+1 for more IoC.

We have a lot of code here that is factory wrappers for the proprietary
Jackrabbit configuration, plus mock FileSystem implementations where a
node type manager is used in a stand-alone fashion. It's all very
pre-IoC looking.

David
-----Original Message-----
From: Jukka Zitting [mailto:[EMAIL PROTECTED] 
Sent: Sunday, January 13, 2008 7:57 PM
To: [email protected]
Subject: IoC configuration for Jackrabbit

Hi,

The current repository.xml configuration file and the related
o.a.j.core.config code is quite monolithic and essentially fixes the
structure of Jackrabbit internals. For example, almost all notable new
features require that you either modify the configuration handling code
(clustering, data store, ism locking) or just work around it (indexing).

The configuration model also makes us duplicate lots of code. For
example, instead of using a single database configuration and an
associated class/object, we now need to duplicate database connection
code in persistence managers, file systems, cluster journals, and data
stores. It's a mess.

To fix this, I'd like to make Jackrabbit configuration more IoC-like,
eventually making it possible to use an existing IoC library/container
to configure Jackrabbit. To make this happen, I'd start by dropping the
type-specific SomeConfig classes from o.a.j.core.config and replacing
the init(...) methods with setters and more explicit lifecycle
management methods.

WDYT? This'll probably require some relatively heavy-handed refactoring,
changes to the repository.xml structure, and probably some
backwards-compatibility code to handle Jackrabbit 1.4 and earlier
configuration files, so I won't go forward unless we have a reasonable
consensus that the benefits are worth the effort.

BR,

Jukka Zitting

Reply via email to