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https://issues.apache.org/jira/browse/FLINK-4844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15582788#comment-15582788
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ASF GitHub Bot commented on FLINK-4844:
---------------------------------------
Github user aljoscha commented on a diff in the pull request:
https://github.com/apache/flink/pull/2648#discussion_r83678862
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/state/ManagedSnapshotContext.java
---
@@ -0,0 +1,41 @@
+/*
+ * 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;
+
+import org.apache.flink.annotation.PublicEvolving;
+
+/**
+ * This interface provides a context in which operators that use managed
state (i.e. state that is managed by state
+ * backends) can perform a snapshot. As snapshots of the backends
themselves are taken by the system, this interface
+ * mainly provides meta information about the checkpoint.
+ */
+@PublicEvolving
+public interface ManagedSnapshotContext {
--- End diff --
Same comments as for `ManagedInitializationContext` hold here.
> Partitionable Raw Keyed/Operator State
> --------------------------------------
>
> Key: FLINK-4844
> URL: https://issues.apache.org/jira/browse/FLINK-4844
> Project: Flink
> Issue Type: New Feature
> Reporter: Stefan Richter
> Assignee: Stefan Richter
>
> Partitionable operator and keyed state are currently only available by using
> backends. However, the serialization code for many operators is build around
> reading/writing their state to a stream for checkpointing. We want to provide
> partitionable states also through streams, so that migrating existing
> operators becomes more easy.
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