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From Mike Clarke <mike.cla...@mystyleit.com>
Subject Re: log4j-dev@logging.apache.org
Date Tue, 17 Nov 2009 18:21:18 GMT
Hi Scott,

Thanks for your response.

That is exactly what I want to do but (unfortunately) I can't figure
out from the documentation how to do that.
In the  org.apache.log4j.varia.LogFilePatternReceiver to me (I;'m more of a
admin then a dev) it just looks like the API to the class.

Then it goes on about an example (well you know what it says, it looks
like you wrote it)

I guess my real question is how to I get the example going.  Is the
example a config file example or a code example?

Could you please provide some more details about how to use the

Much Thanks,
Mike Clarke

On Tue, Nov 17, 2009 at 1:08 PM, Scott Deboy <scott.deboy@gmail.com> wrote:
> I'd suggest configuring Chainsaw with a LogFilePatternReceiver (or
> VFSLogFilePatternReceiver if you need to tail the log files or get to log
> files accessible via Jakarta Commons-VFS supported file systems).
> The JavaDoc for LogFilePatternReceiver is available from inside Chainsaw -
> help/Receiver Javadoc.
> A few things you can do with the receiver:
>  - define a custom expression (logFormat) which will define how your log
> file is parsed.  It could be as simple as 'MSG' or it could include custom
> properties (which will end up as separate columns in the table) - see the
> receiver javadoc for information on how to define the logFormat.
>  - define a 'filterExpression' param (an ExpressionFilter, which supports
> regular expressions via the 'like' keyword) which determines which log file
> entries will be processed (ignoring all other entries)
>  - the svn HEAD version of the receiver includes an 'appendNonMatches' param
> which will also include (with an 'unknown' logger) any rows which don't
> match the logFormat expression
> With Chainsaw itself, you can enable or disable cyclic buffering on a
> per-tab basis - if you turn off cyclic buffering or make it a large size,
> I'd suggest downloading Chainsaw and modify the script to increase your heap
> size).
> I also recently added a handy 'marker' feature - double-click or ctrl-f2 to
> toggle the marker on or off for a row..when you toggle a marker on, it
> creates an editable column that you can use in expressions to filter and
> search, and you can navigate between markers via f2/shift f2.
> If you save the events, the markers are also saved, so you can forward a log
> to someone else and they can see your 'notes' you've added to the log.
> I use Chainsaw to parse 50MB log files and it works pretty well..of course,
> I've spent a lot of time recently on the receiver and Chainsaw itself, so
> svn HEAD will be a lot better than the WebStart/bundle download version.
> Hope that helps
> Scott
> On Tue, Nov 17, 2009 at 8:55 AM, Mike Clarke <mike.clarke@mystyleit.com>
> wrote:
>> Hello,
>> I work with a application that generates huge text files that are not
>> XML based whatsoever.  There is a structure but nothing that Chainsaw
>> can read.
>> What I would like to do is to use chainsaw to read these files but I'm
>> not sure how to proceed.
>> (I've done a ton of searching but still am just spinning my wheels)
>> Ideally I would like to just create some short of filter using regular
>> expressions that would enable Chainsaw to read and parse the files.
>> Q1:  Is this possible/and is this documented enough that I can make it
>> happen?  Please send links!
>> Q2:  If I can't just create some sort of config file for Chainsaw, can
>> I extend Chainsaw and add my own receiver.
>> (My receiver being my code that I tell how to read the logs)
>> If so, links please, can't find anything on how to get started with this!
>> I'm not looking to do anything across sockets, this is entirely for
>> offline reading.
>> Q3:  Failing on Q1 and Q2 I could write a standalone converter to
>> convert my text logs got log4j but that seems very ugly.
>> Any ideas/links and tips would be very, very appreciated.  Currently I
>> work with a group who reads these huge logs text editors and it sucks!
>> Thanks,
>> Mike Clarke
>> http://mystyleit.com
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