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From "Lei (Eddy) Xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-14394) Provide Builder pattern for DistributedFileSystem.create
Date Thu, 01 Jun 2017 23:48:04 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-14394?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lei (Eddy) Xu updated HADOOP-14394:
-----------------------------------
    Attachment: HADOOP-14394.02.patch

Thanks for the reviews, [~andrew.wang]

bq. Why did we take the defaults out of the getters and put them into the constructor? This
increases coupling with the parent class.

The reason behind this is that I feel using {{null}} to check whether a field is set is little
error-prone, and can lead NullPointerException in the future. And since this patch is also
against branch-2.9, which does not allow to use JDK8 {{Optional}},  I chose to set the default
values in the constructor instead. 

{code}
fs.createFile(path).getPermission().
{code} 

bq. setOptions comments

Ok, I removed {{setOptions}} related code from this patch, and will file a new JIRA for it.

Also addressed all other comments. 

Please take another look, thanks! 

Also ping [~steve_l] and [~stack] for more inputs. Thanks!

> Provide Builder pattern for DistributedFileSystem.create
> --------------------------------------------------------
>
>                 Key: HADOOP-14394
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14394
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs
>    Affects Versions: 2.9.0
>            Reporter: Lei (Eddy) Xu
>            Assignee: Lei (Eddy) Xu
>         Attachments: HADOOP-14394.00.patch, HADOOP-14394.01.patch, HADOOP-14394.02.patch
>
>
> This JIRA continues to refine the {{FSOutputStreamBuilder}} interface introduced in HDFS-11170.

> It should also provide a spec for the Builder API.



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