Module: FWC

Defined in:
lib/fwc.rb

Defined Under Namespace

Classes: Matcher, Raw, Summary, TraceConnection

Class Method Summary collapse

Class Method Details

.log ⇒ Object 



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# File 'lib/fwc.rb', line 25

def self.log
  @logger ||= ::Logger.new(STDOUT).tap do |l|
    l.level = Logger::INFO
    l.formatter = proc do |severity, datetime, progname, msg|
      t = datetime.strftime("%H:%M:%S")
      "#{t} #{severity}: #{msg}\n"
    end
  end
end

.main(args) ⇒ Object 



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# File 'lib/fwc.rb', line 221

def self.main(args)
  parse_options args

  matcher = Matcher.new(:key => opts[:key], :tags => opts[:tags])

  handlers = []

  if opts[:summary]
    handlers << Summary.new(matcher)
  end

  if opts[:raw]
    handlers << Raw.new(matcher, :threshold => opts[:raw_threshold])
  end

  if handlers.empty?
    puts "No methods specified"
    return 1
  end

  EM.run do
    EM.connect(opts[:host], opts[:port], FWC::TraceConnection, handlers)

    EM::PeriodicTimer.new(opts[:report_interval]) do
      handlers.each(&:report!)
    end
  end

  return 0
end

.opts ⇒ Object 



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# File 'lib/fwc.rb', line 56

def self.opts
  @@opts ||= {
    :debug => false,
    :host => "localhost",
    :port => FFWD::Debug::DEFAULT_PORT,
    :summary => false,
    :raw => false,
    :raw_threshold => 100,
    :report_interval => 10,
    :key => nil,
    :tags => nil
  }
end

.parse_options(args) ⇒ Object 



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# File 'lib/fwc.rb', line 105

def self.parse_options(args)
  parser.parse args
end

.parser ⇒ Object 



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# File 'lib/fwc.rb', line 70

def self.parser
  @@parser ||= OptionParser.new do |o|
    o.banner = "Usage: fwc [options]"

    o.on "-d", "--[no-]debug" do |d|
      opts[:debug] = d
    end

    o.on "-s", "--summary", "Show a periodic summary of everything seen" do
      opts[:summary] = true
    end

    o.on "-r", "--raw", "Display raw metrics and events, as soon as they are seen" do
      opts[:raw] = true
    end

    o.on "--raw-threshold <rate>", "Limit of how many messages/s is allowed before disabling output" do |d|
      opts[:raw_threshold] = d.to_i
    end

    o.on "-i", "--report-interval", "Interval in seconds to generate report" do |d|
      opts[:report_interval] = d.to_i
    end

    o.on "--key <key>", "Only handle events and metrics matching the specified key" do |d|
      opts[:key] = d
    end

    o.on "--tag <tag>", "Only handle event and metrics which matches the specified tag" do |d|
      opts[:tags] ||= []
      opts[:tags] << d
    end
  end
end