[flink] 02/06: [FLINK-30755][api] Introduce SupportsConcurrentExecutionAttempts interface

[zh...@apache.org]

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zhuzh pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/flink.git

commit 2690fb17ea380d6102e53e2985617bef8e517659
Author: ifndef-SleePy <mm...@gmail.com>
AuthorDate: Mon Jan 23 00:21:18 2023 +0800

    [FLINK-30755][api] Introduce SupportsConcurrentExecutionAttempts interface
---
 .../SupportsConcurrentExecutionAttempts.java       | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/flink-core/src/main/java/org/apache/flink/api/common/SupportsConcurrentExecutionAttempts.java b/flink-core/src/main/java/org/apache/flink/api/common/SupportsConcurrentExecutionAttempts.java
new file mode 100644
index 00000000000..69e0d5e64e0
--- /dev/null
+++ b/flink-core/src/main/java/org/apache/flink/api/common/SupportsConcurrentExecutionAttempts.java
@@ -0,0 +1,31 @@
+/*
+ * 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.api.common;
+
+import org.apache.flink.annotation.PublicEvolving;
+
+/**
+ * The interface indicates that it supports multiple attempts executing at the same time.
+ *
+ * <p>Currently, the interface is used for speculative execution. If a sink implementation (SinkV2,
+ * OutputFormat or SinkFunction) inherits this interface, the sink operator would be considered to
+ * support speculative execution.
+ */
+@PublicEvolving
+public interface SupportsConcurrentExecutionAttempts {}