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org.apache.flink.runtime.state.gemini.keyed.AbstractGeminiKeyedMapStateImpl 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.gemini.keyed;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.runtime.state.StateStorage;
import org.apache.flink.runtime.state.gemini.engine.GRegion;
import org.apache.flink.runtime.state.gemini.engine.hashtable.AbstractGRegionKMapImpl;
import org.apache.flink.runtime.state.gemini.engine.hashtable.AbstractGTableKeyedMapImpl;
import org.apache.flink.runtime.state.gemini.engine.hashtable.GRegionKMapImpl;
import org.apache.flink.runtime.state.gemini.engine.metrics.StateMetrics;
import org.apache.flink.runtime.state.keyed.AbstractKeyedMapState;
import org.apache.flink.runtime.state.keyed.KeyedMapState;
import org.apache.flink.util.Preconditions;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* An implementation of {@link KeyedMapState} backed by a state storage.
*
* @param Type of the keys in the state.
* @param Type of the map keys in the state.
* @param Type of theGemini map values in the state.
*/
public abstract class AbstractGeminiKeyedMapStateImpl>
implements AbstractKeyedMapState {
private final AbstractGTableKeyedMapImpl table;
private final StateMetrics metrics;
/**
* Constructor with the state storage to store mappings.
*/
public AbstractGeminiKeyedMapStateImpl(
AbstractGTableKeyedMapImpl table,
StateMetrics metrics
) {
this.table = Preconditions.checkNotNull(table);
this.metrics = metrics;
}
//--------------------------------------------------------------------------
@Override
public boolean contains(K key) {
if (key == null) {
return false;
}
return getRegion(key).contains(key);
}
@Override
public boolean contains(K key, MK mapKey) {
if (key == null || mapKey == null) {
return false;
}
return getRegion(key).contains(key, mapKey);
}
@Override
public M get(K key) {
return getOrDefault(key, null);
}
@SuppressWarnings("unchecked")
@Override
public M getOrDefault(K key, M defaultValue) {
if (key == null) {
return defaultValue;
}
if (metrics.checkAndUpdateKMapGetCounter()) {
return getOrDefaultWithMetrics(key, defaultValue);
} else {
return doGetOrDefault(key, defaultValue);
}
}
private M doGetOrDefault(K key, M defaultValue) {
if (key == null) {
return defaultValue;
}
Map result = getRegion(key).getOrDefault(key, null);
return result == null ? defaultValue : (M) result;
}
private M getOrDefaultWithMetrics(K key, M defaultValue) {
long start = System.nanoTime();
M value = doGetOrDefault(key, defaultValue);
long end = System.nanoTime();
metrics.updateKMapGetHistogram(end - start);
if (value != defaultValue && value != null) {
metrics.updateKMapGetMapSizeHistogram(value.size());
}
return value;
}
@Override
public MV get(K key, MK mapKey) {
return getOrDefault(key, mapKey, null);
}
@SuppressWarnings("unchecked")
@Override
public MV getOrDefault(K key, MK mapKey, MV defaultMapValue) {
if (key == null || mapKey == null) {
return defaultMapValue;
}
if (metrics.checkAndUpdateKMapGetMkCounter()) {
return getOrDefaultWithMetrics(key, mapKey, defaultMapValue);
} else {
return getRegion(key).getOrDefault(key, mapKey, defaultMapValue);
}
}
private MV doGetOrDefault(K key, MK mapKey, MV defaultMapValue) {
if (key == null || mapKey == null) {
return defaultMapValue;
}
return getRegion(key).getOrDefault(key, mapKey, defaultMapValue);
}
private MV getOrDefaultWithMetrics(K key, MK mapKey, MV defaultMapValue) {
long start = System.nanoTime();
MV value = doGetOrDefault(key, mapKey, defaultMapValue);
long end = System.nanoTime();
metrics.updateKMapGetMkHistogram(end - start);
return value;
}
@Override
public Map getAll(Collection keys) {
if (keys == null || keys.isEmpty()) {
return new HashMap<>();
}
if (metrics.checkAndUpdateKMapMultiGetCounter()) {
