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https://issues.apache.org/jira/browse/FLINK-3093?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15045086#comment-15045086
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ASF GitHub Bot commented on FLINK-3093:
---------------------------------------
Github user aljoscha commented on a diff in the pull request:
https://github.com/apache/flink/pull/1427#discussion_r46833253
--- Diff:
flink-annotations/src/main/java/org/apache/flink/annotation/PublicExperimental.java
---
@@ -0,0 +1,30 @@
+/*
+ * 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.annotation;
+
+import java.lang.annotation.Documented;
+
+/**
+ * Interface to mark methods within stable, public APIs as experimental.
--- End diff --
It is also used to mark classes/interfaces, not just methods.
> Introduce annotations for interface stability
> ---------------------------------------------
>
> Key: FLINK-3093
> URL: https://issues.apache.org/jira/browse/FLINK-3093
> Project: Flink
> Issue Type: New Feature
> Components: Build System
> Affects Versions: 1.0.0
> Reporter: Robert Metzger
> Assignee: Robert Metzger
> Priority: Blocker
>
> For the upcoming 1.0 release, we want to mark interfaces as public/stable so
> that we can automatically ensure that newer Flink releases (1.1, 1.2, ..) are
> not breaking them.
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