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org.apache.flink.runtime.state.keyed.KeyedValueStateImpl Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.flink.runtime.state.keyed;
import org.apache.flink.api.common.functions.HashPartitioner;
import org.apache.flink.api.common.typeutils.SerializationException;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.api.common.typeutils.base.StringSerializer;
import org.apache.flink.core.memory.ByteArrayOutputStreamWithPos;
import org.apache.flink.core.memory.DataOutputView;
import org.apache.flink.core.memory.DataOutputViewStreamWrapper;
import org.apache.flink.queryablestate.client.state.serialization.KvStateSerializer;
import org.apache.flink.runtime.state.AbstractInternalStateBackend;
import org.apache.flink.runtime.state.BatchPutWrapper;
import org.apache.flink.runtime.state.GroupIterator;
import org.apache.flink.runtime.state.StateAccessException;
import org.apache.flink.runtime.state.StateIteratorUtil;
import org.apache.flink.runtime.state.StateSerializerUtil;
import org.apache.flink.runtime.state.StateStorage;
import org.apache.flink.runtime.state.StateTransformationFunction;
import org.apache.flink.runtime.state.StorageInstance;
import org.apache.flink.runtime.state.StorageIterator;
import org.apache.flink.runtime.state.VoidNamespaceSerializer;
import org.apache.flink.runtime.state.heap.HeapStateStorage;
import org.apache.flink.types.Pair;
import org.apache.flink.util.Preconditions;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import static org.apache.flink.runtime.state.StateSerializerUtil.KEY_END_BYTE;
/**
* An implementation of {@link KeyedValueState} based on a {@link StateStorage}
* The pairs are formatted as {K -> V}, and are partitioned by K.
*
* @param Type of the keys in the state.
* @param Type of the values in the state.
*/
public final class KeyedValueStateImpl implements KeyedValueState {
/**
* The descriptor of this state.
*/
private final KeyedValueStateDescriptor descriptor;
/**
* The state storage where the values are stored.
*/
private final StateStorage stateStorage;
/**
* Serializer of key for current state.
*/
private TypeSerializer keySerializer;
/**
* Serializer of value for current state.
*/
private TypeSerializer valueSerializer;
/**
* Serialized bytes of current state name.
*/
private final byte[] stateNameByte;
private final byte[] stateNameForSerializer;
/**
* State backend who creates current state.
*/
private AbstractInternalStateBackend internalStateBackend;
/** partitioner used to generate key group. */
private static final HashPartitioner partitioner = HashPartitioner.INSTANCE;
private ByteArrayOutputStreamWithPos outputStream = new ByteArrayOutputStreamWithPos();
private DataOutputView outputView = new DataOutputViewStreamWrapper(outputStream);
/**
* Constructor with the state storage to store the values.
*
* @param internalStateBackend The state backend who creates the current state.
* @param descriptor The descriptor of this state.
* @param stateStorage The state storage where the values are stored.
*/
public KeyedValueStateImpl(
AbstractInternalStateBackend internalStateBackend,
KeyedValueStateDescriptor descriptor,
StateStorage stateStorage
) {
this.descriptor = Preconditions.checkNotNull(descriptor);
this.stateStorage = Preconditions.checkNotNull(stateStorage);
this.internalStateBackend = Preconditions.checkNotNull(internalStateBackend);
this.keySerializer = descriptor.getKeySerializer();
this.valueSerializer = descriptor.getValueSerializer();
ByteArrayOutputStream out = new ByteArrayOutputStream();
try {
StringSerializer.INSTANCE.serialize(descriptor.getName(), new DataOutputViewStreamWrapper(out));
stateNameByte = out.toByteArray();
} catch (IOException e) {
throw new SerializationException(e);
}
this.stateNameForSerializer = stateStorage.supportMultiColumnFamilies() ? null : stateNameByte;
}
@Override
public KeyedValueStateDescriptor getDescriptor() {
return descriptor;
}
//--------------------------------------------------------------------------
@Override
public boolean contains(K key) {
if (key == null) {
return false;
}
try {
if (stateStorage.lazySerde()) {
return stateStorage.get(key) != null;
} else {
outputStream.reset();
byte[] serializedKey = StateSerializerUtil.getSerializedKeyForKeyedValueState(
outputStream,
outputView,
key,
keySerializer,
getKeyGroup(key),
stateNameForSerializer);
return stateStorage.get(serializedKey) != null;
}
} catch (Exception e) {
throw new StateAccessException(e);
}
}
@Override
public V get(K key) {
return getOrDefault(key, null);
}
@Override
public V getOrDefault(K key, V defaultValue) {
if (key == null) {
return defaultValue;
}
try {
