Class: Base::LogParser

Inherits:
Object
  • Object
show all
Defined in:
lib/base/log_parser.rb

Overview

Parse a log file

Constant Summary collapse

LOG_LINES = 
{}

Instance Method Summary collapse

Constructor Details

#initialize(file, options = {}) ⇒ LogParser

LogParser initializer file The fileobject this LogParser wil operate on.



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# File 'lib/base/log_parser.rb', line 9

def initialize(file, options = {})
  @file_name = file
  @options = options
  @file_size = File.size(@file_name)
  
  self.initialize_hook(options) if self.respond_to?(:initialize_hook)
end

Instance Method Details

#each(*line_types, &block) ⇒ Object

Finds a log line and then parses the information in the line. Yields a hash containing the information found. *line_types The log line types to look for (defaults to LOG_LINES.keys). Yeilds a Hash when it encounters a chunk of information.



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# File 'lib/base/log_parser.rb', line 31

def each(*line_types, &block)
  log_lines_hash = self.class::LOG_LINES

  
  # parse everything by default 
  line_types = log_lines_hash.keys if line_types.empty?

  File.open(@file_name) do |file|
  
    file.each_line do |line|
    
      #@progress_handler.call(file.pos, @file_size) if @progress_handler
      
      line_types.each do |line_type|
        if log_lines_hash[line_type][:teaser] =~ line
          if log_lines_hash[line_type][:regexp] =~ line
            request = { :type => line_type, :line => file.lineno }
            log_lines_hash[line_type][:params].each do |key, value|
              request[key] = case value
                when Numeric; $~[value]
                when Array;   $~[value.first].send(value.last)
                else; nil
              end
            
            end
            
            yield(request) if block_given?
          else
            warn("Unparsable #{line_type} line: " + line[0..79]) unless line_type == :failed
          end
        end            
      end
    end
    @progress_handler.call(:finished, @file_size) if @progress_handler
  end      
end

#progress(&block) ⇒ Object 



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# File 'lib/base/log_parser.rb', line 17

def progress(&block)
  @progress_handler = block
end

#warn(message) ⇒ Object

Output a warning message The warning message (object)



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# File 'lib/base/log_parser.rb', line 23

def warn(message)
  puts " -> " + message.to_s
end