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https://issues.apache.org/jira/browse/HDDS-1473?focusedWorklogId=234922&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-234922
]
ASF GitHub Bot logged work on HDDS-1473:
----------------------------------------
Author: ASF GitHub Bot
Created on: 29/Apr/19 21:31
Start Date: 29/Apr/19 21:31
Worklog Time Spent: 10m
Work Description: arp7 commented on pull request #781: HDDS-1473.
DataNode ID file should be human readable.
URL: https://github.com/apache/hadoop/pull/781#discussion_r279546838
##########
File path:
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/helpers/DatanodeIdYaml.java
##########
@@ -0,0 +1,186 @@
+/**
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.ozone.container.common.helpers;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import java.io.Writer;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import org.apache.commons.collections.CollectionUtils;
+import org.apache.commons.collections.MapUtils;
+import org.apache.hadoop.hdds.protocol.DatanodeDetails;
+import org.yaml.snakeyaml.DumperOptions;
+import org.yaml.snakeyaml.Yaml;
+
+import com.google.common.base.Preconditions;
+
+/**
+ * Class for creating datanode.id file in yaml format.
+ */
+public class DatanodeIdYaml {
+
+ private DatanodeIdYaml() {
+
+ }
+
+ /**
+ * Creates a yaml file using DatnodeDetails. This method expects the path
+ * validation to be performed by the caller.
+ *
+ * @param datanodeDetails {@link DatanodeDetails}
+ * @param path Path to datnode.id file
+ */
+ public static void createDatanodeIdFile(DatanodeDetails datanodeDetails,
+ File path) throws IOException {
+ Preconditions.checkNotNull(path);
Review comment:
This is usually an anti-pattern, since we will crash below with NPE if path
was somehow null.
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Issue Time Tracking
-------------------
Worklog Id: (was: 234922)
Time Spent: 1h (was: 50m)
> DataNode ID file should be human readable
> -----------------------------------------
>
> Key: HDDS-1473
> URL: https://issues.apache.org/jira/browse/HDDS-1473
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Components: Ozone Datanode
> Reporter: Arpit Agarwal
> Assignee: Siddharth Wagle
> Priority: Major
> Labels: newbie, pull-request-available
> Time Spent: 1h
> Remaining Estimate: 0h
>
> The DataNode ID file should be human readable to make debugging easier. We
> should use YAML as we have used it elsewhere for meta files.
> Currently it is a binary file whose contents are protobuf encoded. This is a
> tiny file read once on startup, so performance is not a concern.
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