return getAllWithMetrics(keys);
} else {
return doGetAll(keys);
}
}
private Map doGetAll(Collection keys) {
Map results = new HashMap<>();
for (K key : keys) {
if (key == null) {
continue;
}
M result = doGetOrDefault(key, null);
if (result != null && !result.isEmpty()) {
results.put(key, result);
}
}
return results;
}
private Map getAllWithMetrics(Collection keys) {
long start = System.nanoTime();
Map value = doGetAll(keys);
long end = System.nanoTime();
metrics.updateKMapMultiGetHistogram(end - start);
for (M o : value.values()) {
if (o != null) {
metrics.updateKMapGetMapSizeHistogram(o.size());
// only select one map to update
break;
}
}
return value;
}
@SuppressWarnings("unchecked")
@Override
public M getAll(K key, Collection mapKeys) {
if (key == null || mapKeys == null || mapKeys.isEmpty()) {
return createMap();
}
if (metrics.checkAndUpdateKMapMultiGetCounter()) {
return getAllWithMetrics(key, mapKeys);
} else {
return doGetAll(key, mapKeys);
}
}
private M doGetAll(K key, Collection mapKeys) {
if (key == null || mapKeys == null || mapKeys.isEmpty()) {
return createMap();
}
// TODO performance
M results = createMap();
for (MK mapKey : mapKeys) {
if (mapKey != null) {
MV value = doGetOrDefault(key, mapKey, null);
if (value != null) {
results.put(mapKey, value);
}
}
}
return results;
}
private M getAllWithMetrics(K key, Collection mapKeys) {
long start = System.nanoTime();
M value = doGetAll(key, mapKeys);
long end = System.nanoTime();
metrics.updateKMapMultiGetHistogram(end - start);
return value;
}
@SuppressWarnings("unchecked")
@Override
public Map getAll(Map> map) {
if (map == null || map.isEmpty()) {
return Collections.emptyMap();
}
if (metrics.checkAndUpdateKMapMultiGetCounter()) {
return getAllWithMetrics(map);
} else {
return doGetAll(map);
}
}
private Map doGetAll(Map> map) {
Map results = new HashMap<>();
for (Map.Entry> entry : map.entrySet()) {
K key = entry.getKey();
Collection mapKeys = entry.getValue();
M resultMap = doGetAll(key, mapKeys);
if (!resultMap.isEmpty()) {
results.put(key, doGetAll(key, mapKeys));
}
}
return results;
}
private Map getAllWithMetrics(Map> map) {
long start = System.nanoTime();
Map value = doGetAll(map);
long end = System.nanoTime();
metrics.updateKMapMultiGetHistogram(end - start);
return value;
}
@Override
public void add(K key, MK mapKey, MV mapValue) {
Preconditions.checkNotNull(key);
if (metrics.checkAndUpdateKMapPutCounter()) {
addWithMetrics(key, mapKey, mapValue);
} else {
getRegion(key).add(key, mapKey, mapValue);
}
}
private void addWithMetrics(K key, MK mapKey, MV mapValue) {
long start = System.nanoTime();
getRegion(key).add(key, mapKey, mapValue);
long end = System.nanoTime();
metrics.updateKMapPutHistogram(end - start);
}
@Override
public void addAll(K key, Map mappings) {
Preconditions.checkNotNull(key);
if (mappings == null || mappings.isEmpty()) {
return;
}
if (metrics.checkAndUpdateKMapMultiPutCounter()) {
addAllWithMetrics(key, mappings);
} else {
doAddAll(key, mappings);
}
}
private void doAddAll(K key, Map mappings) {
Preconditions.checkNotNull(key);
if (mappings == null || mappings.isEmpty()) {
return;
}
getRegion(key).addAll(key, mappings);
}
private void addAllWithMetrics(K key, Map mappings) {
long start = System.nanoTime();
getRegion(key).addAll(key, mappings);
long end = System.nanoTime();
metrics.updateKMapMultiPutHistogram(end - start);
}
@Override
public void addAll(Map> map) {
if (map == null || map.isEmpty()) {
return;
}
if (metrics.checkAndUpdateKMapMultiPutCounter()) {
addAllWithMetrics(map);
} else {
for (Map.Entry entry : map.entrySet()) {
doAddAll((K) entry.getKey(), (Map) entry.getValue());
}
}
}
private void addAllWithMetrics(Map> map) {
long start = System.nanoTime();
for (Map.Entry entry : map.entrySet()) {
doAddAll((K) entry.getKey(), (Map) entry.getValue());
