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Posted to issues@ozone.apache.org by "Marton Elek (Jira)" <ji...@apache.org> on 2020/04/21 08:35:00 UTC
[jira] [Resolved] (HDDS-3101) Depend on lightweight
ConfigurationSource interface instead of Hadoop Configuration
[ https://issues.apache.org/jira/browse/HDDS-3101?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Marton Elek resolved HDDS-3101.
-------------------------------
Fix Version/s: 0.6.0
Target Version/s: 0.6.0
Resolution: Fixed
> Depend on lightweight ConfigurationSource interface instead of Hadoop Configuration
> -----------------------------------------------------------------------------------
>
> Key: HDDS-3101
> URL: https://issues.apache.org/jira/browse/HDDS-3101
> Project: Hadoop Distributed Data Store
> Issue Type: Improvement
> Reporter: Marton Elek
> Assignee: Marton Elek
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.6.0
>
>
> To make it possible to create different client jars compiled with different version of Hadoop we need clear and Hadoop independent hdds-common (and hdds-client) projects.
> (For more details about the motivation, check this design doc: https://lists.apache.org/thread.html/rd0ea00f958368e888db1947eb71e514fb977df0b7baaad928ac50e94%40%3Cozone-dev.hadoop.apache.org%3E)
> Our current blocker is the usage of `org.apache.hadoop.conf.Configuration`. Configuration class is a heavyweight object from hadoop-common which introduce a lot of unnecessary dependencies. It also violates multiple [OOP principles|https://en.wikipedia.org/wiki/SOLID], for example the *Dependency inversion principle*.
> To make our components more independent I propose to depend on a lightweight ConfigurationSource interface which includes all the required getXXX methods. OzoneConfiguration can implement that interface (and with older Hadoop we can create direct adapters).
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