Class: Cosmos::MessageLog

Inherits:
Object show all
Defined in:
lib/cosmos/utilities/message_log.rb

Overview

Handles writing message logs to a file

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tool_name, log_dir = nil) ⇒ MessageLog 



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# File 'lib/cosmos/utilities/message_log.rb', line 28

def initialize(tool_name, log_dir = nil)
  @tool_name = tool_name
  @log_dir = ConfigParser.handle_nil(log_dir)
  @log_dir = System.paths['LOGS'] unless @log_dir
  @filename = ''
  @file = nil
  @start_time = nil
end

Instance Attribute Details

#filename ⇒ String (readonly) 



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# File 'lib/cosmos/utilities/message_log.rb', line 23

def filename
  @filename
end

Instance Method Details

#start ⇒ Object

Creates a new message log and sets the filename



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# File 'lib/cosmos/utilities/message_log.rb', line 62

def start
  # Prevent starting files too fast
  sleep(0.1) until !File.exist?(File.join(@log_dir, File.build_timestamped_filename([@tool_name, 'messages'])))
  stop()
  Cosmos.set_working_dir do
    @filename = File.join(@log_dir, File.build_timestamped_filename([@tool_name, 'messages']))
    @file = File.open(@filename, 'a')
  end
end

#stop ⇒ Object

Closes the message log and marks it read only



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# File 'lib/cosmos/utilities/message_log.rb', line 52

def stop
  if @file and not @file.closed?
    @file.close
    Cosmos.set_working_dir do
      File.chmod(0444, @filename)
    end
  end
end

#write(message) ⇒ Object

Ensures the log file is opened and ready to write. It then writes the message to the log and flushes it to force the write.



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# File 'lib/cosmos/utilities/message_log.rb', line 41

def write(message)
  if @file.nil? or @file.closed? or (not File.exist?(@filename))
    start()
  end

  @file.write(message)
  # While it's nice to flush the IO this is an extreme slowdown
  #@file.flush
end