io.ray.streaming.state.keystate.state.impl

Class OperatorStateImpl<V>

java.lang.Object

io.ray.streaming.state.keystate.state.impl.OperatorStateImpl<V>

All Implemented Interfaces:

ListState<V>, State, UnaryState<List<V>>

public class OperatorStateImpl<V>
extends Object
implements ListState<V>

This class defines the implementation of operator state. When the state is initialized, we must scan the whole table. And if the state type is splitList, all the records must be spitted.

Constructor Summary

Constructors

Constructor and Description
OperatorStateImpl(ListStateDescriptor<V> descriptor, AbstractKeyStateBackend backend)

Method Summary

Modifier and Type	Method and Description
void	add(V value) add the value to list
List<V>	get() get the value in state
protected String	getStateKey()
void	init()
void	setCurrentKey(Object currentKey) set current key of the state
void	setSplit(boolean split)
void	update(List<V> list) update list state

Methods inherited from class java.lang.Object

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

Constructor Detail

OperatorStateImpl

public OperatorStateImpl(ListStateDescriptor<V> descriptor,
                         AbstractKeyStateBackend backend)

Method Detail

init

public void init()

getStateKey

protected String getStateKey()

setCurrentKey

public void setCurrentKey(Object currentKey)

Description copied from interface: State

set current key of the state

Specified by:

setCurrentKey in interface State

get

public List<V> get()

Description copied from interface: UnaryState

get the value in state

Specified by:

get in interface UnaryState<List<V>>

Returns:

the value in state

add

public void add(V value)

Description copied from interface: ListState

add the value to list

Specified by:

add in interface ListState<V>

Parameters:

value - the new value

update

public void update(List<V> list)

Description copied from interface: ListState

update list state

Specified by:

update in interface ListState<V>

Parameters:

list - the new value

setSplit

public void setSplit(boolean split)