Package org.apache.flink.runtime.state.v2.internal

Interface InternalMergingState<K,​N,​IN,​SV,​OUT,​SYNCOUT>

  • Type Parameters:
    K - The type of key the state is associated to.
    N - The namespace type.
    IN - The type of the values that are added into the state.
    SV - The type of the intermediate state.
    OUT - The type of the values that are returned from the state.
    SYNCOUT - Type of the value that can be retrieved from the state by synchronous interface.
    All Superinterfaces:
    org.apache.flink.api.common.state.v2.AppendingState<IN,​OUT,​SYNCOUT>, InternalAppendingState<K,​N,​IN,​SV,​OUT,​SYNCOUT>, InternalKeyedState<K,​N,​SV>, InternalPartitionedState<N>, org.apache.flink.api.common.state.v2.MergingState<IN,​OUT,​SYNCOUT>, org.apache.flink.api.common.state.v2.State
    All Known Subinterfaces:
    InternalAggregatingState<K,​N,​IN,​ACC,​OUT>, InternalReducingState<K,​N,​T>
    All Known Implementing Classes:
    AbstractAggregatingState, AbstractReducingState, AggregatingStateAdaptor, MergingStateAdaptor, ReducingStateAdaptor
    public interface InternalMergingState<K,​N,​IN,​SV,​OUT,​SYNCOUT>
extends InternalAppendingState<K,​N,​IN,​SV,​OUT,​SYNCOUT>, org.apache.flink.api.common.state.v2.MergingState<IN,​OUT,​SYNCOUT>
    This class defines the internal interface for merging state.

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      org.apache.flink.api.common.state.v2.StateFuture<Void> asyncMergeNamespaces​(N target, Collection<N> sources)
      Merges the state of the current key for the given source namespaces into the state of the target namespace.
      void mergeNamespaces​(N target, Collection<N> sources)
      Merges the state of the current key for the given source namespaces into the state of the target namespace.

      • Methods inherited from interface org.apache.flink.api.common.state.v2.AppendingState

        add, asyncAdd, asyncGet, get

      • Methods inherited from interface org.apache.flink.api.common.state.v2.State

        asyncClear, clear

    • Method Detail

      • asyncMergeNamespaces

        org.apache.flink.api.common.state.v2.StateFuture<Void> asyncMergeNamespaces​(N target,
                                                                            Collection<N> sources)
        Merges the state of the current key for the given source namespaces into the state of the target namespace.
        Parameters:
        target - The target namespace where the merged state should be stored.
        sources - The source namespaces whose state should be merged.

      • mergeNamespaces

        void mergeNamespaces​(N target,
                     Collection<N> sources)
        Merges the state of the current key for the given source namespaces into the state of the target namespace.
        Parameters:
        target - The target namespace where the merged state should be stored.
        sources - The source namespaces whose state should be merged.