Re: Chainsaw Config help request

Paul Smith Fri, 28 Oct 2005 15:49:37 -0700

Sounds like having an MRU list might be worth adding to the Chainsaw file menu.


On 29/10/2005, at 2:19 AM, Scott Deboy wrote:

You're right, Chainsaw can load events through the menu, but it doesn't

currently have a way to 'remember' to load these files on startup.

If you feel like hacking the Chainsaw source in order to add a way

through a menu to remember to load a file on startup, go for it. If you

don't care about menu integration in Chainsaw (log4j xml config will

do), the receiver route will work as well. Again, any contributions are

welcome.

Scott

-----Original Message-----
From: Michael Pitoniak [mailto:[EMAIL PROTECTED]
Sent: Friday, October 28, 2005 9:11 AM
To: Log4J Users List
Subject: RE: Chainsaw Config help request

Scott,

 Last question i promise  :)

The XML file I need to load is one created by the log4j XML appender.

Since ChainSaw can load that file via the file menu it would imply that

chainsaw  already knew how to process exents formatted in the XML
appender format. Is this correct?

 I am sorry for my oporly worded original question is it was. If not I
am off to code what you said.

best regards,

mike



"Scott Deboy" <[EMAIL PROTECTED]>
10/28/2005 11:58 AM
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RE: Chainsaw Config help request






In order for Chainsaw to automatically load any events on startup, a
receiver has to do the work of getting the events to Chainsaw.

To process an xml-formatted logfile on startup, you need a receiver that

knows how to process the XMLLayout-formatted events in the log file.

The receiver I described below isn't a dynamic listener (it's not
tailing the log file) - it just processes the events in a log file and
forwards the events on to any thing that wants to process the events
(Chainsaw).

Scott

-----Original Message-----
From: Michael Pitoniak [mailto:[EMAIL PROTECTED]
Sent: Friday, October 28, 2005 8:53 AM
To: Log4J Users List
Subject: RE: Chainsaw Config help request

Scott,

 So many thanks. All i really need is a way for chainsaw to load a pre
existing xml file on startup, not a dynamic listener. Is there an easy
way t do just that?

thanks again.

mike



"Scott Deboy" <[EMAIL PROTECTED]>
10/28/2005 11:20 AM
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Subject
RE: Chainsaw Config help request

I don't have the time to write the receiver myself, but it's really easy

to do using the log4j 1.3 org.apache.log4j.xml.XMLDecoder.  You can

still use your new receiver with the existing WebStart-available version

of Chainsaw at http://logging.apache.org/log4j/docs/chainsaw.html.

Here is what you would need to do:
 - create a new class that extends org.apache.log4j.plugins.Receiver,
maybe called LogFileXMLReceiver

- add necessary setters/getters (for example, fileURL) to the receiver

 - in activateOptions, start a new thread that processes the events
(logic below)
 - jar up the new classes
 - add the jar to $user.home/.chainsaw/plugins
 - modify your Chainsaw xml config file to include a 'plugin' section
specifying this new receiver and required params
 - start Chainsaw via web start
 - in view-show application wide preferences, check the 'OK to remove
SecurityManager box' (allows Chainsaw to load the new jar from plugins
directory)
 - in this same screen, under automatic configuration url, specify the
URL to your config file that includes your new receiver
 - restart Chainsaw
 - post the source back to the log4j dev list so we can add it as a
contribution to log4j 1.3

Here is the logic you'd use in the new thread that processes the events:


      XMLDecoder decoder = new XMLDecoder();
        Collection c;
        try {
            c = decoder.decode(new URL(fileURL);
            for (Iterator iter = c.iterator();iter.hasNext();) {
               doPost((LoggingEvent)iter.next());
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

Hope this helps,

Scott


-----Original Message-----
From: Michael Pitoniak [mailto:[EMAIL PROTECTED]
Sent: Friday, October 28, 2005 7:49 AM
To: [email protected]
Subject: Chainsaw Config help request

team,

can someone tell me how to configure chainsaw V2 to automatically load

an XML file on startup?

many thanks,

mike

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Re: Chainsaw Config help request

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