org.apache.flink.runtime.state

Class StateUtils

java.lang.Object

org.apache.flink.runtime.state.StateUtils

public class StateUtils
extends Object

A collection of utility methods for dealing with operator state.

Method Summary

Modifier and Type	Method and Description
static <T extends StateHandle<?>> void	setOperatorState(OperatorStateCarrier<?> op, StateHandle<?> state) Utility method to define a common generic bound to be used for setting a generic state handle on a generic state carrier.

Methods inherited from class java.lang.Object

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

Method Detail

setOperatorState

public static <T extends StateHandle<?>> void setOperatorState(OperatorStateCarrier<?> op,
                                                               StateHandle<?> state)
                                                        throws Exception

Utility method to define a common generic bound to be used for setting a generic state handle on a generic state carrier. This has no impact on runtime, since internally, it performs unchecked casts. The purpose is merely to allow the use of generic interfaces without resorting to raw types, by giving the compiler a common type bound.

Type Parameters:

T - Type bound for the

Parameters:

op - The state carrier operator.

state - The state handle.

Throws:

Exception