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https://issues.apache.org/jira/browse/FLINK-5041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15725650#comment-15725650
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ASF GitHub Bot commented on FLINK-5041:
---------------------------------------
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)
> Implement savepoint backwards compatibility 1.1 -> 1.2
> ------------------------------------------------------
>
> Key: FLINK-5041
> URL: https://issues.apache.org/jira/browse/FLINK-5041
> Project: Flink
> Issue Type: New Feature
> Components: State Backends, Checkpointing
> Affects Versions: 1.2.0
> Reporter: Stefan Richter
> Assignee: Stefan Richter
>
> This issue tracks the implementation of backwards compatibility between Flink
> 1.1 and 1.2 releases.
> This task subsumes:
> - Converting old savepoints to new savepoints, including a conversion of
> state handles to their new replacement.
> - Converting keyed state from old backend implementations to their new
> counterparts.
> - Converting operator and function state for all changed operators.
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