org.apache.kafka.streams

Class StoreQueryParameters<T>

java.lang.Object

org.apache.kafka.streams.StoreQueryParameters<T>

public class StoreQueryParameters<T>
extends Object

StoreQueryParameters allows you to pass a variety of parameters when fetching a store for interactive query.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	StoreQueryParameters(String storeName, QueryableStoreType<T> queryableStoreType, Integer partition, boolean staleStores)

Method Summary

Modifier and Type	Method and Description
StoreQueryParameters<T>	enableStaleStores() Enable querying of stale state stores, i.e., allow to query active tasks during restore as well as standby tasks.
boolean	equals(Object obj)
static <T> StoreQueryParameters<T>	fromNameAndType(String storeName, QueryableStoreType<T> queryableStoreType)
int	hashCode()
Integer	partition() Get the store partition that will be queried.
QueryableStoreType<T>	queryableStoreType() Get the queryable store type for which key is queried by the user.
boolean	staleStoresEnabled() Get the flag staleStores.
String	storeName() Get the name of the state store that should be queried.
String	toString()
StoreQueryParameters<T>	withPartition(Integer partition) Set a specific partition that should be queried exclusively.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

StoreQueryParameters

protected StoreQueryParameters(String storeName,
                               QueryableStoreType<T> queryableStoreType,
                               Integer partition,
                               boolean staleStores)

Method Detail

fromNameAndType

public static <T> StoreQueryParameters<T> fromNameAndType(String storeName,
                                                          QueryableStoreType<T> queryableStoreType)

withPartition

public StoreQueryParameters<T> withPartition(Integer partition)

Set a specific partition that should be queried exclusively.

Parameters:

partition - The specific integer partition to be fetched from the stores list by using StoreQueryParameters.

Returns:

StoreQueryParameters a new StoreQueryParameters instance configured with the specified partition

enableStaleStores

public StoreQueryParameters<T> enableStaleStores()

Enable querying of stale state stores, i.e., allow to query active tasks during restore as well as standby tasks.

Returns:

StoreQueryParameters a new StoreQueryParameters instance configured with serving from stale stores enabled

storeName

public String storeName()

Get the name of the state store that should be queried.

Returns:

String state store name

queryableStoreType

public QueryableStoreType<T> queryableStoreType()

Get the queryable store type for which key is queried by the user.

Returns:

QueryableStoreType type of queryable store

partition

public Integer partition()

Get the store partition that will be queried. If the method returns null, it would mean that no specific partition has been requested, so all the local partitions for the store will be queried.

Returns:

Integer partition

staleStoresEnabled

public boolean staleStoresEnabled()

Get the flag staleStores. If true, include standbys and recovering stores along with running stores.

Returns:

boolean staleStores

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object