Package org.apache.kafka.streams.state.internals

Class CompositeReadOnlySessionStore<K,V>

java.lang.Object

org.apache.kafka.streams.state.internals.CompositeReadOnlySessionStore<K,V>

All Implemented Interfaces:

ReadOnlySessionStore<K,V>

public class CompositeReadOnlySessionStore<K,V>
extends Object
implements ReadOnlySessionStore<K,V>

Wrapper over the underlying ReadOnlySessionStores found in a ProcessorTopology

Constructor Summary

Constructors

Constructor	Description
CompositeReadOnlySessionStore(StateStoreProvider storeProvider, QueryableStoreType<ReadOnlySessionStore<K,V>> queryableStoreType, String storeName)

Method Summary

Modifier and Type	Method	Description
KeyValueIterator<Windowed<K>,V>	fetch(K key)	Retrieve all aggregated sessions for the provided key.
KeyValueIterator<Windowed<K>,V>	fetch(K from, K to)	Retrieve all aggregated sessions for the given range of keys.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CompositeReadOnlySessionStore

public CompositeReadOnlySessionStore(StateStoreProvider storeProvider,
                                     QueryableStoreType<ReadOnlySessionStore<K,V>> queryableStoreType,
                                     String storeName)

Method Detail

fetch

public KeyValueIterator<Windowed<K>,V> fetch(K key)

Description copied from interface: ReadOnlySessionStore

Retrieve all aggregated sessions for the provided key. This iterator must be closed after use. For each key, the iterator guarantees ordering of sessions, starting from the oldest/earliest available session to the newest/latest session.

Specified by:

fetch in interface ReadOnlySessionStore<K,V>

Parameters:

key - record key to find aggregated session values for

Returns:

KeyValueIterator containing all sessions for the provided key.

fetch

public KeyValueIterator<Windowed<K>,V> fetch(K from,
                                                   K to)

Description copied from interface: ReadOnlySessionStore

Retrieve all aggregated sessions for the given range of keys. This iterator must be closed after use. For each key, the iterator guarantees ordering of sessions, starting from the oldest/earliest available session to the newest/latest session.

Specified by:

fetch in interface ReadOnlySessionStore<K,V>

Parameters:

from - first key in the range to find aggregated session values for

to - last key in the range to find aggregated session values for

Returns:

KeyValueIterator containing all sessions for the provided key.