[jira] [Updated] (ZOOKEEPER-4032) Use `Map.computeIfAbsent` instead of `if Map.get is null then put value`

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-4032?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated ZOOKEEPER-4032:
--------------------------------------
    Labels: pull-request-available  (was: )

> Use `Map.computeIfAbsent` instead of `if Map.get is null then put value`
> ------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-4032
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4032
>             Project: ZooKeeper
>          Issue Type: Improvement
>          Components: server
>            Reporter: LiAoNan
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> In this method
> {code:java}
> WatchManager.addWatch(String path, Watcher watcher, WatcherMode watcherMode)
> {code}
> use 
> {code:java}
> Map.computeIfAbsent
> {code}
>  simplify code like 
> {code:java}
>         Set<String> paths = watch2Paths.get(watcher);
>         if (paths == null) {
>             paths = new HashSet<>();
>             watch2Paths.put(watcher, paths);
>         }
> {code}
> result:
> {code:java}
> Set<String> paths = watch2Paths.computeIfAbsent(watcher, k -> new HashSet<>());
> {code}



--
This message was sent by Atlassian Jira
(v8.3.4#803005)