Package org.apache.flink.state.api.input

Class MultiStateKeyIterator<K>

java.lang.Object

org.apache.flink.state.api.input.MultiStateKeyIterator<K>

Type Parameters:

K - Type of the key by which state is keyed.

All Implemented Interfaces:

AutoCloseable, Iterator<K>, org.apache.flink.util.CloseableIterator<K>

@Internal
public final class MultiStateKeyIterator<K>
extends Object
implements org.apache.flink.util.CloseableIterator<K>

An iterator for reading all keys in a state backend across multiple partitioned states.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.util.CloseableIterator

org.apache.flink.util.CloseableIterator.IteratorAdapter<E extends Object>

Field Summary

Fields inherited from interface org.apache.flink.util.CloseableIterator

EMPTY_INSTANCE

Constructor Summary

Constructors

Constructor	Description
MultiStateKeyIterator(List<? extends org.apache.flink.api.common.state.StateDescriptor<?,?>> descriptors, org.apache.flink.runtime.state.KeyedStateBackend<K> backend)

Method Summary

Modifier and Type	Method	Description
void	close()
boolean	hasNext()
K	next()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Constructor Detail

MultiStateKeyIterator

public MultiStateKeyIterator(List<? extends org.apache.flink.api.common.state.StateDescriptor<?,?>> descriptors,
                             org.apache.flink.runtime.state.KeyedStateBackend<K> backend)

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<K>

next

public K next()

Specified by:

next in interface Iterator<K>

close

public void close()
           throws Exception

Specified by:

close in interface AutoCloseable

Throws:

Exception