# cayenne-user mailing list archives

##### Site index · List index
Message view
Top
From "Philip Miller" <philip.mil...@bbc.co.uk>
Subject RE: [POLL] loading XML configurations from filesystem
Date Tue, 20 May 2008 16:22:37 GMT
Portability means different things in different contexts.

For example I might write an application which reads its config from a
UNC file path (\\foo\bar\cayenne.xml). That application is portable to
any environment which can see that path. It allows me to administer
configuration of an indefinitely scalable server farm from a single
point. That might be a desirable design feature in the context of my
application.

To answer your question I've used 1,2 and 3 at various times when it was
appropriate to compromise on the ideal world solution.

Phil

> -----Original Message-----
> From: Andrus Adamchik [mailto:andrus@objectstyle.org]
> Sent: 20 May 2008 15:39
> To: user@cayenne.apache.org
> Subject: [POLL] loading XML configurations from filesystem
>
> Wanted to check if anybody loads "cayenne.xml" and related
> Map and Node XML files from locations other than default two:
> CLASSPATH and WEB-INF/ ?  More specifically:
>
> 1. anybody uses FileConfiguration?
> 2. anybody uses DefaultConfiguration (with 'addResourcePath' or
> without) to directly reference file in the filesystem (vs.
> referencing resources in classpath)?
> 3. anybody places DataMap / DataNode files in (jar)
> directories outside of the directory where "cayenne.xml" is located?
>
> I personally don't, as all these approaches lead to
> non-portable applications that make unwarranted assumptions
> about the environment.
> I think cases requiring to open cayenne.xml via the
> application UI are special enough to warrant a custom configuration.
>
> Some background. I am planning a rework of the config package
> to include support for merging of multiple Cayenne projects
> into a single "virtual project" in runtime (hence enabling
> multiple "persistent units" in the app). So I am looking to
> simplify this task and stop supporting edge cases that are
> not widely used, and also change the basic algorithm of
> resolving files relative to cayenne.xml to ensure they are
> actually relative to the URL within a JAR or class folder
> where cayenne.xml is found (so that we can have multiple
> cayenne.xml files and avoid conflicts when loading dependent
> XML files of those).
>
> I think there is a lot of benefit in keeping the built-in
> choices of file lookup down to just a few basic ones, and of
> course the users can still write their own Configuration
> extensions to address non-standard requirements.
>
> Andrus
>
>
>

http://www.bbc.co.uk/
This e-mail (and any attachments) is confidential and may contain personal views which are
not the views of the BBC unless specifically stated.
If you have received it in error, please delete it from your system.
Do not use, copy or disclose the information in any way nor act in reliance on it and notify
the sender immediately.
Please note that the BBC monitors e-mails sent or received.
Further communication will signify your consent to this.


Mime
View raw message