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Date: Tue, 22 Nov 2011 00:05:40 +0000 (UTC)
From: "Suresh Srinivas (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HDFS-2581) Implement protobuf service for
 JournalProtocol
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    [ https://issues.apache.org/jira/browse/HDFS-2581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13154748#comment-13154748 ] 

Suresh Srinivas commented on HDFS-2581:
---------------------------------------

Here is the approach for implementing for protobuf service:
Protobuf service generated code has BlockingInterface, which is expected to be implemented by Server. However, the existing protocol interface has various annotations (such as kerberos, idempotent etc.). The existing protocol interfaces also have version information and protocol signature, from VersionedProtocol interface. To support that:
# An interface that extends generated BlockingInteface and VersionedProtocol is added.
# In this interface all required annotations and implementations of VersionedProtocol methods are provided.
# Server implementation extends this interface.
# In a subsequent jira, which switches the RPC to use protobuf, the above interface will be used as interface on the server side.

                
> Implement protobuf service for JournalProtocol
> ----------------------------------------------
>
>                 Key: HDFS-2581
>                 URL: https://issues.apache.org/jira/browse/HDFS-2581
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: name-node
>            Reporter: Suresh Srinivas
>            Assignee: Suresh Srinivas
>             Fix For: 0.24.0
>
>         Attachments: HDFS-2581.txt
>
>
> This jira adds implementation for JournalProtocol protobuf service along the same lines as HDFS-2181

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