dawidwys commented on a change in pull request #13550: URL: https://github.com/apache/flink/pull/13550#discussion_r502383824
########## File path: flink-streaming-java/src/main/java/org/apache/flink/streaming/api/operators/sorted/state/SingleKeyKeyedStateBackend.java ########## @@ -0,0 +1,260 @@ +/* + * 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.streaming.api.operators.sorted.state; + +import org.apache.flink.api.common.ExecutionConfig; +import org.apache.flink.api.common.state.AggregatingStateDescriptor; +import org.apache.flink.api.common.state.ListStateDescriptor; +import org.apache.flink.api.common.state.MapStateDescriptor; +import org.apache.flink.api.common.state.ReducingStateDescriptor; +import org.apache.flink.api.common.state.State; +import org.apache.flink.api.common.state.StateDescriptor; +import org.apache.flink.api.common.state.ValueStateDescriptor; +import org.apache.flink.api.common.typeutils.TypeSerializer; +import org.apache.flink.api.java.tuple.Tuple2; +import org.apache.flink.runtime.checkpoint.CheckpointOptions; +import org.apache.flink.runtime.state.CheckpointStreamFactory; +import org.apache.flink.runtime.state.CheckpointableKeyedStateBackend; +import org.apache.flink.runtime.state.KeyGroupRange; +import org.apache.flink.runtime.state.KeyGroupedInternalPriorityQueue; +import org.apache.flink.runtime.state.Keyed; +import org.apache.flink.runtime.state.KeyedStateFunction; +import org.apache.flink.runtime.state.KeyedStateHandle; +import org.apache.flink.runtime.state.PriorityComparable; +import org.apache.flink.runtime.state.PriorityComparator; +import org.apache.flink.runtime.state.SnapshotResult; +import org.apache.flink.runtime.state.StateSnapshotTransformer; +import org.apache.flink.runtime.state.heap.HeapPriorityQueueElement; +import org.apache.flink.runtime.state.internal.InternalKvState; +import org.apache.flink.util.FlinkRuntimeException; + +import javax.annotation.Nonnull; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Objects; +import java.util.concurrent.RunnableFuture; +import java.util.stream.Collectors; +import java.util.stream.Stream; + +import static org.apache.flink.util.Preconditions.checkNotNull; + +/** + * A simple {@link CheckpointableKeyedStateBackend} which keeps values for a single key at a time. + * + * <p><b>IMPORTANT:</b> Requires the incoming records to be sorted/grouped by the key. Used in a BATCH style execution. + */ +class SingleKeyKeyedStateBackend<K> implements CheckpointableKeyedStateBackend<K> { + @SuppressWarnings("rawtypes") + private static final Map<Class<? extends StateDescriptor>, StateFactory> STATE_FACTORIES = + Stream.of( + Tuple2.of(ValueStateDescriptor.class, (StateFactory) SingleKeyValueState::create), + Tuple2.of(ListStateDescriptor.class, (StateFactory) SingleKeyListState::create), + Tuple2.of(MapStateDescriptor.class, (StateFactory) SingleKeyMapState::create), + Tuple2.of(AggregatingStateDescriptor.class, (StateFactory) SingleKeyAggregatingState::create), + Tuple2.of(ReducingStateDescriptor.class, (StateFactory) SingleKeyReducingState::create) + ).collect(Collectors.toMap(t -> t.f0, t -> t.f1)); + + private K currentKey = null; + private final TypeSerializer<K> keySerializer; + private final List<KeySelectionListener<K>> keySelectionListeners = new ArrayList<>(); + private final Map<String, State> states = new HashMap<>(); + private final Map<String, KeyGroupedInternalPriorityQueue<?>> priorityQueues = new HashMap<>(); + private final KeyGroupRange keyGroupRange; + + public SingleKeyKeyedStateBackend( + TypeSerializer<K> keySerializer, + KeyGroupRange keyGroupRange) { + this.keySerializer = keySerializer; + this.keyGroupRange = keyGroupRange; + } + + @Override + public void setCurrentKey(K newKey) { + if (!Objects.equals(newKey, currentKey)) { + notifyKeySelected(newKey); + for (State value : states.values()) { + ((AbstractSingleKeyState<?, ?, ?>) value).clearAllNamespaces(); + } + for (KeyGroupedInternalPriorityQueue<?> value : priorityQueues.values()) { + while (value.poll() != null) { + // remove everything for the key + } + } + this.currentKey = newKey; + } + } + + @Override + public K getCurrentKey() { + return currentKey; + } + + @Override + public TypeSerializer<K> getKeySerializer() { + return keySerializer; + } + + @Override + public <N, S extends State, T> void applyToAllKeys( + N namespace, + TypeSerializer<N> namespaceSerializer, + StateDescriptor<S, T> stateDescriptor, + KeyedStateFunction<K, S> function) { + throw new UnsupportedOperationException("applyToAllKeys() is not supported in BATCH execution mode."); Review comment: Will rename the classes. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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