Github user StephanEwen commented on a diff in the pull request: https://github.com/apache/flink/pull/2781#discussion_r91083520 --- Diff: flink-runtime/src/main/java/org/apache/flink/migration/runtime/state/AbstractStateBackend.java --- @@ -0,0 +1,68 @@ +/* + * 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.migration.runtime.state; + +import org.apache.flink.core.memory.DataInputView; +import org.apache.flink.core.memory.DataInputViewStreamWrapper; + +import java.io.IOException; +import java.io.Serializable; + +/** + * A state backend defines how state is stored and snapshotted during checkpoints. + */ +@Deprecated +public abstract class AbstractStateBackend implements Serializable { + + private static final long serialVersionUID = 4620413814639220247L; + + /** + * Simple state handle that resolved a {@link DataInputView} from a StreamStateHandle. + */ + private static final class DataInputViewHandle implements StateHandle<DataInputView> { + + private static final long serialVersionUID = 2891559813513532079L; + + private final StreamStateHandle stream; + + private DataInputViewHandle(StreamStateHandle stream) { + this.stream = stream; + } + + @Override + public DataInputView getState(ClassLoader userCodeClassLoader) throws Exception { + return new DataInputViewStreamWrapper(stream.getState(userCodeClassLoader)); + } + + @Override + public void discardState() throws Exception { + stream.discardState(); --- End diff -- Deactivate this method (see above)
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