if (stateStorage.lazySerde()) {
V value = (V) stateStorage.get(key);
return value == null ? defaultValue : value;
} else {
byte[] serializedValue = getSerializedValue(key, outputStream, outputView, keySerializer);
if (serializedValue == null) {
return defaultValue;
} else {
return StateSerializerUtil.getDeserializeSingleValue(serializedValue, valueSerializer);
}
}
} catch (Exception e) {
throw new StateAccessException(e);
}
}
@Override
public Map getAll(Collection keys) {
if (keys == null || keys.isEmpty()) {
return Collections.emptyMap();
}
try {
Map results = new HashMap<>();
if (stateStorage.lazySerde()) {
for (K key : keys) {
if (key == null) {
continue;
}
V value = (V) stateStorage.get(key);
if (value != null) {
results.put(key, value);
}
}
} else {
for (K key : keys) {
if (key == null) {
continue;
}
outputStream.reset();
byte[] serializedKey = StateSerializerUtil.getSerializedKeyForKeyedValueState(
outputStream,
outputView,
key,
keySerializer,
getKeyGroup(key),
stateNameForSerializer);
byte[] serializedValue = (byte[]) stateStorage.get(serializedKey);
if (serializedValue != null) {
results.put(key, StateSerializerUtil.getDeserializeSingleValue(serializedValue, valueSerializer));
}
}
}
return results;
} catch (Exception e) {
throw new StateAccessException(e);
}
}
@Override
public void remove(K key) {
if (key == null) {
return;
}
try {
if (stateStorage.lazySerde()) {
stateStorage.remove(key);
} else {
outputStream.reset();
byte[] serializedKey = StateSerializerUtil.getSerializedKeyForKeyedValueState(
outputStream,
outputView,
key,
keySerializer,
getKeyGroup(key),
stateNameForSerializer);
stateStorage.remove(serializedKey);
}
} catch (Exception e) {
throw new StateAccessException(e);
}
}
@Override
public void removeAll(Collection keys) {
if (keys == null || keys.isEmpty()) {
return;
}
for (K key : keys) {
remove(key);
}
}
@Override
public void put(K key, V value) {
Preconditions.checkNotNull(key);
try {
if (stateStorage.lazySerde()) {
stateStorage.put(key, value);
} else {
outputStream.reset();
byte[] serializedKey = StateSerializerUtil.getSerializedKeyForKeyedValueState(
outputStream,
outputView,
key,
keySerializer,
getKeyGroup(key),
stateNameForSerializer);
outputStream.reset();
byte[] serializedValue = StateSerializerUtil.getSerializeSingleValue(outputStream, outputView, value, valueSerializer);
stateStorage.put(serializedKey, serializedValue);
}
} catch (Exception e) {
throw new StateAccessException(e);
}
}
@Override
public void putAll(Map pairs) {
if (pairs == null || pairs.isEmpty()) {
return;
}
try {
if (stateStorage.lazySerde()) {
for (Map.Entry entry : pairs.entrySet()) {
stateStorage.put(entry.getKey(), entry.getValue());
}
} else {
StorageInstance instance = stateStorage.getStorageInstance();
try (BatchPutWrapper batchPutWrapper = instance.getBatchPutWrapper()) {
for (Map.Entry entry : pairs.entrySet()) {
K key = entry.getKey();
outputStream.reset();
byte[] byteKey = StateSerializerUtil.getSerializedKeyForKeyedValueState(
outputStream,
outputView,
key,
keySerializer,
getKeyGroup(key),
stateNameForSerializer);
outputStream.reset();
byte[] byteValue = StateSerializerUtil.getSerializeSingleValue(
outputStream,
outputView,
entry.getValue(),
valueSerializer);
batchPutWrapper.put(byteKey, byteValue);
}
}
}
} catch (Exception e) {
throw new StateAccessException(e);
}
}
@Override
public Map getAll() {
try {
Map results = new HashMap<>();
if (stateStorage.lazySerde()) {
Iterator> iterator = stateStorage.iterator();
while (iterator.hasNext()) {
Pair pair = iterator.next();
results.put(pair.getKey(), pair.getValue());
}
} else {
if (!stateStorage.supportMultiColumnFamilies() && internalStateBackend.getStateStorages().size() > 1) {
for (Integer group : internalStateBackend.getKeyGroupRange()) {
outputStream.reset();
StateSerializerUtil.serializeGroupPrefix(outputStream, group, stateNameByte);
byte[] groupPrefix = outputStream.toByteArray();
outputStream.write(KEY_END_BYTE);
byte[] groupPrefixEnd = outputStream.toByteArray();
StorageIterator iterator = (StorageIterator) stateStorage.subIterator(groupPrefix, groupPrefixEnd);
while (iterator.hasNext()) {
Pair bytePair = iterator.next();
K key = StateSerializerUtil.getDeserializedKeyForKeyedValueState(
bytePair.getKey(),
keySerializer,
stateNameByte.length);
V value = StateSerializerUtil.getDeserializeSingleValue(bytePair.getValue(), valueSerializer);
results.put(key, value);
}
}
} else {
StorageIterator iterator = (StorageIterator) stateStorage.iterator();
while (iterator.hasNext()) {
Pair bytePair = iterator.next();
K key = StateSerializerUtil.getDeserializedKeyForKeyedValueState(
bytePair.getKey(),
keySerializer,
