[flink] 04/13: [hotfix][network] Annotate NettyShuffleDescriptor#PartitionConnectionInfo with @FunctionalInterface

[zhijiang]

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commit 7ee937c16088ffcc0d75de64d89dca12be52ec5a
Author: Andrey Zagrebin <azagre...@gmail.com>
AuthorDate: Mon Jul 29 17:29:34 2019 +0300

    [hotfix][network] Annotate NettyShuffleDescriptor#PartitionConnectionInfo 
with @FunctionalInterface
---
 .../java/org/apache/flink/runtime/shuffle/NettyShuffleDescriptor.java    | 1 +
 1 file changed, 1 insertion(+)

diff --git 
a/flink-runtime/src/main/java/org/apache/flink/runtime/shuffle/NettyShuffleDescriptor.java
 
b/flink-runtime/src/main/java/org/apache/flink/runtime/shuffle/NettyShuffleDescriptor.java
index f758bcc..cf58b97 100644
--- 
a/flink-runtime/src/main/java/org/apache/flink/runtime/shuffle/NettyShuffleDescriptor.java
+++ 
b/flink-runtime/src/main/java/org/apache/flink/runtime/shuffle/NettyShuffleDescriptor.java
@@ -70,6 +70,7 @@ public class NettyShuffleDescriptor implements 
ShuffleDescriptor {
        /**
         * Information for connection to partition producer for shuffle 
exchange.
         */
+       @FunctionalInterface
        public interface PartitionConnectionInfo extends Serializable {
                ConnectionID getConnectionId();
        }