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https://issues.apache.org/jira/browse/HDFS-4353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13546524#comment-13546524
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Todd Lipcon commented on HDFS-4353:
-----------------------------------
I'll commit this later tonight or tomorrow morning unless there are any other
comments.
> Encapsulate connections to peers in Peer and PeerServer classes
> ---------------------------------------------------------------
>
> Key: HDFS-4353
> URL: https://issues.apache.org/jira/browse/HDFS-4353
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, hdfs-client
> Affects Versions: 2.0.3-alpha
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Attachments: 02b-cumulative.patch, 02c.patch, 02c.patch,
> 02-cumulative.patch, 02d.patch, 02e.patch, 02f.patch
>
>
> Encapsulate connections to peers into the {{Peer}} and {{PeerServer}}
> classes. Since many Java classes may be involved with these connections, it
> makes sense to create a container for them. For example, a connection to a
> peer may have an input stream, output stream, readablebytechannel, encrypted
> output stream, and encrypted input stream associated with it.
> This makes us less dependent on the {{NetUtils}} methods which use
> {{instanceof}} to manipulate socket and stream states based on the runtime
> type. it also paves the way to introduce UNIX domain sockets which don't
> inherit from {{java.net.Socket}}.
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