stateStorage.supportMultiColumnFamilies() ? 0 : stateNameByte.length);
V value = StateSerializerUtil.getDeserializeSingleValue(bytePair.getValue(), valueSerializer);
results.put(key, value);
}
}
}
return results;
} catch (Exception e) {
throw new StateAccessException(e);
}
}
@Override
public void removeAll() {
if (stateStorage.lazySerde()) {
((HeapStateStorage) stateStorage).removeAll();
} else {
try {
if (!stateStorage.supportMultiColumnFamilies() && internalStateBackend.getStateStorages().size() > 1) {
for (Integer group : internalStateBackend.getKeyGroupRange()) {
outputStream.reset();
StateSerializerUtil.serializeGroupPrefix(outputStream, group, stateNameByte);
byte[] groupPrefix = outputStream.toByteArray();
outputStream.write(KEY_END_BYTE);
byte[] groupPrefixEnd = outputStream.toByteArray();
StorageIterator iterator = stateStorage.subIterator(groupPrefix, groupPrefixEnd);
while (iterator.hasNext()) {
iterator.next();
iterator.remove();
}
}
} else {
StorageIterator iterator = stateStorage.iterator();
while (iterator.hasNext()) {
iterator.next();
iterator.remove();
}
}
} catch (Exception e) {
throw new StateAccessException(e);
}
}
}
@Override
public Iterable keys() {
return new Iterable() {
@Override
public Iterator iterator() {
try {
if (stateStorage.lazySerde()) {
Iterator> iterator = stateStorage.iterator();
return new Iterator() {
@Override
public boolean hasNext() {
return iterator.hasNext();
}
@Override
public K next() {
return iterator.next().getKey();
}
@Override
public void remove() {
iterator.remove();
}
};
} else {
if (!stateStorage.supportMultiColumnFamilies() && internalStateBackend.getStateStorages().size() > 1) {
Collection>> groupIterators = new ArrayList<>();
for (Integer group : internalStateBackend.getKeyGroupRange()) {
outputStream.reset();
StateSerializerUtil.serializeGroupPrefix(outputStream, group, stateNameByte);
byte[] groupPrefix = outputStream.toByteArray();
outputStream.write(KEY_END_BYTE);
byte[] groupPrefixEnd = outputStream.toByteArray();
StorageIterator iterator = stateStorage.subIterator(groupPrefix, groupPrefixEnd);
groupIterators.add(iterator);
}
GroupIterator groupIterator = new GroupIterator(groupIterators);
return StateIteratorUtil.createKeyIterator(groupIterator, keySerializer, stateNameByte.length);
} else {
StorageIterator iterator = stateStorage.iterator();
return StateIteratorUtil.createKeyIterator(iterator, keySerializer, stateStorage.supportMultiColumnFamilies() ? 0 : stateNameByte.length);
}
}
} catch (Exception e) {
throw new StateAccessException(e);
}
}
};
}
@Override
public void transform(K key, T value, StateTransformationFunction transformation) {
try {
if (stateStorage.lazySerde()) {
((HeapStateStorage) stateStorage).transform(key, value, transformation);
} else {
outputStream.reset();
byte[] serializedKey = StateSerializerUtil.getSerializedKeyForKeyedValueState(
outputStream,
outputView,
key,
keySerializer,
getKeyGroup(key),
stateNameForSerializer);
byte[] serializedValue = (byte[]) stateStorage.get(serializedKey);
V oldValue = serializedValue == null ? null :
StateSerializerUtil.getDeserializeSingleValue(serializedValue, valueSerializer);
V newValue = transformation.apply(oldValue, value);
outputStream.reset();
valueSerializer.serialize(newValue, outputView);
stateStorage.put(serializedKey, outputStream.toByteArray());
}
} catch (Exception e) {
throw new StateAccessException(e);
}
}
@Override
public byte[] getSerializedValue(
final byte[] serializedKeyAndNamespace,
final TypeSerializer safeKeySerializer,
final TypeSerializer safeValueSerializer) throws Exception {
K key = KvStateSerializer.deserializeKeyAndNamespace(serializedKeyAndNamespace, safeKeySerializer, VoidNamespaceSerializer.INSTANCE).f0;
if (stateStorage.lazySerde()) {
V value = get(key);
if (value == null) {
return null;
}
return KvStateSerializer.serializeValue(value, safeValueSerializer);
} else {
ByteArrayOutputStreamWithPos baos = new ByteArrayOutputStreamWithPos();
DataOutputViewStreamWrapper view = new DataOutputViewStreamWrapper(baos);
return getSerializedValue(key, baos, view, safeKeySerializer);
}
}
@Override
public StateStorage getStateStorage() {
return stateStorage;
}
private int getKeyGroup(K key) {
return partitioner.partition(key, internalStateBackend.getNumGroups());
}
private byte[] getSerializedValue(
K key,
ByteArrayOutputStreamWithPos outputStream,
DataOutputView outputView,
TypeSerializer keySerializer) throws Exception {
outputStream.reset();
byte[] serializedKey = StateSerializerUtil.getSerializedKeyForKeyedValueState(
outputStream,
outputView,
key,
keySerializer,
getKeyGroup(key),
stateNameForSerializer);
return (byte[]) stateStorage.get(serializedKey);
}
}
