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https://issues.apache.org/jira/browse/HDFS-17543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17852995#comment-17852995
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ASF GitHub Bot commented on HDFS-17543:
---------------------------------------
KeeProMise commented on code in PR #6868:
URL: https://github.com/apache/hadoop/pull/6868#discussion_r1630547741
##########
hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/async/AsyncForEachRun.java:
##########
@@ -0,0 +1,97 @@
+/**
+ * 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.hadoop.hdfs.server.federation.router.async;
+
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+
+public class AsyncForEachRun<I, T, R> implements AsyncRun<R> {
Review Comment:
@hfutatzhanghb Thanks for your suggestion, I will add javadoc for these
classes
> [ARR]: AsyncUtil makes asynchronous code more concise and easier.
> -----------------------------------------------------------------
>
> Key: HDFS-17543
> URL: https://issues.apache.org/jira/browse/HDFS-17543
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Jian Zhang
> Assignee: Jian Zhang
> Priority: Major
> Labels: pull-request-available
>
> *Describe*
> Using the original Java CompletableFuture to implement an asynchronous router
> is not conducive to the development of the open source community due to poor
> code readability and maintainability. Therefore, I have implemented a
> lightweight tool that encapsulates CompletableFuture.
> By using this AsyncUtil, it is easy to write readable asynchronous code,
> which is easy for everyone to understand. I have provided an example of this
> tool class in UT, demonstrating how to change synchronous methods to
> asynchronous code.
>
> *Examples and tests*
> SyncClass provides some common synchronization methods
> AsyncClass is the corresponding asynchronous implementation
> Use TestAsyncUtil to simultaneously test the methods corresponding to
> SyncClass and AsyncClass, ensuring that both asynchronous and synchronous
> methods return the same results
>
> {*}NOTE{*}: In HDFS-17545, I used this tool to implement RouterAsyncRpcClient
> which extends RouterRpcClient. You can also view RouterAsyncRpcClient to
> understand the use of this tool.
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