returned in ProcessorContext.schedule(long, PunctuationType, Punctuator).
PartitionGrouper	A partition grouper that generates partition groups given the list of topic-partitions.
Processor<K,V>	A processor of key-value pair records.
ProcessorContext	Processor context interface.
ProcessorSupplier<K,V>	A processor supplier that can create one or more Processor instances.
Punctuator	A functional interface used as an argument to ProcessorContext.schedule(long, PunctuationType, Punctuator).
StateRestoreCallback	Restoration logic for log-backed state stores upon restart, it takes one record at a time from the logs to apply to the restoring state.
StateRestoreListener	Class for listening to various states of the restoration process of a StateStore.
StateStore	A storage engine for managing state maintained by a stream processor.
StateStoreSupplier<T extends StateStore>	Deprecated. use StoreSupplier
StreamPartitioner<K,V>	Determine how records are distributed among the partitions in a Kafka topic.
TimestampExtractor	An interface that allows the Kafka Streams framework to extract a timestamp from an instance of ConsumerRecord.

Class Summary

Class	Description
AbstractNotifyingBatchingRestoreCallback	Abstract implementation of the BatchingStateRestoreCallback used for batch restoration operations.
AbstractNotifyingRestoreCallback	Abstract implementation of the StateRestoreCallback used for batch restoration operations.
AbstractProcessor<K,V>	An abstract implementation of Processor that manages the ProcessorContext instance and provides default no-op implementations of AbstractProcessor.punctuate(long) and AbstractProcessor.close().
DefaultPartitionGrouper	Default implementation of the PartitionGrouper interface that groups partitions by the partition id.
FailOnInvalidTimestamp	Retrieves embedded metadata timestamps from Kafka messages.
LogAndSkipOnInvalidTimestamp	Retrieves embedded metadata timestamps from Kafka messages.
TaskId	The task ID representation composed as topic group ID plus the assigned partition ID.
TaskMetadata	Represents the state of a single task running within a KafkaStreams application.
ThreadMetadata	Represents the state of a single thread running within a KafkaStreams application.
TopologyBuilder	Deprecated. use Topology instead
TopologyBuilder.TopicsInfo	NOTE this class would not needed by developers working with the processor APIs, but only used for internal functionalities.
UsePreviousTimeOnInvalidTimestamp	Retrieves embedded metadata timestamps from Kafka messages.
WallclockTimestampExtractor	Retrieves current wall clock timestamps as System.currentTimeMillis().

Enum Summary

Enum	Description
PunctuationType	Controls what notion of time is used for punctuation scheduled via ProcessorContext.schedule(long, PunctuationType, Punctuator) schedule}: STREAM_TIME - uses "stream time", which is advanced by the processing of messages in accordance with the timestamp as extracted by the TimestampExtractor in use.
TopologyBuilder.AutoOffsetReset	Enum used to define auto offset reset policy when creating KStream or KTable.