Hi all,

As some of you no doubt already know the Java broker has a few
configuration/message store implementations, with there currently
being Memory, Derby (to be split into truly generic JDBC + Derby
implementations at some point), and BDB Java Edition backed
implementations of the interfaces. Although the store code itself for
the last of these implementations carries the Apache Licence v2.0 it
depends on a library licenced under the Sleepycat licence [1], which
is classed as a Category X dependency here at Apache and so can't be
distributed by the project. As a result, this store implementation has
always been hosted elsewhere and I recently began looking into moving
it to Apache Extras. Having done so I was instead left with the
impression that it would actually be possible to move the code into
our ASF repo. This was reinforced after further investigation lead me
to instances of other Apache projects that currently are or have
previously been doing roughly what I thought to be allowable. I have
since enquired on this possibility over on legal-discuss and my
question was answered positively [2].

Based on this I propose to do the following:
- Move the BDB based store code into our ASF repo as the basis of an
optional component that is not compiled by the build process by
default, and is not referred to in the shipping broker configuration.
- Add targets to our Ant build to allow downloading the BDB jar (with
warning that it is Sleepycat licenced) and building the associated
store module.
- Improve the documentation describing how users would update their
configuration to use the optional component, and where to download the
necessary BDB dependency it requires (again with warning it is
Sleepycat licenced).

I think this will be easier going forward both for us developers and
for users, but this is a heads up in case there are those in the
community particularly against such a change being made; if so please
speak up now, as I hope to get round to doing this in the not too
distance future.

Robbie

[1] 
http://www.oracle.com/technetwork/database/berkeleydb/downloads/jeoslicense-086837.html
[2] http://s.apache.org/nP

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