}
long end = System.nanoTime();
metrics.updateKMapMultiPutHistogram(end - start);
}
@Override
public void remove(K key) {
if (key == null) {
return;
}
if (metrics.checkAndUpdateKMapRemoveCounter()) {
removeWithMetrics(key);
} else {
getRegion(key).remove(key);
}
}
private void removeWithMetrics(K key) {
long start = System.nanoTime();
getRegion(key).remove(key);
long end = System.nanoTime();
metrics.updateKMapRemoveHistogram(end - start);
}
@Override
public void remove(K key, MK mapKey) {
if (key == null) {
return;
}
if (metrics.checkAndUpdateKMapRemoveCounter()) {
removeWithMetrics(key, mapKey);
} else {
getRegion(key).remove(key, mapKey);
}
}
private void removeWithMetrics(K key, MK mapKey) {
long start = System.nanoTime();
getRegion(key).remove(key, mapKey);
long end = System.nanoTime();
metrics.updateKMapRemoveHistogram(end - start);
}
@Override
public void removeAll(Collection keys) {
if (keys == null || keys.isEmpty()) {
return;
}
if (metrics.checkAndUpdateKMapMultiRemoveCounter()) {
removeAllWithMetrics(keys);
} else {
for (K key : keys) {
if (key != null) {
getRegion(key).remove(key);
}
}
}
}
private void removeAllWithMetrics(Collection keys) {
long start = System.nanoTime();
for (K key : keys) {
if (key != null) {
getRegion(key).remove(key);
}
}
long end = System.nanoTime();
metrics.updateKMapMultiRemoveHistogram(end - start);
}
@Override
public void removeAll(K key, Collection mapKeys) {
if (key == null || mapKeys == null || mapKeys.isEmpty()) {
return;
}
if (metrics.checkAndUpdateKMapMultiRemoveCounter()) {
removeAllWithMetrics(key, mapKeys);
} else {
doRemoveAll(key, mapKeys);
}
}
private void doRemoveAll(K key, Collection mapKeys) {
if (key == null || mapKeys == null || mapKeys.isEmpty()) {
return;
}
// TODO performance
for (MK mapKey : mapKeys) {
if (mapKey != null) {
getRegion(key).remove(key, mapKey);
}
}
}
private void removeAllWithMetrics(K key, Collection mapKeys) {
long start = System.nanoTime();
// TODO performance
doRemoveAll(key, mapKeys);
long end = System.nanoTime();
metrics.updateKMapMultiRemoveHistogram(end - start);
}
@Override
public void removeAll(Map> map) {
if (map == null || map.isEmpty()) {
return;
}
if (metrics.checkAndUpdateKMapMultiRemoveCounter()) {
removeAllWithMetrics(map);
} else {
for (Map.Entry> entry : map.entrySet()) {
doRemoveAll(entry.getKey(), entry.getValue());
}
}
}
private void removeAllWithMetrics(Map> map) {
long start = System.nanoTime();
for (Map.Entry> entry : map.entrySet()) {
doRemoveAll(entry.getKey(), entry.getValue());
}
long end = System.nanoTime();
metrics.updateKMapMultiRemoveHistogram(end - start);
}
@Override
public Iterator> iterator(K key) {
Preconditions.checkNotNull(key);
if (metrics.checkAndUpdateKMapIteratorCounter()) {
return iteratorWithMetrics(key);
} else {
return doIterator(key).f0;
}
}
private Tuple2>, Integer> doIterator(K key) {
// TODO performance
Map res = getRegion(key).get(key);
if (res == null) {
return Tuple2.of(Collections.emptyIterator(), -1);
} else {
return Tuple2.of(new IteratorWrapper(key, res.entrySet().iterator()), res.size());
}
}
private Iterator> iteratorWithMetrics(K key) {
long start = System.nanoTime();
Tuple2>, Integer> result = doIterator(key);
long end = System.nanoTime();
metrics.updateKMapIteratorHistogram(end - start);
if (result.f1 >= 0) {
metrics.updateKMapGetMapSizeHistogram(result.f1);
}
return result.f0;
}
@Override
public Iterable> entries(K key) {
Preconditions.checkNotNull(key);
// TODO performance
return () -> iterator(key);
}
@Override
public Iterable mapKeys(K key) {
Preconditions.checkNotNull(key);
// TODO there is no need to deserialize map value
return () -> new Iterator() {
Iterator> iterator = iterator(key);
@Override
public boolean hasNext() {
return iterator.hasNext();
}
@Override
