guoweiM commented on a change in pull request #14: URL: https://github.com/apache/flink-ml/pull/14#discussion_r739747467
########## File path: flink-ml-iteration/src/main/java/org/apache/flink/iteration/proxy/state/ProxyKeyedStateBackend.java ########## @@ -0,0 +1,235 @@ +/* + * 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.iteration.proxy.state; + +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.KeyedStateBackend; +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.SavepointResources; +import org.apache.flink.runtime.state.SnapshotResult; +import org.apache.flink.runtime.state.StateSnapshotTransformer; +import org.apache.flink.runtime.state.heap.HeapPriorityQueueElement; + +import javax.annotation.Nonnull; + +import java.io.IOException; +import java.util.Map; +import java.util.concurrent.RunnableFuture; +import java.util.stream.Stream; + +/** Proxy {@link KeyedStateBackend} for the wrapped operators. */ +public class ProxyKeyedStateBackend<K> implements CheckpointableKeyedStateBackend<K> { + + private final CheckpointableKeyedStateBackend<K> wrappedBackend; + + private final String stateNamePrefix; + + public ProxyKeyedStateBackend( + CheckpointableKeyedStateBackend<K> wrappedBackend, String stateNamePrefix) { + this.wrappedBackend = wrappedBackend; + this.stateNamePrefix = stateNamePrefix; + } + + @Override + public void setCurrentKey(K newKey) { + wrappedBackend.setCurrentKey(newKey); + } + + @Override + public K getCurrentKey() { + return wrappedBackend.getCurrentKey(); + } + + @Override + public TypeSerializer<K> getKeySerializer() { + return wrappedBackend.getKeySerializer(); + } + + @Override + public <N, S extends State, T> void applyToAllKeys( + N namespace, + TypeSerializer<N> namespaceSerializer, + StateDescriptor<S, T> stateDescriptor, + KeyedStateFunction<K, S> function) + throws Exception { + StateDescriptor<S, T> newDescriptor = createNewDescriptor(stateDescriptor); + wrappedBackend.applyToAllKeys(namespace, namespaceSerializer, newDescriptor, function); + } + + @Override + public <N> Stream<K> getKeys(String state, N namespace) { + return wrappedBackend.getKeys(stateNamePrefix + state, namespace); + } + + @Override + public <N> Stream<Tuple2<K, N>> getKeysAndNamespaces(String state) { + return wrappedBackend.getKeysAndNamespaces(stateNamePrefix + state); + } + + @Override + public <N, S extends State, T> S getOrCreateKeyedState( + TypeSerializer<N> namespaceSerializer, StateDescriptor<S, T> stateDescriptor) + throws Exception { + StateDescriptor<S, T> newDescriptor = createNewDescriptor(stateDescriptor); + return wrappedBackend.getOrCreateKeyedState(namespaceSerializer, newDescriptor); + } + + @Override + public <N, S extends State> S getPartitionedState( + N namespace, + TypeSerializer<N> namespaceSerializer, + StateDescriptor<S, ?> stateDescriptor) + throws Exception { + StateDescriptor<S, ?> newDescriptor = createNewDescriptor(stateDescriptor); + return wrappedBackend.getPartitionedState(namespace, namespaceSerializer, newDescriptor); + } + + @Override + public void registerKeySelectionListener(KeySelectionListener<K> listener) { + wrappedBackend.registerKeySelectionListener(listener); + } + + @Override + public boolean deregisterKeySelectionListener(KeySelectionListener<K> listener) { + return wrappedBackend.deregisterKeySelectionListener(listener); + } + + @Nonnull + @Override + public <N, SV, SEV, S extends State, IS extends S> IS createInternalState( + @Nonnull TypeSerializer<N> namespaceSerializer, + @Nonnull StateDescriptor<S, SV> stateDesc, + @Nonnull + StateSnapshotTransformer.StateSnapshotTransformFactory<SEV> + snapshotTransformFactory) + throws Exception { + StateDescriptor<S, ?> newDescriptor = createNewDescriptor(stateDesc); + return wrappedBackend.createInternalState( + namespaceSerializer, newDescriptor, snapshotTransformFactory); + } + + @SuppressWarnings("unchecked") + protected <S extends State, T> StateDescriptor<S, T> createNewDescriptor( + StateDescriptor<S, T> descriptor) { + switch (descriptor.getType()) { + case VALUE: + { + return (StateDescriptor<S, T>) + new ValueStateDescriptor<>( + stateNamePrefix + descriptor.getName(), + descriptor.getSerializer()); + } + case LIST: + { + ListStateDescriptor<T> listStateDescriptor = + (ListStateDescriptor<T>) descriptor; + return (StateDescriptor<S, T>) + new ListStateDescriptor<>( + stateNamePrefix + listStateDescriptor.getName(), + listStateDescriptor.getElementSerializer()); + } + case REDUCING: + { + ReducingStateDescriptor<T> reducingStateDescriptor = + (ReducingStateDescriptor<T>) descriptor; + return (StateDescriptor<S, T>) + new ReducingStateDescriptor<>( + stateNamePrefix + reducingStateDescriptor.getName(), + reducingStateDescriptor.getReduceFunction(), + reducingStateDescriptor.getSerializer()); + } + case AGGREGATING: + { + AggregatingStateDescriptor<?, ?, T> aggregatingStateDescriptor = + (AggregatingStateDescriptor<?, ?, T>) descriptor; + return new AggregatingStateDescriptor( + stateNamePrefix + aggregatingStateDescriptor.getName(), Review comment: Same as above. Maybe we could extract a common method for this. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
