org.apache.flink.runtime.operators.coordination

Interface CoordinatorStore

All Known Implementing Classes:

CoordinatorStoreImpl

@ThreadSafe
 @Internal
public interface CoordinatorStore

CoordinatorStore can be used for sharing some information among OperatorCoordinator instances. Motivating example is/was combining/aggregating latest watermark emitted by different sources in order to do the watermark alignment.

Implementations of this interface must ensure that all operations are atomic.

Method Summary

Modifier and Type	Method and Description
<R> R	apply(Object key, Function<Object,R> consumer)
Object	compute(Object key, BiFunction<Object,Object,Object> mappingFunction)
Object	computeIfPresent(Object key, BiFunction<Object,Object,Object> remappingFunction)
boolean	containsKey(Object key)
Object	get(Object key)
Object	putIfAbsent(Object key, Object value)

Method Detail

containsKey

boolean containsKey(Object key)

get

Object get(Object key)

putIfAbsent

Object putIfAbsent(Object key,
                   Object value)

computeIfPresent

Object computeIfPresent(Object key,
                        BiFunction<Object,Object,Object> remappingFunction)

compute

Object compute(Object key,
               BiFunction<Object,Object,Object> mappingFunction)

apply

<R> R apply(Object key,
            Function<Object,R> consumer)