程序包 org.apache.pulsar.functions.api.state

接口 CounterStateStore

所有超级接口:

AutoCloseable, StateStore

public interface CounterStateStore
extends StateStore

The state store supports counters.

方法概要

修饰符和类型	方法	说明
long	getCounter(String key)	Retrieve the counter value for the key.
CompletableFuture<Long>	getCounterAsync(String key)	Retrieve the counter value for the key, but don't wait for the operation to be completed.
void	incrCounter(String key, long amount)	Increment the builtin distributed counter referred by key.
CompletableFuture<Void>	incrCounterAsync(String key, long amount)	Increment the builtin distributed counter referred by key but dont wait for the completion of the increment operation.

从接口继承的方法 org.apache.pulsar.functions.api.StateStore

close, fqsn, init, name, namespace, tenant

方法详细资料

incrCounter

void incrCounter(String key,
 long amount)

Increment the builtin distributed counter referred by key.

参数:

key - The name of the key

amount - The amount to be incremented

incrCounterAsync

CompletableFuture<Void> incrCounterAsync(String key,
 long amount)

Increment the builtin distributed counter referred by key but dont wait for the completion of the increment operation.

参数:

key - The name of the key

amount - The amount to be incremented

getCounter

long getCounter(String key)

Retrieve the counter value for the key.

参数:

key - name of the key

返回:

the amount of the counter value for this key

getCounterAsync

CompletableFuture<Long> getCounterAsync(String key)

Retrieve the counter value for the key, but don't wait for the operation to be completed.

参数:

key - name of the key

返回:

the amount of the counter value for this key