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From "Jesse Yates (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4336) Convert source tree into maven modules
Date Tue, 08 May 2012 18:41:49 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4336?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13270697#comment-13270697
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Jesse Yates commented on HBASE-4336:
------------------------------------

For those looking to jump into the changes, here is basically the outline of what is going
on in hbase/pom.xml

1) moved all the dependencies into the dependencyManagement section and plugins into pluginManagement
(so submodules will all use the same version)
2) Moved the per-proflie dependencies (different versions of hadoop) into the hbase-core pom
3) Moved all the assembly of the final package into the hbase-assemble pom
4) Different profiles are retained in the parent for setting general properties for the children
modules (e.g. test profiles for the test properties, hadoop profiles for the hadoop versions)
5) Added a couple of dependencies/plugiuns that will probably be used by most children (test
stuff, apache-rat, etc).
6) General cleanup for spacing
                
> Convert source tree into maven modules
> --------------------------------------
>
>                 Key: HBASE-4336
>                 URL: https://issues.apache.org/jira/browse/HBASE-4336
>             Project: HBase
>          Issue Type: Task
>          Components: build
>            Reporter: Gary Helmling
>            Priority: Critical
>             Fix For: 0.96.0
>
>
> When we originally converted the build to maven we had a single "core" module defined,
but later reverted this to a module-less build for the sake of simplicity.
> It now looks like it's time to re-address this, as we have an actual need for modules
to:
> * provide a trimmed down "client" library that applications can make use of
> * more cleanly support building against different versions of Hadoop, in place of some
of the reflection machinations currently required
> * incorporate the secure RPC engine that depends on some secure Hadoop classes
> I propose we start simply by refactoring into two initial modules:
> * core - common classes and utilities, and client-side code and interfaces
> * server - master and region server implementations and supporting code
> This would also lay the groundwork for incorporating the HBase security features that
have been developed.  Once the module structure is in place, security-related features could
then be incorporated into a third module -- "security" -- after normal review and approval.
 The security module could then depend on secure Hadoop, without modifying the dependencies
of the rest of the HBase code.

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