[Yanel-dev] Make WAR files deployable without reconfiguration

[Michael Wechner]

Mehmet Birgi wrote:
> On Sun, May 23, 2010 at 11:49 PM, Michael Wechner
> <michael.wechner at wyona.com> wrote:
>   
>> Mehmet Birgi wrote:
>>     
>>> On Sun, May 23, 2010 at 1:21 AM, Michael Wechner
>>> <michael.wechner at wyona.com> wrote:
>>>
>>>       
>>>> Hi
>>>>
>>>> In order to make Yanel WAR files deployable without reconfiguration I
>>>> would
>>>> like to use ${catalina.base} within the log4j config:
>>>>
>>>> conf/log4j.properties
>>>>
>>>> which means the log files would be located at
>>>>
>>>> YANEL_HOME/local/apache-tomcat-5.5.20/logs/
>>>>
>>>> (if the default Tomcat is used)
>>>>
>>>> instead
>>>>
>>>> YANEL_HOME/logs
>>>>
>>>> WDYT?
>>>>
>>>>         
>>> I think that this is no problem, but we might want to change the
>>> default name of the logfile to something including "yanel" to make it
>>> easier to find. Maybe "yanel-cnode1.log"? Actually, if it is under the
>>> actual tomcat instance, the "cnode1" part would probably not be
>>> needed,
>>>       
>> now you are saying that I remember why we didn't change it, because we also
>> want to support clustered
>> environments out-of-the-box, which are sharing the same log directory, such
>> that it is easier to debug.
>>     
>
> why do you think that having both logs in one directory is important?
>   

because it is very convenient, for example one can do

tail -F logs/*

also one can specify one directory within the documentation instead two.

I am sure as soon as you will start using a clustered environment on a 
daily basis you will notice that it helps.

Cheers

Michi
> as long as they are 2 separate files, i don't understand why it makes
> a big difference. if both clusters could share a logfile, now that
> might be convenient, but that doesn't seem to be possible without
> considerable changes:
>
> "Log4j's FileAppender do not allow for two JVM's writing to the same
> file. If you try, you'll get corrupt log files. However, logback,
> log4j's successor, in prudent mode allows two appenders even in
> different JVMs to write to the same file."
>
> (found here: http://stackoverflow.com/questions/1253586/can-two-log4j-fileappenders-write-to-the-same-file)
>
> more info on logback:
> http://logback.qos.ch/index.html
> http://logback.qos.ch/manual/appenders.html#prudent
>
> apparently there is also a migrator: http://www.slf4j.org/migrator.html
>
>
>
>   
>> Let me think once more about it.
>>
>> Thanks
>>
>> Michi
>>     
>>>  I guess, so even "yanel.log" might be sufficient.
>>>
>>> Also it might be helpful to echo a message on where to find find the
>>> logfile when yanel is started.
>>>
>>> Cheers,
>>>
>>> Memo
>>>
>>>
>>>
>>>       
>>>> Thanks
>>>>
>>>> Michi
>>>> --
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>>>> http://lists.wyona.org/cgi-bin/mailman/listinfo/yanel-development
>>>>
>>>>
>>>>         
>>>
>>>
>>>       
>> --
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>> http://lists.wyona.org/cgi-bin/mailman/listinfo/yanel-development
>>
>>     
>
>
>
>