All Classes

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().
Aggregator<K,V,VA>	The Aggregator interface for aggregating values of the given key.
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.
BrokerNotFoundException	Indicates that none of the specified brokers could be found.
Cancellable	Cancellable interface returned in ProcessorContext.schedule(long, PunctuationType, Punctuator).
Consumed<K,V>	The Consumed class is used to define the optional parameters when using StreamsBuilder to build instances of KStream, KTable, and GlobalKTable.
DefaultPartitionGrouper	Default implementation of the PartitionGrouper interface that groups partitions by the partition id.
DefaultProductionExceptionHandler	ProductionExceptionHandler that always instructs streams to fail when an exception happens while attempting to produce result records.
DeserializationExceptionHandler	Interface that specifies how an exception from source node deserialization (e.g., reading from Kafka) should be handled.
DeserializationExceptionHandler.DeserializationHandlerResponse	Enumeration that describes the response from the exception handler.
FailOnInvalidTimestamp	Retrieves embedded metadata timestamps from Kafka messages.
ForeachAction<K,V>	The ForeachAction interface for performing an action on a key-value pair.
GlobalKTable<K,V>	GlobalKTable is an abstraction of a changelog stream from a primary-keyed table.
HostInfo	Represents a user defined endpoint in a KafkaStreams application.
Initializer<VA>	The Initializer interface for creating an initial value in aggregations.
InternalStreamNotExistException
InvalidStateStoreException	Indicates that there was a problem when trying to access a StateStore, i.e, the Store is no longer valid because it is closed or doesn't exist any more due to a rebalance.
Joined<K,V,VO>	The Joined class represents optional params that can be passed to KStream.join(org.apache.kafka.streams.kstream.KStream<K, VO>, org.apache.kafka.streams.kstream.ValueJoiner<? super V, ? super VO, ? extends VR>, org.apache.kafka.streams.kstream.JoinWindows), KStream.leftJoin(org.apache.kafka.streams.kstream.KStream<K, VO>, org.apache.kafka.streams.kstream.ValueJoiner<? super V, ? super VO, ? extends VR>, org.apache.kafka.streams.kstream.JoinWindows), and KStream.outerJoin(org.apache.kafka.streams.kstream.KStream<K, VO>, org.apache.kafka.streams.kstream.ValueJoiner<? super V, ? super VO, ? extends VR>, org.apache.kafka.streams.kstream.JoinWindows) operations.
JoinWindows	The window specifications used for joins.
KafkaClientSupplier	KafkaClientSupplier can be used to provide custom Kafka clients to a KafkaStreams instance.
KafkaStreams	A Kafka client that allows for performing continuous computation on input coming from one or more input topics and sends output to zero, one, or more output topics.
KafkaStreams.State	Kafka Streams states are the possible state that a Kafka Streams instance can be in.
KafkaStreams.StateListener	Listen to KafkaStreams.State change events.
KeyValue<K,V>	A key-value pair defined for a single Kafka Streams record.
KeyValueBytesStoreSupplier	A store supplier that can be used to create one or more KeyValueStore instances of type <Byte, byte[]>.
KeyValueIterator<K,V>	Iterator interface of KeyValue.
KeyValueMapper<K,V,VR>	The KeyValueMapper interface for mapping a key-value pair to a new value of arbitrary type.
KeyValueStore<K,V>	A key-value store that supports put/get/delete and range queries.
KGroupedStream<K,V>	KGroupedStream is an abstraction of a grouped record stream of KeyValue pairs.
KGroupedTable<K,V>	KGroupedTable is an abstraction of a re-grouped changelog stream from a primary-keyed table, usually on a different grouping key than the original primary key.
KStream<K,V>	KStream is an abstraction of a record stream of KeyValue pairs, i.e., each record is an independent entity/event in the real world.
KStreamBuilder	Deprecated. Use StreamsBuilder instead
KTable<K,V>	KTable is an abstraction of a changelog stream from a primary-keyed table.
