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From "ASF GitHub Bot (Jira)" <j...@apache.org>
Subject [jira] [Work logged] (HDDS-1984) Fix listBucket API
Date Tue, 08 Oct 2019 15:45:00 GMT

     [ https://issues.apache.org/jira/browse/HDDS-1984?focusedWorklogId=325134&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-325134

ASF GitHub Bot logged work on HDDS-1984:

                Author: ASF GitHub Bot
            Created on: 08/Oct/19 15:44
            Start Date: 08/Oct/19 15:44
    Worklog Time Spent: 10m 
      Work Description: bharatviswa504 commented on pull request #1555: HDDS-1984. Fix listBucket
URL: https://github.com/apache/hadoop/pull/1555#discussion_r332589314

 File path: hadoop-hdds/common/src/main/java/org/apache/hadoop/hdds/utils/db/cache/CacheKey.java
 @@ -53,4 +53,18 @@ public boolean equals(Object o) {
   public int hashCode() {
     return Objects.hash(key);
+  @Override
+  public int compareTo(Object o) {
+    if(Objects.equals(key, ((CacheKey<?>)o).key)) {
+      return 0;
+    } else {
+      if (key instanceof String) {
+        return ((String) key).compareTo((String) ((CacheKey<?>)o).key);
+      } else {
+        // If not type string, convert to string and compare.
+        return key.toString().compareTo((((CacheKey<?>) o).key).toString());
 Review comment:
   Ya, you are right, my initial approach was that. But as this Table interface is extended
by RDBTable which has byte[] as the parameter, that cannot be done. And also, for now, this
is used for Bucket and VolumeTable we should be good.
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Issue Time Tracking

    Worklog Id:     (was: 325134)
    Time Spent: 2h 40m  (was: 2.5h)

> Fix listBucket API
> ------------------
>                 Key: HDDS-1984
>                 URL: https://issues.apache.org/jira/browse/HDDS-1984
>             Project: Hadoop Distributed Data Store
>          Issue Type: Sub-task
>            Reporter: Bharat Viswanadham
>            Assignee: Bharat Viswanadham
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 2h 40m
>  Remaining Estimate: 0h
> This Jira is to fix listBucket API in HA code path.
> In HA, we have an in-memory cache, where we put the result to in-memory cache and return
the response, later it will be picked by double buffer thread and it will flush to disk. So,
now when do listBuckets, it should use both in-memory cache and rocksdb bucket table to list
buckets in a volume.

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