Package org.apache.beam.fn.harness.state

State client and state caching.

Interface Summary

Interface	Description
BeamFnStateClient	The BeamFnStateClient is able to forward state requests to a handler which returns a corresponding response or error if completed unsuccessfully.
FnApiStateAccessor.MutatingStateContext<K,W>
StateBackedIterable.StateBackedIterableTranslationContext	Additional parameters required by the StateBackedIterable.Coder.

Class Summary

Class	Description
BagUserState<T>	An implementation of a bag user state that utilizes the Beam Fn State API to fetch, clear and persist values.
BeamFnStateGrpcClientCache	A cache of BeamFnStateClients which handle Beam Fn State requests using gRPC.
FnApiStateAccessor<K>	Provides access to side inputs and state via a BeamFnStateClient.
FnApiStateAccessor.Factory<K>	A factory that takes all the immutable parameters to create a FnApiStateAccessor.
FnApiTimerBundleTracker<K>
FnApiTimerBundleTracker.Modifications<K>
FnApiTimerBundleTracker.TimerInfo<K>
IterableSideInput<T>	An implementation of a iterable side input that utilizes the Beam Fn State API to fetch values.
MultimapSideInput<K,V>	An implementation of a multimap side input that utilizes the Beam Fn State API to fetch values.
MultimapUserState<K,V>	An implementation of a multimap user state that utilizes the Beam Fn State API to fetch, clear and persist values.
OrderedListUserState<T>	An implementation of an ordered list user state that utilizes the Beam Fn State API to fetch, clear and persist values.
OrderedListUserState.TimestampedValueCoder<T>
SideInputSpec<W extends org.apache.beam.sdk.transforms.windowing.BoundedWindow>	A specification for side inputs containing the access pattern, a value Coder, the window Coder, the ViewFn, and the WindowMappingFn.
StateBackedIterable<T>	A state backed iterable which allows for fetching elements over the portability state API.
StateBackedIterable.Coder<T>	Decodes an Iterable that might be backed by state.
StateBackedIterable.Registrar	A CoderTranslatorRegistrar for beam:coder:state_backed_iterable:v1.
StateFetchingIterators	Adapters which convert a logical series of chunks using continuation tokens over the Beam Fn State API into an Iterator of ByteStrings.