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From Arindam <arindam.bosc...@gmail.com>
Subject Re: log4j and xlink
Date Tue, 20 Jan 2009 04:12:25 GMT
On Tue, Jan 20, 2009 at 9:25 AM, Curt Arnold <carnold@apache.org> wrote:

>
> On Jan 19, 2009, at 7:05 PM, Arindam wrote:
>
>  On Mon, Jan 19, 2009 at 11:52 PM, Curt Arnold <carnold@apache.org> wrote:
>>
>>>
>>> You can use external entities which the XML parser will resolve before
>>> log4j see anything.  For example:
>>>
>>> <!DOCTYPE log4j:configuration [
>>> <!ENTITY common SYSTEM "common.xml">
>>> ]>
>>> <log4j:configuration>
>>>  <!--  common stuff -->
>>>  &common;
>>>
>>>  <!--  custom stuff -->
>>> </log4j:configuration>
>>>
>>> I believe earlier versions of log4j had problems with external entities
>>> (either they didn't work at all or you had to use absolute URL since the
>>> base URL was lost).
>>>
>>>
>> Thanks Curt, it works like a charm, the only caveat being I have to put
>> the
>> external entity up as a HTTP URL publicly accessible.
>> Otherwise java.net.MalformedURLException: unknown protocol: dummy is
>> thrown
>> for a local file.
>> Basically the internal xerces handler has code only to deal with http
>> protocols, and not anything else.
>> I tried using file://common.xml , but strangely that tries to do a ftp
>> access ...
>>
>> This will satisfy my needs, but I would really like it to work without
>> running a webserver instance. Any ideas on it ?
>>
>>
>> Thanks,
>> Arindam.
>>
>
>
> What version of log4j are you using?  I could see that happening with
> earlier versions of log4j, but I don't think it would happen with log4j
> 1.2.15.  The "dummy" protocol is definitely something originating in log4j,
> not Xerces.  Xerces definitely can handle URL's relative to file: URL's.
>
>
Oh yes, works perfectly with log4j 1.2.15. Was using 1.2.11 earlier.
Thanks a lot.

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