Class: Log

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path) ⇒ Log

Returns a new instance of Log.



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# File 'lib/logmerge.rb', line 39

def initialize(path)
  @offset = 0
  if path.include?(':')
    parts = path.split(':')
    path = parts[0]
    @offset = parts[1].to_i
    if parts.size > 2
      @tag = parts[2]
    end
  end
  @file = File.open(path)
  @finished = false
  buffer
end

Instance Attribute Details

#file ⇒ Object

Returns the value of attribute file.



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# File 'lib/logmerge.rb', line 38

def file
  @file
end

#finished ⇒ Object

Returns the value of attribute finished.



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# File 'lib/logmerge.rb', line 38

def finished
  @finished
end

#line ⇒ Object

Returns the value of attribute line.



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# File 'lib/logmerge.rb', line 38

def line
  @line
end

#next ⇒ Object

Returns the value of attribute next.



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# File 'lib/logmerge.rb', line 38

def next
  @next
end

#next_timestamp ⇒ Object

Returns the value of attribute next_timestamp.



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# File 'lib/logmerge.rb', line 38

def next_timestamp
  @next_timestamp
end

#offet ⇒ Object

Returns the value of attribute offet.



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# File 'lib/logmerge.rb', line 38

def offet
  @offet
end

#tag ⇒ Object

Returns the value of attribute tag.



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# File 'lib/logmerge.rb', line 38

def tag
  @tag
end

#timestamp ⇒ Object

Returns the value of attribute timestamp.



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# File 'lib/logmerge.rb', line 38

def timestamp
  @timestamp
end

Instance Method Details

#append(current, timestamp = nil) ⇒ Object 



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# File 'lib/logmerge.rb', line 85

def append(current, timestamp=nil)
  current.prepend("[#{@tag}]") if @tag && timestamp
  @line.push(current)
end

#applyTimestamp(current, timestamp) ⇒ Object 



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# File 'lib/logmerge.rb', line 76

def applyTimestamp(current, timestamp)
  if current =~ /^\[\d\d\d\d\/\d\d\/\d\d \d\d:\d\d:\d\d\.\d\d\d\]/
    current[1...24] = timestamp.to_s
  elsif current =~ /^\d\d\d\d-\d\d-\d\dT\d\d:\d\d:\d\d\.\d\d\d[+-]\d\d\d\d/
    current[0...28] = "[#{timestamp.to_s}]"
  end
  current
end

#buffer ⇒ Object 



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# File 'lib/logmerge.rb', line 90

def buffer
  @count ||= 0
  # puts "buffer: #{@count}"
  # puts "file buffer: #{file.buf}"
  @count = @count + 1
  # TODO: add support for multiline log statements
  # basically read until next timestamp found including all lines as an entry
  @line = []
  @timestamp = nil
  timestamp_index = 0
  while @timestamp.nil? do
    current = file.readline.strip
    # puts "current: #{current}"
    @timestamp = parseTimestamp(current)
    # puts "timestamp: #{@timestamp}"
    append(current, @timestamp)
    timestamp_index = timestamp_index + 1 if @timestamp.nil?
  end

  applyTimestamp(line[timestamp_index], @timestamp) if line.size > timestamp_index

  next_timestamp = nil
  while next_timestamp.nil? do
    current = file.readline.strip
    # puts "nextcurrent: #{current}"
    next_timestamp = parseTimestamp(current)
    # puts "next_timestamp: #{next_timestamp}"
    file.unreadline(current + "\n") && break unless next_timestamp.nil?
    append(current)
  end
rescue EOFError
  @finished = true if @line.empty?
end

#parseTimestamp(current) ⇒ Object 



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# File 'lib/logmerge.rb', line 54

def parseTimestamp(current)
  # puts "parsingTimestamp: #{current}"
  # would be great to generalize this more
  ts = nil
  if current =~ /^\[\d\d\d\d\/\d\d\/\d\d \d\d:\d\d:\d\d\.\d\d\d\]/
    # agent logs
    ts_part = current[1...24]
    # puts "ts_part: #{ts_part}"
    ts = DateTime.parse(ts_part)
    ts = ts + @offset.seconds
  elsif current =~ /^\d\d\d\d-\d\d-\d\dT\d\d:\d\d:\d\d\.\d\d\d[+-]\d\d\d\d/
    #mms logs
    ts_part = current[0...28]
    # puts "ts_part: #{ts_part}"
    ts = DateTime.parse(current[0...28])
    ts = ts + @offset.seconds
  end
  ts
rescue Date::Error
  nil
end

#take ⇒ Object 



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# File 'lib/logmerge.rb', line 124

def take
  ret = line
  buffer
  ret
end