public MK next() {
return iterator.next().getKey();
}
@Override
public void remove() {
iterator.remove();
}
};
}
@Override
public Iterable mapValues(K key) {
Preconditions.checkNotNull(key);
// TODO there is no need to deserialize map key
return () -> new Iterator() {
Iterator> iterator = iterator(key);
@Override
public boolean hasNext() {
return iterator.hasNext();
}
@Override
public MV next() {
return iterator.next().getValue();
}
@Override
public void remove() {
iterator.remove();
}
};
}
@Override
public Map getAll() {
if (metrics.checkAndUpdateKMapMultiGetCounter()) {
return getAllWithMetrics();
} else {
return doGetAll();
}
}
private Map doGetAll() {
Map> results = new HashMap<>();
Iterator iterator = table.dataRegionIterator();
while (iterator.hasNext()) {
GRegionKMapImpl region = (GRegionKMapImpl) iterator.next();
region.getAll(results);
}
return (Map) results;
}
private Map getAllWithMetrics() {
long start = System.nanoTime();
Map value = doGetAll();
long end = System.nanoTime();
metrics.updateKMapMultiGetHistogram(end - start);
for (M o : value.values()) {
if (o != null) {
metrics.updateKMapGetMapSizeHistogram(o.size());
// only select one map to update
break;
}
}
return value;
}
@Override
public void removeAll() {
if (metrics.checkAndUpdateKMapMultiRemoveCounter()) {
removeAllWithMetrics();
} else {
doRemoveAll();
}
}
private void doRemoveAll() {
Iterator iterator = table.dataRegionIterator();
while (iterator.hasNext()) {
GRegionKMapImpl region = (GRegionKMapImpl) iterator.next();
region.removeAll();
}
}
private void removeAllWithMetrics() {
long start = System.nanoTime();
doRemoveAll();
long end = System.nanoTime();
metrics.updateKMapMultiRemoveHistogram(end - start);
}
@Override
public Iterable keys() {
// TODO complexity
return getAll().keySet();
}
@Override
public StateStorage getStateStorage() {
throw new UnsupportedOperationException();
}
@SuppressWarnings("unchecked")
protected AbstractGRegionKMapImpl> getRegion(K key) {
return (AbstractGRegionKMapImpl>) table.getRegion(key);
}
abstract M createMap();
/**
* A map entry for GeminiMapState and GeminiSortedMapState.
* TODO store the serialized map key/value and lazily deserialize them like RocksDBMapEntry.
*/
class GeminiMapEntry implements Map.Entry {
/** True if the entry has been deleted. */
private boolean deleted;
private K key;
private MK mapKey;
private MV mapValue;
GeminiMapEntry(K key, MK mapKey, MV mapValue) {
this.key = key;
this.mapKey = mapKey;
this.mapValue = mapValue;
this.deleted = false;
}
public void remove() {
if (deleted) {
throw new IllegalStateException("Entry has been removed.");
}
deleted = true;
mapValue = null;
// TODO reduce the cost of serialization of key and map key
AbstractGeminiKeyedMapStateImpl.this.remove(key, mapKey);
}
@Override
public MK getKey() {
return mapKey;
}
@Override
public MV getValue() {
return mapValue;
}
@Override
public MV setValue(MV value) {
if (deleted) {
throw new IllegalStateException("The value has already been deleted.");
}
MV oldValue = mapValue;
mapValue = value;
AbstractGeminiKeyedMapStateImpl.this.add(key, mapKey, value);
return oldValue;
}
}
/**
* An iterator wrapper to support remove.
*/
class IteratorWrapper implements Iterator> {
private K key;
Iterator> iterator;
GeminiMapEntry currentEntry;
IteratorWrapper(K key, Iterator> iterator) {
this.key = key;
this.iterator = iterator;
}
@Override
public boolean hasNext() {
return iterator.hasNext();
}
@Override
public Map.Entry next() {
Map.Entry entry = iterator.next();
currentEntry = new GeminiMapEntry(key, entry.getKey(), entry.getValue());
return currentEntry;
}
@Override
public void remove() {
if (currentEntry == null) {
throw new IllegalStateException("The remove operation must be called after a valid next operation.");
}
currentEntry.remove();
}
}
}
