Package org.apache.flink.state.changelog.restore

Class FunctionDelegationHelper

java.lang.Object

org.apache.flink.state.changelog.restore.FunctionDelegationHelper

@Internal
public class FunctionDelegationHelper
extends Object

Delegating functions are used to create metadata on recovery when the actual function code is not known yet. Once the actual function is known, backend updates the delegate which starts receiving the calls.

Constructor Summary

Constructors

Constructor	Description
FunctionDelegationHelper()

Method Summary

Modifier and Type	Method	Description
<T, S extends org.apache.flink.api.common.state.State, F> void	addOrUpdate(org.apache.flink.api.common.state.StateDescriptor<S,T> stateDescriptor)
static <IN, ACC, OUT> org.apache.flink.api.common.functions.AggregateFunction<IN,ACC,OUT>	delegateAggregateFunction()
static <T> org.apache.flink.api.common.functions.ReduceFunction<T>	delegateReduceFunction()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FunctionDelegationHelper

public FunctionDelegationHelper()

Method Details

delegateReduceFunction

public static <T>
org.apache.flink.api.common.functions.ReduceFunction<T> delegateReduceFunction()

delegateAggregateFunction

public static <IN,
ACC,
OUT>
org.apache.flink.api.common.functions.AggregateFunction<IN,ACC,OUT> delegateAggregateFunction()

addOrUpdate

public <T,
S extends org.apache.flink.api.common.state.State,
F>
void addOrUpdate(org.apache.flink.api.common.state.StateDescriptor<S,T> stateDescriptor)