org.apache.kafka.streams.state

Interface WindowStore<K,V>

Type Parameters:

K - Type of keys

V - Type of values

All Superinterfaces:

ReadOnlyWindowStore<K,V>, StateStore

public interface WindowStore<K,V>
extends StateStore, ReadOnlyWindowStore<K,V>

A windowed store interface extending StateStore.

Method Summary

Modifier and Type	Method and Description
void	put(K key, V value) Put a key-value pair with the current wall-clock time as the timestamp into the corresponding window
void	put(K key, V value, long timestamp) Put a key-value pair with the given timestamp into the corresponding window

Methods inherited from interface org.apache.kafka.streams.processor.StateStore

close, flush, init, isOpen, name, persistent

Methods inherited from interface org.apache.kafka.streams.state.ReadOnlyWindowStore

all, fetch, fetch, fetch, fetchAll

Method Detail

put

void put(K key,
         V value)

Put a key-value pair with the current wall-clock time as the timestamp into the corresponding window

Parameters:

key - The key to associate the value to

value - The value to update, it can be null; if the serialized bytes are also null it is interpreted as deletes

Throws:

java.lang.NullPointerException - If null is used for key.

put

void put(K key,
         V value,
         long timestamp)

Put a key-value pair with the given timestamp into the corresponding window

Parameters:

key - The key to associate the value to

value - The value; can be null

Throws:

java.lang.NullPointerException - If null is used for key.