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https://issues.apache.org/jira/browse/HADOOP-19217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17862393#comment-17862393
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Steve Loughran commented on HADOOP-19217:
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ok, in HADOOP-18013 I tried to start on this with an fs.SCHEME.trash policy;
having a full API would be even more agile
* see the javadoc comments in the top of FileSystem.java about implementing any
new filesystem api
* needs matching coverage in filestystem.md specification and a contract test.
> Introduce getTrashPolicy to FileSystem API
> ------------------------------------------
>
> Key: HADOOP-19217
> URL: https://issues.apache.org/jira/browse/HADOOP-19217
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Reporter: Ivan Andika
> Priority: Major
>
> Hadoop FileSystem supports multiple FileSystem implementations awareness
> (e.g. client is aware of both hdfs:// and ofs:// protocols).
> However, it seems that currently Hadoop TrashPolicy remains the same
> regardless of the URI scheme. The TrashPolicy is governed by
> "fs.trash.classname" configuration and stays the same regardless of the
> FileSystem implementation. For example, HDFS defaults to TrashPolicyDefault
> and Ozone defaults to TrashPolicyOzone, but only one will be picked since the
> the configuration will be overwritten by the other.
> Therefore, I propose to tie the TrashPolicy implementation to each FileSystem
> implementation by introducing a new FileSystem#getTrashPolicy interface.
> TrashPolicy#getInstance can call FileSystem#getTrashPolicy to get the
> appropriate TrashPolicy.
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