LockException	Indicates that the state store directory lock could not be acquired because another thread holds the lock.
LogAndContinueExceptionHandler	Deserialization handler that logs a deserialization exception and then signals the processing pipeline to continue processing more records.
LogAndFailExceptionHandler	Deserialization handler that logs a deserialization exception and then signals the processing pipeline to stop processing more records and fail.
LogAndSkipOnInvalidTimestamp	Retrieves embedded metadata timestamps from Kafka messages.
Materialized<K,V,S extends StateStore>	Used to describe how a StateStore should be materialized.
Merger<K,V>	The interface for merging aggregate values for SessionWindows with the given key.
PartitionGrouper	A partition grouper that generates partition groups given the list of topic-partitions.
Predicate<K,V>	The Predicate interface represents a predicate (boolean-valued function) of a KeyValue pair.
Printed<K,V>	An object to define the options used when printing a KStream.
Processor<K,V>	A processor of key-value pair records.
ProcessorContext	Processor context interface.
ProcessorStateException	Indicates a processor state operation (e.g.
ProcessorSupplier<K,V>	A processor supplier that can create one or more Processor instances.
Produced<K,V>	This class is used to provide the optional parameters when producing to new topics using KStream.through(String, Produced) or KStream.to(String, Produced).
ProductionExceptionHandler	Interface that specifies how an exception when attempting to produce a result to Kafka should be handled.
ProductionExceptionHandler.ProductionExceptionHandlerResponse
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.
Punctuator	A functional interface used as an argument to ProcessorContext.schedule(long, PunctuationType, Punctuator).
QueryableStoreType<T>	Used to enable querying of custom StateStore types via the KafkaStreams API.
QueryableStoreTypes	Provides access to the QueryableStoreTypes provided with KafkaStreams.
ReadOnlyKeyValueStore<K,V>	A key value store that only supports read operations.
ReadOnlySessionStore<K,AGG>	A session store that only supports read operations.
ReadOnlyWindowStore<K,V>	A window store that only supports read operations Implementations should be thread-safe as concurrent reads and writes are expected.
Reducer<V>	The Reducer interface for combining two values of the same type into a new value.
RocksDBConfigSetter	An interface to that allows developers to customize the RocksDB settings for a given Store.
Serialized<K,V>	The class that is used to capture the key and value Serdes used when performing KStream.groupBy(KeyValueMapper, Serialized) and KStream.groupByKey(Serialized) operations.
SessionBytesStoreSupplier	A store supplier that can be used to create one or more SessionStore instances of type <Byte, byte[]>.
SessionStore<K,AGG>	Interface for storing the aggregated values of sessions
SessionWindowedKStream<K,V>	SessionWindowedKStream is an abstraction of a windowed record stream of KeyValue pairs.
SessionWindows	A session based window specification used for aggregating events into sessions.
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.
StateSerdes<K,V>	Factory for creating serializers / deserializers for state stores in Kafka Streams.
StateStore	A storage engine for managing state maintained by a stream processor.
StateStoreSupplier<T extends StateStore>	Deprecated. use StoreSupplier
StoreBuilder<T extends StateStore>	Build a StateStore wrapped with optional caching and logging.
Stores	Factory for creating state stores in Kafka Streams.
Stores.InMemoryKeyValueFactory<K,V>	Deprecated.
Stores.KeyValueFactory<K,V>
Stores.PersistentKeyValueFactory<K,V>	Deprecated.
Stores.StoreFactory
Stores.ValueFactory<K>	The factory for creating off-heap key-value stores.
StoreSupplier<T extends StateStore>	A state store supplier which can create one or more StateStore instances.
StreamPartitioner<K,V>	Determine how records are distributed among the partitions in a Kafka topic.
StreamsBuilder	StreamsBuilder provide the high-level Kafka Streams DSL to specify a Kafka Streams topology.
StreamsConfig	Configuration for a KafkaStreams instance.
StreamsConfig.InternalConfig
StreamsException	StreamsException is the top-level exception type generated by Kafka Streams.
