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https://issues.apache.org/jira/browse/FLINK-5823?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15949137#comment-15949137
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ASF GitHub Bot commented on FLINK-5823:
---------------------------------------
Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/3522#discussion_r108469956
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/state/CheckpointMetadataStreamFactory.java
---
@@ -0,0 +1,101 @@
+/*
+ * 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.core.fs.FSDataOutputStream;
+
+import java.io.IOException;
+
+import static org.apache.flink.util.Preconditions.checkNotNull;
+
+/**
+ * The {@link CheckpointMetadataStreamFactory} creates streams to write
checkpoint <i>metadata</i>,
+ * similar as the {@link CheckpointStreamFactory} creates streams to write
checkpoint <i>data</i>.
+ */
+public interface CheckpointMetadataStreamFactory {
+
+ /**
+ * Creates a stream to write the metadata for the particular checkpoint
that this factory
+ * belongs to.
+ *
+ * @return The metadata output stream for this factory's checkpoint.
+ * @throws IOException Thrown, if the stream could not be opened.
+ */
+ CheckpointMetadataOutputStream createCheckpointStateOutputStream()
throws IOException;
+
+ /**
+ * Gets the location (as a string pointer) where the metadata factory
--- End diff --
Sentence does not seem to be complete
> Store Checkpoint Root Metadata in StateBackend (not in HA custom store)
> -----------------------------------------------------------------------
>
> Key: FLINK-5823
> URL: https://issues.apache.org/jira/browse/FLINK-5823
> Project: Flink
> Issue Type: Sub-task
> Components: State Backends, Checkpointing
> Reporter: Stephan Ewen
> Assignee: Stephan Ewen
> Fix For: 1.3.0
>
>
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