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From "Ashwanth Fernando (JIRA)" <j...@apache.org>
Subject [jira] [Created] (KAFKA-865) Mavenize and separate the client.
Date Wed, 17 Apr 2013 21:39:15 GMT
Ashwanth Fernando created KAFKA-865:

             Summary: Mavenize and separate the client.
                 Key: KAFKA-865
                 URL: https://issues.apache.org/jira/browse/KAFKA-865
             Project: Kafka
          Issue Type: Improvement
          Components: clients
    Affects Versions: 0.8
            Reporter: Ashwanth Fernando

It seems that the java client for Kafka is also bundled with the server JAR file and this
is generated using sbt package. This is difficult for java folks to work with because:

1) Many java shops use maven (and a lot of them have a Sonatype Nexus repository in house)
for dependency management. They want to specify the GAV and bang, the client jar and all its
dependencies should be added to the application's classpath. I can't do that right now, because
I need to run ./sbt eclipse, get the .JAR, add that to my classpath, add a whole lot of dependencies
(log4j, slf4j, zkClient and so on) manually, which is a pain. 

There are 90 million maven central uploads/downloads in 2012 alone. Almost all the java shops
out there have maven (either central or in house sonatype).

2) Separation of concerns - keeping the server (core) and the client's classes increases the
size of the bundle for the client and also everytime the server's code changes and a release
is performed, the client also needs to update their .JAR file. which is not very great. We
don't want a ton of clients to update their .JAR file, just because a faster replication strategy
for my kafka cluster changed in a new release.

Action items are to separate the client portion of Kafka, add it in a pom along with the compile
time dependencies and upload it to Maven Central or if you have a LinkedIn externally exposed
Nexus, over there.

This will increase adoption of the Kafka framework.

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