StreamsMetadata	Represents the state of an instance (process) in a KafkaStreams application.
StreamsMetrics	The Kafka Streams metrics interface for adding metric sensors and collecting metric values.
TaskAssignmentException	Indicates a run time error incurred while trying to assign stream tasks to threads.
TaskId	The task ID representation composed as topic group ID plus the assigned partition ID.
TaskIdFormatException	Indicates a run time error incurred while trying parse the task id from the read string.
TaskMetadata	Represents the state of a single task running within a KafkaStreams application.
TaskMigratedException	Indicates that a task got migrated to another thread.
ThreadMetadata	Represents the state of a single thread running within a KafkaStreams application.
TimestampExtractor	An interface that allows the Kafka Streams framework to extract a timestamp from an instance of ConsumerRecord.
TimeWindowedKStream<K,V>	TimeWindowedKStream is an abstraction of a windowed record stream of KeyValue pairs.
TimeWindows	The fixed-size time-based window specifications used for aggregations.
Topology	A logical representation of a ProcessorTopology.
Topology.AutoOffsetReset	Sets the auto.offset.reset configuration when adding a source processor or when creating KStream or KTable via StreamsBuilder.
TopologyBuilder	Deprecated. use Topology instead
TopologyBuilder.AutoOffsetReset	Enum used to define auto offset reset policy when creating KStream or KTable.
TopologyBuilder.TopicsInfo	NOTE this class would not needed by developers working with the processor APIs, but only used for internal functionalities.
TopologyBuilderException	Deprecated. use Topology instead of TopologyBuilder
TopologyDescription	A meta representation of a topology.
TopologyDescription.GlobalStore	Represents a global store.
TopologyDescription.Node	A node of a topology.
TopologyDescription.Processor	A processor node of a topology.
TopologyDescription.Sink	A sink node of a topology.
TopologyDescription.Source	A source node of a topology.
TopologyDescription.Subtopology	A connected sub-graph of a Topology.
TopologyException	Indicates a pre run time error occurred while parsing the logical topology to construct the physical processor topology.
Transformer<K,V,R>	The Transformer interface is for stateful mapping of an input record to zero, one, or multiple new output records (both key and value type can be altered arbitrarily).
TransformerSupplier<K,V,R>	A TransformerSupplier interface which can create one or more Transformer instances.
UnlimitedWindows	The unlimited window specifications used for aggregations.
UsePreviousTimeOnInvalidTimestamp	Retrieves embedded metadata timestamps from Kafka messages.
Utils
ValueJoiner<V1,V2,VR>	The ValueJoiner interface for joining two values into a new value of arbitrary type.
ValueMapper<V,VR>	The ValueMapper interface for mapping a value to a new value of arbitrary type.
ValueMapperWithKey<K,V,VR>	The ValueMapperWithKey interface for mapping a value to a new value of arbitrary type.
ValueTransformer<V,VR>	The ValueTransformer interface for stateful mapping of a value to a new value (with possible new type).
ValueTransformerSupplier<V,VR>	A ValueTransformerSupplier interface which can create one or more ValueTransformer instances.
ValueTransformerWithKey<K,V,VR>	The ValueTransformerWithKey interface for stateful mapping of a value to a new value (with possible new type).
ValueTransformerWithKeySupplier<K,V,VR>
WallclockTimestampExtractor	Retrieves current wall clock timestamps as System.currentTimeMillis().
Window	A single window instance, defined by its start and end timestamp.
WindowBytesStoreSupplier	A store supplier that can be used to create one or more WindowStore instances of type <Byte, byte[]>.
Windowed<K>	The result key type of a windowed stream aggregation.
Windows<W extends Window>	The window specification interface for fixed size windows that is used to define window boundaries and window maintain duration.
WindowStore<K,V>	A windowed store interface extending StateStore.
WindowStoreIterator<V>	Iterator interface of KeyValue with key typed Long used for ReadOnlyWindowStore.fetch(Object, long, long).