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https://issues.apache.org/jira/browse/TAJO-1331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14375459#comment-14375459
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David Chen commented on TAJO-1331:
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By the way, Google has just open-sourced GRPC, an RPC framework for Protobuf 
(http://grpc.io). If we also want to make Tajo's Protobuf-based RPC interface 
more portable, GRPC would be an excellent choice since it already supports a 
large number of languages, including C++, Java, and even C#.

If this is something we are interested in doing, I can open a separate ticket 
for this.

> Add REST Client API
> -------------------
>
>                 Key: TAJO-1331
>                 URL: https://issues.apache.org/jira/browse/TAJO-1331
>             Project: Tajo
>          Issue Type: New Feature
>          Components: client
>            Reporter: Hyunsik Choi
>            Assignee: Jihun Kang
>         Attachments: TajoClientRestAPIDesign_draft.pdf, 
> TajoClientRestAPIDesign_v0.1.pdf
>
>
> Currently, there is only protobuf-based TCP protocol for client. It works 
> well.
> However, even though protobuf itself is very portable, our protobuf-based 
> client protocol is not portable. This is because protocol buffer does not 
> provide RPC implementation and it just provides RPC stub and marshalling 
> method.
> The main objective of this issue is to implement RESTful API for client. This 
> technique is very widely used in many applications. REST does not require any 
> heavy dependency. It is expected that many third-party client API can be 
> easily implemented with REST client API. 



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