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From: davidb@apache.org
Date: Fri, 29 May 2009 14:12:20 +0100
Message-ID: <a1e060230905290612k4d124512h379dd9a8fd4cbba1@mail.gmail.com>
Subject: Some thoughts on Zookeeper after using it for a while in the
	CXF/DOSGi subproject
To: zookeeper-user@hadoop.apache.org
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Hi all,

I have started using Zookeeper to provide Discovery implementation in
the Distributed OSGi codebase in the CXF/DOSGi subproject
(http://cxf.apache.org/distributed-osgi.html).

It works great (hey! a happy customer) but I do have some thoughts
regarding Maven and OSGi.
* In CXF we use Maven to build everything. To depend on Zookeeper we
need to pull it in from a Maven repository. I couldn't find Zookeeper
in any main Maven repos, so currently we're pulling it in from
http://people.apache.org/~chirino/zk-repo (a private repo), which is
not ideal. Would there be any chance of getting the zookeeper.jar file
deployed to one of the main Maven repo's (e.g.
http://repo2.maven.org/maven2/)?
* To use Zookeeper from within OSGi it has to be turned into an OSGi
bundle. Doing this is not hard and it's currently done in our
buildsystem [1]. However, I think it would make sense to have this
done somewhere in the Zookeeper buildsystem. Matter of fact I think
you should be able to release a single zookeeper.jar that's both an
ordinary jar and an OSGi bundle so it would work in both cases...
* The Zookeeper server is currently started with the zkServer.sh
script, but I think it would make sense to also allow it to run inside
an OSGi container, simply by starting a bundle. Has anyone ever done
any work in this regard? If not I'm planning to spend some time and
try to make this work.
* BTW I made some Windows versions of the zkCli/zkEnv/zkServer
scripts. Interested in taking these?

Thoughts anyone?

Best regards,

David Bosschaert

[1] http://svn.apache.org/repos/asf/cxf/dosgi/trunk/discovery/distributed/zookeeper-wrapper/pom.xml