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Subject Re: [VOTE] Accept Apache Ace into the Incubator
Date Mon, 20 Apr 2009 08:56:20 GMT
(non binding vote)


On 4/19/2009, "Karl Pauls" <> wrote:

>Please vote on accepting Apache Ace for incubation at the Apache
>Incubator. The full proposal is available at the end of this message
>and as a wiki page at We
>ask the Incubator PMC to sponsor it, with Karl as the Champion, and
>Carsten, Niclas and Bertrand volunteering to be mentors.
>Please cast your votes:
>[ ]  +1, bring Ace into Incubator
>[ ]  +0, I don't care either way,
>[ ]  -1, do not bring Ace into Incubator, because...
>The vote is open for the next 72 hours and only votes from the
>Incubator PMC are binding.
>- - - - - - - - - -
>Apache Ace is a software distribution framework based on OSGi that
>allows you to manage and distribute artifacts, like e.g. software
>Apache Ace is a software distribution framework that allows you to
>centrally manage and distribute software components, configuration
>data and other artifacts to target systems. It is built using OSGi and
>can be deployed in different topologies. The target systems are
>usually also OSGi based, but don't have to be.
>When assembling software out of reusable components, the task of
>deploying software onto an ever increasing number of targets is not
>trivial to solve. This becomes even harder when these targets require
>different components based on who's using them.
>A key technology in the Java space for developing component based
>applications is OSGi. The OSGi specification, which has been around
>since 1999 and by now has matured into the de facto module system for
>Java, allows you to write components that can interact through
>services and that allows components to be updated individually,
>without disturbing the rest of the components.
>Although the OSGi specification describes how software distribution
>should be done, it does not actually prescribe any protocols or
>implementations. Apache Ace implements a software distribution system
>based on, but not limited to OSGi. It is setup so it can deal with
>different target types, using different protocols. Also, it can handle
>an extensible number of artifact types (bundles, configurations,
>resources, ...).
>When you start using OSGi to build reusable components, the task of
>managing those components and their use in various applications
>becomes non-trivial. Apache Ace allows you to group those components
>and assign them to a managed set of targets. This allows you to
>distribute updates and new components easily, while keeping a full
>history of what was installed where during what period. It also helps
>you setup an automated development, QA/testing, staging and production
>Initial Goals
>The initial goals for Apache Ace are:
>* Donate the existing codebase and import it.
>* Setup the incubation infrastructure (svn repository, build system,
>website) so we can run continuous builds with automated tests and
>publish all available documentation.
>* Get people involved in advancing the code base in different
>directions, integrating it with other projects at Apache.
>* Prepare for an initial release that demonstrates the systems core
>* Present the project to the community at ApacheCon 2009 US.
>Current Status
>The current codebase is developed and tested in various
>configurations. It was developed at luminis over the last couple of
>years using Scrum, so we have internally demonstrated we can release
>often and produce working code using a transparent process.
>Documentation for the project is now available on an internal wiki,
>which can be donated and converted to the Apache Ace website. We did
>not yet use mailing lists as the primary colaborative process, as the
>whole team met face to face on a daily basis.
>Some of the core developers are already committers and PMC members at
>Apache, so they understand what it means to have a process based on
>In the past, luminis has been talking to various interested users and
>developers about Apache Ace, and we believe there is an interest in
>this project. Feedback at ApacheCon EU 2009 and afterwards on the
>Apache Felix mailing list confirmed that. The problem that is being
>solved is one that many software developers run into, so it should
>appeal to them. Our list of initial committers already includes people
>from different backgrounds.
>Core Developers
>The core development team is a mix of people that work for luminis and
>have been involved in the project up til now and new committers, some
>of which have previous experience at Apache.
>The initial codebase makes use of Apache Felix as its core framework.
>It also uses various other components of that project. As a project
>that builds on components we are constantly looking out for existing
>components that can accelerate our implementation and we want to
>actively work with other projects to make that happen. For building
>and testing we use Apache Ant and have developed a couple of
>extensions that help managing OSGi projects. Finally, at least
>informally a couple of projects at Apache have already expressed
>interest in a system that can help them do software provisioning.
>Known Risks
>Apache Ace uses Felix as its default OSGi implementation and some of
>its developers are also part of the Felix community. We are open to
>collaborate with other Apache projects, looking at candidates such as
>Commons, Sling, JackRabbit that could help us in certain parts of our
>An important reason for open sourcing this project at Apache is the
>strong community, as well as the Apache license. This will attract
>more users and developers so the project can be moved forward into new
>directions that we would otherwise not have been possible. Judging
>from the initial interest from some of the other projects at Apache,
>we certainly see ways in which to collaborate and advance the project,
>possibly in ways we would never have thought of. However, we have been
>able to support and develop this product outside of Apache quite well,
>so in no way are we trying to just dump the code there or merely
>trying to generate publicity.
>Initial Source
>Apache Ace has been in development within luminis since 2005.
>Source and Intellectual Property Submission Plan
>The current codebase is owned by luminis, and will be donated together
>with its documentation. We will get the paperwork out of the way as
>soon as possible. There should already be a CCLA on file for luminis
>and the people that are already involved with Apache obviously have
>ICLAs on file.
>External Dependencies
>There are quite a few open source libraries already used. The
>libraries, their sources and licenses are listed here:
>Apache Felix, ASL:
>* framework
>* shell
>* shell-tui
>* obr
>* http.jetty
>* config admin
>* event admin
>* deployment admin
>* dependency manager
>* prefs
>* upnp.basedriver
>* core
>* compendium
>* javax.servlet
>Apache Ant, ASL:
>* ant.jar
>* ant-contrib.jar
>Apache Velocity, ASL:
>* velocity
>KXML2 (, BSD license:
>* kxml2 (hmm, what was that issue we had with that in felix)
>Knopflerfish (, BSD style license:
>* log_all.jar, useradmin_all.jar
>Luminis Open Source Server (, BSD license:
>XStream (, BSD license:
>* various xstream jars
>Required Resources
>Mailing lists:
>* ace-private
>* ace-dev
>* ace-commits
>* ace-user (only after leaving the incubator)
>Issue Tracking:
>* JIRA: Apache Ace (ACE)
>* Confluence: Apache Ace (ACE)
>Initial Committers
>These existing Apache committers have either worked on the initial
>codebase (Christian, Karl and Marcel) or expressed an interest in
>extending the project:
>* Marcel Offermans
>* Karl Pauls
>* Christian van Spaandonk
>* Clement Escoffier
>* Felix Meschberger
>* Carsten Ziegeler
>Community Members
>The following people have already expressed their interest in actively
>participating in this project:
>* Bram de Kruijff
>* Toni Menzel
>* Alin Dreghiciu
>* Dennis Geurts
>For the record, Marcel Offermans, Christian van Spaandonk and Dennis
>Geurts work at luminis and might get paid to do certain work on Apache
>We have approached both the champion and an initial list of mentors
>that have agreed to mentor this project.
>* Karl Pauls
>* Carsten Ziegeler
>* Niclas Hedhman
>* Bertrand Delacretaz
>* Apache Incubator
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