Class: BarkestCore::LogEntry

Inherits:
Object
  • Object
show all
Includes:
ActiveModel::Model, ActiveModel::Validations, Comparable
Defined in:
app/models/barkest_core/log_entry.rb

Overview

Reads a log line from a JSON log file.

Constant Summary collapse

SEVERITY_LIST = 
%w(DEBUG INFO WARN ERROR FATAL)

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ LogEntry

Creates a LogEntry.

The args can either be a JSON string or a Hash.



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# File 'app/models/barkest_core/log_entry.rb', line 25

def initialize(*args)
  args.each do |arg|
    if arg.is_a?(String)
      arg = JSON.parse(arg).symbolize_keys rescue nil
    end
    if arg.is_a?(Hash)
      arg.each do |k,v|
        k = k.to_sym
        v = case k
              when :level
                v.to_sym
              when :time
                Time.parse(v)
              when :process_id
                v.to_i
              else
                v
            end
        instance_variable_set(:"@#{k}", v)
      end
    end
  end
end

Instance Attribute Details

#app_name ⇒ Object (readonly)

Returns the value of attribute app_name.



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# File 'app/models/barkest_core/log_entry.rb', line 13

def app_name
  @app_name
end

#app_version ⇒ Object (readonly)

Returns the value of attribute app_version.



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# File 'app/models/barkest_core/log_entry.rb', line 13

def app_version
  @app_version
end

#level ⇒ Object (readonly)

Returns the value of attribute level.



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# File 'app/models/barkest_core/log_entry.rb', line 13

def level
  @level
end

#message ⇒ Object (readonly)

Returns the value of attribute message.



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# File 'app/models/barkest_core/log_entry.rb', line 13

def message
  @message
end

#process_id ⇒ Object (readonly)

Returns the value of attribute process_id.



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# File 'app/models/barkest_core/log_entry.rb', line 13

def process_id
  @process_id
end

#time ⇒ Object (readonly)

Returns the value of attribute time.



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# File 'app/models/barkest_core/log_entry.rb', line 13

def time
  @time
end

Class Method Details

.read_log(log_file = nil) ⇒ Object

Reads a log file consisting of JSON records.

If no log file is specified, the default log file is assumed.



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# File 'app/models/barkest_core/log_entry.rb', line 85

def self.read_log(log_file = nil)
  log_file ||= Rails.root.join('log', "#{Rails.env}.log")

  ret = []

  if File.exist?(log_file)
    File.foreach(log_file, "\n").with_index do |line, index|
      line = JSON.parse(line) rescue nil
      ret << LogEntry.new(line.symbolize_keys.merge(index: index)) if line.is_a?(Hash)
    end
  end

  ret
end

Instance Method Details

#<=>(other) ⇒ Object

:nodoc:



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# File 'app/models/barkest_core/log_entry.rb', line 72

def <=>(other)
  return 1 unless other.is_a?(LogEntry)
  if index == other.index
    time <=> other.time
  else
    index <=> other.index
  end
end

#index ⇒ Object

Gets the index in the log file.



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# File 'app/models/barkest_core/log_entry.rb', line 51

def index
  @index ||= 0
end

#inspect ⇒ Object

:nodoc:



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# File 'app/models/barkest_core/log_entry.rb', line 62

def inspect
  "#<#{self.class.name} #{level} #{time} [#{app_name} #{app_version} (#{process_id})] #{message.length > 32 ? (message[0...32] + '...') : message}>"
end

#level_id ⇒ Object

Gets the level as a numeric ID.



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# File 'app/models/barkest_core/log_entry.rb', line 57

def level_id
  @level_id ||= SEVERITY_LIST.index(level.to_s.upcase) || 5
end

#to_s ⇒ Object

:nodoc:



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# File 'app/models/barkest_core/log_entry.rb', line 67

def to_s
  "#{level} #{time} [#{app_name} #{app_version} (#{process_id})] #{message}"
end