I suspect syntax got me this time

Hi

I have created a class with a class method. I am trying to call it

from a different class and I get the “uninitialized constant” error.
Could some body help me out.

Class with class method

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and open the template in the editor.

require “log4r/logger”

class XELogger < Log4r::Logger

def XELogger.get(fullname)
begin
return self.superclass.get(fullname)
rescue NameError
return Log4r::Logger.new(fullname , nil , true , false)
end
end

end

Calling class

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and open the template in the editor.

#require “rubygems”
require “webrick”
require “log4r”
require “monitor”
#require “XELogger”
require “rexml/document”

class XmlEngine < WEBrick::HTTPServlet::FileHandler

include MonitorMixin

this is a BigNum

@@serialVersionUID = 1

@xmlParser

@htmlParsers

@hasXmlTemplate
@stcRead
@formatHashtable
@replaceHashtable

@strDriverDefault

@strUrlDefault

@strBaseLocation

@strFormatFile

@fileXmlEngineFormat

@fileBaseLocation

@sessionLanguage

@strReplaceWhat

@strReplaceWith

@isResource = false

@configXMLEngine

These loggers (xmlEngine and reloadXml) should be instantated before

they can

used.

@@log4rXmlEngine = XELogger.get[‘xmlEngine’]

@@log4rReloadXml = XELogger.get(‘reloadXml’)

Constructor

ToDo: Assign this argument to the instance variable

“connectionProvider”
def initialize(connectionProvider)
init
end

Will configure log4r from the xml configure file passed

The file object can be just the name of the file if the

file is in the same folder, if otherwise file object

should be a complete path to file’s location.

ToDo: Needs Tesing.

def self.configureLog4r(file)
if file !=nil
Configurator.load_xml_file(file)
else
Configurator.load_xml_file(log4r.xml)
end
end

Courtesy of:

http://rubynugs.blogspot.com/2006/12/creating-java-like-main-method-in-ruby.html

do

if FILE == $0 && ARGV.length < 1

@i

configureLog4r(nil)

@strFile

puts “main”

else if FILE == $0 && ARGV.length > 1

end

end

XmlEngineNP: classes for compatibilizing with the Reports version

def readReportConfiguration(strReportFile)

end

def readReportConfiguration(strReportFile, *discard)

end

# Log4r::Logger’s get method throws a NameError when it cannot find

the

# specified log file. This method will help create a new log file

when

# one doesn’t exist. ToDo: Create a subclass of Logger class and

override

# the Logger class’s get method.

def fetchLogger(_name)

begin

return @newLogFile = Log4r::Logger.get(_name)

rescue NameError

return @newLogFile = Log4r::Logger.new(_name , nil , true ,

false)

end

end

end

Venkat A. wrote:

Hi

I have created a class with a class method. I am trying to call it

from a different class and I get the “uninitialized constant” error.
Could some body help me out.

I don’t know what all that code does–it’s a mess. Here is a simple
example:

class A
def A.get
“hi”
end
end

class B
def test
puts A.get
end
end

b = B.new
b.test

–output:–
hi

Hi –

On Fri, 24 Jul 2009, Venkat A. wrote:

end
require “webrick”
@@serialVersionUID = 1

@xmlParser

@htmlParsers

@hasXmlTemplate
@stcRead
@formatHashtable
@replaceHashtable

All of those instance variables are uninitialized. You just wrote
this:

nil
nil
nil
nil

So the first step would be to delete all of them.

def initialize(connectionProvider)
Configurator.load_xml_file(file)

if FILE == $0 && ARGV.length < 1

@i

configureLog4r(nil)

@strFile

Again, you’re just stating values (nil or otherwise). If you’re not
assigning to a variable or doing something with its value, there is
never any reason to type it.

I think you’ve got some ideas about declaring variables that perhaps
come from your work in another language but that are not relevant to
Ruby. The best thing would probably be to get hold of some learning
materials and find out what instance variables actually are, and how
they’re used. That will give you a foothold as you work further on
your code.

David

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