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From "Eric Charles (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9299) Generate the protobuf classes with hadoop-maven-plugin
Date Fri, 23 Aug 2013 17:16:52 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9299?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13748728#comment-13748728
] 

Eric Charles commented on HBASE-9299:
-------------------------------------

yes, protoc will be run at every build, putting the java file in target/..., that's how the
plugins that generate work. but written in the README.txt, protoc is fast.

The idea is to commit a plugin commented-in. So it will not be invoked. Only developers willing
to run the plugin sould comment-out the definition. Does it make sense? Maybe you can write
a clearer sentence?
                
> Generate the protobuf classes with hadoop-maven-plugin
> ------------------------------------------------------
>
>                 Key: HBASE-9299
>                 URL: https://issues.apache.org/jira/browse/HBASE-9299
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Eric Charles
>         Attachments: HBASE-9299.patch
>
>
> For now, the protobuf classes are generated once by a dev, and put in src/main/resouce.

> This allows the other dev to not have the correct protoc version available on their machine.
However, when a dev wants to modify the protoc messages, he has to know how to generate the
classes. This could be documented...
> Another approach would be to put a harder requirement on the hbase developers (protoc
available) and let the hadoop-maven-plugin (http://central.maven.org/maven2/org/apache/hadoop/hadoop-maven-plugins/2.0.5-alpha)
to do the work (I have bad experience with other maven protobuf plugins, the hadoop one works
just out of the box).
> I don't think asking to install protoc to build hbase is so difficult, but that's an
additional step between the dev and the artifcat.
> The advantage would be to allow to have different protobuf versions for different hbase
distributions (perfectly possible but quite theorical).
> So
> option 1: We are happy to keep the classes in src/main/java
> option 2: We want to move to hadoop-maven-plugin 
> option 3: I may be short of idea... any other input?

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