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Posted to yarn-issues@hadoop.apache.org by "Daniel Templeton (JIRA)" <ji...@apache.org> on 2016/03/10 00:15:41 UTC
[jira] [Updated] (YARN-4457) Cleanup unchecked types for
EventHandler
[ https://issues.apache.org/jira/browse/YARN-4457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Daniel Templeton updated YARN-4457:
-----------------------------------
Attachment: YARN-4457.003.patch
Rebased patch.
> Cleanup unchecked types for EventHandler
> ----------------------------------------
>
> Key: YARN-4457
> URL: https://issues.apache.org/jira/browse/YARN-4457
> Project: Hadoop YARN
> Issue Type: Improvement
> Affects Versions: 2.7.1
> Reporter: Daniel Templeton
> Assignee: Daniel Templeton
> Attachments: YARN-4457.001.patch, YARN-4457.002.patch, YARN-4457.003.patch
>
>
> The EventHandler class is often used in an untyped context resulting in a bunch of warnings about unchecked usage. The culprit is the {{Dispatcher.getHandler()}} method. Fixing the typing on the method to return {{EventHandler<Event>}} instead of {{EventHandler}} clears up the errors and doesn't not introduce any incompatible changes. In the case that some code does:
> {code}
> EventHandler h = dispatcher.getHandler();
> {code}
> it will still work and will issue a compiler warning about raw types. There are, however, no instances of this issue in the current source base.
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