Rails - Jul 2006 - Initializing log4r once

I have a problem init''ing log4r. I have the following initialization 
code for log4r:

	Configurator[''logpath''] = ''./config'' # was
''./logs''
	Configurator.load_xml_file(''config/log4r_config.xml'')

I put it in appliction.rb, but then ofcourse at every request the logger 
system will be reinitialized. This causes the logfiles to be cleared at 
each request. which is not very usefull. Does anyone have an idea as how 
to init log4r once, at the beginning of the application run? Help would 
be very welcome.
Thanks in advance.

Fino

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> -----Original Message-----
> I have a problem init''ing log4r. I have the following 
> initialization code for log4r:
> 
> 	Configurator[''logpath''] = ''./config'' #
was ''./logs''
> 	Configurator.load_xml_file(''config/log4r_config.xml'')
> 
> I put it in appliction.rb, but then ofcourse at every request 
> the logger system will be reinitialized. This causes the 
> logfiles to be cleared at each request. which is not very 
> usefull. Does anyone have an idea as how to init log4r once, 
> at the beginning of the application run? Help would be very welcome.
> Thanks in advance.
> 
> Fino
Try putting it in the environment.rb file instead.  That should do the
trick. 

--Bill

Fino Fontana wrote:
> I have a problem init''ing log4r. I have the following
initialization
> code for log4r:
> 
> 	Configurator[''logpath''] = ''./config'' #
was ''./logs''
> 	Configurator.load_xml_file(''config/log4r_config.xml'')
> 
> I put it in appliction.rb, but then ofcourse at every request the logger 
> system will be reinitialized. This causes the logfiles to be cleared at 
> each request. which is not very usefull. Does anyone have an idea as how 
> to init log4r once, at the beginning of the application run? Help would 
> be very welcome.
> Thanks in advance.
> 
> Fino
OK, I''ll answer my own question, fine with me.
An ApplicationController object (from application.rb) gets class loaded 
and instantiated at every request to the server, at least in development 
mode. So all instance vars and class vars get thrown away and a new 
ApplicationController  object is created. So the log initialization code 
above is run again at every request if it''s in application.rb.

Solution is to put the code in environment.rb. This code seems to be run 
only once  at application start up.

So I created a LogInitializer class

class LogInitializer

    require ''log4r''
    require ''log4r/configurator''
    include Log4r

    def init()
        puts "==>LogInitializer: Starting initialization of
loggers"
        Configurator[''logpath''] = ''./config''
# was ''./logs''
        puts ("==>LogInitializer: Loading xml config")
        Configurator.load_xml_file(''config/log4r_config.xml'')
        puts ("==>LogInitializer: Xml config Loaded")
        puts "==>LogInitializer: Loggers initialized"
    end

end

and I call it from environment.rb:

    require ''log_initializer''
    li = LogInitializer.new
    li.init()


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